Sterling Refrigerator 30RA010 055 User Manual

30RA010-055

AquaSnap® Air-Cooled Chillers

with ComfortLink™ Controls

50/60 Hz

Controls, Start-Up, Operation,

Service, and Troubleshooting

SAFETY CONSIDERATIONS

Installing, starting up, and servicing this equipment can be

hazardous due to system pressures, electrical components, and

equipment location (roof, elevated structures, mechanical

rooms, etc.). Only trained, qualified installers and service

mechanics should install, start up, and service this equipment.

When working on this equipment, observe precautions in

the literature, and on tags, stickers, and labels attached to the

equipment, and any other safety precautions that apply. Follow

all safety codes. Wear safety glasses and work gloves. Use

care in handling, rigging, and setting this equipment, and in

handling all electrical components.

This unit uses a microprocessor-based electronic control

system. Do not use jumpers or other tools to short out

components, or to bypass or otherwise depart from recom-

mended procedures. Any short-to-ground of the control

board or accompanying wiring may destroy the electronic

modules or electrical components.

To prevent potential damage to heat exchanger, always run

fluid through heat exchanger when adding or removing

refrigerant charge. Use appropriate brine solutions in cooler

fluid loop to prevent the freezing of brazed plate heat

exchanger, optional hydronic section and/or interconnecting

piping when the equipment is exposed to temperatures

below 32 F (0 °C). Proof of flow switch and strainer are

factory installed on all models. Do NOT remove power

from this chiller during winter shutdown periods without

taking precaution to remove all water from heat exchanger

and optional hydronic system. Failure to properly protect

the system from freezing may constitute abuse and may

void warranty.

Electrical shock can cause personal injury and death. Shut

off all power to this equipment during installation and

service. There may be more than one disconnect switch.

Tag all disconnect locations to alert others not to restore

power until work is completed.

DO NOT VENT refrigerant relief valves within a building.

Outlet from relief valves must be vented outdoors in

accordance with the latest edition of ANSI/ASHRAE

(American National Standards Institute/American Society

of Heating, Refrigeration and Air Conditioning Engineers)

15 (Safety Code for Mechanical Refrigeration). The

accumulation of refrigerant in an enclosed space can

displace oxygen and cause asphyxiation. Provide adequate

ventilation in enclosed or low overhead areas. Inhalation of

high concentrations of vapor is harmful and may cause

heart irregularities, unconsciousness or death. Misuse can

be fatal. Vapor is heavier than air and reduces the amount

of oxygen available for breathing. Product causes eye and

skin irritation. Decomposition products are hazardous.

Compressors and optional hydronic system pumps require

specific rotation. Test condenser fan(s) first to ensure

proper phasing. Swap any two incoming power leads to

correct condenser fan rotation before starting any other

motors.

Refrigerant charge must be removed slowly to prevent loss

of compressor oil that could result in compressor failure.

DO NOT attempt to unbraze factory joints when servicing

this equipment. Compressor oil is flammable and there is

no way to detect how much oil may be in any of the

refrigerant lines. Cut lines with a tubing cutter as required

when performing service. Use a pan to catch any oil that

may come out of the lines and as a gage for how much oil

to add to system. DO NOT re-use compressor oil.

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

PC 903 Catalog No. 533-00047 Printed in U.S.A. Form 30RA-2T Pg 1 1-03 Replaces: 30RA-1T

Book 2

Tab 5c

Download from Www.Somanuals.com. All Manuals Search And Download.

Table 1 — Unit Sizes

Contact (dry contacts closed) positions, the chiller is allowed to

operate and respond to the scheduling configuration, SCN

configuration and set point data. See Fig. 8.

NOMINAL CAPACITY

(TONS) 50/60 Hz

UNIT

30RA010

30RA015

30RA018

30RA022

30RA025

30RA030*

30RA032†

30RA035

30RA040*

30RA042†

30RA045

30RA050*

30RA055*

10/10

14/13

16/16

22/20

24/23

35/34

Emergency On/Off Switch — The Emergency On/Off

switch should only be used when it is required to shut the

chiller off immediately. Power to the MBB, EMM, and

marquee display is interrupted when this switch is off and all

outputs from these modules will be turned off.

Board Addresses — The Main Base Board (MBB) has

a 3-position Instance jumper that must be set to ‘1.’ All other

boards have 4-position DIP switches. All switches are set to

‘On’ for all boards.

43/45

Control Module Communication

RED LED — Proper operation of the control boards can be

visually checked by looking at the red status LEDs

(light-emitting diodes). When operating correctly, the red status

LEDs should be blinking in unison at a rate of once every

2 seconds. If the red LEDs are not blinking in unison, verify

that correct power is being supplied to all modules. Be sure that

the Main Base Board (MBB) is supplied with the current

software. If necessary, reload current software. If the problem

still persists, replace the MBB. A red LED that is lit continu-

ously or blinking at a rate of once per second or faster indicates

that the board should be replaced.

GREEN LED — The MBB has one green LED. The Local

Equipment Network (LEN) LED should always be blinking

whenever power is on. All other boards have a LEN LED

which should be blinking whenever power is on. Check LEN

connections for potential communication errors at the board J3

and/or J4 connectors. Communication between modules is

accomplished by a 3-wire sensor bus. These 3 wires run in

parallel from module to module. The J4 connector on the MBB

provides both power and communication directly to the

marquee display only.

*60 Hz only.

†50 Hz only.

MAJOR SYSTEM COMPONENTS

General — The 30RA air-cooled reciprocating chillers

contain the ComfortLink™ electronic control system that

controls and monitors all operations of the chiller.

The control system is composed of several components as

listed in the sections below. See Fig. 1 and 2 for typical control

box drawing. See Fig. 3-6 for control schematics.

Main Base Board (MBB) — See Fig. 7. The MBB is

the heart of the ComfortLink control system. It contains the

major portion of operating software and controls the operation

of the machine. The MBB continuously monitors input/output

channel information received from its inputs and from all other

modules. The MBB receives inputs from the discharge and

suction pressure transducers and thermistors. See Table 2. The

MBB also receives the feedback inputs from each compressor

contactor, auxiliary contacts, and other status switches. See

Table 3. The MBB also controls several outputs. Relay outputs

controlled by the MBB are shown in Table 4. Information

is transmitted between modules via a 3-wire communication

bus or LEN (Local Equipment Network). The SCN (Sterlco

Comfort Network) bus is also supported. Connections to both

LEN and SCN buses are made at TB3. See Fig. 8.

YELLOW LED — The MBB has one yellow LED. The

Sterlco Comfort Network (SCN) LED will blink during times

of network communication.

Sterlco Comfort Network (SCN) Interface —

The 30RA chiller units can be connected to the SCN if

desired. The communication bus wiring is a shielded,

3-conductor cable with drain wire and is supplied and installed

in the field. See Table 5. The system elements are connected to

the communication bus in a daisy chain arrangement. The

positive pin of each system element communication connector

must be wired to the positive pins of the system elements on

either side of it. This is also required for the negative and

signal ground pins of each system element. Wiring connections

for SCN should be made at TB3. Consult the SCN Contrac-

tor’s Manual for further information.

Scrolling Marquee Display — This standard device

is the keypad interface used for accessing chiller information,

reading sensor values, and testing the chiller. The marquee

display is a 4-key, 4-character, 16-segment LED (light-emitting

diode) display. Eleven mode LEDs are located on the display

as well as an Alarm Status LED. See Marquee Display Usage

section on page 23 for further details.

Energy Management Module (EMM) — The EMM

module is available as a factory-installed option or as a field-

installed accessory. The EMM module receives 4 to 20 mA

inputs for the leaving fluid temperature reset, cooling set point

and demand limit functions. The EMM module also receives

the switch inputs for the field-installed 2-stage demand limit

and ice done functions. The EMM module communicates the

status of all inputs with the MBB, and the MBB adjusts the

control point, capacity limit, and other functions according to

the inputs received.

NOTE: Conductors and drain wire must be 20 AWG (Ameri-

can Wire Gage) minimum stranded, tinned copper. Individual

conductors must be insulated with PVC, PVC/nylon, vinyl,

Teflon, or polyethylene. An aluminum/polyester 100% foil

shield and an outer jacket of PVC, PVC/nylon, chrome vinyl,

or Teflon with a minimum operating temperature range of

–20 C to 60 C is required. Wire manufactured by Alpha (2413

or 5463), American (A22503), Belden (8772), or Columbia

(02525) meets the above mentioned requirements.

It is important when connecting to a SCN communication

bus that a color coding scheme be used for the entire network

to simplify the installation. It is recommended that red be used

for the signal positive, black for the signal negative, and white

for the signal ground. Use a similar scheme for cables contain-

ing different colored wires.

Enable/Off/Remote Contact Switch — The Enable/

Off/Remote Contact switch is a 3-position switch used to

control the chiller. When switched to the Enable position the

chiller is under its own control. Move the switch to the Off

position to shut the chiller down. Move the switch to the

Remote Contact position and a field-installed dry contact can

be used to start the chiller. The contacts must be capable of

handling a 24 vac, 50-mA load. In the Enable and Remote

Download from Www.Somanuals.com. All Manuals Search And Download.

At each system element, the shields of its communication

bus cables must be tied together. If the communication bus is

entirely within one building, the resulting continuous shield

must be connected to a ground at one point only. If the commu-

nication bus cable exits from one building and enters another,

the shields must be connected to grounds at the lightning

suppressor in each building where the cable enters or exits the

building (one point per building only). To connect the unit to

the network:

Table 4 — Output Relays

RELAY

NO.

DESCRIPTION

Energize Compressor A1 (010-030)

Energize Compressor A1 and Condenser Fan A1 (032-055)

Energize Compressor B1 and Condenser Fan B1 at Low

Speed (032-040)

Energize Compressor B1 and Condenser Fan B1 (042-055)

Energize Chilled Water Pump 1 Output

Energize Chilled Water Pump 2 Output

Energize Compressor A2 (all but 010, 015 60Hz)

Energize Compressor B2 (042-055 only)

Alarm Relay

1. Turn off power to the control box.

2. Cut the SCN wire and strip the ends of the red (+), white

(ground), and black (–) conductors. (Substitute appropri-

ate colors for different colored cables.)

3. Connect the red wire to (+) terminal on TB3 of the plug,

the white wire to COM terminal, and the black wire to the

(–) terminal.

4. The RJ14 SCN connector on TB3 can also be used, but is

only intended for temporary connection (for example, a

laptop computer running Service Tool).

Cooler/Pump Heater

Energize Condenser Fan at Low Speed (010-018)

Energize Condenser Fan A1 (022-030)

Energize Condenser Fan A2 (032-055)

Energize Condenser Fan at High Speed (010-018)

Energize Condenser Fan A2 (022-030)

Energize Condenser Fan B1 at High Speed (032-040)

Energize Condenser Fan B2 (042-055)

K10

K11

Minimum Load Valve

IMPORTANT: A shorted SCN bus cable will prevent some

routines from running and may prevent the unit from start-

ing. If abnormal conditions occur, unplug the connector. If

conditions return to normal, check the SCN connector and

cable. Run new cable if necessary. A short in one section of

the bus can cause problems with all system elements on the

bus.

Table 5 — SCN Communication Bus Wiring

PART NO.

Regular Wiring

1895

MANUFACTURER

Plenum Wiring

Alpha

—

A48301

884421

—

M64430

—

American

Belden

Columbia

Manhattan

Quabik

A21451

8205

D6451

M13402

6130

Table 2 — Thermistor Designations

THERMISTOR

OPERATING DATA

CONNECTION

POINT

THERMISTOR INPUT

Cooler Leaving Fluid

NO.

Sensors — The electronic control uses 3 to 6 thermistors to

sense temperatures for controlling chiller operation. See

Table 2. These sensors are outlined below. Thermistors T1, T2,

T9 and accessory suction gas temperatures (T7,T8) are 5 kΩ at

77 F (25 C) and are identical in temperature versus resistance

and voltage drop performance. Thermistor T10 is 10 kΩ at

77 F (25 C) and has a different temperature vs. resistance and

voltage drop performance. See Thermistors section for

temperature-resistance-voltage drop characteristics.

J8-13,14 (MBB)

J8-11,12 (MBB)

J8-1,2 (MBB)

Cooler Entering Fluid

Circuit A Return Gas

Temperature (Accessory)

J8-3,4 (MBB)

J8-7,8 (MBB)

Circuit B (032-055 only) Return

Gas Temperature (Accessory)

Outdoor-Air Temperature

Sensor

J8-5,6 (MBB)

TB5-5,6

Accessory Remote Space

Temperature Sensor or

Dual LWT Sensor

T10

T1 — COOLER LEAVING FLUID SENSOR — On 30RA010-

030 sizes, this thermistor is installed in a friction fit well at the

bottom of the brazed-plate heat exchanger on the control box

side. For 30RA032-055 sizes, this thermistor is installed in a

well in the factory-installed leaving fluid piping coming from

the bottom of the brazed-plate heat exchanger opposite the

control box side.

T2 — COOLER ENTERING FLUID SENSOR —On 30RA010-

030 sizes, this thermistor is installed in a friction fit well at the

top of the brazed-plate heat exchanger on the control box side.

For 30RA032-055 sizes, this thermistor is installed in a well in

the factory-installed entering fluid piping coming from the top

of the brazed-plate heat exchanger opposite the control box

side.

T7,T8 — COMPRESSOR RETURN GAS TEMPERA-

TURE SENSOR (ACCESSORY) — A well for this sensor

is factory installed in each circuit's suction line. If desired, a

5 kΩ thermistor (Sterling part number HH79NZ029) can be

installed in this well and connected to the Main Base Board

as shown in Table 2. Use the Scrolling Marquee display to con-

figure the sensor (Configuration mode, sub-mode OPT1 —

enable item RG.EN).

LEGEND

LWT

MBB

—

Leaving Water Temperature

Main Base Board

Table 3 — Status Switches

STATUS

SWITCH

PIN CONNECTION

POINT

J7-1,2

Chilled Water Pump 1

Chilled Water Pump 2

Remote On/Off

J7-3,4

TB5-9,10

J7-9,10

J9-11,12

J9-5,6

Cooler Flow Switch

Compressor Fault Signal, A1

Compressor Fault Signal, A2

Compressor Fault Signal, B1

Compressor Fault Signal, B2

J9-8,9

J9-2,3

T9 — OUTDOOR-AIR TEMPERATURE SENSOR

—

This sensor is factory-installed on a bracket at the left side of

compressor A1 on 30RA010-030 models. For models

30RA032-055, it is installed behind the panel below the

control box center door.

Download from Www.Somanuals.com. All Manuals Search And Download.

T10 — REMOTE SPACE TEMPERATURE SENSOR OR

DUAL LEAVING WATER TEMPERATURE SENSOR —

5. Connect the other end of the communication bus cable to

the remainder of the SCN communication bus.

One of two inputs can be connected to TB5-5 and TB5-6. See

appropriate sensor below.

T10 — Dual Leaving Water Temperature Sensor

—

For

dual chiller applications (parallel only are supported), connect

the dual chiller leaving fluid temperature sensor (5 kΩ ther-

mistor, Sterling part no. HH79NZ029) to the space temperature

input of the Master chiller. If space temperature is required for

reset applications, connect the sensor to the Slave chiller and

configure the slave chiller to broadcast the value to the Master

chiller.

T10 — Remote Space Temperature Sensor — Sensor T10

(part no. 33ZCT55SPT) is an accessory sensor that is remotely

mounted in the controlled space and used for space tempera-

ture reset. The sensor should be installed as a wall-mounted

thermostat would be (in the conditioned space where it will not

be subjected to either a cooling or heating source or direct

exposure to sunlight, and 4 to 5 ft above the floor).

Space temperature sensor wires are to be connected to

terminals in the unit main control box. The space temperature

sensor includes a terminal block (SEN) and a RJ11 female

connector. The RJ11 connector is used access into the Sterlco

Comfort Network (SCN) at the sensor.

LEGEND FOR FIG. 1-6

ALMR

—

Alarm Relay

Boiler Relay

Contactor, Compressor

Circuit Breaker

CCB

CHC

COMP

CWFS

CWP

DPT

EMM

FIOP

Compressor Circuit Breaker

Cooler/Pump Heater Contactor

Compressor

Chilled Water Flow Switch

Chilled Water Pump

Discharge Pressure Transducer

Energy Management

factory Installed Option

Fan Motor

To connect the space temperature sensor (Fig. 9):

1. Using a 20 AWG twisted pair conductor cable rated for

the application, connect 1 wire of the twisted pair to one

SEN terminal and connect the other wire to the other

SEN terminal located under the cover of the space

temperature sensor.

2. Connect the other ends of the wires to terminals 5 and 6

on TB5 located in the unit control box.

Units on the SCN can be monitored from the space at the

sensor through the RJ11 connector, if desired. To wire the RJ11

connector into the SCN (Fig. 10):

GND

HPS

ICP

Ground

High-Pressure Switch

Heat Relay

Inrush Current Protection

Internal Protection Thermostat

Leaving Water Temperature

Main Base Board

Minimum Load Valve

Manual Starter

LWT

MBB

MLV

OAT

Outdoor-Air Thermistor

Overload

Relay

IMPORTANT: The cable selected for the RJ11 connector

wiring MUST be identical to the SCN communication bus

wire used for the entire network. Refer to Table 5 for

acceptable wiring.

SPT

Suction Pressure Transducer

Switch

Thermistor

Terminal Block

TNKR

TRAN

Storage Tank Heater Relay

Transformer

Terminal Block

1. Cut the SCN wire and strip ends of the red (+), white

(ground), and black (–) conductors. (If another wire color

scheme is used, strip ends of appropriate wires.)

2. Insert and secure the red (+) wire to terminal 5 of the

space temperature sensor terminal block.

Terminal (Unmarked)

Terminal (Marked)

Splice

Factory Wiring

Field Wiring

3. Insert and secure the white (ground) wire to terminal 4 of

the space temperature sensor.

Accessory or Option Wiring

To indicate common potential only;

not to represent wiring.

4. Insert and secure the black (–) wire to terminal 2 of the

space temperature sensor.

Download from Www.Somanuals.com. All Manuals Search And Download.

Fig. 1 — Typical Control Box for 30RA010-030 (022-030 Shown)

Download from Www.Somanuals.com. All Manuals Search And Download.

Fig. 2 — Typical Control Box for 30RA032-055 (042-055 Shown)

Download from Www.Somanuals.com. All Manuals Search And Download.

30RA010-018 AQUA SNAP

Fig. 3 — Wiring Schematic 30RA010-018

Download from Www.Somanuals.com. All Manuals Search And Download.

AQUA-SNAP LOW VOLTAGE CONTROL SCHEMATIC (010-018)

SEE NOTE 8

Fig. 3 — Wiring Schematic 30RA010-018 (cont)

Download from Www.Somanuals.com. All Manuals Search And Download.

30RA022-030 AQUA SNAP

Fig. 4 — Wiring Schematic 30RA022-030

Download from Www.Somanuals.com. All Manuals Search And Download.

AQUA-SNAP LOW VOLTAGE CONTROL SCHEMATIC (022-030)

Fig. 4 — Wiring Schematic 30RA022-030 (cont)

Download from Www.Somanuals.com. All Manuals Search And Download.

30RA032-040 AQUA SNAP

Fig. 5 — Wiring Schematic 30RA032-040

Download from Www.Somanuals.com. All Manuals Search And Download.

AQUA-SNAP LOW VOLTAGE CONTROL SCHEMATIC (032-040)

Fig. 5 — Wiring Schematic 30RA032-040 (cont)

Download from Www.Somanuals.com. All Manuals Search And Download.

30RA042-055 AQUA SNAP

Fig. 6 — Wiring Schematic 30RA042-055

Download from Www.Somanuals.com. All Manuals Search And Download.

AQUA-SNAP LOW VOLTAGE CONTROL SCHEMATIC (042-055)

Fig. 6 — Wiring Schematic 30RA042-055 (cont)

Download from Www.Somanuals.com. All Manuals Search And Download.

RED LED - STATUS

GREEN LED -

LEN (LOCAL EQUIPMENT NETWORK)

YELLOW LED -

SCN (STERLCO COMFORT NETWORK)

INSTANCE JUMPER

CEPL130346-01

K11

K10

STATUS

J10

LEN

SCN

Fig. 7 — Main Base Board

MODE

Run Status

Service Test

Temperature

ENABLE/OFF/REMOTE

CONTACT SWITCH

TB3

REMOTE

CONTACT

Pressures

Setpoints

Inputs

Alarm Status

OFF

SW1

Outputs

Configuration

Time Clock

Operating Modes

Alarms

ESCAPE ENTER

ENABLE

OFF

SW2

SCN

COMMUNICATIONS

CB1

CB2

EMERGENCY

ON/OFF SWITCH

Fig. 8 — LEN/SCN Interface, Enable/Off/Remote Contact Switch, and Emergency On/Off Switch Locations

Download from Www.Somanuals.com. All Manuals Search And Download.

refrigeration circuit is also supplied with a factory-installed

liquid line filter drier and sight glass.

The TXV is set at the factory to maintain approximately 8 to

12° F (4.4 to 6.7° C) suction superheat leaving the cooler by

metering the proper amount of refrigerant into the cooler. All

TXVs are adjustable, but should not be adjusted unless

absolutely necessary.

SPT (T10) PART NO. 33ZCT55SPT

SENSOR

TB5

SEN

The TXV is designed to limit the cooler saturated suction

temperature to 55 F (12.8 C). This makes it possible for unit to

start at high cooler fluid temperatures without overloading the

compressor.

Fig. 9 — Typical Space Temperature

Sensor Wiring

Capacity Control — The control system cycles com-

pressors, and minimum load valve solenoids (if equipped) to

maintain the user-configured leaving chilled fluid temperature

set point. Entering fluid temperature is used by the Main Base

Board (MBB) to determine the temperature drop across the

cooler and is used in determining the optimum time to add or

subtract capacity stages. The chilled fluid temperature set point

can be automatically reset by the return fluid temperature,

space, or outdoor-air temperature reset features. It can also be

reset from an external 4 to 20-mA signal (requires Energy

Management Module FIOP or accessory).

The control has an automatic lead-lag feature built in which

determines the wear factor (combination of starts and run

hours) for each compressor. If all compressors are off and less

than 30 minutes has elapsed since the last compressor was

turned off, the wear factor is used to determine which compres-

sor to start next. If no compressors have been running for more

than 30 minutes and the leaving fluid temperature is greater

than the saturated condensing temperature, the wear factor is

still used to determine which compressor to start next. If the

leaving fluid temperature is less than the saturated condensing

temperature, then the control will start either compressor A1 or

compressor B1 first, depending on the user-configurable circuit

lead-lag value.

The TXVs will provide a controlled start-up. During start-

up, the low pressure logic will be bypassed for 2¹/₂minutes to

allow for the transient changes during start-up. As additional

stages of compression are required, the processor control will

add them. See Table 6 and 7.

If a circuit is to be stopped, the compressor with the lowest

wear factor will be shut off first in most cases. Certain override

conditions may shut off the smaller of two compressors on a

circuit first.

The capacity control algorithm runs every 30 seconds. The

algorithm attempts to maintain the Control Point at the desired

set point. Each time it runs, the control reads the entering and

leaving fluid temperatures. The control determines the rate at

which conditions are changing and calculates 2 variables based

on these conditions. Next, a capacity ratio is calculated using

the 2 variables to determine whether or not to make any

changes to the current stages of capacity. This ratio value

ranges from –100 to +100%. If the next stage of capacity is a

compressor, the control starts (stops) a compressor when the

ratio reaches +100% (–100%). If installed, the minimum load

valve solenoid will be energized with the first stage of capacity.

Minimum load valve value is a fixed 30% in the total capacity

calculation. The control will also use the minimum load valve

solenoid as the last stage of capacity before turning off the last

compressor. If the close control feature (CLS.C) [Configura-

tion, OPT2] is enabled the control will use the minimum load

valve solenoid whenever possible to fine tune leaving fluid

temperature control. A delay of 90 seconds occurs after each

capacity step change. Refer to Tables 6 and 7.

T-55 SPACE

SENSOR

SCN+

TO SCN

SCN GND

COMM 1

BUS (PLUG)

AT UNIT

SCN-

Fig. 10 — SCN Communications Bus Wiring

to Optional Space Sensor RJ11 Connector

Energy Management Module (Fig. 11) — This

factory-installed option (FIOP) or field-installed accessory is

used for the following types of temperature reset, demand

limit, and/or ice features:

•

4 to 20 mA leaving fluid temperature reset (requires

field-supplied 4 to 20 mA generator)

4 to 20 mA cooling set point reset (requires field-

supplied 4 to 20 mA generator)

Discrete inputs for 2-step demand limit (requires field-

supplied dry contacts capable of handling a 24 vac,

50 mA load)

4 to 20 mA demand limit (requires field-supplied 4 to

20 mA generator)

•

Discrete input for Ice Done switch (requires field-

supplied dry contacts capable of handling a 24 vac,

50 mA load)

See Demand Limit and Temperature Reset sections on

pages 44 and 43 for further details.

Care should be taken when interfacing with other manufac-

turer’s control systems due to possible power supply

differences, full wave bridge versus half wave rectification.

The two different power supplies cannot be mixed.

ComfortLink™ controls use half wave rectification. A

signal isolation device should be utilized if a full wave

bridge signal generating device is used.

Loss-of-Cooler Flow Protection —A proof-of-cooler

flow device is factory installed in all chillers. It is recommended

that proper operation of the switch be verified on a regular basis.

Thermostatic Expansion Valves (TXV) — All units

are equipped from the factory with conventional TXVs. Each

Download from Www.Somanuals.com. All Manuals Search And Download.

CEBD430351-0396-01C

LEN

STATUS

TEST 2

GREEN LED -

LEN (LOCAL EQUIPMENT NETWORK)

ADDRESS

DIP SWITCH

RED LED - STATUS

Fig. 11 — Energy Management Module

Table 6 — Part Load Data Percent Displacement, Standard Units without Minimum Load Valve

LOADING SEQ A

LOADING SEQ B

CONTROL

STEPS

30RA UNIT SIZE

% Displacement

Compressor

% Displacement

Compressor

010,015 (60 Hz)

015 (50 Hz), 018

100

A1,A2

—

100

A1, A2

—

022 (60 Hz)

100

A1,A2

—

022 (50 Hz), 025, 030

032, 035 (60 Hz)

035 (50 Hz)

040

A1,A2

A1,B1

100

A1,A2,B1

100

A1,A2,B1

100

A1, A2

A1, B1

A1, A2, B1

A1, A2

A1, B1

A1, A2, B1

A1,B1

042, 045 (50 Hz), 050,

055

A1,A2,B1

A1,B1,B2

100

A1,A2,B1,B2

100

A1,A2,B1,B2

A1,B1

045 (60 Hz)

A1,A2,B1

A1,B1,B2

100

A1,A2,B1,B2

100

A1,A2,B1,B2

NOTE: These capacity steps may vary due to different capacity staging sequences.

Download from Www.Somanuals.com. All Manuals Search And Download.

Table 7 — Part Load Data Percent Displacement, Standard Units with Minimum Load Valve

LOADING SEQ A

LOADING SEQ B

CONTROL

STEPS

30RA UNIT SIZE

% Displacement

Compressor

% Displacement

Compressor

69/ 71

A1*

—

010 (50/60 Hz)

015 (60 Hz)

100/100

100

A1*

—

015 (50 Hz)

018 (50/60 Hz)

022 (50/60 Hz)

025 (50/60 Hz)

030

100

A1,A2

32/ 31

50/ 50

100/100

27/ 35

42/ 50

100/100

38/ 37

50/ 50

100/100

100

A1*

A1,A2

A1*

A1,A2

A1*

A1,A2

A1*

A1,A2

—

A1*

B1*

032

035 (50/60 Hz)

040

A1,A2

A1,A2,B1

A1,B1

A1,A2,B1

100

16/25

25/33

60/67

100

A1*

A1,A2

A1,A2,B1

A1*

A1,A2

A1,A2,B1

32/25

40/33

65/67

100

B1*

A1,B1

A1,A2,B1

B1*

A1,B1

A1,A2,B1

100

A1*

B1*

042

A1,B1

100

A1,A2,B1

A1,A2,B1,B2

100

A1,B1,B2

A1,A2,B1,B2

A1*

B1*

045 (60 Hz)

045 (50 Hz), 050

A1,B1

100

A1,A2,B1

A1,A2,B1,B2

100

A1,B1,B2

A1,A2,B1,B2

A1*

A1,B1

B1*

A1,B1

A1,A2,B1

A1,A2,B1,B2

A1,B1,B2

A1,A2,B1,B2

100

A1*

B1*

055

A1,B1

100

A1,A2,B1

A1,A2,B1,B2

100

A1,B1,B2

A1,A2,B1,B2

*Minimum Load Valve energized.

NOTE: These capacity steps may vary due to different capacity

staging sequences.

Download from Www.Somanuals.com. All Manuals Search And Download.

MINUTES LEFT FOR START — This value is displayed

only in the network display tables (using Service Tool,

ComfortVIEW™ or ComfortWORKS® software) and

represents the amount of time to elapse before the unit will start

its initialization routine. This value can be zero without the

machine running in many situations. This can include being

unoccupied, ENABLE/OFF/REMOTE CONTACT switch in

the OFF position, SCN not allowing unit to start, Demand

Limit in effect, no call for cooling due to no load, and alarm or

alert conditions present. If the machine should be running and

none of the above are true, a minimum off time (DELY, see

below) may be in effect. The machine should start normally

once the time limit has expired.

MINUTES OFF TIME (DELY) [Configuration OPT2] —

This user-configurable time period is used by the control to

determine how long unit operation is delayed after power is

applied/restored to the unit. Typically, this time period is con-

figured when multiple machines are located on a single site.

For example, this gives the user the ability to prevent all the

units from restarting at once after a power failure. A value of

zero for this variable does not mean that the unit should be

running.

LEAD/LAG DETERMINATION — This is a configurable

choice and is factory set to be automatic for all units. The value

can be changed to Circuit A or Circuit B leading as desired. Set

at automatic, the control will sum the current number of logged

circuit starts and one-quarter of the current operating hours for

each circuit. The circuit with the lowest sum is started first.

Changes to which circuit is the lead circuit and which is the lag

are also made when total machine capacity is at 100% or when

there is a change in the direction of capacity (increase or

decrease) and each circuit’s capacity is equal.

Slow Change Override — The control prevents the capacity

stages from being changed when the leaving fluid temperature

is close to the set point (within an adjustable deadband) and

moving towards the set point.

Ramp Loading (CRMP) [Configuration, SLCT] — Limits the

rate of change of leaving fluid temperature. If the unit is in a

Cooling mode and configured for Ramp Loading, the control

makes 2 comparisons before deciding to change stages of ca-

pacity. The control calculates a temperature difference between

the control point and leaving fluid temperature. If the differ-

ence is greater than 4 °F (2.2 °C) and the rate of change (°F or

°C per minute) is more than the configured Cooling Ramp

Loading value (CRMP), the control does not allow any chang-

es to the current stage of capacity.

Low Entering Fluid Temperature Unloading — When the

entering fluid temperature is below the control point, the

control will attempt to remove 25% of the current stages being

used. If exactly 25% cannot be removed, the control removes

an amount greater than 25% but no more than necessary. The

lowest stage will not be removed.

Minimum Load Control — If equipped, the minimum load

control valve is energized only when one compressor in the

circuit is running. If the close control feature is enabled the

minimum load control valve may be used as needed to obtain

leaving fluid temperature close to set point.

Cooler Freeze Protection — The control will try to prevent

shutting the chiller down on a Cooler Freeze Protection alarm

by removing stages of capacity. If the cooler fluid selected

is Water, the freeze point is 34 F (1.1 C). If the cooler fluid

selected is Brine, the freeze point is the Brine freeze Point

(BR.FZ) [Set Points, FRZ]. This alarm condition (A207) only

references leaving fluid temperature and NOT Brine Freeze

point. If the cooler leaving fluid temperature is less than the

freeze point plus 2.0° F (1.1° C), the control will immediately

remove one stage of capacity. This can be repeated once every

30 seconds.

Low Saturated Suction Protection — The control will try to

prevent shutting a circuit down due to low saturated suction

conditions by removing stages of capacity. These circuit alert

conditions (T116, T117) compare saturated suction tempera-

ture to the configured Brine Freeze point (BR.FZ) [Set Points,

FRZ]. The Brine Freeze point is a user-configurable value that

must be left at 34 F (1.1 C) for 100% water systems. A lower

value may be entered for systems with brine solutions, but this

value should be set according to the freeze protection level of

the brine mixture. Failure to properly set this brine freeze point

value may permanently damage the brazed plate heat exchang-

er. The control will initiate Mode 7 (Circuit A) or Mode 8 (Cir-

cuit B) to indicate a circuit’s capacity is limited and that even-

tually the circuit may shut down.

CAPACITY CONTROL OVERRIDES — The following over-

rides will modify the normal operation of the routine.

Deadband Multiplier — The user configurable Deadband

Multiplier (Z.GN) [Configuration, SLCT] has a default value

of 1.0. The range is from 1.0 to 4.0. When set to other than 1.0,

this factor is applied to the capacity Load/Unload Factor. The

larger this value is set, the longer the control will delay between

adding or removing stages of capacity. Figure 12 shows how

compressor starts can be reduced over time if the leaving water

temperature is allowed to drift a larger amount above and be-

low the set point. This value should be set in the range of 3.0 to

4.0 for systems with small loop volumes.

First Stage Override — If the current capacity stage is zero,

the control will modify the routine with a 1.2 factor on adding

the first stage to reduce cycling. This factor is also applied

when the control is attempting to remove the last stage of

capacity.

2 STARTS

DEADBAND EXAMPLE

200

400

600

800

1000

3 STARTS

TIME (SECONDS)

STANDARD

DEADBAND

LEGEND

LWT — Leaving Water Temperature

MODIFIED

DEADBAND

Fig. 12 — Deadband Multiplier

Download from Www.Somanuals.com. All Manuals Search And Download.

saturated condensing and saturated suction temperatures so

that the compressor(s) is (are) always operating within the

manufacturer's specified envelope (see Fig. 13). The control

will automatically reduce the unit capacity as the saturated

condensing temperature approaches an upper limit. The

control will indicate through an alert that a high ambient

unloading mode is in effect. If the saturated condensing

temperature in a circuit exceeds the calculated maximum, the

circuit will be stopped. For these reasons, there are no head

pressure control methods or set points to enter. If the saturated

condensing temperature in a circuit is greater than or equal to

95 F (35 C) at start-up, all available condenser fans will be

started to prevent excessive discharge pressure during

pull-down. The control will turn off a fan stage when the

condensing temperature has been below the calculated head

pressure set point by 35 F (19.4 C) for more than 2 minutes.

Fan sequences are shown in Fig. 14.

MOTORMASTER® V OPTION — For low-ambient opera-

tion, the lead fan on a circuit can be equipped with the

Motormaster V head pressure controller option or accessory.

The control will automatically raise the head pressure set point

by 5 F (2.8 C) when Motormaster control is configured. The

controller is energized with the first fan stage and adjusts fan

speed to maintain a liquid pressure of 135 psig (931 kPa). For

sizes 010-018 and Circuit B of sizes 032-040, the two-speed

fan is wired for high speed operation and the Motormaster V

controller adjusts fan speed. For size 022-030, 042-055 and

circuit A of the 032-040 sizes, the lead fan (A1 or B1) in the

circuit is controlled. Refer to Fig. 14 for condenser fan staging

information. Refer to Fig. 15 for typical pressure transducer

location.

Head Pressure Control — The Main Base Board

(MBB) controls the condenser fans to maintain the lowest

condensing temperature possible, and thus the highest unit

efficiency. The MBB uses the saturated condensing tempera-

ture input from the discharge pressure transducer to control the

fans. Head pressure control is maintained through a calculated

set point which is automatically adjusted based on actual

160

154

149

140

120

100

105

47.5

-10 -5

10 15 20 25 30 35 40 45 50 55

R-22 SST (F)

LEGEND

SCT

SST

—

Saturated Condensing Temperature

Saturated Suction Temperature

Fig. 13 — Operating Envelope for

R-22 Maneurop Compressor

FAN ARRANGEMENT

30RAN010-018

CONTROL

FAN NO.

FAN RELAY

NORMAL CONTROL

Energize Fan at

Low Speed

FC-LS

FC-HS

FC-A1

FC-A2

BOX

Energize Fan at

High Speed

END

30RAN022-030

First Stage

Condenser Fan

CONTROL

BOX

Second Stage

Condenser Fan

END

On with Compressor A1

and/or Compressor A2

First Stage Condenser

Fan, Circuit A

Low Speed, Fan on

w/Compressor B1

Energize Fan at High Speed,

Circuit B

On with Compressor A1

and/or Compressor A2

First Stage Condenser Fan,

Circuit A

On with Compressor B1

and/or Compressor B2

First Stage Condenser Fan,

Circuit B

30RAN032-040

FC-A1

FC-A2

FC-LS

FC-HS

FC-A1

FC-A2

FC-B1

FC-B2

CONTROL

BOX

END

30RAN042-055

CONTROL

BOX

END

Fig. 14 — 30RA Condenser Fan Sequence

Download from Www.Somanuals.com. All Manuals Search And Download.

DETAIL A

PRESSURE TRANSDUCER

INSTALLED HERE

SEE DETAIL A

Fig. 15 — Typical Motormaster® V Controller and Pressure Transducer Location (Sizes 022-030 Shown)

Operation of Machine Based on Control

Method and Cooling Set Point Selection Set-

tings — Machine On/Off control is determined by the

configuration of the control method (CTRL) [Configuration,

OPT2] and cooling set point select (CLSP) [Configuration,

SLCT] variables. All models are factory configured with cool-

ing set point select set to 1 (single set point, CSP1). With the

control method set to 0, simply switching the Enable/Off/Re-

mote Contact switch to the Enable or Remote Contact position

(external contacts closed) will put the chiller in an occupied

state. The control mode [Operating Modes, MODE] will be 1

(OFF LOCAL) when the switch is Off and will be 5 (ON LO-

CAL) when in the Enable position or Remote Contact position

with external contacts closed.

Two other control methods are available for Machine On/

Off control:

OCCUPANCY SCHEDULE (CTRL=2) — The Main Base

Board will use the operating schedules as defined under the

Time Clock mode in the Marquee display. These schedules are

identical. The schedule number must be set to 1 for local

schedule.

Table 8 illustrates how the control method and cooling set

point select variables direct the operation of the chiller and the

set point to which it controls. The illustration also shows the

ON/OFF state of the machine for the given combinations.

Cooling Set Point Select

SINGLE — Unit operation is based on Cooling Set Point 1

(CSP1) [Set Point, COOL].

DUAL SWITCH — Unit operation is based on Cooling Set

Point 1 (CSP1) [Set Point, COOL] when the Dual Set Point

switch contacts are open and Cooling Set Point 2 (CSP2)

[Set Point, COOL] when they are closed.

DUAL SCN OCCUPIED — Unit operation is based on

Cooling Set Point 1 (CSP1) [Set Point, COOL] during the

Occupied mode and Cooling Set Point 2 (CSP2) [Set Point,

COOL] during the Unoccupied mode as configured under the

local occupancy schedule accessible only from SCN. Schedule

Number in Table SCHEDOVR (See Appendix A) must be

configured to 1. If the Schedule Number is set to 0, the unit will

operate in a continuous 24-hr Occupied mode. Control method

must be configured to 0 (switch). See Table 8.

4 TO 20 mA INPUT — Unit operation is based on an external

4 to 20 mA signal input to the Energy Management Module

(EMM).

The schedule number can be set anywhere from 65 to 99

for operation under a SCN global schedule. The Enable/Off/

Remote Contact must be in the Enable or Remote Contact posi-

tion. The control mode [Operating Modes, MODE] will be 1

when the switch is Off. The control mode will be 3 when the

Enable/Off/Remote Contact switch input is On and the time of

day is during an unoccupied period. Similarly, the control

mode will be 7 when the time of day is during an occupied

period.

SCN SCHEDULE (CTRL=3) — An external SCN device

such as Flotronic™ System Manager controls the On/Off state

of the machine. This SCN device forces the variable

‘CHIL_S_S’ between Start/Stop to control the chiller. The

control mode [Operating Modes, MODE] will be 1 when the

switch is Off. The control mode will be 2 when the Enable/Off/

Remote Contact switch input is On and the CHIL_S_S variable

is ‘Stop.’ Similarly, the control mode will be 6 when the

CHIL_S_S variable is ‘Start.’

LOW SOUND MODE OPERATION — All models are fac-

tory configured with the Low Sound Mode disabled. In the

Configuration mode under sub-mode OPT2, items for low

sound mode select (LS.MD), low sound start time (LS.ST),

low sound end time (LS.ND) and low sound capacity limit

(LS.LT) are factory configured so that the chiller always runs

as quietly as possible. This results in operation at increased

saturated condensing temperature. As a result, some models

may not be able to achieve rated efficiency. For chiller opera-

tion at rated efficiency, disable the low sound mode or adjust

the low sound mode start and stop times accordingly or set both

times to 00:00 for rated efficiency operation 24 hours per day.

In addition, the low sound capacity limit can be used to reduce

overall chiller capacity, if required, by limiting the maximum to

a user-configured percentage.

Download from Www.Somanuals.com. All Manuals Search And Download.

Table 8 — Control Methods and Cooling Set Points

COOLING SET POINT SELECT (CLSP)

CONTROL

TYPE

(CTRL)

OCCUPANCY

STATE

(single)

(dual, switch)

(dual, occ)

(4 to 20 mA)

Occupied

Unoccupied

Occupied

Unoccupied

Occupied

Unoccupied

ON,CSP1

OFF

ON,CSP1

ON*

OFF

ON*

ON,CSP1

ON,CSP2

Illegal

ON,CSP1

ON,CSP2

ON†

OFF

ON†

0 (switch)

2 (Occupancy)

3 (SCN)

*Dual set point switch input used. CSP1 used when switch input is open. CSP2 used when switch input is closed.

†Cooling set point determined from 4 to 20 mA input to Energy Management Module (EMM) to terminals TB6-3,5.

HEATING OPERATION — The chiller can be used for

pump outputs or optional factory-installed hydronic system

operation can be utilized for heating applications. The heating

mode is activated when the control sees a field-supplied closed

switch input to terminal block TB5-7,8. The control locks out

cooling when the heat relay input is seen. A field-supplied

boiler relay connection is made using heat relay and alarm

relay contacts. Factory-installed ‘BOILER’ connections exist

in the control panel near TB5 for these applications. Alarms

and alerts A189 through A202 are active during heating

operation.

NOTE: When the LANG variable is changed to 1, 2, or 3, all

appropriate display expansions will immediately change to the

new language. No power-off or control reset is required when

reconfiguring languages.

When a specific item is located, the display will flash show-

ing the operator, the item, followed by the item value and then

followed by the item units (if any). Press the

key to

ENTER

stop the display at the item value. Items in the Configuration

and Service Test modes are password protected. The display

will flash PASS and WORD when required. Use the

ENTER

and arrow keys to enter the 4 digits of the password. The

default password is 1111.

Marquee Display Usage (See Fig. 16 and

Tables 8-27) — The Marquee display module provides the

user interface to the ComfortLink™ control system. The

Changing item values or testing outputs is accomplished in

the same manner. Locate and display the desired item. Press

display has up and down arrow keys, an

key, and an

ESCAPE

key. These keys are used to navigate through the

ENTER

different levels of the display structure. See Table 9. Press the

key until the display is blank to move through the

to stop the display at the item value. Press the

key again so that the item value flashes. Use the

ENTER

ESCAPE

arrow keys to change the value or state of an item and press the

top 11 mode levels indicated by LEDs on the left side of the

display.

key to accept it. Press the key and the

ENTER

ESCAPE

item, value, or units display will resume. Repeat the process as

required for other items.

Pressing the

and

keys simultaneously

ENTER

ESCAPE

will scroll a clear language text description across the display

indicating the full meaning of each display acronym. Pressing

See Tables 8-27 for further details.

Service Test (See Table 11) — Both main power

the

and

keys when the display is blank

ENTER

ESCAPE

and control circuit power must be on.

(Mode LED level) will return the Marquee display to its default

menu of rotating display items. In addition, the password will

be disabled requiring that it be entered again before changes

can be made to password protected items.

The Service Test function should be used to verify proper

operation of condenser fan(s), compressors, minimum load

valve solenoid (if installed), cooler pump(s) and remote alarm

relay. To use the Service Test mode, the Enable/Off/Remote

Contact switch must be in the OFF position. Use the display

keys and Table 11 to enter the mode and display TEST. Press

Clear language descriptions in English, Spanish, French, or

Portuguese can be displayed when properly configuring the

LANG Item in the Configuration Mode, under the Display

(DISP) submode. See Table 17. Throughout this text, the loca-

tion of items in the menu structure will be described in the fol-

lowing format:

twice so that OFF flashes. Enter the password if

ENTER

required. Use either arrow key to change the TEST value to the

ON position and press . Press and the

ENTER

ESCAPE

Item Expansion (ITEM) [Mode Name, Sub-mode Name]

For example, using the language selection item:

Language Selection (LANG) [Configuration, DISP]

button to enter the OUTS or COMP sub-mode.

Test the condenser fans, cooler pump(s) and alarm relay by

changing the item values from OFF to ON. These discrete

outputs are then turned off if there is no keypad activity for

10 minutes. Test the compressor and minimum load valve

solenoid (if installed) outputs in a similar manner. The

minimum load valve solenoids will be turned off if there is no

keypad activity for 10 minutes. Compressors will stay on until

they are turned off by the operator. The Service Test mode will

remain enabled for as long as there is one or more compressors

running. All safeties are monitored during this test and will turn

a compressor, circuit or the machine off if required. Any other

mode or sub-mode can be accessed, viewed, or changed during

the TEST mode. The STAT item [Run/Status, VIEW] will dis-

play “0” as long as the Service mode is enabled. The TEST

sub-mode value must be changed back to OFF before the chill-

er can be switched to Enable or Remote contact for normal

operation.

MODE

Run Status

Service Test

Temperature

Pressures

Setpoints

Alarm Status

Inputs

Outputs

Configuration

Time Clock

Operating Modes

Alarms

ESCAPE ENTER

Fig. 16 — Scrolling Marquee Display

Download from Www.Somanuals.com. All Manuals Search And Download.

• Cooler Pump 1 Enable (PM1E) [Configuration, UNIT]

Optional Factory-Installed Hydronic Package —

If the chiller has factory-installed chilled fluid pumps, specific

steps should be followed for proper operation.

NO.

• Cooler Pump 2 Enable (PM2E) [Configuration, UNIT]

NO.

The pump(s) in the hydronic package come factory

pre-wired into the main unit power supply/starter. In order to

check proper pump rotation, use the Service Test function to

test the condenser fans and observe them for proper rotation

(counter clockwise when viewed from the top). If fans turn

correctly, the pumps will rotate correctly. Clockwise rotation of

the pump motor cooling fans can also be used to determine that

pumps are rotating correctly.

The maximum load allowed for the Chilled Water Pump

Starter is 5 VA sealed, 10 VA inrush at 24 volts. The starter coil

is powered from the chiller control system. The starter should

be wired between TB5-11 and TB5-13. If equipped, the field-

installed chilled water pump starter auxiliary contacts should

be connected in series with the chilled water flow switch.

The Cooler Pump Relay will be energized when the

machine is “On.” The chilled water pump interlock circuit

consists of a chilled water flow switch and a field-installed

chilled water pump interlock. If the chilled water pump inter-

lock circuit does not close within five (5) minutes of starting,

an A200 — Cooler Flow/Interlock failed to close at Start-Up

alarm will be generated and chiller will not be allowed to start.

If the chilled water pump interlock or chilled water flow

switch opens for at least three (3) seconds after initially being

closed, an A201 — Cooler Flow/Interlock Contacts Opened

During Normal Operation Alarm will be generated and the ma-

chine will stop.

NO INTEGRAL PUMP — DUAL EXTERNAL PUMP

CONTROL — With two external pumps, the following

options must be configured:

Operation of pump in wrong direction, even for a few

seconds, can cause irreversible damage to pump impeller

and housing. Always verify correct wiring/pump rotation

before operation.

Use Service Test function to test operation of pumps. Verify

that the flow switch input is made when the pump is running.

For dual pump hydronic systems, the control only uses one

pump at a time. Consult the Installation Instructions supplied

with this chiller and use the circuit setter balancing valve

installed in hydronic package to adjust fluid flow rate.

Cooler Pump Control — The 30RA AquaSnap® ma-

chines equipped with a factory installed pump package are

configured with the Cooler Pump Control (CPC) [Configura-

tion, OPT1] ON.

Machines not equipped with a pump package are config-

ured with the cooler pump control OFF. It is recommended that

the machine control the chilled water pump. If not, a 5-minute

time delay is required after the command to shut the machine

down is sent before the chilled water pump is turned off. This is

required to maintain water flow during the shutdown period of

the machine.

With or without this option enabled, the cooler pump relay

will be energized when the machine enters an ON status (i.e.,

On Local, On SCN, On Time). An A207 - Cooler Freeze

Protection Alarm, will energize the cooler pump relay also, as

an override. The cooler pump relay will remain energized if the

machine is in MODE 10 – Minimum Off Time.

• Cooler Pump Control (CPC) [Configuration, OPT1] ON.

• Cooler Pump 1 Enable (PM1E) [Configuration, UNIT]

YES.

• Cooler Pump 2 Enable (PM2E) [Configuration, UNIT]

YES.

The maximum load allowed for the Chilled Water Pump

Starters is 5 VA sealed, 10 VA inrush at 24 volts. The starter

coil is powered from the chiller control system. The starter for

Chilled Water Pump 1 should be wired between TB5-11 and

TB5-13. The starter for Chilled Water Pump 2 should be wired

between TB5-15 and TB5-13. A field-installed chilled water

pump interlock for each pump must be connected to each

pump’s interlock points on the Main Base Board. The Chilled

Water Pump 1 Interlock, CWP1, must be connected to MBB-

J7-1 and –2. The Chilled Water Pump 2 Interlock, CWP2, must

be connected to MBB-J7-3 and –4. The chilled water pump

interlock contacts should be rated for dry circuit application

capable of handling 5 vdc at 2 mA.

Cooler Pump Sequence of Operation — At any-

time the unit is in an ON status, as defined by the one of the

following conditions, the cooler pump relay will be enabled.

SINGLE INTEGRAL PUMP CONTROL — With a single

pump, the following options must be configured:

1. The Enable-Off-Remote Switch in ENABLE,

(CTRL=0).

• Cooler Pump Control (CPC) [Configuration, OPT1] ON.

• Cooler Pump 1 Enable (PM1E) [Configuration, UNIT]

YES.

2. Enable-Off-Remote Switch in REMOTE with

• Cooler Pump 2 Enable (PM2E) [Configuration, UNIT]

NO.

Start-Stop remote contact closure, (CTRL=0).

3. An Occupied Time Period from an Occupancy Schedule

in combination with items 1 or 2, (CTRL=2).

4. A SCN Start-Stop Command to Start in combination

with items 1 or 2, (CTRL=3).

As stated before, there are certain alarm conditions and

Operating Modes that will turn the cooler pump relay ON. This

sequence will describe the normal operation of the pump

control algorithm.

When the unit cycles from an “On” state to an “Off” state,

the cooler pump output will remain energized for the Cooler

Pump Shutdown Delay (PM.DY) [Configuration, OPT1]. This

is configurable from 0 to 10 minutes. The factory default is 1

minute. If the pump output was deenergized during the transi-

tion period, the pump output will not be energized.

NO INTEGRAL PUMP — SINGLE EXTERNAL PUMP

CONTROL — With a single external pump, the following

options must be configured:

With a single integral pump, the Cooler Pump Starter will

be energized when the machine is occupied. As part of the

factory-installed package, an auxiliary set of contacts is wired

to the MBB to serve as Chilled Water Pump Interlock. When

the mechanical cooling is called for, the pump interlock and

flow switch is checked. If the circuits are closed, the machine

starts its capacity routine. If the auxiliary contact interlock does

not close within 25 seconds of the ON command, a T190 —

Cooler Pump 1 Aux Contacts Failed to Close at Start-Up Alert

will be generated and the pump shut down. The unit will not

be allowed to start. If the chilled water flow switch does not

close within one (1) minute, two alarms will be generated. A

T192 — Cooler Pump 1 Failed to Provide Flow at Start-Up

Alert and an A200 – Cooler Flow/Interlock failed to close at

Start-Up will be generated and chiller will not be allowed to

start.

If the chilled water flow switch opens for at least 3 seconds

after initially being closed, a T196 — Flow Lost While Pump 1

Running Alert and an A201 — Cooler Flow/Interlock Contacts

• Cooler Pump Control (CPC) [Configuration, OPT1]

OFF.

Download from Www.Somanuals.com. All Manuals Search And Download.

Opened During Normal Operation Alarm will be generated

and the machine will stop.

will not be allowed to start. In either fault case listed above,

Pump 2 will be commanded to start once Pump 1 has failed.

If the control detects the chilled water pump interlock open

for 25 seconds after initially being closed, a T194 — Cooler

Pump 1 Contacts Opened During Normal Operation Alert is

generated and the unit is shut down.

If the control detects the chilled water flow switch circuit

closed for at least 5 minutes with the pump output OFF, an

A202 — Cooler Pump Interlock Closed When Pump is Off

Alarm will be generated and the unit will not be allowed to

start.

If the control detects that the chilled water pump auxiliary

contacts are closed for at least 25 seconds while the pump is

OFF, a T198 — Cooler Pump 1 Aux Contacts Closed While

Pump Off Alert is generated. The chiller will not be allowed to

start.

If the control starts a pump and the wrong interlock circuit

closes for at least 20 seconds, an A189 — Cooler Pump and

Aux Contact Input Miswire Alarm will be generated. The unit

will be prevented from starting.

If Pump 2 starts and the auxiliary contact interlock does

not close within 25 seconds of the ON command, a T191 —

Cooler Pump 2 Aux Contacts Failed to Close at Start-Up Alert

will be generated and the pump shut down. The unit will not be

allowed to start. If the chilled water flow switch does not close

within one (1) minute, two alarms will be generated. A T193

— Cooler Pump 2 Failed to Provide Flow at Start-Up Alert and

an A200 – Cooler Flow/Interlock failed to close at Start-Up

will be generated and chiller will not be allowed to start. In

either fault case listed above, Pump 1 will be commanded to

start once Pump 2 has failed.

If the chilled water flow switch opens for at least 3 seconds

after initially being closed, a T196 — Flow Lost While Pump 1

Running Alert or T197 — Flow Lost While Pump 2 Running

Alert for the appropriate pump and an A201 — Cooler Flow/

Interlock Contacts Opened During Normal Operation Alarm

will be generated and the machine will stop. If available, the

other pump will be started. If flow is proven, the machine will

be allowed to restart.

As part of a pump maintenance routine, the pump can be

started to maintain lubrication of the pump seal. To utilize this

function, Cooler Pmp Periodic Start (PM.P.S) [Configuration,

UNIT] must be set to YES. This option is set to NO as the fac-

tory default. With this feature enabled, if the pump is not oper-

ating, it will be started and operated for 2 seconds starting at

14:00 hours. If the pump is operating, this routine is skipped. If

the pump has failed and an Alarm/Alert condition is active, the

pump will not start that day.

If the chilled water pump interlock opens for 25 seconds

after initially being closed is detected by the control, the appro-

priate T194 – Cooler Pump 1 Contacts Opened During Normal

Operation Alert or T195 – Cooler Pump 2 Contacts Opened

During Normal Operation Alert is generated and the unit is

shut down. If available, the other pump will be started. If flow

is proven, the machine will be allowed to restart.

If the control detects that the chilled water flow switch

circuit is closed for at least 5 minutes with the pump output

OFF, an A202 – Cooler Pump Interlock Closed When Pump is

Off Alarm will be generated and the unit will not be allowed to

start.

If the control detects that the chilled water pump auxiliary

contacts are closed for at least 25 seconds while the pump is

OFF, the appropriate T198 – Cooler Pump 1 Aux Contacts

Closed While Pump Off or Alert T199 – Cooler Pump 2 Aux

Contacts Closed While Pump Off Alert is generated. The

chiller will not be allowed to start.

If the control starts a pump and the wrong interlock circuit

closes for at least 20 seconds, an A189 – Cooler Pump and Aux

Contact Input Miswire Alarm will be generated. The unit will

be prevented from starting.

The control will allow for pump changeover. Two methods

will change the pump sequence. Before the changeover can

occur, the unit must be at Capacity Stage 0. During changeover

the chilled water flow switch input is ignored for 10 seconds to

avoid a nuisance alarm.

With Cooler Pump Select (PM.SL) [Configuration, UNIT]

set to 0 (Automatic) and when the differential time limit Pump

Changeover Hours (PM.DT) [Configuration, UNIT] is reached,

the lead pump will be turned OFF. Approximately one (1) sec-

ond later, the lag pump will start. Manual changeover can be ac-

complished by changing Rotate Cooler Pump Now (ROT.P)

[Configuration, UNIT] to YES only if the machine is at Capac-

ity Stage 0 and the differential time limit Pump Changeover

Hours (PM.DT) [Configuration, UNIT] is reached. If the

PM.DT is not satisfied, the changeover will not occur. With the

machine at Capacity Stage 0, the pumps would rotate automati-

cally as part of the normal routine.

With Cooler Pump Select (PM.SL) [Configuration, UNIT]

set to 1 (Pump 1 Starts First) or 2 (Pump 2 Starts First), a manual

changeover can be accomplished by changing PM.SL only. The

machine Remote-Off-Enable Switch must be in the OFF posi-

tion to change this variable. The Rotate Cooler Pump Now

(ROT.P) [Configuration, UNIT] feature does not work for these

configuration options.

DUAL INTEGRAL PUMP CONTROL — With a dual inte-

gral pump package, the following options must be configured:

• Cooler Pump Control (CPC) [Configuration, OPT1] ON.

• Cooler Pump 1 Enable (PM1E) [Configuration, UNIT]

YES

• Cooler Pump 2 Enable (PM2E) [Configuration, UNIT]

YES

Pump Start Selection is a field-configurable choice. Cooler

Pump Select (PM.SL) [Configuration, UNIT] is factory de-

faulted to 0 (Automatic). This value can be changed to 1 (Pump

1 Starts First) or 2 (Pump 2 Starts First). If PM.SL is 0 (Auto-

matic), the pump selection is based on two criteria: the alert

status of a pump and the operational hours on the pump. If a

pump has an active Alert condition, it will not be considered

for the lead pump. The pump with the lowest operational hours

will be the lead pump. A pump is selected by the control to start

and continues to be the lead pump until the Pump Changeover

Hours (PM.DT) [Configuration, UNIT] is reached. The Lead

Pump (LD.PM) [Run Status, VIEW] indicates the pump that

has been selected as the lead pump: 1 (Pump 1), 2 (Pump 2), 3

(No Pump). The Pump Changeover Hours is factory defaulted

to 500 hours. Regardless of the Cooler Pump Selection, any

pump that has an active alert will not be allowed to start.

With the dual integral pump package, the Cooler Pump

Starter will be energized when the machine is in an occupied

period. As part of the factory-installed package, an auxiliary set

of contacts is wired to the MBB to serve as Chilled Water Pump

Interlock, one set for each pump to individual channels on the

MBB. With a call for mechanical cooling, the specific pump

interlock and flow switch are checked. If the circuits are closed,

the machine starts its capacity routine. If Pump 1 starts and the

auxiliary contact interlock does not close within 25 seconds of

the ON command, a T190 – Cooler Pump 1 Aux Contacts

Failed to Close at Start-Up Alert will be generated and the

pump shut down. The unit will not be allowed to start. If the

chilled water flow switch does not close within 1 minute, two

alarms will be generated. A T192 – Cooler Pump 1 Failed to

Provide Flow at Start-Up Alert and an A200 – Cooler Flow/

Interlock failed to close at Start-Up will be generated and chiller

Download from Www.Somanuals.com. All Manuals Search And Download.

As part of a pump maintenance routine, the pumps can be

started to maintain lubrication to the pump seal. To utilize this

function, Cooler Pmp Periodic Start (PM.P.S) [Configuration,

UNIT] must be set to YES. This option is set to NO as the fac-

tory default. If feature is enabled and the pump(s) are not

operating, then the pumps will be operated every other day for

2 seconds starting at 14:00 hours. If a pump has failed and has

an active Alert condition, it will not be started that day.

Dual chiller start/stop control is determined by configura-

tion of Control Method (CTRL) [Configuration, OPT2] of the

Master chiller. The Slave chiller should always be configured

for CTRL=0, Switch. If the chillers are to be controlled by

Remote Contacts, both Master and Slave chillers should be

enabled together. Two separate relays or one relay with

two sets of contacts may control the chillers. The Enable/Off/

Remote Contact switch should be in the Remote Contact

position on both the Master and Slave chillers. The Enable/Off/

Remote Contact switch should be in the Enable position for

CTRL=2, Occupancy or CTRL=3, SCN Control.

Both chillers will stop if the Master chiller Enable/Off/

Remote Contact switch is in the Off position. If the Emergency

Stop switch is turned off or an alarm is generated on the Master

chiller the Slave chiller will operate in a Stand-Alone mode.

If the Emergency Stop switch is turned off or an alarm is

generated on the Slave chiller the Master chiller will operate in

a Stand-Alone mode.

Configuring and Operating Dual Chiller Con-

trol — The dual chiller routine is available for the control of

two units supplying chilled fluid on a common loop. This

control algorithm is designed for parallel fluid flow arrangement

only. One chiller must be configured as the master chiller, the

other as the slave. An additional leaving fluid temperature

thermistor (Dual Chiller LWT) must be installed as shown in

Fig. 17 and connected to the master chiller. Refer to Sensors sec-

tion, page 4, for wiring. The SCN communication bus must be

connected between the two chillers. Connections can be made

to the SCN screw terminals on TB3. Refer to Sterlco Comfort

Network Interface section, page 3, for wiring information.

The master chiller controls the slave chiller by changing its

Control Mode (STAT) [Run Status, VIEW] and its operating

setpoint or Control Point (CTPT) [Run Status, VIEW].

Refer to Table 21 for dual chiller configuration. In this

example the master chiller will be configured at address 1 and

the slave chiller at address 2. The master and slave chillers

must reside on the same SCN bus (SCNB) but cannot have the

same SCN address (SCNA) [Configuration, OPT2]. Both

master and slave chillers must have Lead/Lag Chiller Enable

(LLEN) [Configuration, RSET] configured to ENBL. Master/

Slave Select (MSSL) [Configuration, RSET] must be config-

ured to MAST for the master chiller and SLVE for the slave.

Also in this example, the master chiller will be configured to

use Lead/Lag Balance Select (LLBL) and Lead/Lag Balance

Delta (LLBD) [Configuration, RSET] to even out the chiller

run-times weekly. The Lag Start Delay (LLDY) [Configura-

tion, RSET] feature will be set to 10 minutes. This will prevent

the lag chiller from starting until the lead chiller has been at

100% capacity for the length of the delay time. Parallel config-

uration (PARA) [Configuration, RSET] can only be config-

ured to YES. The variables LLBL, LLBD and LLDY are not

used by the slave chiller.

THERMISTOR

WIRING*

LEAVING

FLUID

MASTER

CHILLER

RETURN

FLUID

SLAVE

CHILLER

INSTALL DUAL CHILLER LWT

LEAVING FLUID TEMPERATURE

THERMISTOR (T10) HERE

*Depending on piping sizes, use either:

• HH79NZ014 sensor/10HB50106801 well (3-in. sensor/well)

• HH79NZ029 sensor/10HB50106802 well (4-in. sensor/well)

Fig. 17 — Dual Chiller Thermistor Location

Table 9 — Marquee Display Menu Structure*

RUN

STATUS

SERVICE

TEST

SET

POINTS

TIME

CLOCK

OPERATING

MODES

MODE

TEMPERATURES PRESSURES

INPUTS OUTPUTS CONFIGURATION

ALARMS

Manual

Mode

On/Off

(TEST)

Auto

Display

(VIEW)

Unit

Temperatures

(UNIT)

Ckt A

Pressures

(PRC.A)

Unit

Discrete

(GEN.I)

Unit

Discrete

(GEN.O)

Cooling

(COOL)

Display

(DISP)

Unit Time

(TIME)

Modes

(MODE)

Current

(CRNT)

Machine

Hours/Starts

(RUN)

Unit

Outputs

(OUTS)

Ckt A

Temperatures

(CIR.A)

Ckt B

Pressures

(PRC.B)

Head

Pressure

(HEAD)

Reset

Alarms

(RCRN)

Ckt A/B

(CRCT)

Ckt A

(CIR.A)

Machine

(UNIT)

Unit Date

(DATE)

Brine

Freeze-

point

Daylight

Saving

Time

Compressor Ckt A Comp

Ckt B

Temperatures

(CIR.B)

Unit

Analog

(4-20)

Alarm

History

(HIST)

Ckt B

(CIR.B)

Options 1

(OPT1)

Run Hours

(HOUR)

Tests

(CMPA)

(FRZ)

(DST)

Compressor Ckt B Comp

Schedule

Number

(SCH.N)

Options 2

(OPT2)

Starts

Tests

SUB-MODE

(STRT)

(CMPB)

Temperature

Reset

(RSET)

Local

Schedule

(SCH.L)

Pump Maint.

(PM)

Software

Version

(VERS)

Set Point

Select

(SLCT)

Schedule

Override

(OVR)

Service

Configuration

(SERV)

Broadcast

Configuration

(BCST)

LEGEND

For example, using the language selection item:

Language Selection (LANG) [Configuration, DISP]

Ckt — Circuit

*Throughout this text, the location of items in the menu structure will be

described in the following format:

Item Expansion (ITEM) [Mode Name, Sub-mode Name]

Download from Www.Somanuals.com. All Manuals Search And Download.

Table 10 — Run Status Mode and Sub-Mode Directory

KEYPAD

ENTRY

ITEM

DISPLAY SUB-ITEM DISPLAY SUB-ITEM DISPLAY

EXPANSION

SUB-MODE

VIEW

ITEM

COMMENT

ENTER

EWT

XXX.X °F

ENTERING FLUID TEMP

LEAVING FLUID TEMP

ACTIVE SETPOINT

CONTROL POINT

LWT

XXX.X °F

SETP XXX.X °F

CTPT XXX.X °F

LOD.F

STAT

XXX

LOAD/UNLOAD FACTOR

CONTROL MODE

0 = Service Test

1 = Off Local

2 = Off SCN

3 = Off Time

4 = Off Emrgcy

5 = On Local

6 = On SCN

7 = On Time

8 = Ht Enabled

9 = Pump Delay

LD.PM

OCC

LEAD PUMP

OCCUPIED

YES/NO

LS.AC

LOW SOUND ACTIVE

OVERRIDE MODES IN EFFECT

PERCENT TOTAL CAPACITY

REQUESTED STAGE

CURRENT ALARMS & ALERTS

TIME OF DAY

MODE YES/NO

CAP

STGE

ALRM

TIME

XXX %

XXX

XX.XX

00.00-23.59

1 = January, 2 = February, etc.

01-31

MNTH

DATE

YEAR

MONTH OF YEAR

DAY OF MONTH

YEAR OF THE CENTURY

MACHINE OPERATING HOURS

MACHINE STARTS

RUN

ENTER

HRS.U XXXX HRS

STR.U

HR.P1

HR.P2

XXXX

XXXX.X

PUMP 1 RUN HOURS

PUMP 2 RUN HOURS

CIRCUIT A RUN HOURS

HOUR

ENTER

HRS.A XXXX HRS

HRS.B XXXX HRS

HR.A1 XXXX HRS

HR.A2 XXXX HRS

HR.B1 XXXX HRS

HR.B2 XXXX HRS

CIRCUIT B RUN HOURS

See Note

COMPRESSOR A1 RUN HOURS

COMPRESSOR A2 RUN HOURS

COMPRESSOR B1 RUN HOURS

COMPRESSOR B2 RUN HOURS

COMPRESSOR A1 STARTS

COMPRESSOR A2 STARTS

COMPRESSOR B1 STARTS

COMPRESSOR B2 STARTS

PUMP MAINTENANCE

See Note

STRT

ENTER

ST.A1

ST.A2

ST.B1

ST.B2

PUMP

XXXX

See Note

ENTER

SI.PM

P.1.DN

P.2.DN

P.1.MN

P.2.MN

XXXX HRS

YES/NO

PUMP SERVICE INTERVAL

PUMP 1 SERVICE COUNTDOWN

PUMP 2 SERVICE COUNTDOWN

PUMP 1 MAINTENANCE DONE

PUMP 2 MAINTENANCE DONE

User Entry

YES/NO

NOTE: If the unit has a single circuit, the Circuit B items will not appear in the display, except the ability to configure circuit B will be displayed.

Download from Www.Somanuals.com. All Manuals Search And Download.

Table 10 — Run Status Mode and Sub-Mode Directory (cont)

KEYPAD

ENTRY

ITEM

DISPLAY SUB-ITEM DISPLAY SUB-ITEM DISPLAY

EXPANSION

SUB-MODE

PM (cont)

ITEM

COMMENT

PMDT

PUMP MAINTENANCE DATES

ENTER

P.1.M0

P.1.M1

P.1.M2

P.1.M3

P.1.M4

P.2.M0

P.2.M1

P.2.M2

P.2.M3

P.2.M4

MM/DD/YY HH:MM

ENTER

STRN

STRAINER MAINTENANCE

STRAINER SRVC INTERVAL

STRAINER SRVC COUNTDOWN

STRAINER MAINT. DONE

STRAINER MAINT. DATES

MM/DD/YY HH:MM

SI.ST

S.T.DN

S.T.MN

ST.DT

XXXX HRS

YES/NO

User Entry

ENTER

S.T.M0

S.T.M1

S.T.M2

S.T.M3

S.T.M4

MM/DD/YY HH:MM

ENTER

COIL

COIL MAINTENANCE

COIL SRVC INTER

SI.CL

C.L.DN

C.L.MN

CL.DT

XXXX HRS

YES/NO

COIL SERVICE COUNTDOWN

COIL MAINT. DONE

COIL MAINTENANCE DATES

MM/DD/YY HH:MM

User Entry

ENTER

C.L.M0

C.L.M1

C.L.M2

C.L.M3

C.L.M4

MM/DD/YY HH:MM

VERS

ENTER

MBB

MARQ

EMM

NAVI

CESR-131279-xx-xx

CESR-131171-xx-xx

CESR-131174-xx-xx

CESR-131227-xx-xx

xx-xx is Version number*

*Press

ENTER

and

ESCAPE

simultaneously to obtain version number.

Download from Www.Somanuals.com. All Manuals Search And Download.

Table 11 — Service Test Mode and Sub-Mode Directory

KEYPAD

ENTRY

ITEM

SUB-MODE

TEST

ITEM

DISPLAY

COMMENT

EXPANSION

ON/OFF

SERVICE TEST MODE

To Enable Service Test Mode,

move Enable/Off/Remote

Contact switch to OFF. Change

TEST to ON. Move switch to

ENABLE.

ENTER

OUTS

OUTPUTS AND PUMPS

FAN 1 RELAY

ENTER

FAN1

FAN2

CLP.1

CLP.2

CL.HT

RMT.A

ON/OFF

FAN 2 RELAY

COOLER PUMP 1 RELAY

COOLER PUMP 2 RELAY

COOLER/PUMP HEATER

REMOTE ALARM RELAY

CMPA

CMPB

CIRCUIT A COMPRESSOR TEST

COMPRESSOR A1 RELAY

ENTER

CC.A1

CC.A2

MLV

ON/OFF

COMPRESSOR A2 RELAY

MINIMUM LOAD VALVE RELAY

CIRCUIT B COMPRESSOR TEST

COMPRESSOR B1 RELAY

See Note

ENTER

CC.B1

CC.B2

MLV

ON/OFF

COMPRESSOR B2 RELAY

MINIMUM LOAD VALVE RELAY

NOTE: If the unit has a single circuit, the Circuit B items will not appear in the display, except the ability to configure circuit B will be displayed.

Table 12 — Temperature Mode and Sub-Mode Directory

KEYPAD

ENTRY

ITEM

SUB-MODE

UNIT

ITEM

DISPLAY

COMMENT

EXPANSION

ENT AND LEAVE UNIT TEMPS

ENTER

CEWT

CLWT

OAT

XXX.X °F

COOLER ENTERING FLUID

COOLER LEAVING FLUID

OUTSIDE AIR TEMPERATURE

SPACE TEMPERATURE

SPT

DLWT

LEAD/LAG LEAVING FLUID

CIR.A

TEMPERATURES CIRCUIT A

ENTER

SCT.A

SST.A

RGT.A

SH.A

SATURATED CONDENSING TMP

XXX.X °F

XXX.X ^F

SATURATED SUCTION TEMP

COMPR RETURN GAS TEMP

SUCTION SUPERHEAT TEMP

CIR.B

TEMPERATURES CIRCUIT B

See Note

ENTER

SCT.B

SST.B

RGT.B

SH.B

SATURATED CONDENSING TMP

XXX.X °F

XXX.X ^F

SATURATED SUCTION TEMP

COMPR RETURN GAS TEMP

SUCTION SUPERHEAT TEMP

See Note

NOTE: If the unit has a single circuit, the Circuit B items will not appear in the display, except the ability to configure circuit B will be displayed.

Download from Www.Somanuals.com. All Manuals Search And Download.

Table 13 — Pressure Mode and Sub-Mode Directory

KEYPAD

ENTRY

ITEM

SUB-MODE

PRC.A

ITEM

DISPLAY

COMMENT

EXPANSION

PRESSURES CIRCUIT A

ENTER

DP.A

SP.A

XXX.X PSIG

DISCHARGE PRESSURE

SUCTION PRESSURE

PRC.B

PRESSURES CIRCUIT B

DISCHARGE PRESSURE

See Note

ENTER

DP.B

SP.B

XXX.X PSIG

SUCTION PRESSURE

See Note

NOTE: If the unit has a single circuit, the Circuit B items will not appear in the display, except the ability to configure circuit B will be displayed.

Table 14 — Set Point and Sub-Mode Directory

KEYPAD

ENTRY

ITEM

SUB-MODE

COOL

ITEM

DISPLAY

COMMENT

EXPANSION

COOLING SETPOINTS

ENTER

CSP.1

CSP.2

CSP.3

XXX.X °F

COOLING SETPOINT 1

Default: 44 F

Default: 32 F

COOLING SETPOINT 2

ICE SETPOINT

HEAD

FRZ

HEAD PRESSURE SETPOINTS

CALCULATED HP SETPOINT A

Default: 113 F

(Read Only)

ENTER

HD.P.A

HD.P.B

XXX.X °F

Default: 113 F

(Read Only)

XXX.X °F

CALCULATED HP SETPOINT B

BRINE FREEZE SETPOINT

BRINE FREEZE POINT

ENTER

BR.FZ

Default: 34 F

XXX.X °F

Table 15 — Inputs Mode and Sub-Mode Directory

KEYPAD

ENTRY

ITEM

SUB-MODE

GEN.I

ITEM

DISPLAY

COMMENT

EXPANSION

GENERAL INPUTS

ENTER

STST

FLOW

PM.F.1

STRT/STOP

ON/OFF

START/STOP SWITCH

COOLER FLOW SWITCH

COOLER PUMP 1 INTERLOCK

OPEN/CLSE

1 = Pump 1

2 = Pump 2

3 = No Pump

LD.PM

Lead Pump

PM.F.2

HT.RQ

DLS1

DLS2

ICED

OPEN/CLSE

ON/OFF

COOLER PUMP 2 INTERLOCK

HEAT REQUEST

DEMAND LIMIT SWITCH 1

DEMAND LIMIT SWITCH 2

ICE DONE

DUAL

DUAL SETPOINT SWITCH

CRCT

CIRCUITS INPUTS

ENTER

FKA1

FKA2

FKB1

FKB2

ON/OFF

COMPRESSOR A1 FEEDBACK

COMPRESSOR A2 FEEDBACK

COMPRESSOR B1 FEEDBACK

COMPRESSOR B2 FEEDBACK

See Note

4-20

4-20 MA INPUTS

ENTER

DMND

RSET

CSP

XX.X MA

4-20 MA DEMAND SIGNAL

4-20 MA RESET SIGNAL

4-20 MA COOLING SETPOINT

Download from Www.Somanuals.com. All Manuals Search And Download.

Table 16 — Outputs Mode and Sub-Mode Directory

KEYPAD

ENTRY

ITEM

SUB-MODE

GEN.O

ITEM

DISPLAY

COMMENT

EXPANSION

GENERAL OUTPUTS

ENTER

FAN1

FAN2

ON/OFF

FAN 1 RELAY

FAN 2 RELAY

C.WP1

C.WP2

CLHT

MLV.R

COOLER PUMP RELAY 1

COOLER PUMP RELAY 2

COOLER/PUMP HEATER

MINIMUM LOAD VALVE RELAY

CIR.A

CIR.B

OUTPUTS CIRCUIT A

ENTER

CC.A1

CC.A2

ON/OFF

COMPRESSOR A1 RELAY

COMPRESSOR A2 RELAY

OUTPUTS CIRCUIT B

See Note

CC.B1

CC.B2

ON/OFF

COMPRESSOR B1 RELAY

COMPRESSOR B2 RELAY

NOTE: If the unit has a single circuit, the Circuit B items will not appear in the display, except the ability to configure circuit B will be displayed.

Table 17 — Configuration Mode and Sub-Mode Directory

KEYPAD

ENTRY

ITEM

SUB-MODE

DISP

ITEM

DISPLAY

COMMENT

EXPANSION

DISPLAY CONFIGURATION

ENTER

TEST

ON/OFF

TEST DISPLAY LEDS

METR

LANG

ON/OFF

METRIC DISPLAY

Off = English; On = Metric

LANGUAGE SELECTION

Default: 0

0 = English

1 = Espanol

2 = Francais

3 = Portuguese

PAS.E

PASS

ENBL/DSBL

xxxx

PASSWORD ENABLE

SERVICE PASSWORD

UNIT

ENTER

UNIT CONFIGURATION

COMPRESSOR A1 SIZE

SZA.1

Unit Size

60 Hz

50 Hz

010

015

018

022

025

030

032

035

040

042

045

050

055

—

SZA.2

COMPRESSOR A2 SIZE

Unit Size

60 Hz

50 Hz

015

018

022

025

030

032

035

040

042

045

050

055

—

SZB.1

COMPRESSOR B1 SIZE

Unit Size

60 Hz

50 Hz

032

035

040

042

045

050

055

—

SZB.2

SH.SP

COMPRESSOR B2 SIZE

SUPERHEAT SETPOINT

Unit Size

60 Hz

50 Hz

042

045

050

055

—

XX.X ∆F

Default: 15 °F

REFG

FAN.S

REFRIGERANT

1 = R-22

FAN STAGING SELECT

1 = One Fan (010-018)

2 = Two Fans (022-030)

3 = Three Fans (032-040)

4 = Four Fans (042-055)

NOTE: If the unit has a single circuit, the Circuit B items will not appear in the display, except the ability to configure circuit B will be displayed.

Download from Www.Somanuals.com. All Manuals Search And Download.

Table 17 — Configuration Mode and Sub-Mode Directory (cont)

KEYPAD

ITEM

SUB-MODE

OPT1

ITEM

DISPLAY

COMMENT

ENTRY

EXPANSION

UNIT OPTIONS 1 HARDWARE

COOLER FLUID

FLUD

Default: Water

ENTER

1 = Water

2 = Medium Temperature Brine

MLV.S

MMR.S

RG.EN

CPC

YES/NO

MINIMUM LOAD VALVE SELECT

MOTORMASTER SELECT

ENBL/DSBL

ON/OFF

RETURN GAS SENSOR ENABLE

COOLER PUMP CONTROL

COOLER PUMP 1 ENABLE

COOLER PUMP 2 ENABLE

Default: DISABLED

Default: On

PM1E

PM2E

YES/NO

PM.P.S

PM.SL

YES/NO

COOLER PMP PERIODIC STRT

COOLER PUMP SELECT

Default: No

Default: Automatic

0 = Automatic

1 = Pump 1 Starts first

2 = Pump 2 Starts first

PM.DY

PM.DT

ROT.P

EMM

XX MIN

XXXX HRS

YES/NO

COOLER PUMP SHUTDOWN DLY

PUMP CHANGEOVER HOURS

ROTATE COOLER PUMPS NOW

EMM MODULE INSTALLED

0 to 10 minutes, Default: 1 min.

Default: 500 hours

User Entry

YES/NO

OPT2

UNIT OPTIONS 2 CONTROLS

CONTROL METHOD

CTRL

Default: Switch

ENTER

0 = Enable/Off/Remote Switch

2 = Occupancy

3 = SCN Control

Default: 1

Range: 1 to 239

SCNA

XXX

SCN ADDRESS

Default: 0

SCNB

XXX

SCN BUS NUMBER

Range: 0 to 239

BAUD

SCN BAUD RATE

Default: 9600

1 = 2400

2 = 4800

3 = 9600

4 = 19,200

5 = 38,400

LOAD

LLCS

LOADING SEQUENCE SELECT

LEAD/LAG CIRCUIT SELECT

Default: Equal

1 = Equal

2 = Staged

Default: Automatic

1 = Automatic

2 = Circuit A Leads

3 = Circuit B Leads

Default: 60

LCWT

DELY

XX.X ∆F

HIGH LCW ALERT LIMIT

MINUTES OFF TIME

Range: 2 to 60

Default: 0 Minutes

Range: 0 to 15 Minutes

ICE.M

CLS.C

LS.MD

ENBL/DSBL

ICE MODE ENABLE

Default: Disable

CLOSE CONTROL SELECT

LOW SOUND MODE SELECT

Default: 0

0 = Mode Disable

1 = Fan Noise Only

2 = Fan/Compressor Noise

LS.ST

LS.ND

LS.LT

00:00

LOW SOUND START TIME

LOW SOUND END TIME

Default: 00:00

Default: 100%

Range: 0 to 100%

XXX %

LOW SOUND CAPACITY LIMIT

RSET

RESET COOL TEMP

CRST

COOLING RESET TYPE

Default: No Reset

0 = No Reset

ENTER

1 = 4 to 20 mA Input

2 = Outdoor Air Temperature

3 = Return Fluid

4 = Space Temperature

∆

Default: 0.0

MA.DG

RM.NO

XX.X ∆F

4-20 - DEGREES RESET

∆

Range: –30 to 30

Default: 125 F (51.7 C)

Range: 0° to 125 F

XXX.X °F

REMOTE - NO RESET TEMP

Download from Www.Somanuals.com. All Manuals Search And Download.

Table 17 — Configuration Mode and Sub-Mode Directory (cont)

KEYPAD

ENTRY

ITEM

SUB-MODE

RSET (cont)

ITEM

DISPLAY

COMMENT

Default: 0.0 F (-17.8 C)

EXPANSION

RM.F

XXX.X °F

REMOTE - FULL RESET TEMP

Range:

to 125 F

Default: 0.0

RM.DG

RT.NO

RT.F

XX.X °F

XXX.X ∆F

REMOTE - DEGREES RESET

RETURN - NO RESET TEMP

RETURN - FULL RESET TEMP

Range: –30 to 30 F

∆

Default: 10.0 F (5.6 C)

∆

Range:

to 125 F COOLER

∆

Default: 0.0 F (0.0 C)

Range:

to 125 F COOLER

Default: 0.0

RT.DG

DMDC

XX.X °F

RETURN - DEGREES RESET

DEMAND LIMIT SELECT

Range: –30 to 30 F (–34.4 to -1.1 C)

Default: None

0 = None

1 = Switch

2 = 4 to 20 mA Input

3 = SCN Loadshed

Default: 100%

DM20

SHNM

SHDL

SHTM

DLS1

DLS2

LLEN

MSSL

XXX %

XXX

DEMAND LIMIT AT 20 MA

LOADSHED GROUP NUMBER

LOADSHED DEMAND DELTA

MAXIMUM LOADSHED TIME

DEMAND LIMIT SWITCH 1

DEMAND LIMIT SWITCH 2

LEAD/LAG CHILLER ENABLE

MASTER/SLAVE SELECT

Range: 0 to 100%

Default: 0

Range: 0 to 99

Default: 0%

Range: 0 to 60%

XXX %

Default: 60 minutes

Range: 0 to 120 minutes

XXX

Default: 80%

Range: 0 to 100%

XXX %

Default: 50%

Range: 0 to 100%

XXX %

ENBL/DSBL

SLVE/MAST

Default: Disable

Default: Master

Default: 2

SLVA

LLBL

XXX

SLAVE ADDRESS

Range: 0 to 239

LEAD/LAG BALANCE SELECT

Default: Master Leads

0 = Master Leads

1 = Slave Leads

2 = Automatic

ENTER

Default: 168 hours

LLBD

LLDY

PARA

XXX

YES

LEAD/LAG BALANCE DELTA

LAG START DELAY

Range: 40 to 400 hours

Default: 5 minutes

Range: 0 to 30 minutes

PARALLEL CONFIGURATION

Default: YES (CANNOT BE CHANGED)

SLCT

SETPOINT AND RAMP LOAD

COOLING SETPOINT SELECT

CLSP

Default: Single

0 = Single

1 = Dual Switch

2 = Dual SCN Occupied

3 = 4 to 20 mA Input (requires

EMM)

ENTER

RL.S

CRMP

SCHD

Z.GN

ENBL/DSBL

RAMP LOAD SELECT

COOLING RAMP LOADING

SCHEDULE NUMBER

Default: Enable

Default: 1.0

Range: 0.2 to 2.0

X.X

Default: 1

Range: 1 to 99

Default: 2.0

Range: 1.0 to 4.0

X.X

DEADBAND MULTIPLIER

SERV

SERVICE CONFIGURATION

ENABLE COMPRESSOR A1

ENTER

EN.A1

EN.A2

EN.B1

EN.B2

ENBL/DSBL

Unit dependent

ENABLE COMPRESSOR A2

ENABLE COMPRESSOR B1

ENABLE COMPRESSOR B2

BCST

BROADCAST CONFIGURATION

ENTER

T.D.BC

OAT.B

ON/OFF

SCN TIME/DATE BROADCAST

SCN OAT BROADCAST

GLOBAL SCHEDULE BROADCAST

SCN BROADCAST ACK’ER

G.S.BC

BC.AK

Download from Www.Somanuals.com. All Manuals Search And Download.

Table 18 — Time Clock Mode and Sub-Mode Directory

KEYPAD

ENTRY

ITEM

SUB-MODE

TIME

ITEM

DISPLAY

SUB-ITEM

DISPLAY

COMMENT

EXPANSION

TIME OF DAY

ENTER

HH.MM

XX.XX

HOUR AND MINUTE

Military (00:00 – 23:59)

DATE

MONTH,DATE,DAY AND YEAR

MONTH OF YEAR

ENTER

MNTH

DOM

DAY

1-12 (1 = January, 2 = February, etc)

Range: 01-31

DAY OF MONTH

DAY OF WEEK

1-7 (1 = Sunday, 2 = Monday, etc)

YEAR

XXXX

YEAR OF CENTURY

DST

DAYLIGHT SAVINGS TIME

MONTH

ENTER

STR.M

STR.W

STR.D

MIN.A

STP.M

STP.W

STP.D

MIN.5

Default: 4, Range 1 – 12

Default: 1, Range 1 – 5

Default: 7, Range 1 – 7

Default: 60, Range 0 – 99

Default: 10, Range 1 – 12

Default: 5, Range 1 – 5

Default: 7, Range 1 – 7

WEEK

DAY

MINUTES TO ADD

MONTH

WEEK

DAY

MINUTES TO SUBTRACT

Default: 60, Range 0 – 99

SCH.N

SCH.L

SCHEDULE NUMBER

Default: 1, Range 1 – 99

LOCAL OCCUPANCY SCHEDULE

ENTER

PER.1

OCCUPANCY PERIOD 1

PERIOD OCCUPIED TIME

PERIOD UNOCCUPIED TIME

MONDAY IN PERIOD

OCC.1

UNC.1

MON.1

TUE.1

WED.1

THU.1

FRI.1

XX:XX

XX.XX

Military (00:00 – 23:59)

YES/NO

TUESDAY IN PERIOD

WEDNESDAY IN PERIOD

THURSDAY IN PERIOD

FRIDAY IN PERIOD

SAT.1

SATURDAY IN PERIOD

SUNDAY IN PERIOD

SUN.1

HOL.1

HOLIDAY IN PERIOD

ENTER

PER.2

OCCUPANCY PERIOD 2

PERIOD OCCUPIED TIME

PERIOD UNOCCUPIED TIME

MONDAY IN PERIOD

OCC.2

UNC.2

MON.2

TUE.2

WED.2

THU.2

FRI.2

XX:XX

XX.XX

Military (00:00 – 23:59)

YES/NO

TUESDAY IN PERIOD

WEDNESDAY IN PERIOD

THURSDAY IN PERIOD

FRIDAY IN PERIOD

SAT.2

SATURDAY IN PERIOD

SUNDAY IN PERIOD

SUN.2

HOL.2

HOLIDAY IN PERIOD

Download from Www.Somanuals.com. All Manuals Search And Download.

Table 18 — Time Clock Mode and Sub-Mode Directory (cont)

KEYPAD

ENTRY

ITEM

EXPANSION

SUB-MODE

ITEM

DISPLAY

SUB-ITEM

DISPLAY

COMMENT

SCH.L (cont)

ENTER

PER.3

OCCUPANCY PERIOD 3

ENTER

OCC.3

UNC.3

MON.3

TUE.3

WED.3

THU.3

FRI.3

XX:XX

XX.XX

PERIOD OCCUPIED TIME

PERIOD UNOCCUPIED TIME

MONDAY IN PERIOD

Military (00:00 – 23:59)

YES/NO

TUESDAY IN PERIOD

WEDNESDAY IN PERIOD

THURSDAY IN PERIOD

FRIDAY IN PERIOD

SAT.3

SATURDAY IN PERIOD

SUNDAY IN PERIOD

SUN.3

HOL.3

HOLIDAY IN PERIOD

ENTER

PER.4

PER.5

PER.6

OCCUPANCY PERIOD 4

PERIOD OCCUPIED TIME

PERIOD UNOCCUPIED TIME

MONDAY IN PERIOD

OCC.4

UNC.4

MON.4

TUE.4

WED.4

THU.4

FRI.4

XX:XX

XX.XX

Military (00:00 – 23:59)

YES/NO

TUESDAY IN PERIOD

WEDNESDAY IN PERIOD

THURSDAY IN PERIOD

FRIDAY IN PERIOD

SAT.4

SATURDAY IN PERIOD

SUNDAY IN PERIOD

SUN.4

HOL.4

HOLIDAY IN PERIOD

ENTER

OCCUPANCY PERIOD 5

PERIOD OCCUPIED TIME

PERIOD UNOCCUPIED TIME

MONDAY IN PERIOD

OCC.5

UNC.5

MON.5

TUE.5

WED.5

THU.5

FRI.5

XX:XX

XX.XX

Military (00:00 – 23:59)

YES/NO

TUESDAY IN PERIOD

WEDNESDAY IN PERIOD

THURSDAY IN PERIOD

FRIDAY IN PERIOD

SAT.5

SATURDAY IN PERIOD

SUNDAY IN PERIOD

SUN.5

HOL.5

HOLIDAY IN PERIOD

ENTER

OCCUPANCY PERIOD 6

PERIOD OCCUPIED TIME

PERIOD UNOCCUPIED TIME

MONDAY IN PERIOD

OCC.6

UNC.6

MON.6

TUE.6

WED.6

XX:XX

XX.XX

Military (00:00 – 23:59)

YES/NO

TUESDAY IN PERIOD

WEDNESDAY IN PERIOD

Download from Www.Somanuals.com. All Manuals Search And Download.

Table 18 — Time Clock Mode and Sub-Mode Directory (cont)

KEYPAD

ENTRY

ITEM

EXPANSION

SUB-MODE

ITEM

DISPLAY

SUB-ITEM

DISPLAY

COMMENT

SCH.L (cont)

THU.6

YES/NO

THURSDAY IN PERIOD

FRI.6

SAT.6

YES/NO

FRIDAY IN PERIOD

SATURDAY IN PERIOD

SUNDAY IN PERIOD

SUN.6

HOL.6

HOLIDAY IN PERIOD

OCCUPANCY PERIOD 7

PERIOD OCCUPIED TIME

PERIOD UNOCCUPIED TIME

MONDAY IN PERIOD

ENTER

PER.7

OCC.7

UNC.7

MON.7

TUE.7

WED.7

THU.7

FRI.7

XX:XX

XX.XX

Military (00:00 – 23:59)

YES/NO

TUESDAY IN PERIOD

WEDNESDAY IN PERIOD

THURSDAY IN PERIOD

FRIDAY IN PERIOD

SAT.7

SATURDAY IN PERIOD

SUNDAY IN PERIOD

SUN.7

HOL.7

HOLIDAY IN PERIOD

OCCUPANCY PERIOD 8

PERIOD OCCUPIED TIME

PERIOD UNOCCUPIED TIME

MONDAY IN PERIOD

ENTER

PER.8

OCC.8

UNC.8

MON.8

TUE.8

WED.8

THU.8

FRI.8

XX:XX

XX.XX

Military (00:00 – 23:59)

YES/NO

TUESDAY IN PERIOD

WEDNESDAY IN PERIOD

THURSDAY IN PERIOD

FRIDAY IN PERIOD

SAT.8

SATURDAY IN PERIOD

SUNDAY IN PERIOD

SUN.8

HOL.8

HOLIDAY IN PERIOD

OVR

SCHEDULE OVERRIDE

ENTER

OVR.T

OVR.L

T.OVR

TIMED OVERRIDE HOURS

Default: 0, Range 0-4 hours

User Entry

OVERRIDE TIME LIMIT

TIMED OVERRIDE

YES/NO

Download from Www.Somanuals.com. All Manuals Search And Download.

Table 19 — Operating Mode and Sub-Mode Directory

KEYPAD

ENTRY

ITEM

SUB-MODE

MODE

ITEM

DISPLAY

COMMENT

EXPANSION

MODES CONTROLLING UNIT

ENTER

MD01

MD02

MD03

MD05

MD06

MD07

MD08

MD09

MD10

MD13

MD14

MD15

MD16

MD17

MD18

MD19

MD20

MD21

MD22

MD23

MD24

MD25

MD26

ON/OFF

FSM CONTROLLING CHILLER

WSM CONTROLLING CHILLER

MASTER/SLAVE CONTROL

RAMP LOAD LIMITED

TIMED OVERRIDE IN EFFECT

LOW COOLER SUCTION TEMPA

LOW COOLER SUCTION TEMPB

SLOW CHANGE OVERRIDE

MINIMUM OFF TIME ACTIVE

DUAL SETPOINT

TEMPERATURE RESET

DEMAND/SOUND LIMITED

COOLER FREEZE PROTECTION

LOW TEMPERATURE COOLING

HIGH TEMPERATURE COOLING

MAKING ICE

STORING ICE

HIGH SCT CIRCUIT A

HIGH SCT CIRCUIT B

MINIMUM COMP ON TIME

PUMP OFF DELAY TIME

LOW SOUND MODE

SHORT LOOP OVERRIDE

LEGEND

FSM

SCT

WSM

—

Flotronic™ System Manager

Saturated Condensing Temperature

Water System Manager

Table 20 — Alarms Mode and Sub-Mode Directory

KEYPAD

ENTRY

ITEM

SUB-MODE

CRNT

ITEM

COMMENT

EXPANSION

Alarms are shown as AXXX.

Alerts are shown as TXXX.

ENTER

AXXX OR TXXX

YES/NO

CURRENTLY ACTIVE ALARMS

RESET ALL CURRENT ALARMS

ALARM HISTORY

RCRN

HIST

Alarms are shown as AXXX.

Alerts are shown as TXXX.

AXXX OR TXXX

Download from Www.Somanuals.com. All Manuals Search And Download.

Table 21 — Dual Chiller Configuration (Master Chiller Example)

SUB-MODE

ITEM

KEYPAD ENTRY

DISPLAY

ITEM EXPANSION

COMMENTS

DISP

UNIT

OPT1

OPT2

ENTER

ESCAPE

ENTER

ESCAPE

CTRL

CONTROL METHOD

SWITCH

CTRL

SCNA

SCNB

DEFAULT 0

DEFAULT 1

DEFAULT 0

CTRL

SCNA

SCN ADDRESS

SCNA

SCNB

ENTER

ESCAPE

SCN BUS NUMBER

SCNB

OPT2

RSET

CRST

LLEN

DSBL

ENBL

LLEN

MSSL

MAST

MSSL

SLVA

PROCEED TO

SUBMODE RESET

RSET

ENTER

COOLING RESET TYPE

LEAD/LAG CHILLER ENABLE

15 ITEMS

SCROLLING STOPS

VALUE FLASHES

SELECT ENBL

LLEN

MSSL

SLVA

LLBL

ENTER

LEAD/LAG CHILLER ENABLE

CHANGE ACCEPTED

ESCAPE

MASTER /SLAVE SELECT

ENTER

DEFAULT MAST

ESCAPE

SLAVE ADDRESS

ENTER

SCROLLING STOPS

VALUE FLASHES

SELECT 2

ENTER

SLAVE ADDRESS

CHANGE ACCEPTED

ESCAPE

SLVA

LLBL

LEAD/LAG BALANCE SELECT

ENTER

SCROLLING STOPS

VALUE FLASHES

SELECT 2 - Automatic

Download from Www.Somanuals.com. All Manuals Search And Download.

Table 21 — Dual Chiller Configuration (Master Chiller Example) (cont)

SUB-MODE

ITEM

KEYPAD ENTRY

DISPLAY

ITEM EXPANSION

COMMENTS

RSET

LLBL

ENTER

LEAD/LAG BALANCE SELECT

CHANGE ACCEPTED

ESCAPE

LLBL

LLBD

168

LLBD

LLDY

LEAD/LAG BALANCE DELTA

LLBD

LLDY

PARA

ENTER

DEFAULT 168

ESCAPE

LAG START DELAY

ENTER

SCROLLING STOPS

VALUE FLASHES

SELECT 10

ENTER

ESCAPE

ENTER

LAG START DELAY

CHANGE ACCEPTED

LLDY

RSET

YES

MASTER COMPLETE

NOTES:

1. Master Control Method (CTRL) can be configured as 0-Switch, 2-Occupancy or 3-SCN.

2. Parallel Configuration (PARA) cannot be changed.

Download from Www.Somanuals.com. All Manuals Search And Download.

Table 22 — Dual Chiller Configuration (Slave Chiller Example)

SUB-MODE

ITEM

KEYPAD ENTRY

DISPLAY

ITEM EXPANSION

COMMENTS

DISP

UNIT

OPT1

OPT2

ENTER

CTRL

CONTROL METHOD

SWITCH

CTRL

DEFAULT 0

ESCAPE

CTRL

SCNA

ENTER

SCN ADDRESS

SCROLLING STOPS

VALUE FLASHES

SELECT 2

(SEE NOTE 1)

SCNA

ENTER

CHANGE ACCEPTED

ESCAPE

SCNA

SCNB

DEFAULT 0

(SEE NOTE 2)

SCNB

ENTER

ESCAPE

SCN BUS NUMBER

SCNB

OPT2

RSET

CRST

LLEN

DSBL

ENBL

LLEN

MSSL

MAST

SLVE

MSSL

RSET

PROCEED TO

SUBMODE RSET

RSET

ENTER

COOLING RESET TYPE

LEAD/LAG CHILLER ENABLE

15 ITEMS

SCROLLING STOPS

VALUE FLASHES

SELECT ENBL

LLEN

MSSL

ENTER

LEAD/LAG CHILLER ENABLE

MASTER /SLAVE SELECT

CHANGE ACCEPTED

ESCAPE

ENTER

SCROLLING STOPS

VALUE FLASHES

SELECT SLVE

ENTER

ESCAPE

MASTER /SLAVE SELECT

CHANGE ACCEPTED

SLAVE COMPLETE

NOTES:

1. Slave Control Method (CTRL) must be configured for 0.

2. Slave SCN Address (SCNA) must be different than Master.

3. Slave SCN Bus Number (SCNB) must be the same as Master

4. Slave does not require SLVA, LLBL, LLBD, or LLDY to be configured.

Download from Www.Somanuals.com. All Manuals Search And Download.

Table 23 — Operating Modes

MODE

NO.

ITEM EXPANSION

DESCRIPTION

FSM CONTROLLING CHILLER

WSM CONTROLLING CHILLER

MASTER/SLAVE CONTROL

RAMP LOAD LIMITED

Flotronic™ System Manager (FSM) is controlling the chiller.

Water System Manager (WSM) is controlling the chiller.

Dual Chiller control is enabled.

Rampload(pull-down)limitingineffect.Inthismode,therateatwhichleavingfluidtemperature

isdroppedislimitedtoapredeterminedvaluetopreventcompressoroverloading. SeeCooling

Ramp Loading (CRMP) [Configuration, SLCT]. The pull-down limit can be modified, if desired,

to any rate from 0.2° F to 2° F (0.1° to 1° C)/minute.

TIMED OVERRIDE IN EFFECT

LOW COOLER SUCTION TEMPA

Timed override is in effect. This is a 1 to 4 hour temporary override of the programmed

schedule, forcing unit to Occupied mode. Override can be implemented with unit under

Local (Enable) or SCN (Sterlco Comfort Network) control. Override expires after each use.

Circuit A cooler Freeze Protection mode. At least one compressor must be on, and the Sat-

urated Suction Temperature is not increasing greater than 1.1° F (0.6° C) in 10 seconds. If

the saturated suction temperature is less than the Brine Freeze Point (BR.FZ) [Set Point,

FRZ] minus 3° F (1.7° C) and less than the leaving fluid temperature minus 14° F (7.8° C)

for 2 minutes, a stage of capacity will be removed from the circuit. Or, If the saturated suc-

tion temperature is less than the Brine Freeze Point (BR.FZ) [Set Point, FRZ] minus 14° F

(7.8 º C), for 90 seconds, a stage of capacity will be removed from the circuit. The control

will continue to decrease capacity as long as either condition exists.

LOW COOLER SUCTION TEMPB

SLOW CHANGE OVERRIDE

Circuit B cooler Freeze Protection mode. At least one compressor must be on, and the Sat-

urated Suction Temperature is not increasing greater than 1.1° F (0.6° C) in 10 seconds. If

the saturated suction temperature is less than the Brine Freeze Point (BR.FZ) [Set Point,

FRZ] minus 3° F (1.7° C) and less than the leaving fluid temperature minus 14° F (7.8° C)

for 2 minutes, a stage of capacity will be removed from the circuit. Or, If the saturated suc-

tion temperature is less than the Brine Freeze Point (BR.FZ) [Set Point, FRZ] minus 14° F

(7.8° C), for 90 seconds, a stage of capacity will be removed from the circuit. The control will

continue to decrease capacity as long as either condition exists.

Slow change override is in effect. The leaving fluid temperature is close to and moving

towards the control point.

MINIMUM OFF TIME ACTIVE

DUAL SETPOINT

Chiller is being held off by Minutes Off Time (DELY) [Configuration, OPT2].

Dual Set Point mode is in effect. Chiller controls to Cooling Set Point 1 (CSP.1) [Set Point,

COOL] during occupied periods and Cooling Set Point 2 (CSP.2) [Set Point, COOL] during

unoccupied periods.

TEMPERATURE RESET

Temperature reset is in effect. In this mode, chiller is using temperature reset to adjust leav-

ing fluid set point upward and is currently controlling to the modified set point. The set point

can be modified based on return fluid, outdoor-air-temperature, space temperature, or 4 to

20 mA signal.

DEMAND/SOUND LIMITED

Demand limit is in effect. This indicates that the capacity of the chiller is being limited by

demand limit control option. Because of this limitation, the chiller may not be able to pro-

duce the desired leaving fluid temperature. Demand limit can be controlled by switch inputs

or a 4 to 20 mA signal.

COOLER FREEZE PROTECTION

LOW TEMPERATURE COOLING

HIGH TEMPERATURE COOLING

Cooler fluid temperatures are approaching the Freeze point (see Alarms and Alerts section

for definition). The chiller will be shut down when either fluid temperature falls below the

Freeze point.

Chiller is in Cooling mode and the rate of change of the leaving fluid is negative and

decreasing faster than -0.5° F per minute. Error between leaving fluid and control point

exceeds fixed amount. Control will automatically unload the chiller if necessary.

Chiller is in Cooling mode and the rate of change of the leaving fluid is positive and increasing.

Error between leaving fluid and control point exceeds fixed amount. Control will automatically

load the chiller if necessary to better match the increasing load.

MAKING ICE

STORING ICE

Chiller is in an unoccupied mode and is using Cooling Set Point 3 (CSP.3) [Set Point, COOL]

to make ice. The ice done input to the Energy Management Module (EMM) is open.

Chiller is in an unoccupied mode and is controlling to Cooling Set Point 2 (CSP.2) [Set Point

COOL]. The ice done input to the Energy Management Module (EMM) is closed.

HIGH SCT CIRCUIT A

Chiller is in a Cooling mode and the Saturated Condensing Temperature (SCT) is greater than

the calculated maximum limit. No additional stages of capacity will be added. Chiller capacity

may be reduced if SCT continues to rise to avoid high-pressure switch trips by reducing con-

densing temperature.

HIGH SCT CIRCUIT B

Chiller is in a Cooling mode and the Saturated Condensing Temperature (SCT) is greater than

the calculated maximum limit. No additional stages of capacity will be added. Chiller capacity

may be reduced if SCT continues to rise to avoid high-pressure switch trips by reducing con-

densing temperature.

MINIMUM COMP ON TIME

Cooling load may be satisfied, however control continues to operate compressor to ensure

proper oil return. May be an indication of oversized application, low fluid flow rate or low loop

volume.

PUMP OFF DELAY TIME

LOW SOUND MODE

Cooling load is satisfied, however cooler pump continues to run for the number of minutes set

by the configuration variable Cooler Pump Shutdown Delay (PM.DY) [Configuration, OPT1].

Chiller operates at higher condensing temperature and/or reduced

capacity to minimize overall unit noise during evening/night hours (user-configurable).

SHORT LOOP OVERRIDE

Chiller is monitoring how fast compressor(s) is being cycled to maintain the desired leaving

fluid temperature. Control is limiting the rate of compressor cycling when this mode is active

to ensure proper oil return and also to prevent premature compressor failure. Low loop vol-

ume, low cooler flow and/or low chiller load are the primary causes for this mode.

Download from Www.Somanuals.com. All Manuals Search And Download.

Table 24 — Example of Reading and Clearing Alarms

KEYPAD

ENTRY

SUB-MODE

CRNT

ITEM

ITEM EXPANSION

COMMENT

ACTIVE ALARMS (AXXX) OR

ALERTS (TXXX) DISPLAYED.

ENTER

AXXX or TXXX

CURRENTLY ACTIVE ALARMS

ESCAPE

CRNT

Use to clear active alarms/alerts

NO Flashes

ENTER

RCRN

YES

Select YES

Alarms/alerts clear, YES changes to NO

Table 25A — 4-20 mA Reset

KEYPAD

ITEM

DISPLAY

SUB-MODE

RSET

ITEM

COMMENT

ENTRY

EXPANSION

0 = no reset

1 = 4 to 20 mA input

2 = Outdoor air temp

3 = Return Fluid

COOLING RESET

ENTER

CRST

TYPE

4 = Space Temperature

NO COOL RESET

Default: 125 F (51.7 C)

CRT1

CRT2

DGRC

4.0

TEMP

Range: 0° to 125 F

FULL COOL

RESET TEMP

DEGREES COOL

RESET

Default: 0° F (–17.8 C)

Range: 0° to 125 F

Default: 0° F (0° C) Reset at 20 mA

Range: –30 to 30 F (–16.7 to 16.7 C)

20.0

5.0 F

(2.8 C)

NOTE: The example above shows how to configure the chiller for 4-20 mA reset. No reset will occur

at 4.0 mA input, and a 5.0 F reset will occur at 20.0 mA. An EMM is required.

Table 25B — Menu Configuration of 4 to 20 mA Cooling Set Point Control

MODE

(RED LED)

KEYPAD

ENTRY

KEYPAD

ENTRY

ITEM

EXPANSION

SUB-MODE

DISP

ITEM

DISPLAY

COMMENT

ENTER

UNIT

OPT1

OPT2

RSET

CONFIGURATION

ENTER

SLCT

CLSP

COOLING SETPOINT SELECT

Scrolling Stops

Flashing ‘0’

Select ‘4’

ENTER

Change Accepted

Download from Www.Somanuals.com. All Manuals Search And Download.

Table 26A — Configuring Outdoor Air and Space Temperature Reset

DISPLAY

MODE

(RED LED)

KEYPAD

ENTRY

SUB-

MODE

KEYPAD

ENTRY

ITEM

EXPANSION

ITEM

COMMENT

Outdoor

Air

Space

ENTER

DISP

UNIT

OPT1

OPT2

2 = Outdoor-Air Temperature

4 = Space Temperature

(Connect to TB5-5,6)

ENTER

COOLING RESET

TYPE

CONFIGURATION

RSET

CRST

REMOTE - NO

RESET TEMP

Default: 125.0 F (51.7 C)

RM.NO*

RM.F

85 °F

72 °F

Range: 0° to125 F

REMOTE - FULL

RESET TEMP

Default: 0.0° F (-17.7 C)

Range: 0° to 125 F

55 °F

68 °F

Default: 0° F (0° C)

Range: –30 to 30 F

(–34.4 to -1.1 °C)

REMOTE - DEGREES

RESET

RM.DG

15 °F

6 °F

*4 items skipped in this example.

Table 26B — Configuring Return Temperature Reset

MODE

(RED LED)

KEYPAD

ENTRY

KEYPAD

ENTRY

ITEM

SUB-MODE

DISP

ITEM

TEST

TYPE

FLUD

CTRL

DISPLAY

COMMENT

EXPANSION

ENTER

ON/OFF

TEST DISPLAY LEDs

UNIT TYPE

UNIT

OPT1

COOLER FLUID

CONTROL METHOD

OPT2

0 = No Reset

ENTER

1 = 4 to 20 mA Input (EMM required)

(Connect to EMM TB6-2,3)

CONFIGURATION

RSET

CRST

COOLING RESET TYPE 2 = Outdoor-Air Temperature

3 = Return Fluid

4 = Space Temperature

(Connect to TB5-5,6)

RETURN FLUID - NO

RESET TEMP

Default: 10.0 ∆F (5.6 ∆C)

RT.NO* XXX.X ∆F

RT.F XXX.X ∆F

RT.DG XX.X ∆F

Range: 0° to125 F COOLER ∆T

RETURN FLUID - FULL Default: 0 ∆F (–17.8 ∆C)

RESET TEMP

Range: 0° to 125 F COOLER ∆T

RETURN - DEGREES

RESET

Default: 0 ∆F (0 ∆C)

Range: –30 to 30°F (–16.7 to 16.7 C)

*4 items skipped in this example.

To use Outdoor Air or Space Temperature reset, four vari-

ables must be configured. In the Configuration mode under the

sub-mode RSET, items CRST, RM.NO, RM.F and RT.DG

must be properly set. See Table 26A — Configuring Outdoor

Air and Space Temperature Reset. The outdoor air reset exam-

ple provides 0° F (0° C) chilled water set point reset at 85.0 F

(29.4 C) outdoor-air temperature and 15.0 F (8.3 C) reset at

55.0 F (12.8 C) outdoor-air temperature. The space tempera-

ture reset example provides 0° F (0° C) chilled water set point

reset at 72.0 F (22.2 C) space temperature and 6.0 F (3.3 C)

reset at 68.0 F (20.0 C) space temperature. The variable CRST

should be configured for the type of reset desired. The variable

RM.NO should be set to the temperature that no reset should

occur. The variable RM.F should be set to the temperature that

maximum reset is to occur. The variable RM.DG should be set

to the maximum amount of reset desired.

Temperature Reset — The control system is capable of

handling leaving-fluid temperature reset based on return cooler

fluid temperature. Because the change in temperature through

the cooler is a measure of the building load, the return tempera-

ture reset is in effect an average building load reset method.

The control system is also capable of temperature reset based

on outdoor-air temperature (OAT), space temperature (SPT), or

from an externally powered 4 to 20 mA signal. Accessory sen-

sors must be used for SPT reset (33ZCT55SPT). The Energy

Management Module (EMM) must be used for temperature

reset using a 4 to 20 mA signal. See Tables 25A and 25B.

IMPORTANT: Care should be taken when interfacing with

other control systems due to possible power supply differ-

ences: full wave bridge versus half wave rectification. Con-

nection of control devices with different power supplies

may result in permanent damage. ComfortLink™ controls

incorporate power supplies with half wave rectification. A

signal isolation device should be utilized if the signal gen-

erator incorporates a full wave bridge rectifier.

To use Return reset, four variables must be configured. In

the Configuration mode under the sub-mode RSET, items

CRST, RT.NO, RT.F and RT.DG must be properly set. See

Table 26B — Configuring Return Temperature Reset. This ex-

ample provides 5.0 F (2.8 C) chilled water set point reset at

Download from Www.Somanuals.com. All Manuals Search And Download.

2.0 F (1.1 C) cooler ∆T and 0° F (0° C) reset at 10.0 F (5.6 C)

cooler ∆T. The variable RT.NO should be set to the cooler

temperature difference (∆T) where no chilled water tempera-

ture reset should occur. The variable RT.F should be set to the

cooler temperature difference where the maximum chilled wa-

ter temperature reset should occur. The variable RM.DG

should be set to the maximum amount of reset desired.

To verify that reset is functioning correctly proceed to Run

Status mode, sub-mode VIEW, and subtract the active set point

(SETP) from the control point (CTPT) to determine the degrees

reset.

Under normal operation, the chiller will maintain a constant

leaving fluid temperature approximately equal to the chilled

fluid set point. As the cooler load varies, the entering cooler

fluid will change in proportion to the load as shown in Fig. 18.

Usually the chiller size and leaving-fluid temperature set point

are selected based on a full-load condition. At part load, the flu-

id temperature set point may be colder than required. If the

leaving fluid temperature was allowed to increase at part load,

the efficiency of the machine would increase.

LEGEND

LWT — Leaving Water (Fluid) Temperature

Fig. 19 — Outdoor-Air Temperature Reset

Return temperature reset allows for the leaving temperature

set point to be reset upward as a function of the return fluid

temperature or, in effect, the building load.

Figures 19 and 20 are examples of outdoor air and space

temperature resets.

LEGEND

LWT — Leaving Water (Fluid) Temperature

Fig. 20 — Space Temperature Reset

configure the 2 Demand Limit Switch points (DLS1 and DLS2)

[Configuration, RSET] to the desired capacity limit. See

Table 27. Capacity steps are controlled by 2 relay switch inputs

field wired to TB6 as shown in Fig. 4-6.

For Demand Limit by 2-stage switch control, closing the

first stage demand limit contact will put the unit on the first de-

mand limit level. The unit will not exceed the percentage of ca-

pacity entered as Demand Limit Switch 1 set point. Closing

contacts on the second demand limit switch prevents the unit

from exceeding the capacity entered as Demand Limit Switch

2 set point. The demand limit stage that is set to the lowest de-

mand takes priority if both demand limit inputs are closed. If

the demand limit percentage does not match unit staging, the

unit will limit capacity to the closest capacity stage.

LEGEND

Entering Water (Fluid) Temperature

Leaving Water (Fluid) Temperature

EWT

LWT

—

Fig. 18 — Standard Chilled Fluid

Temperature Control — No Reset

Demand Limit — Demand Limit is a feature that allows

the unit capacity to be limited during periods of peak energy us-

age. There are 3 types of demand limiting that can be config-

ured. The first type is through 2-stage switch control, which will

reduce the maximum capacity to 2 user-configurable percentag-

es. The second type is by 4 to 20 mA signal input which will re-

duce the maximum capacity linearly between 100% at a 4 mA

input signal (no reduction) down to the user-configurable level

at a 20 mA input signal. The third type uses the CNN Loadshed

module and has the ability to limit the current operating capaci-

ty to maximum and further reduce the capacity if required.

NOTE: The 2-stage switch control and 4- to 20-mA input sig-

nal types of demand limiting require the Energy Management

Module (EMM).

To use Demand Limit, select the type of demand limiting to

use. Then configure the Demand Limit set points based on the

type selected.

To disable demand limit configure the DMDC to 0. See

Table 27.

EXTERNALLY POWERED DEMAND LIMIT (4 to

20 mA Controlled) — To configure Demand Limit for 4 to 20

mA control set the Demand Limit Select (DMDC) [Configura-

tion, RSET] to 2. Then configure the Demand Limit at 20 mA

(DM20) [Configuration, RSET] to the maximum loadshed val-

ue desired. Connect the output from an externally powered 4 to

20 mA signal to terminal block TB6, terminals 1 and 5. Refer

to the unit wiring diagram for these connections to the optional/

accessory Energy Management Module and terminal block.

The control will reduce allowable capacity to this level for the

20 mA signal. See Table 27 and Fig. 21A.

DEMAND LIMIT (2-Stage Switch Controlled) — To con-

figure Demand Limit for 2-stage switch control set the Demand

Limit Select (DMDC) [Configuration, RSET] to 1. Then

Download from Www.Somanuals.com. All Manuals Search And Download.

100

50% CAPACITY AT 20 mA

100% CAPACITY AT 4 mA

75% CAPACITY AT 12 mA

DEMAND LIMIT SIGNAL – 4 - 20 mA INPUT

Fig. 21A — 4- to 20-mA Demand Limiting

Redline command is received, the current stage of capacity is

set to the maximum stages available. Should the loadshed con-

trol send a Loadshed command, the ComfortLink control will

reduce the current stages by the value entered for Loadshed

Demand delta. The Maximum Loadshed Time is the maximum

length of time that a loadshed condition is allowed to exist. The

control will disable the Redline/Loadshed command if no Can-

cel command has been received within the configured maxi-

mum loadshed time limit.

Care should be taken when interfacing with other manufac-

turer’s control systems, due to possible power supply

differences, full wave bridge versus half wave rectification.

The two different power supplies cannot be mixed.

ComfortLink™ controls use half wave rectification. A sig-

nal isolation device should be utilized if a full wave bridge

signal generating device is used.

Cooling Set Point (4 to 20 mA) — A field supplied

and generated, externally powered 4 to 20 mA signal can be

used to provide the leaving fluid temperature set point. Connect

the signal to TB6-3,5 (+,–). See Table 27 for instructions to

enable the function. Figure 21B shows how the 4 to 20 mA sig-

nal is linearly calculated on an overall 10 F to 80 F range for

fluid types (FLUD) 1 or 2 [Configuration, OPT1]. The set point

will be limited by the fluid (FLUD) type. Be sure that the

chilled water loop is protected at the lowest temperature.

DEMAND LIMIT (SCN Loadshed Controlled) — To con-

figure Demand Limit for SCN Loadshed control set the De-

mand Limit Select (DMDC) [Configuration, RSET] to 3. Then

configure the Loadshed Group Number (SHNM), Loadshed

Demand Delta (SHDL), and Maximum Loadshed Time

(SHTM) [Configuration, RSET]. See Table 27.

The Loadshed Group number is established by the SCN

system designer. The ComfortLink control will respond to a

Redline command from the Loadshed control. When the

100

(38)

(32)

(27)

(21)

MAXIMUM

SET POINT

70 F (21.1 C)

(15)

(10)

(4.4)

(FLUD = 1) MINIMUM

SET POINT 38 F (3.3 C)

(-1)

(-7)

(FLUD = 2) MINIMUM

SET POINT 14 F (-10 C)

(-12)

(-17)

6.3

8.6

10.9

13.1

15.4

17.7

4 TO 20 mA SIGNAL TO EMM

EMM — Energy Management Module

Fig. 21B — Cooling Set Point (4 to 20 mA)

Download from Www.Somanuals.com. All Manuals Search And Download.

Table 27 — Configuring Demand Limit

KEYPAD

ENTRY

KEYPAD

MODE

SUB-MODE

DISP

ITEM

TEST

TYPE

FLUD

CTRL

CRST

DISPLAY

ITEM EXPANSION

Test Display LEDs

Unit Type

COMMENT

ENTRY

CONFIGURATION

ENTER

ON/OFF

ENTER

UNIT

OPT1

Cooler Fluid

OPT2

Control Method

Cooling Reset Type

RSET

Default: 0

0 = None

1 = Switch

DMDC*

Demand Limit Select

2 = 4 to 20 mA Input

3 = SCN Loadshed

Default: 100%

DM20

SHNM

SHDL

SHTM

DLS1

DLS2

XXX %

XXX

Demand Limit at 20 mA

Range: 0 to 100

Loadshed Group

Number

Default: 0

Range: 0 to 99

Loadshed Demand

Delta

Default: 0%

Range: 0 to 60%

XXX%

XXX MIN

XXX %

Maximum Loadshed

Time

Default: 60 min.

Range: 0 to 120 min.

Demand Limit

Switch 1

Default: 80%

Range: 0 to 100%

Demand Limit

Switch 2

Default: 50%

Range: 0 to 100%

*Seven items skipped in this example.

OPEN 24-V CONTROL CIRCUIT BREAKER(S) — De-

termine the cause of the failure and correct. Reset circuit break-

er(s). Restart is automatic after MBB start-up cycle is com-

plete.

COOLING LOAD SATISFIED — Unit shuts down when

cooling load has been satisfied. Unit restarts when required to

satisfy leaving fluid temperature set point.

THERMISTOR FAILURE — If a thermistor fails in either an

open or shorted condition, the unit will be shut down. Replace

T1, T2, or T9 as required. Unit restarts automatically, but must

be reset manually by resetting the alarm with the Scrolling

Marquee as shown in Table 24.

TROUBLESHOOTING

Complete Unit Stoppage and Restart — Possi-

ble causes for unit stoppage and reset methods are shown be-

low. (See Table 28 also.) Refer to Fig. 22-26 for Component

Arrangement and Control Wiring Diagrams.

GENERAL POWER FAILURE — After power is restored,

restart is automatic through normal MBB start-up.

UNIT ENABLE-OFF-REMOTE CONTACT SWITCH IS

OFF — When the switch is OFF, the unit will stop immediate-

ly. Place the switch in the ENABLE position for local switch

control or in the REMOTE CONTACT position for control

through remote contact closure.

CHILLED FLUID PROOF-OF-FLOW SWITCH OPEN —

After the problem causing the loss of flow has been corrected,

reset is manual by resetting the alarm with the Scrolling Mar-

quee as shown in Table 24.

OPEN HIGH-PRESSURE SWITCH(ES) — Determine and

correct the cause of the failure. The switch automatically resets,

but the unit must be reset manually by resetting the alarm with

the Scrolling Marquee as shown in Table 24.

OPEN COMPRESSOR INTERNAL THERMAL PRO-

TECTION — This switch provides compressor over tempera-

ture protection. Determine and correct the cause of the prob-

lem. The switch resets automatically, but the unit must be reset

manually resetting the alarm with the Scrolling Marquee as

shown in Table 24.

If unit stoppage occurs more than once as a result of any of

the safety devices listed, determine and correct cause

before attempting another restart.

LOW SATURATED SUCTION — Several conditions can

lead to low saturated suction alarms and the chiller controls

have several override modes built in which will attempt to keep

the chiller from shutting down. Low fluid flow, low refrigerant

charge and plugged filter driers are the main causes for this

condition. To avoid permanent damage and potential freezing

of the system, do NOT repeatedly reset these alert and/or alarm

conditions without identifying and correcting the cause(s).

Download from Www.Somanuals.com. All Manuals Search And Download.

Table 28 — Troubleshooting

SYMPTOMS

CAUSE

REMEDY

Cooler Circulating Pump Does

Not Run

Power line open

Control fuse or circuit breaker open

Reset circuit breaker.

Check control circuit for ground or short. Reset

breaker and replace fuse.

Compressor over temperature sensor open (06D)

Tripped power breaker

Find cause of high temperature and reset controls.

Check the controls. Find the cause of trip and reset

breaker.

Cooler circulating pump not running

Power off — restart.

Pump binding — free pump.

Incorrect wiring —rewire.

Pump motor burned out — replace.

Check connections.

Check wiring and rewire if necessary.

Check line voltage — determine location of

voltage drop and remedy deficiency.

Loose terminal connection

Improperly wired controls

Low line voltage

Compressor motor defective

Check motor winding for open or short.

Replace compressor if necessary.

Seized compressor

Replace compressor.

Compressor Cycles

Off on Loss of Charge

Loss of charge control erratic in action

Repair leak and recharge.

Replace control.

Low refrigerant charge

Low suction temperature

Thermistor failure

System load was reduced faster than controller

could remove stages

Add refrigerant.

Raise cooler leaving fluid temperature set point.

Replace thermistor.

Unit will restart after fluid temperature rises back into

the control band. Avoid rapidly removing system

load.

Compressor Cycles Off on Out

of Range Condition

Temperature controller deadband setting is too low

High-pressure control acting erratically

Compressor discharge valve partially closed

Noncondensables in system

Raise deadband setting.

Replace control.

Open valve or replace (if defective).

Purge system.

Compressor Shuts Down on

High-Pressure Control

Condenser scaled/dirty

Clean condenser.

Condenser water pump or fans not operating

System overcharged with refrigerant

Low refrigerant charge

Start pump — repair or replace if defective.

Reduce charge.

Add refrigerant.

Unit Operates Too Long

or Continuously

Control contacts fused

Replace control.

Air in system

Purge system.

Partially plugged or plugged expansion valve or filter Clean or replace as needed.

drier

Defective insulation

Service load

Inefficient compressor

Piping vibration

Replace or repair as needed.

Keep doors and windows closed.

Check valves, and replace if necessary.

Support piping as required.

Unusual or Loud System

Noises

Check for loose pipe connections

Add refrigerant.

Check for plugged liquid line filter drier.

Replace compressor (worn bearings).

Check for loose compressor holddown bolts.

Repair leak.

Expansion valve hissing

Compressor noisy

Leak in system

Compressor Loses Oil

Mechanical damage (Failed seals or broken scrolls) Replace compressor.

Oil trapped in line

Check piping for oil traps.

Repair leak and recharge.

Open valve or remove restriction.

Replace filter drier.

Hot Liquid Line

Frosted Liquid Line

Shortage of refrigerant due to leak

Shutoff valve partially closed or restricted

Restricted filter drier

Frosted Suction Line

Freeze-Up

Expansion valve admitting excess refrigerant (note: Adjust expansion valve. Replace valve if defective.

this is a normal condition for brine applications)

Improper charging

Make sure a full quantity of fluid is flowing through

the cooler while charging, and suction pressure in

cooler is equal to or greater than pressure corre-

sponding to 32 F (0° C) (58 psig [400 kPa] for

Refrigerant 22).

System not drained for winter shutdown

Loose Thermistor

Recommended that system be filled with an appro-

priate glycol mixture to prevent freezing of pumps

and fluid tubing.

Verify thermistors are fully inserted in wells.

Download from Www.Somanuals.com. All Manuals Search And Download.

LEGEND

—

Contactor, Compressor

Circuit Breaker

CHC

CWP

EMM

Cooler/Pump Heater Contactor

Chilled Water Pump

Energy Management

Fan Contactor

FIOP

Factory-Installed Option

Fuse

GND

MBB

Ground

Main Base Board

Motormaster®

MMPT

Motormaster Pressure Transducer

Manual Starter

NEC

National Electrical Code

Switch

Terminal Block

Transformer

TRAN

Factory Wiring

Field Wiring

Accessory or Option Wiring

Fig. 22 — Component Arrangement — 30RA010-030

Download from Www.Somanuals.com. All Manuals Search And Download.

LEGEND

—

Contactor, Compressor

Circuit Breaker

CHC

CWP

EMM

Cooler/Pump Heater Contactor

Chilled Water Pump

Energy Management

Fan Contactor

FIOP

Factory-Installed Option

Fuse

GND

MBB

Ground

Main Base Board

Motormaster®

MMPT

Motormaster Pressure Transducer

Manual Starter

NEC

National Electrical Code

Switch

Terminal Block

Transformer

TRAN

Factory Wiring

Field Wiring

Accessory or Option Wiring

Fig. 23 — Component Arrangement — 30RA032-040

Download from Www.Somanuals.com. All Manuals Search And Download.

LEGEND

—

Contactor, Compressor

Circuit Breaker

Cooler/Pump Heater Contactor

Chilled Water Pump

Energy Management

Fan Contactor

CHC

CWP

EMM

FIOP

Factory-Installed Option

Fuse

Ground

Main Base Board

Motormaster®

GND

MBB

MMPT

Motormaster Pressure Transducer

Manual Starter

NEC

National Electrical Code

Switch

Terminal Block

Transformer

TRAN

Factory Wiring

Field Wiring

Accessory or Option Wiring

Fig. 24 — Component Arrangement — 30RA042-055

Download from Www.Somanuals.com. All Manuals Search And Download.

ALL CURRENT ALARMS” is displayed. Press

Alarms and Alerts — These are warnings of abnormal

or fault conditions, and may cause either one circuit or the

whole unit to shut down. They are assigned code numbers as

described in Table 29.

Automatic alarms will reset without operator intervention if

the condition corrects itself. The following method must be

used to reset manual alarms:

Before resetting any alarm, first determine the cause of the

alarm and correct it. Enter the Alarms mode indicated by the

LED on the side of the Scrolling Marquee Display. Press

ENTER

The control will prompt the user for a password, by displaying

PASS and WORD. Press to display the default pass-

ENTER

for each character. If the password

word, 1111. Press

ENTER

has been changed, use the arrow keys to change each individu-

al character. Toggle the display to “YES” and press

The alarms will be reset.

ENTER

and

until the sub-menu item RCRN “RESET

ENTER

Table 29 — Alarm and Alert Codes

ALARM/ ALARM

WHY WAS THIS

ALARM

GENERATED?

ACTION TAKEN

BY CONTROL

RESET

METHOD

PROBABLE

CAUSE

ALERT

CODE

DESCRIPTION

ALERT

T051

T052

T055

T056

Alert

Circuit A, Compressor 1

Failure

Compressor feedback signal

does not match relay state

Compressor A1 shut

down.

Manual High-pressure switch open,

faulty auxiliary contacts, loss

of condenser air, liquid

valve closed, filter drier

plugged, non-condensables,

operation beyond capability.

Circuit A, Compressor 2

Failure

Compressor feedback signal

does not match relay state

Compressor A2 shut

down.

Manual High-pressure switch open,

faulty auxiliary contacts, loss

of condenser air, liquid

valve closed, filter drier

plugged, non-condensables,

operation beyond capability.

Circuit B, Compressor 1

Failure

Compressor feedback signal

does not match relay state

Compressor B1 shut

down.

Manual High-pressure switch open,

faulty auxiliary contacts, loss

of condenser air, liquid

valve closed, filter drier

plugged, non-condensables,

operation beyond capability.

Circuit B, Compressor 2

Failure

Compressor feedback signal

does not match relay state

Compressor B2 shut

down.

Manual High-pressure switch open,

faulty auxiliary contacts, loss

of condenser air, liquid

valve closed, filter drier

plugged, non-condensables,

operation beyond capability.

A060

A061

T068

Alarm Cooler Leaving Fluid

Thermistor Failure (T1)

Thermistor outside range of

Chiller shutdown

immediately

Automatic Thermistor failure, damaged

cable/wire or wiring error.

–40 to 245 F (–40 to 118 C)

Alarm Cooler Entering Fluid

Thermistor Failure (T2)

Thermistor outside range of

–40 to 245 F (–40 to 118 C)

Chiller shutdown

immediately

Automatic Thermistor failure, damaged

cable/wire or wiring error.

None

Alert

Circuit A Return Gas Thermistor Failure If return gas sensors are

enabled (RG.EN) and

None

Automatic Thermistor failure, damaged

cable/wire or wiring error.

thermistor is outside range of

–40 to 245 F (–40 to 118 C)

T069

T073

Circuit B Return Gas Thermistor Failure If return gas sensors are

enabled (RG.EN) and

Automatic Thermistor failure, damaged

cable/wire or wiring error.

thermistor is outside range of

–40 to 245 F –40 to 118 C)

Outside Air Thermistor

Failure (T9)

Thermistor outside range of

–40 to 245 F (–40 to 118 C)

Temperature reset

Automatic Thermistor failure, damaged

cable/wire or wiring error.

disabled. Chiller runs

under normal control/set

points. When capacity

reaches 0, cooler/pump

heaters are energized.

T074

T077

T078

Alert

Space Temperature

Thermistor outside range of

Temperature reset

disabled. Chiller runs

under normal control/set

points.

Automatic Thermistor failure, damaged

cable/wire or wiring error.

Thermistor Failure (T10)

–40 to 245 F (–40 to 118 C)

Circuit A Saturated

Suction Temperature

exceeds Cooler Leaving

Fluid Temperature

Faulty expansion valve,

suction pressure transducer

or leaving fluid thermistor

(T1).

Circuit A shutdown after

pumpdown complete.

Automatic Faulty expansion valve or

suction pressure transducer

(T5) or leaving fluid

thermistor (T1).

Circuit B Saturated

Suction Temperature

exceeds Cooler Leaving

Fluid Temperature

Faulty expansion valve,

suction pressure transducer

or leaving fluid thermistor

(T1).

Circuit B shutdown after

pumpdown complete

Automatic Faulty expansion valve or

suction pressure transducer

(T6) or leaving fluid

thermistor (T1).

T079

T090

T091

T092

Alert

Lead/Lag LWT

Thermistor outside range of

Chiller runs as a stand

alone machine

Automatic Dual LWT thermistor failure,

damaged cable/wire or

wiring error.

Thermistor Failure

–40 to 245 F (–40 to 118 C)

Circuit A Discharge

Pressure Transducer Failure

Voltage ratio more than

99.9% or less than .5%.

Circuit A shut down

Circuit B shut down

Circuit A shut down

Automatic Transducer failure, poor

connection to MBB, or wiring

damage/error.

Circuit B Discharge

Pressure Transducer Failure

Voltage ratio more than

99.9% or less than .5%.

Automatic Transducer failure, poor

connection to MBB, or wiring

damage/error.

Circuit A Suction

Pressure Transducer Failure

Voltage ratio more than

99.9% or less than .5%.

Automatic Transducer failure, poor

connection to MBB, or wiring

damage/error.

Download from Www.Somanuals.com. All Manuals Search And Download.

Table 29 — Alarm and Alert Codes (cont)

ALARM/

ALERT

CODE

ALARM

ALERT

WHY WAS THIS

ACTION TAKEN

ALARM

RESET

METHOD

PROBABLE

CAUSE

DESCRIPTION

BY CONTROL

GENERATED?

T093

Alert

Circuit B Suction

Voltage ratio more than

99.9% or less than .5%.

Circuit B shut down

Automatic

Manual

Transducer failure, poor

connection to MBB, or wiring

damage/error.

Pressure Transducer

Failure

T110

Alert

Circuit A Loss of Charge

If the compressors are off

and discharge pressure

reading is < 10 psig for

30 sec.

Circuit not allowed to

start.

Refrigerant leak or

transducer failure

T111

T112

T113

T114

Alert

Circuit B Loss of Charge

If the compressors are off

and discharge pressure

reading is < 10 psig for

30 sec.

Circuit not allowed to

start.

Manual

Refrigerant leak or

transducer failure

Circuit A High Saturated

Suction Temperature

Circuit saturated suction

temperature pressure

transducer > 60 F (15.6 C)

for 5 minutes

Circuit shut down

Faulty Expansion valve,

faulty suction pressure

transducer or high entering

fluid temperature.

Circuit B High Saturated

Suction Temperature

Circuit saturated suction

temperature pressure

transducer > 60 F (15.6 C)

for 5 minutes

Faulty Expansion valve,

faulty suction pressure

transducer or high entering

fluid temperature.

Circuit A Low Suction

Superheat

Return gas sensor enabled

and suction superheat is

more than 10° F (5.6 C)

below the suction superheat

set point for 5 minutes.

Circuit A shut down after Automatic restart

pumpdown complete.

Faulty expansion valve,

faulty suction pressure

transducer, faulty suction gas

thermistor, circuit

after first daily

occurrence.

Manual restart

thereafter.

overcharged

T115

T116

T117

T126

Alert

Circuit B Low Suction

Superheat

Return gas sensor enabled

and suction superheat is

more than 10° F (5.6 C)

below the suction superheat

set point for 5 minutes.

Circuit B shut down after Automatic restart

Faulty expansion valve,

faulty suction pressure

transducer, faulty suction

gas thermistor, circuit

overcharged

pumpdown complete.

after first daily

occurrence.

Manual restart

thereafter.

Circuit A Low Cooler

Suction Temperature

Mode 7 caused the com-

pressor to unload 6 consecu-

tive times with less than a

30-minute interval between

each circuit shutdown.

Circuit shut down

Manual

Faulty expansion valve, low

refrigerant charge, plugged

filter drier, faulty suction

pressure transducer, low

cooler fluid flow

Circuit B Low Cooler

Suction Temperature

Mode 8 caused the com-

pressor to unload 6 consecu-

tive times with less than a

30-minute interval between

each circuit shutdown.

Circuit shut down

Faulty expansion valve, low

refrigerant charge, plugged

filter drier, faulty suction

pressure transducer, low

cooler fluid flow

Circuit A High

Discharge Pressure

SCT >Maximum condensing Circuit shut down

temperature from operating

envelope

Automatic, only

after first 3 daily

occurrences.

Faulty transducer/high

pressure switch, low/

restricted condenser

airflow

Manual reset

thereafter. Read-

ing from OAT sen-

sor (T9) must drop

5 F (2.8 C) before

restart

T127

Alert

Circuit B High

Discharge Pressure

SCT >Maximum condensing Circuit shut down

temperature from operating

envelope

Automatic, only

after first 3 daily

Faulty transducer/high

pressure switch, low/

occurrences. Man- restricted condenser

ual reset thereafter. airflow

Reading from OAT

sensor (T9) must

drop 5 F (2.8 C)

before restart

T133

T134

Alert

Circuit A Low Suction

Pressure

Suction pressure below

15 psig for 8 seconds or

below 8 psig

Circuit shut down

Automatic

Faulty or plugged TXV, low

refrigerant charge, TXV out

of adjustment, liquid

restart after first

daily occurrence.

Manual restart

thereafter.

line valve partially closed

Circuit B Low Suction

Pressure

Suction pressure below

15 psig for 8 seconds or

below 8 psig

Automatic

Faulty or plugged TXV, low

refrigerant charge, TXV out

of adjustment, liquid

restart after first

daily occurrence.

Manual restart

thereafter.

line valve partially closed

Download from Www.Somanuals.com. All Manuals Search And Download.

Table 29 — Alarm and Alert Codes (cont)

ALARM/

ALERT

CODE

ALARM

ALERT

WHY WAS THIS

ACTION TAKEN

ALARM

RESET

METHOD

PROBABLE

CAUSE

DESCRIPTION

BY CONTROL

GENERATED?

A140

Alert

Reverse Rotation

Detected

Incoming chiller power

leads not phased correctly

Chiller not allowed to

start.

Manual

Reverse any two

incoming power

leads to correct.

Check for correct fan

rotation first.

A150

Alarm

Emergency Stop

SCN emergency stop

command received

Chiller shutdown

without going through

pumpdown.

Automatic once SCN

command for

EMSTOP returns to

normal

SCN Network

command.

A151

A152

Alarm

Illegal Configuration

One or more illegal

configurations exists.

Chiller is not allowed to

start.

Manual once

Configuration error.

Check unit settings.

configuration errors

are corrected

Unit Down Due to

Failure

Both circuits are down due

to alarms/alerts.

Chiller is unable

to run.

Automatic once

alarms/alerts are

cleared that prevent

the chiller from

starting.

Alarm notifies user

that chiller is 100%

down.

T153

Alert

Real Time Clock

Hardware Failure

Internal clock on MBB fails

Hardware failure with MBB

Occupancy schedule

will not be used. Chiller

defaults to Local On

mode.

Automatic when

correct clock control

restarts.

Time/Date/Month/

Day/Year not

properly set.

A154

T155

Alarm

Alert

Serial EEPROM

Hardware Failure

Chiller is unable

to run.

Manual

Main Base Board

failure.

Serial EEPROM

Storage Failure

Configuration/storage

failure with MBB

No Action

Potential failure of

MBB. Download

current operating

software. Replace

MBB if error occurs

again.

A156

A157

A189

Alarm

Critical Serial EEPROM

Storage Failure

Configuration/storage

failure with MBB

Chiller is not allowed

to run.

Manual

Main Base Board

failure.

A/D Hardware Failure

Hardware failure with

peripheral device

Chiller is not allowed

to run.

Main Base Board

failure.

Cooler pump auxiliary

contact inputs miswired

Pump 1 (2) aux contacts

closed when pump 2 (1)

energized.

Both pump outputs

are turned off.

Wiring error, faulty

pump contactor

auxiliary contacts.

T173

Alert

Loss of Communication

with EMM

MBB loses communication

with EMM

4 to 20 mA

Automatic

Wiring error, faulty

wiring or failed

Energy Manage-

ment Module (EMM).

temperature reset

disabled. Demand

Limit set to 100%. 4 to

20 mA set point

disabled.

T174

T176

Alert

4 to 20 mA Cooling Set

Point Input Failure

If configured with EMM and

input less than 2 mA or

greater than 22 mA

Set point function

disabled. Chiller

controls to CSP1.

Automatic

Faulty signal

generator, wiring

error, or faulty EMM.

4 to 20 mA

Temperature Reset

Input Failure

If configured with EMM

and input less than 2 mA or

greater than 22 mA

Reset function

Faulty signal

generator, wiring

error, or faulty EMM.

disabled. Chiller

returns to normal set

point control.

T177

Alert

4 to 20 mA Demand

Limit Input Failure

If configured with EMM and

input less than 2 mA or

greater than 22 mA

Demand limit function

disabled. Chiller

returns to 100%

demand limit

Automatic

Faulty signal

generator, wiring

error, or faulty EMM.

control.

T189

T190

T191

T192

T193

T194

Alarm

Alert

Cooler pump 2 and

Aux Contact Input

miswired

Alarm is generated when

the pump’s aux contacts

close when a pump is

called for

Chiller not allowed to

start

Manual

Wiring error

Cooler pump 1 Aux

Contacts Failed to Close

at Start-Up

Pump 1 Auxiliary Contacts

did not close within

26 seconds after pump

was started

Pump 1 turned off.

Pump 2 will be started

if available.

Wiring error, faulty

contacts on pump

contactor

Cooler pump 2 Aux

Contacts Failed to Close

at Start-Up

Pump 2 Auxiliary Contacts

did not close within

26 seconds after pump

was started

Pump 2 turned off.

Pump 1 will be started

if available.

Wiring error, faulty

contacts on pump

contactor

Cooler pump 1 Failed

to Provide Flow at

Start-Up

Pump 1 did not provide

flow to close flow switch

within 60 seconds

Pump 1 turned off.

Pump 2 will be started

if available.

Wiring error, pump

circuit breaker

tripped, contactor

failure

Cooler pump 2 Failed

to Provide Flow at

Start-Up

Pump 2 did not provide

flow to close flow switch

within 60 seconds

Pump 1 turned off.

Pump 2 will be started

if available.

Wiring error, pump

circuit breaker

tripped, contactor

failure

Cooler pump 1 Aux

Contacts Opened

During Normal

Operation

Pump 1 Auxiliary Contacts

open for 26 seconds after

initially made. All

compressors shut down.

Pump 1 turned off.

Pump 2 will be started

if available. Chiller

allowed to run if

Pump 2 successfully

starts.

Wiring error, faulty

contacts on pump

contactor

T195

Alert

Cooler pump 2 Aux

Contacts Opened

During Normal

Operation

Pump 2 Auxiliary Contacts

open for 26 seconds after

initially made. All

compressors shut down.

Pump 2 turned off.

Pump 1 will be started

if available. Chiller

allowed to run if

Pump 1 successfully

starts.

Manual

Wiring error, faulty

contacts on pump

contactor

Download from Www.Somanuals.com. All Manuals Search And Download.

Table 29 — Alarm and Alert Codes (cont)

ALARM/

ALERT

CODE

ALARM

ALERT

WHY WAS THIS

ACTION TAKEN

ALARM

RESET

METHOD

PROBABLE

CAUSE

DESCRIPTION

BY CONTROL

GENERATED?

T196

Alert

Flow Lost While Pump 1

Running

Cooler flow switch contacts

open for 3 seconds after

initially made

All compressors

Manual

Wiring error, pump

circuit breaker

tripped, contactor fail-

ure

shut down. Pump 1

turned off. Pump 2 will

be started if available.

Chiller allowed to run if

Pump 2 successfully

starts and flow switch

is closed.

T197

Alert

Flow Lost While Pump 2

Running

Cooler flow switch contacts

open for 3 seconds after

initially made

All compressors shut

down. Pump 2 turned

off. Pump 1 will be

started if available.

Chiller allowed to run if

Pump 1 successfully

starts and flow switch

is closed.

Manual

Wiring error, pump

circuit breaker

tripped, contactor

failure

T198

T199

T200

Alert

Cooler pump 1 Aux

Contacts Closed While

Pump Off

Pump 1 Auxiliary Contacts

closed for 26 seconds

when pump state is off

Chiller not allowed to

start

Automatic when

Wiring error, faulty

pump contactor

aux contacts open

(welded contacts)

Cooler pump 2 Aux

Contacts Closed While

Pump Off

Pump 2 Auxiliary Contacts

closed for 26 seconds

when pump state is off

Chiller not allowed to

start

Automatic when

aux contacts open

Wiring error, faulty

pump contactor

(welded contacts)

Cooler Flow/Interlock

Contacts failed to Close

at start-up

Cooler flow switch contacts

failed to close within

Chiller not allowed to

start. For models with

dual pumps, the

second pump will be

started if available

Manual

Wiring error, pump

circuit breaker

tripped, contactor

failure, faulty flow

switch or interlock

1 minute (if cooler pump

control is enabled) or

within 5 minutes (if cooler

pump control is not

enabled) after start-up

A201

A202

T203

Alarm

Alert

Cooler Flow/Interlock

Contacts Opened

During Normal

Operation

Flow switch opens for at

least 3 seconds after

being initially closed

All compressors shut

down. For models with

dual pumps, the

second pump will be

started if available

Cooler pump failure,

faulty flow switch or

interlock, pump

circuit breaker

tripped

Cooler Pump Interlock

Closed When Pump is

Off

If configured for cooler

pump control and flow

switch input is closed for

5 minutes while pump

output(s) are off

Chiller shut down

Automatic when

aux contacts open

Wiring error, faulty

pump contactor

(welded contacts)

Loss of Communication

with slave chiller

Master chiller MBB

loses communication

with slave chiller MBB

Dual chiller control

disabled. Chiller runs

as a stand-alone

machine.

Automatic

Wiring error, faulty

wiring, failed Slave

chiller MBB module,

power loss at slave

chiller, wrong slave

address.

T204

T205

Alert

Loss of Communication

with master chiller

Slave chiller MBB loses

communication with

master chiller MBB

Dual chiller control

disabled. Chiller runs

as a stand-alone

machine

Automatic

Wiring error, faulty

wiring, failed master

chiller MBB module,

power loss at Master

chiller.

Master and slave chiller

with same address

Master and slave chiller

have the same SCN

address (SCN.A)

Dual chiller routine

disabled. Master/slave

run as stand-alone

chillers.

SCN Address for

both chillers is the

same. Must be

different. Check

SCN.A under the

OPT2 sub-mode in

Configuration at both

chillers.

T206

A207

Alert

High Leaving Chilled

Water Temperature

LWT read is greater than

LCW Alert Limit, Total

capacity is 100% and LWT

is greater than LWT

Alert only. No action

taken.

Automatic

Building load greater

than unit capacity,

low water/brine flow

or compressor fault.

Check for other

reading one minute ago

alarms/alerts.

Alarm

Cooler Freeze

Protection

Cooler EWT or LWT is less

than Brine Freeze (BR.FZ)

Chiller shutdown

without going through

pumpdown. Cooler

pump continues to

run a minimum of

5 minutes (if control

enabled).

Both EWT and LWT

must be at least 6 F

(3.3 C) above Brine

Freeze point (BR.FZ).

Automatic for first,

Manual reset thereaf-

ter.

Faulty thermistor

(T1/T2), low water

flow.

A208

T300

Alarm

Alert

EWT or LWT

Cooler EWT is less than

LWT by 3° F (1.7° C) for

1 minute after a circuit is

started

Chiller shutdown.

Manual

Faulty cooler pump,

low water flow,

Thermistor failure

Cooler pump shut off

(if control enabled).

plugged fluid strainer.

Cooler Pump 1

Scheduled

Maintenance Due

Pump 1 Service

None

Automatic

Routine pump

maintenance

required

Countdown (P.1.DN)

expired. Complete pump 1

maintenance and enter

'YES' for Pump 1

Maintenance Done

(P.1.MN) item.

Download from Www.Somanuals.com. All Manuals Search And Download.

Table 29 — Alarm and Alert Codes (cont)

ALARM/

ALERT

CODE

ALARM

ALERT

WHY WAS THIS

ACTION TAKEN

ALARM

RESET

METHOD

PROBABLE

CAUSE

DESCRIPTION

BY CONTROL

GENERATED?

T301

Alert

Cooler Pump 2

Pump 2 Service

None

Automatic

Routine pump

maintenance

required

Scheduled

Countdown (P.2.DN)

expired. Complete pump 2

maintenance and

Maintenance Due

enter 'YES' for Pump 1

Maintenance Done

(P.2.MN) item.

T302

T303

Alert

Strainer Blowdown

Scheduled

Strainer Service

None

Automatic

Routine strainer

maintenance

required

Countdown (S.T.DN)

expired. Complete strainer

blowdown and enter 'YES' for

Strainer Maintenance Done

(S.T.MN) item.

Maintenance Due

Condenser Coil

Maintenance Due

Coil Service Countdown

(C.L.DN) expired.

Complete condenser coil

cleaning and enter 'YES'

for Coil Maintenance Done

(C.L.MN) item.

Routine condenser

coil maintenance

required

T950

T951

T952

Alert

Loss of Communication

with Water System

Manager

No communications have

been received by the MBB

within 5 minutes of last

transmission

WSM forces removed.

Chiller runs under own

control

Automatic

Failed module, wiring

error, failed

transformer, loose

connection plug,

wrong address

Loss of Communication

with Flotronic™ System

Manager

No communications have

been received by the MBB

within 5 minutes of last

transmission

FSM forces removed.

Chiller runs under own

control

Failed module, wiring

error, failed

transformer, loose

connection plug,

wrong address

Loss of Communication

with Hydronic System

Manager

No communications have

been received by the MBB

within 5 minutes of last

transmission

HSM forces removed.

Chiller runs under own

control

Failed module, wiring

error, failed

transformer, loose

connection plug,

wrong address

LEGEND

SCN

—

Sterlco Comfort Network

Energy Management Module

Entering Fluid Temperature

Flotronic™ System Manager

Hydronic System Manager

Leaving Chilled Water

EMM

EWT

FSM

HSM

LCW

LWT

MBB

OAT

Leaving Fluid Temperature

Main Base Board

Outdoor-Air Temperature

Saturated Condensing Temperature

Thermostatic Expansion Valve

Water System Manager

SCT

TXV

WSM

Download from Www.Somanuals.com. All Manuals Search And Download.

Table 30 — Unit Torque Specification

SERVICE

FASTENER

Compressor Mounting

Bolts

Compressor Power

Connections

Compressor Ground

Terminal Connections

RECOMMENDED TORQUE

10 to 14 ft-lb (13.5 to 18.9 N-m)

ELECTRIC SHOCK HAZARD.

Turn off all power to unit before servicing. The

ENABLE/OFF/REMOTE CONTACT switch

on control panel does not shut off control

power; use field disconnect.

24 to 28 in.-lb (2.7- to 3.2 N-m)

14 to 18 in.-lb (1.6 to 2.0 N-m)

10 to 13 ft-lb (13.5 to 17.6 N-m)

Oil Equalization

Line Fitting

Electronic Components

CONTROL COMPONENTS — Unit uses an advanced elec-

tronic control system that normally does not require service.

For details on controls refer to Operating Data section.

Access to the compressors is through latched panels from

beneath the control box on all models or from opposite the coil

side (sizes 010-030 only). The front door(s) provide access to

the compressor(s) and all components of the refrigeration sys-

tem. For size 010-030 units, access to the controls is through

the upper latched outer door above the compressor access door.

Similarly, the upper center latched door on sizes 032-055 gives

access to the controls. Inner panels are secured in place and

should not be removed unless all power to the chiller is off.

Cooler

BRAZED-PLATE COOLER HEAT EXCHANGER RE-

PLACEMENT — Brazed-plate heat exchangers cannot be

repaired if they develop a leak. If a leak (refrigerant or water)

develops, the heat exchanger must be replaced. To replace a

brazed plate heat exchanger:

1. Disconnect the liquid-in and liquid-out connections at the

heat exchanger.

2. Check that the replacement heat exchanger is the same as

the original heat exchanger. The unit insulation covers the

manufacturer’s part number. Make sure the depths of the

replacement and original cooler heat exchangers are the

same.

3. Reclaim the refrigerant from the system, and unsolder the

refrigerant-in and refrigerant-out connections.

4. Remove the old heat exchanger and the bracket that it is

mounted to. The replacement heat exchanger is supplied

attached to a new mounting bracket and is fully insulated.

It also includes a cooler heater. Use of the heater is not re-

quired unless the original cooler contained a factory in-

stalled heater.

5. Install the replacement heat exchanger in the unit and at-

tach the mounting bracket hardware to the fan uprights

(sizes 010-030) or to the bottom bracket (sizes 032-055)

using the hardware removed in Step 4. Reconnect the

cooler heater if required.

Compressor Replacement (Refer to Fig. 27-

30) — All models contain scroll compressors and have from

one to four compressors. The size 010-030 units are a single re-

frigeration circuit while sizes 032-055 are dual circuit. A com-

pressor is most easily removed from the front of the unit, de-

pending on where clearance space was allowed during unit

installation.

Unscrew the junction box cover bolts and disconnect the

compressor power and ground connections. Remove the cable

from the compressor junction box. Remove the connections

from the internal thermostat and high-pressure switch (all com-

pressors except SM110) or high-pressure switch connections

(SM110 only). Knock the same holes out of the new compres-

sor junction box and install the cable connectors from the old

compressor. Remove the blockoff channel from below the con-

trol box.

6. Carefully braze the refrigerant lines to the connections on

the heat exchanger. Lines should be soldered using silver

as the soldering material with a minimum of 45% silver.

Keep the temperature below 1472 F (800 C) under nor-

mal soldering conditions (no vacuum) to prevent the cop-

per solder of the brazed plate heat exchanger from chang-

ing its structure. Failure to do so can result in internal

or external leakage at the connections which cannot be re-

paired.

Be sure the oil equalization line fitting is removed from the

old compressor and installed on the new compressor for those

models with dual compressor circuits. The compressors are

bolted to the unit basepan. Remove the 4 bolts holding the

compressor to the basepan. Save the mounting hardware for

use with the new compressor. Carefully cut the compressor

suction and discharge lines with a tubing cutter as close to the

compressor as feasible. For dual compressor circuits, do NOT

disturb the suction line tee at the backside of the compressors.

This tee contains a special tube that is required for proper oil

return. Remove high-pressure switch and pressure transduc-

er(s) if required for compressor removal. Lift one corner of the

compressor at a time and remove all the rubber mounting

grommets. Remove the old compressor from the unit.

Slide the new compressor in place on the basepan. Lifting

one side of the compressor at a time, replace all of the compres-

sor mounting grommets. Using new tubing or couplings as re-

quired, reconnect compressor suction and discharge lines. Us-

ing hardware saved, reinstall the mounting bolts and washers

through the compressor feet. Using proper techniques, braze

suction and discharge lines and check for leaks. Reconnect oil

equalization line on dual compressor circuit models.

7. Reconnect the water/brine lines.

8. Dehydrate and recharge the unit. Check for leaks.

BRAZED-PLATE COOLER HEAT EXCHANGER

CLEANING — Brazed-plate heat exchangers must be

cleaned chemically. A professional cleaning service skilled in

chemical cleaning should be used. Use a weak acid (5% phos-

phoric acid, or if the heat exchanger is cleaned frequently, 5%

oxalic acid). Pump the cleaning solution through the

exchanger, preferably in a backflush mode. After cleaning,

rinse with large amounts of fresh water to dispose of all the

acid. Cleaning materials must be disposed of properly.

The factory-installed strainer screen in front of the water/

brine inlets of the heat exchangers should be cleaned periodi-

cally, depending on condition of the chiller water/brine.

Reconnect the compressor power connections and high-

pressure switch/internal thermostat wiring as on the old com-

pressor. Refer to Fig. 27-30. Following the installation of the

new compressor, tighten all hardware to the following specifi-

cations. (See Table 30.)

Download from Www.Somanuals.com. All Manuals Search And Download.

COMPRESSOR

BASE

Fig. 27 — Typical Compressor Mounting — All Sizes

LEGEND

HPS — High-Pressure Switch

Fig. 28 — Compressor Wiring

COMP B2

COMP B1

COMP A2

COMP A1

COMP A2

Fig. 30 — Compressor Location — 30RA032-055

Fig. 29 — Compressor Location — 30RA010-030

Download from Www.Somanuals.com. All Manuals Search And Download.

surfaces can be easily damaged (fin edges bent over) if the tool

is applied across the fins.

Check Oil Charge — Compressors are factory charged

with oil as shown in Table 31.

NOTE: Use of a water stream, such as a garden hose, against a

surface loaded coil will drive the fibers and dirt into the coil.

This will make cleaning efforts more difficult. Surface loaded

fibers must be completely removed prior to using low velocity

clean water rinse.

Periodic Clean Water Rinse — A periodic clean water rinse is

very beneficial for coils that are applied in coastal or industrial

environments. However, it is very important that the water

rinse is made with very low velocity water stream to avoid

damaging the fin edges. Monthly cleaning as described below

is recommended.

Routine Cleaning of Coil Surfaces — Monthly cleaning with

Environmentally Sound Coil Cleaner is essential to extend the

life of coils. It is recommended that all coils, including stan-

dard aluminum, pre-coated, copper/copper or E-coated coils

are cleaned with the Environmentally Sound Coil Cleaner as

described below. Coil cleaning should be part of the units regu-

larly scheduled maintenance procedures to ensure long life of

the coil. Failure to clean the coils may result in reduced dura-

bility in the environment.

Table 31 — Oil Charge

AMOUNT

COMPRESSOR

pints (liters)

SM110

SM115, SM125

SM160

5.7 (2.7)

6.7 (3.2)

7.0 (3.3)

11.6 (5.5)

SM185

If oil is visible in the compressor sight glass, check unit for

operating readiness as described in Pre-Start-Up, System

Check section (page 74), then start the unit. Observe oil level

and add oil if required, to bring oil level in compressor

crankcase up to between ¹/₄and ³/₄of sight glass during steady

operation.

To Add Oil:

1. Check the oil level with all compressors in the circuit run-

ning in a stabilized condition or immediately after com-

pressor shutdown. The oil level should be at ¹/₃of the oil

sight glass immediately after shutdown.

Environmentally Sound Coil Cleaner is non-flammable,

hypo allergenic, non-bacterial, USDA accepted biodegradable

and 100% ecologically safe agent that will not harm the coil or

surrounding components such as electrical wiring, painted

metal surfaces or insulation. Use of non-recommended coil

cleaners is strongly discouraged since coil and unit durability

could be affected.

2. Using a suitable pump, add oil while compressor(s) are

running through the low side ¼ in. Schraeder fitting on

the compressor. For SM110 models, this fitting is directly

above the suction line connection. For all other compres-

sor models, this fitting is near the oil equalization line fit-

ting at the same height as the suction line connection.

3. Run all compressors on the circuit for at least 15 minutes

and check the oil level.

Use only Sterling-approved compressor oil:

Totaline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . PP680002

Penreco . . . . . . . . . . . . . . . . . . . . . . . . . . . .Sontex 160 LT-A

Do not reuse drained oil, and do not use any oil that has

been exposed to the atmosphere.

Environmentally Sound Coil Cleaner Application

Equipment

•

2¹/₂Gallon Garden Sprayer

Water Rinse with Low Velocity Spray Nozzle

Environmentally Sound Coil Cleaner Application

Instructions

•

Although Environmentally Sound Coil Cleaner is harm-

less to humans, animals, and marine life, proper eye pro-

tection such as safety glasses is recommended during

mixing and application.

Condenser Section and Coils

COIL CLEANING — For standard aluminum, copper and

pre-coated aluminum fin coils, clean the coils with a vacuum

cleaner, fresh water, compressed air, or a bristle brush (not

wire). Units installed in corrosive environments should have

coil cleaning as part of a planned maintenance schedule. In this

type of application, all accumulations of dirt should be cleaned

off the coil. When condenser cleaning is complete, enter “Yes”

for coil cleaning maintenance done (CL.MN) value under Run

Status.

•

Remove all surface loaded fibers and dirt with a vacuum

cleaner as described above.

Thoroughly wet finned surfaces with clean water and a

low velocity garden hose being careful not to bend fins.

Mix Environmentally Sound Coil Cleaner in a 2¹/₂gallon

garden sprayer according to the instructions included

with the Enzyme Cleaner. The optimum solution tem-

perature is 100 F.

NOTE: DO NOT USE water in excess of 130 F as the enzy-

matic activity will be destroyed.

•

Thoroughly apply Environmentally Sound Coil Cleaner

solution to all coil surfaces including finned area, tube

sheets and coil headers.

Hold garden sprayer nozzle close to finned areas and

apply cleaner with a vertical, up-and-down motion.

Avoid spraying in horizontal pattern to minimize poten-

tial for fin damage.

Ensure cleaner thoroughly penetrates deep into finned

areas.

Interior and exterior finned areas must be thoroughly

cleaned.

Finned surfaces should remain wet with cleaning solu-

tion for 10 minutes.

Ensure surfaces are not allowed to dry before rinsing.

Reapply cleaner as needed to ensure 10-minute satura-

tion is achieved.

Do not use high-pressure water or air to clean coils — fin

damage may result.

•

CLEANING E-COATED COILS — Follow the outlined pro-

cedure below for proper care, cleaning and maintenance of

E-coated aluminum or copper fin coils:

Coil Maintenance and Cleaning Recommendations — Rou-

tine cleaning of coil surfaces is essential to maintain proper

operation of the unit. Elimination of contamination and

removal of harmful residues will greatly increase the life of the

coil and extend the life of the unit.

Remove Surface Loaded Fibers — Surface loaded fibers or

dirt should be removed with a vacuum cleaner. If a vacuum

cleaner is not available, a soft brush may be used. In either

case, the tool should be applied in the direction of the fins. Coil

•

Download from Www.Somanuals.com. All Manuals Search And Download.

•

Thoroughly rinse all surfaces with low velocity clean

water using downward rinsing motion of water spray

nozzle. Protect fins from damage from the spray nozzle.

CONTROL

ACCESS

Harsh Chemical and Acid Cleaners — Harsh chemical,

household bleach or acid cleaners should not be used to

clean outdoor or indoors coils of any kind. These cleaners

can be very difficult to rinse out of the coil and can acceler-

ate corrosion at the fin/tube interface where dissimilar

materials are in contact. If there is dirt below the surface of

the coil, use the Environmentally Sound Coil Cleaner as

described above.

High Velocity Water or Compressed Air — High veloc-

ity water from a pressure washer, garden hose or com-

pressed air should never be used to clean a coil. The force

of the water or air jet will bend the fin edges and increase

airside pressure drop. Reduced unit performance or nui-

sance unit shutdown may occur.

PUMP

ACCESS

SERVICE

DOOR

Fig. 31 — 30RA Access Panels

CONDENSER SECTION — Condenser fan motors and fans

can be serviced by removal of outlet grilles or side panels. See

Fig. 31. Be sure the wire fan guard is in place over each fan be-

fore starting unit. See Fig. 32 and 33 for proper fan adjustment.

Fan mounting system is designed for fan to drop all the way on

the motor shaft to be correctly located in the orifice. Tighten

fan hub securely on motor shaft with setscrews which bear

against the key. Be sure to replace the plastic fan cap and se-

cure in place with the four locking clips to keep water and de-

bris out of shaft area.

FAN BLADE BOTTOMS

OUT ON MOTOR SHAFT

Check Refrigerant Feed Components

THERMOSTATIC EXPANSION VALVE (TXV) — The TXV

controls the flow of liquid refrigerant to the cooler by main-

taining constant superheat of vapor leaving the cooler. There is

one valve per refrigerant circuit. The valve(s) is activated by a

temperature-sensing bulb(s) strapped to the suction line(s). For

proper TXV sensing bulb location, see Fig. 34.

The valve is factory-set to maintain between 8 and 12 F

(4.4 and 6.7 C) of superheat entering the compressor(s). Ele-

vate head pressure to 280 psig (1930 kPa) by blocking the air-

flow through the condenser. Check the superheat during opera-

tion after conditions have stabilized. A factory-installed tem-

perature well is in each suction line for this purpose. If

necessary, adjust the superheat to prevent refrigerant floodback

to the compressor. Adjust TXVs ¹/₂turn at a time, allowing the

circuit to stabilize between adjustments. Turn stem counter-

clockwise to decrease superheat and clockwise to increase su-

perheat.

Fig. 32 — Condenser-Fan Mounting

PLASTIC FAN

PROPELLER

CLEARANCE OF 0.25 INCHES

(6.4 MM) FOR STANDARD

CONDENSER FANS

FILTER DRIER — The function of the filter drier is to main-

tain a clean, dry system. The moisture indicator (described

below) indicates any need to change the filter drier. The filter

drier is a sealed-type drier. When the drier needs to be

changed, the entire filter drier must be replaced.

NOTE: Dual circuit (032-055 sizes) units have 1 filter drier per

circuit.

FAN DECK

SURFACE

FAN ORIFICE

Fig. 33 — Condenser-Fan Position (Standard Fan)

MOISTURE-LIQUID INDICATOR — The indicator is located

immediately ahead of the TXV to provide an indication of the

refrigerant moisture content. It also provides a sight glass for

refrigerant liquid. Clear flow of liquid refrigerant (at full unit

loading) indicates sufficient charge in the system. Bubbles in the

sight glass (at full unit loading) indicate an undercharged system

or the presence of noncondensables. Moisture in the system,

measured in parts per million (ppm), changes the color of the

indicator as follows:

The unit must be in operation at least 12 hours before the

moisture indicator gives an accurate reading, and must be in

contact with liquid refrigerant. At the first sign of moisture in

the system, change the corresponding filter drier.

NOTE: Dual circuit (032-055 sizes) units have one indicator

per circuit.

MINIMUM LOAD VALVE — On units equipped with the

factory-installed capacity reduction option, a solenoid valve

(minimum load valve) is located between the discharge line

and the cooler entering-refrigerant line. The MBB cycles the

solenoid to perform minimum load valve function.

Green (safe) —Moisture is below 45 ppm

Yellow-Green (caution) — 45 to 130 ppm

Yellow (wet) — above 130 ppm

Download from Www.Somanuals.com. All Manuals Search And Download.

TXV SENSOR

LOCATION

TXV SENSOR

LOCATION

Fig. 34 — Mounting Locations for TXV Sensing Bulb

The amount of capacity reduction achieved by the mini-

mum load valve is not adjustable. The total unit capacity with

the minimum load valve is shown in Table 7.

PRESSURE RELIEF DEVICES — All units have one pres-

sure relief device per circuit located in the liquid line which re-

lieves at 210 F (100 C).

The high-pressure switch is mounted in the discharge side

of each compressor. A snubber is provided between the com-

pressor discharge manifold and the high-pressure switch to pre-

vent pressure pulsations from damaging the switch.

The high-pressure switch is mounted in the discharge line of

each compressor. If an unsafe, high-pressure condition should

exist, the switch opens and shuts off the affected compressor.

The compressor feedback signal to J9 of the MBB then opens

causing an alert condition. The MBB prevents the compressor

from restarting until the alert condition is reset. The switch

should open at the pressure corresponding to the appropriate

switch setting as shown in Table 32.

Compressor and Unit Protective Devices

MANUAL STARTER — There is one manual starter per

compressor in each unit. It protects the compressor(s) against

overloading, locked rotor conditions, and primary single phas-

ing. If the manual starter trips, determine the cause and correct

it before resetting.

Manual starters are factory set; field adjustment should not

be required. Manual starters are also factory installed for each

condenser fan motor and factory-installed chilled water pump.

NOTE: Two-speed condenser fan motors on sizes 010-018 and

032-040 have manual starters so that the motor is protected

while running in both low and high speed modes. Refer to

Appendix B for factory settings.

COMPRESSOR INTERNAL THERMAL PROTECTION —

All models include internal compressor protection. Models

using the SM110 compressor (015 50 Hz and 018 60 Hz) have

internal line break overloads. All other compressor models

have internal discharge temperature thermostats that are wired

in series with the compressor high pressure switch in the com-

pressor motor junction box. The thermostat opens and shuts off

the compressor if the discharge gas temperature exceeds 275 F

(135 C). The thermostat will automatically reset when the tem-

perature drops below a preset level, however, the control mod-

ule will keep the unit locked off until the alert condition is

reset.

Table 32 — Factory Settings, High-Pressure

Switch (Fixed)

CUTOUT

Psig kPa

426 2937 48 324 20 2206 138

CUT-IN

UNIT

30RA

Psig

kPa

Clear the alarm using the Scrolling Marquee display as de-

scribed on page 42. The unit should restart after the compressor

anti-short-cycle delay, built into the unit control module,

expires.

PRESSURE TRANSDUCERS — Each refrigerant circuit is

equipped with a suction and discharge pressure transducer. The

transducers are NOT the same part number. The discharge

pressure transducer is the universal pressure transducer while

the suction pressure transducer is a discrete low pressure trans-

ducer. These inputs to the MBB are not only used to monitor

the status of the unit, but to also maintain operation of the chill-

er within the compressor manufacturer's specified limits. The

input to the MBB from the suction pressure transducer is also

used to protect the compressor from operating at low pressure

conditions. In some cases, the unit may not be able to run at full

capacity. The control module will automatically reduce the ca-

pacity of a circuit as needed to maintain specified maximum/

minimum operating pressures.

Check Unit Safeties

HIGH-PRESSURE SWITCH — A high-pressure switch is

provided to protect each compressor and refrigeration system

from unsafe high pressure conditions. See Table 32 for high-

pressure switch settings.

Download from Www.Somanuals.com. All Manuals Search And Download.

COOLER FREEZE-UP PROTECTION

the compressor section behind a panel with a vent plug so that

outside air flows across the sensor tip.

REPLACING THERMISTORS T1 and T2 — Add a small

amount of thermal conductive grease to the thermistor well and

end of probe. Thermistors are friction-fit thermistors, which

must be slipped into receivers in the cooler (010-030) or fluid

piping (032-055). For sizes 032-055, tighten the retaining nut

¼ turn past finger tight. See Fig. 35.

THERMISTOR/TEMPERATURE SENSOR CHECK — A

high quality digital volt-ohmmeter is required to perform this

check.

1. Connect the digital voltmeter across the appropriate

themistor terminals at the J8 terminal strip on the Main

Base Board (see Fig. 36).

2. Using the voltage reading obtained, read the sensor tem-

perature from Tables 33-36.

3. To check thermistor accuracy, measure temperature at

probe location with an accurate thermocouple-type tem-

perature measuring instrument. Insulate thermocouple to

avoid ambient temperatures from influencing reading.

Temperature measured by thermocouple and temperature

determined from thermistor voltage reading should be

close, ± 5° F (3° C) if care was taken in applying thermo-

couple and taking readings.

If a more accurate check is required, unit must be shut down

and thermistor removed and checked at a known temperature

(freezing point or boiling point of water) using either voltage

drop measured across thermistor at the J8 terminal, by deter-

mining the resistance with chiller shut down and thermistor

disconnected from J8. Compare the values determined with the

value read by the control in the Temperatures mode using the

Scrolling Marquee display.

On medium temperature brine units, the brine must be

properly mixed to prevent freezing at a temperature of at

least 15 F (8.3 C) below the leaving-fluid temperature set

point. Failure to provide the proper brine mixture is consid-

ered abuse and may void the Sterling warranty.

The Main Base Board (MBB) monitors leaving fluid tem-

perature at all times. The MBB will rapidly remove stages of

capacity as necessary to prevent freezing conditions due to the

rapid loss of load or low cooler fluid flow.

When the cooler is exposed to lower ambient temperatures

(34 F [1° C] or below), freeze-up protection is required using

inhibited ethylene glycol.

HEATER CABLE — Optional factory-installed cooler and/or

hydronic package heaters are cycled based on the input from

the outside-air temperature sensor. These heaters, when in-

stalled, are designed to protect the cooler and/or hydronic pack-

age from freezing down to –20 F (–29 C). Power for these heat-

ers is supplied from the main unit power.

The input from the low pressure transducer provides a back-

up cooler freeze protection package. The MBB shuts down the

unit when a low pressure condition exists that could cause the

cooler to freeze up.

Do not disconnect main unit power when servicing com-

pressor(s) if ambient temperature is below 40 F (4.4 C).

Each compressor manual starter has a lockout feature.

Depress the Stop Button and pull the lockout tab from the

start button. Secure lock in place. If power to the unit must

be off for a prolonged period, drain the cooler, hydronic

package (if installed) and internal piping. Add glycol

according to WINTER SHUTDOWN Step 2 below.

Pressure Transducers — Suction and discharge pres-

sure transducers are installed on each circuit. No pressure

transducer calibration is required. The transducers operate on a

5 vdc supply, which is generated by the Main Base Board

(MBB). See Fig. 36 for transducer connections to the J8 con-

nector on the MBB.

WINTER SHUTDOWN — At the end of the cooling season:

1. Drain the water/brine from the cooler, hydronic package

(if installed) and internal piping.

2. Fill the package with at least 2 gallons (7.6 L) of ethylene

glycol or other suitable uninhibited antifreeze solution to

prevent any residual water in the cooler and hydronic

package/piping from freezing.

3. At the beginning of the next cooling season, refill the

cooler and add the recommended inhibitor.

TROUBLESHOOTING — If a transducer is suspected of be-

ing faulty, first check the supply voltage to transducer. Supply

voltage should be 5 vdc ± 0.2 v. If supply voltage is correct,

compare pressure reading displayed on the Scrolling Marquee

display module against pressure shown on a calibrated pressure

gauge. Suction pressure should be within ± 2 psig. Discharge

pressure should be within ± 5 psig. If the two readings are not

reasonably close, replace the pressure transducer.

Flow Sensor — A flow switch is factory installed in the

leaving fluid piping of all models. If the unit is equipped with

an optional hydronic system, the flow switch is inside the

pump cabinet. If nuisance trips of the sensor are occurring, fol-

low the steps below to correct the situation:

1. Check to confirm that the factory installed strainer is

clean. Use the blow-down valve provided or remove the

screen and clean it. For the case of VFD controlled

pumps, ensure that the minimum speed setting has not

been changed.

2. Measure the pressure drop across the cooler or cooler/

pump system and compare this to the system requirements.

3. Verify that cable connections at the switch and at the ter-

minal block are secure.

Thermistors — Electronic control uses up to five 5 kΩ

thermistors to sense temperatures used to control operation of

the chiller. Thermistors T1, T2 and T9 are identical in their

temperature and voltage drop performance. Accessory return

gas thermistors are also 5 kΩ thermistors used to troubleshoot

TXV superheat settings. Thermistor T10 has a 10 kΩ input

channel and has a different set of temperature vs. resistance and

voltage drop performance. Resistance at various temperatures

are listed in Tables 33-36.

NOTE: For dual chiller operation, the control automatically

configures the T10 input channel to be a 5 kΩ channel. A

HH79NZ014 or HH79NZ029 thermistor should be used for

dual chiller configurations.

4. For factory-installed hydronic systems, verify that:

Thermistor pin connection points are shown in Table 2. Ther-

mistor T1 is located in a well at the bottom of the brazed plate

heat exchanger for sizes 010-030 and in the leaving fluid pip-

ing for sizes 032-055.

Thermistor T2 is located in a well at the top of the brazed

plate heat exchanger for sizes 010-030 and in the entering fluid

piping for sizes 032-055. Thermistor T9 is factory installed in

• All air has been purged from the system

• Circuit setter balance valve has been correctly set

5. Pump impeller has been improperly trimmed and is not

providing sufficient flow.

6. Wrong pump motor rotation. Pump must rotate clockwise

when viewed from motor end of pump.

Download from Www.Somanuals.com. All Manuals Search And Download.

Table 33 — 5K Thermistor Temperatures (°F) vs. Resistance/Voltage Drop

(Voltage Drop for Entering, Leaving Water and Outside-Air Thermistors T1, T2, T9)

VOLTAGE

DROP

(V)

VOLTAGE

DROP

(V)

VOLTAGE

DROP

(V)

TEMP

(F)

RESISTANCE

(Ohms)

TEMP

(F)

RESISTANCE

(Ohms)

TEMP

(F)

RESISTANCE

(Ohms)

1.982

1.956

1.930

1.905

1.879

1.854

1.829

1.804

1.779

1.754

1.729

1.705

1.681

1.656

1.632

1.609

1.585

1.562

1.538

1.516

1.493

1.470

1.448

1.426

1.404

1.382

1.361

1.340

1.319

1.298

1.278

1.257

1.237

1.217

1.198

1.179

1.160

1.141

1.122

1.104

1.086

1.068

1.051

1.033

1.016

0.999

0.983

0.966

0.950

0.934

0.918

0.903

0.888

0.873

0.858

0.843

0.829

0.815

0.801

0.787

0.774

0.761

0.748

0.735

0.723

0.710

0.698

0.686

0.674

0.663

0.651

0.640

0.629

0.618

0.608

0.597

0.587

0.577

0.567

0.557

0.548

0.538

0.529

0.520

7,686

7,665

7,468

7,277

7,091

6,911

6,735

6,564

6,399

6,238

6,081

5,929

5,781

5,637

5,497

5,361

5,229

5,101

4,976

4,855

4,737

4,622

4,511

4,403

4,298

4,196

4,096

4,000

3,906

3,814

3,726

3,640

3,556

3,474

3,395

3,318

3,243

3,170

3,099

3,031

2,964

2,898

2,835

2,773

2,713

2,655

2,597

2,542

2,488

2,436

2,385

2,335

2,286

2,239

2,192

2,147

2,103

2,060

2,018

1,977

1,937

1,898

1,860

1,822

1,786

1,750

1,715

1,680

1,647

1,614

1,582

1,550

1,519

1,489

1,459

1,430

1,401

1,373

1,345

1,318

1,291

1,265

1,240

1,214

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

164

165

166

167

168

169

170

171

172

173

174

175

176

177

178

179

180

181

182

183

184

185

186

187

188

189

190

191

192

193

194

195

196

197

198

199

200

201

202

203

204

205

206

207

208

209

210

211

212

213

214

215

216

217

218

219

220

221

222

223

224

225

0.511

0.502

0.494

0.485

0.477

0.469

0.461

0.453

0.445

0.438

0.430

0.423

0.416

0.408

0.402

0.395

0.388

0.381

0.375

0.369

0.362

0.356

0.350

0.344

0.339

0.333

0.327

0.322

0.317

0.311

0.306

0.301

0.296

0.291

0.286

0.282

0.277

0.272

0.268

0.264

0.259

0.255

0.251

0.247

0.243

0.239

0.235

0.231

0.228

0.224

0.220

0.217

0.213

0.210

0.206

0.203

0.200

0.197

0.194

0.191

0.188

0.185

0.182

0.179

0.176

0.173

0.171

0.168

0.165

0.163

0.160

0.158

0.155

0.153

0.151

0.148

0.146

0.144

0.142

0.140

0.138

0.135

0.133

1,190

1,165

1,141

1,118

1,095

1,072

1,050

1,029

1,007

986

965

945

925

906

887

868

850

832

815

798

782

765

750

734

719

705

690

677

663

650

638

626

614

602

591

581

570

561

551

542

533

524

516

508

501

494

487

480

473

467

461

456

450

445

439

434

429

424

419

415

410

405

401

396

391

386

382

377

372

367

361

356

350

344

338

332

325

318

311

304

297

289

282

–25

–24

–23

–22

–21

–20

–19

–18

–17

–16

–15

–14

–13

–12

–11

–10

–9

–8

–7

–6

–5

–4

–3

–2

–1

3.699

3.689

3.679

3.668

3.658

3.647

3.636

3.624

3.613

3.601

3.588

3.576

3.563

3.550

3.536

3.523

3.509

3.494

3.480

3.465

3.450

3.434

3.418

3.402

3.386

3.369

3.352

3.335

3.317

3.299

3.281

3.262

3.243

3.224

3.205

3.185

3.165

3.145

3.124

3.103

3.082

3.060

3.038

3.016

2.994

2.972

2.949

2.926

2.903

2.879

2.856

2.832

2.808

2.784

2.759

2.735

2.710

2.685

2.660

2.634

2.609

2.583

2.558

2.532

2.506

2.480

2.454

2.428

2.402

2.376

2.349

2.323

2.296

2.270

2.244

2.217

2.191

2.165

2.138

2.112

2.086

2.060

2.034

2.008

98,010

94,707

91,522

88,449

85,486

82,627

79,871

77,212

74,648

72,175

69,790

67,490

65,272

63,133

61,070

59,081

57,162

55,311

53,526

51,804

50,143

48,541

46,996

45,505

44,066

42,679

41,339

40,047

38,800

37,596

36,435

35,313

34,231

33,185

32,176

31,202

30,260

29,351

28,473

27,624

26,804

26,011

25,245

24,505

23,789

23,096

22,427

21,779

21,153

20,547

19,960

19,393

18,843

18,311

17,796

17,297

16,814

16,346

15,892

15,453

15,027

14,614

14,214

13,826

13,449

13,084

12,730

12,387

12,053

11,730

11,416

11,112

10,816

10,529

10,250

9,979

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

9,717

9,461

9,213

8,973

8,739

8,511

8,291

8,076

Download from Www.Somanuals.com. All Manuals Search And Download.

Table 34 — 5K Thermistor Temperatures (°C) vs. Resistance/Voltage Drop

(Voltage Drop for Entering, Leaving Water and Outside-Air Thermistors T1, T2, T9)

VOLTAGE

DROP

(V)

VOLTAGE

DROP

(V)

VOLTAGE

DROP

(V)

TEMP

(C)

RESISTANCE

(Ohms)

TEMP

(C)

RESISTANCE

(Ohms)

TEMP

(C)

RESISTANCE

(Ohms)

1.982

1.935

1.889

1.844

1.799

1.754

1.710

1.666

1.623

1.580

1.538

1.497

1.457

1.417

1.378

1.340

1.302

1.265

1.229

1.194

1.160

1.126

1.093

1.061

1.030

0.999

0.969

0.940

0.912

0.885

0.858

0.832

0.807

0.782

0.758

0.735

0.713

0.691

0.669

0.649

0.629

0.610

0.591

0.573

0.555

0.538

0.522

7,855

7,499

7,161

6,840

6,536

6,246

5,971

5,710

5,461

5,225

5,000

4,786

4,583

4,389

4,204

4,028

3,861

3,701

3,549

3,404

3,266

3,134

3,008

2,888

2,773

2,663

2,559

2,459

2,363

2,272

2,184

2,101

2,021

1,944

1,871

1,801

1,734

1,670

1,609

1,550

1,493

1,439

1,387

1,337

1,290

1,244

1,200

100

101

102

103

104

105

106

107

0.506

0.490

0.475

0.461

0.447

0.433

0.420

0.407

0.395

0.383

0.371

0.360

0.349

0.339

0.329

0.319

0.309

0.300

0.291

0.283

0.274

0.266

0.258

0.251

0.244

0.237

0.230

0.223

0.217

0.211

0.204

0.199

0.193

0.188

0.182

0.177

0.172

0.168

0.163

0.158

0.154

0.150

0.146

0.142

0.138

0.134

1,158

1,118

1,079

1,041

1,006

971

938

906

876

836

805

775

747

719

693

669

645

623

602

583

564

547

531

516

502

489

477

466

456

446

436

427

419

410

402

393

385

376

367

357

346

335

324

312

299

285

–32

3.705

3.687

3.668

3.649

3.629

3.608

3.586

3.563

3.539

3.514

3.489

3.462

3.434

3.406

3.376

3.345

3.313

3.281

3.247

3.212

3.177

3.140

3.103

3.065

3.025

2.985

2.945

2.903

2.860

2.817

2.774

2.730

2.685

2.639

2.593

2.547

2.500

2.454

2.407

2.360

2.312

2.265

2.217

2.170

2.123

2.076

2.029

100,260

94,165

88,480

83,170

78,125

73,580

69,250

65,205

61,420

57,875

54,555

51,450

48,536

45,807

43,247

40,845

38,592

38,476

34,489

32,621

30,866

29,216

27,633

26,202

24,827

23,532

22,313

21,163

20,079

19,058

18,094

17,184

16,325

15,515

14,749

14,026

13,342

12,696

12,085

11,506

10,959

10,441

9,949

–31

–30

–29

–28

–27

–26

–25

–24

–23

–22

–21

–20

–19

–18

–17

–16

–15

–14

–13

–12

–11

–10

–9

–8

–7

–6

–5

–4

–3

–2

–1

9,485

9,044

8,627

8,231

Download from Www.Somanuals.com. All Manuals Search And Download.

Table 35 — 10K Thermistor Temperature (°F) vs. Resistance/Voltage Drop

(For Thermistor T10)

VOLTAGE

DROP

(V)

VOLTAGE

DROP

(V)

VOLTAGE

DROP

(V)

TEMP

(F)

RESISTANCE

(Ohms)

TEMP

(F)

RESISTANCE

(Ohms)

TEMP

(F)

RESISTANCE

(Ohms)

–25

–24

–23

–22

–21

–20

–19

–18

–17

–16

–15

–14

–13

–12

–11

–10

–9

–8

–7

–6

–5

–4

–3

–2

–1

4.758

4.750

4.741

4.733

4.724

4.715

4.705

4.696

4.686

4.676

4.665

4.655

4.644

4.633

4.621

4.609

4.597

4.585

4.572

4.560

4.546

4.533

4.519

4.505

4.490

4.476

4.461

4.445

4.429

4.413

4.397

4.380

4.363

4.346

4.328

4.310

4.292

4.273

4.254

4.235

4.215

4.195

4.174

4.153

4.132

4.111

4.089

4.067

4.044

4.021

3.998

3.975

3.951

3.927

3.903

3.878

3.853

3.828

3.802

3.776

3.750

3.723

3.697

3.670

3.654

3.615

3.587

3.559

3.531

3.503

3.474

3.445

3.416

3.387

3.357

3.328

3.298

3.268

3.238

3.208

3.178

3.147

3.117

3.086

3.056

3.025

196,453

189,692

183,300

177,000

171,079

165,238

159,717

154,344

149,194

144,250

139,443

134,891

130,402

126,183

122,018

118,076

114,236

110,549

107,006

103,558

100,287

97,060

94,020

91,019

88,171

85,396

82,729

80,162

77,662

75,286

72,940

70,727

68,542

66,465

64,439

62,491

60,612

58,781

57,039

55,319

53,693

52,086

50,557

49,065

47,627

46,240

44,888

43,598

42,324

41,118

39,926

38,790

37,681

36,610

35,577

34,569

33,606

32,654

31,752

30,860

30,009

29,177

28,373

27,597

26,838

26,113

25,396

24,715

24,042

23,399

22,770

22,161

21,573

20,998

20,447

19,903

19,386

18,874

18,384

17,904

17,441

16,991

16,552

16,131

15,714

15,317

2.994

2.963

2.932

2.901

2.870

2.839

2.808

2.777

2.746

2.715

2.684

2.653

2.622

2.592

2.561

2.530

2.500

2.470

2.439

2.409

2.379

2.349

2.319

2.290

2.260

2.231

2.202

2.173

2.144

2.115

2.087

2.059

2.030

2.003

1.975

1.948

1.921

1.894

1.867

1.841

1.815

1.789

1.763

1.738

1.713

1.688

1.663

1.639

1.615

1.591

1.567

1.544

1.521

1.498

1.475

1.453

1.431

1.409

1.387

1.366

1.345

1.324

1.304

1.284

1.264

1.244

1.225

1.206

1.187

1.168

1.150

1.132

1.114

1.096

1.079

1.062

1.045

1.028

1.012

0.996

0.980

0.965

0.949

0.934

0.919

0.905

14,925

14,549

14,180

13,824

13,478

13,139

12,814

12,493

12,187

11,884

11,593

11,308

11,031

10,764

10,501

10,249

10,000

9,762

9,526

9,300

9,078

8,862

8,653

8,448

8,251

8,056

7,869

7,685

7,507

7,333

7,165

6,999

6,838

6,683

6,530

6,383

6,238

6,098

5,961

5,827

5,698

5,571

5,449

5,327

5,210

5,095

4,984

4,876

4,769

4,666

4,564

4,467

4,370

4,277

4,185

4,096

4,008

3,923

3,840

3,759

3,681

3,603

3,529

3,455

3,383

3,313

3,244

3,178

3,112

3,049

2,986

2,926

2,866

2,809

2,752

2,697

2,643

2,590

2,539

2,488

2,439

2,391

2,343

2,297

2,253

2,209

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

164

165

166

167

168

169

170

171

172

173

174

175

176

177

178

179

180

181

182

183

184

185

186

187

188

189

190

191

192

193

194

195

196

197

198

199

200

201

202

203

204

205

206

207

208

209

210

211

212

213

214

215

216

217

218

219

220

221

222

223

224

225

0.890

0.876

0.862

0.848

0.835

0.821

0.808

0.795

0.782

0.770

0.758

0.745

0.733

0.722

0.710

0.699

0.687

0.676

0.666

0.655

0.645

0.634

0.624

0.614

0.604

0.595

0.585

0.576

0.567

0.558

0.549

0.540

0.532

0.523

0.515

0.507

0.499

0.491

0.483

0.476

0.468

0.461

0.454

0.447

0.440

0.433

0.426

0.419

0.413

0.407

0.400

0.394

0.388

0.382

0.376

0.370

0.365

0.359

0.354

0.349

0.343

0.338

0.333

0.328

0.323

0.318

0.314

0.309

0.305

0.300

0.296

0.292

0.288

0.284

0.279

0.275

0.272

0.268

0.264

2,166

2,124

2,083

2,043

2,003

1,966

1,928

1,891

1,855

1,820

1,786

1,752

1,719

1,687

1,656

1,625

1,594

1,565

1,536

1,508

1,480

1,453

1,426

1,400

1,375

1,350

1,326

1,302

1,278

1,255

1,233

1,211

1,190

1,169

1,148

1,128

1,108

1,089

1,070

1,052

1,033

1,016

998

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

981

964

947

931

915

900

885

870

855

841

827

814

800

787

774

762

749

737

725

714

702

691

680

670

659

649

639

629

620

610

601

592

583

574

566

557

Download from Www.Somanuals.com. All Manuals Search And Download.

Table 36 — 10K Thermistor Temperature (°C) vs. Resistance/Voltage Drop

(For Thermistor T10)

VOLTAGE

DROP

(V)

VOLTAGE

DROP

(V)

VOLTAGE

DROP

(V)

TEMP

(C)

RESISTANCE

(Ohms)

TEMP

(C)

RESISTANCE

(Ohms)

TEMP

(C)

RESISTANCE

(Ohms)

–32

–31

–30

–29

–28

–27

–26

–25

–24

–23

–22

–21

–20

–19

–18

–17

–16

–15

–14

–13

–12

–11

–10

–9

4.762

4.748

4.733

4.716

4.700

4.682

4.663

4.644

4.624

4.602

4.580

4.557

4.533

4.508

4.482

4.455

4.426

4.397

4.367

4.335

4.303

4.269

4.235

4.199

4.162

4.124

4.085

4.044

4.003

3.961

3.917

3.873

3.828

3.781

3.734

3.686

3.637

3.587

3.537

3.485

3.433

3.381

3.328

3.274

3.220

3.165

3.111

200,510

188,340

177,000

166,342

156,404

147,134

138,482

130,402

122,807

115,710

109,075

102,868

97,060

91,588

86,463

81,662

77,162

72,940

68,957

65,219

61,711

58,415

55,319

52,392

49,640

47,052

44,617

42,324

40,153

38,109

36,182

34,367

32,654

31,030

29,498

28,052

26,686

25,396

24,171

23,013

21,918

20,883

19,903

18,972

18,090

17,255

16,464

3.056

3.000

2.944

2.889

2.833

2.777

2.721

2.666

2.610

2.555

2.500

2.445

2.391

2.337

2.284

2.231

2.178

2.127

2.075

2.025

1.975

1.926

1.878

1.830

1.784

1.738

1.692

1.648

1.605

1.562

1.521

1.480

1.439

1.400

1.362

1.324

1.288

1.252

1.217

1.183

1.150

1.117

1.086

1.055

1.025

0.996

0.968

15,714

15,000

14,323

13,681

13,071

12,493

11,942

11,418

10,921

10,449

10,000

9,571

9,164

8,776

8,407

8,056

7,720

7,401

7,096

6,806

6,530

6,266

6,014

5,774

5,546

5,327

5,117

4,918

4,727

4,544

4,370

4,203

4,042

3,889

3,743

3,603

3,469

3,340

3,217

3,099

2,986

2,878

2,774

2,675

2,579

2,488

2,400

0.940

0.913

0.887

0.862

0.837

0.813

0.790

0.767

0.745

0.724

0.703

0.683

0.663

0.645

0.626

0.608

0.591

0.574

0.558

0.542

0.527

0.512

0.497

0.483

0.470

0.457

0.444

0.431

0.419

0.408

0.396

0.386

0.375

0.365

0.355

0.345

0.336

0.327

0.318

0.310

0.302

0.294

0.287

0.279

0.272

0.265

2,315

2,235

2,157

2,083

2,011

1,943

1,876

1,813

1,752

1,693

1,637

1,582

1,530

1,480

1,431

1,385

1,340

1,297

1,255

1,215

1,177

1,140

1,104

1,070

1,037

1,005

974

–8

–7

–6

–5

944

–4

915

–3

889

–2

861

–1

836

811

787

764

742

721

700

100

101

102

103

104

105

106

107

680

661

643

626

609

592

576

561

Download from Www.Somanuals.com. All Manuals Search And Download.

Strainer — Periodic factory-installed strainer cleaning is

required. Pressure drop across strainer in excess of 3 psi

(21 kPa) indicates the need for cleaning. Normal (clean) pres-

sure drop is approximately 1 psi (6.9 kPa). Open the factory-

installed blowdown valve to clean the strainer. If required, shut

the chiller down and remove the strainer screen to clean. When

strainer has been cleaned, enter ‘YES’ for strainer maintenance

done (S.T.MN) [Run Status, PM].

FLUID-SIDE TEMPERATURE SENSORS (T1 AND T2)

NOTE: Dimensions in ( ) are in millimeters.

Motormaster® V Controller — The optional or ac-

cessory Motormaster V controller uses a 0 to 5 vdc signal

input from a pressure transducer attached to the liquid line ser-

vice valve gage port on each circuit. See Fig. 37. The pressure

transducer is connected to terminals 2, 5 and 6 on the control-

ler. The controller is factory configured and requires no field

programming. If a situation arises where the drive does not

function properly, the information provided below and

Table 37 can be used to troubleshoot the drive.

Fig. 35 — Fluid-Side Temperature Sensors

(T1 and T2)

If input power has not been applied to the drive for a period

of time exceeding three years (due to storage, etc.), the

electrolytic DC bus capacitors within the drive can change

internally, resulting in excessive leakage current. This can

result in premature failure of the capacitors if the drive is

operated after such a long period of inactivity or storage. In

order to reform the capacitors and prepare the drive for

operation after a long period of inactivity, apply input

power to the drive for 8 hours prior to actually operating

the motor. Before attempting to operate the drive, motor,

and driven equipment, be sure all procedures pertaining to

installation and wiring have been properly followed.

DO NOT connect incoming AC power to output terminals

T1, T2, and T3! Severe damage to the drive will result. Do

not continuously cycle input power to the drive more than

once every two minutes. Damage to the drive will result.

Fig. 36 — Thermistor Connections to

Main Base Board, J8 Connector

Hazard of electrical shock! Wait three minutes after discon-

necting incoming power before servicing drive. Capacitors

retain charge after power is removed. Drive assembly

includes externally mounted current limiting resistors. Use

extreme caution when servicing the drive.

bring the pressure down to the set point. When the VFD is at

full speed, it acts just like a fixed speed fan.

When the ambient air temperature drops, a fan running at

full speed draws too much air across the condenser coil to

maintain a minimum condensing pressure/temperature. In

these conditions, the VFD will slow down and begin to main-

tain a set point.

The VFD will display the set point as the default. The set

point is displayed in speed as Hz and is configured by the start

command jumper as detailed in Fig. 38.

When configured as shown below, this equipment is

designed to start when it receives line power. Ensure that

all personnel are clear of fans and guards are installed

before applying power.

Motormaster V control can also be configured to follow an

external control system to perform the PI control functions. See

configuration section for details.

The real-time feedback signal (liquid line pressure, in volts)

is displayed by viewing parameter 69. The real-time output fre-

quency is displayed by viewing parameter 71.

SET POINTS — Operating modes are configured for R-22

with a set point of 135 psig on the liquid line.

INSTALLATION — See Fig. 38 for transducer wiring to the

VFD.

GENERAL OPERATION — This control varies condenser

fan speed based on liquid pressure. The control is a Variable

Frequency Drive (VFD) and is only compatible with motors

rated for use with VFDs. The accompanying pressure transduc-

er has a 0 to 5 v output range corresponding to a –40 to 460 psi

range. The VFD provides a 5 v output for the transducer on

pin 6.

This system is a reverse acting, proportional-integral (PI)

control. The VFD will vary the motor speed to drive the liquid

line pressure to the set point during ambient temperatures be-

low 60 F. The set point is lower than a normal operating pres-

sure during summer operation. At higher ambient tempera-

tures, the fan will go to full speed (60 Hz or 50 Hz depending

on model) and remain there since it can not go fast enough to

NOTE: The drive is phase insensitive with respect to incoming

line voltage. This means that the VFD will operate with any

phase sequence of the incoming three-phase voltage.

Download from Www.Somanuals.com. All Manuals Search And Download.

PROGRAMMING

To change password: first enter the current password then

change parameter P44 to the desired password.

To disable automatic control mode and enter manual speed

control mode:

1. Change P05 to ‘01- keypad’.

2. Push UP and DOWN arrow key to set manual speed.

3. Set P05 to ‘05 - R22’ to restore automatic control.

To provide manual start/stop control:

With power removed from VFD, remove start command

jumper and install a switch between the appropriate start termi-

nals as required in Fig 37.

EPM CHIP — The drive uses a electronic programming mod-

ule (EPM) chip to store the program parameters. This is an EE-

PROM memory chip and is accessible from the front of the

VFD. It should not be removed with power applied to the

VFD.

It is strongly recommended that the user NOT change any

programming without consulting Sterling service personnel.

Unit damage may occur from improper programming.

Motormaster V control is completely configured according to

the inputs provided. No additional programming is necessary.

The drive can display 71 program parameters. Parameters

50-60 are monitor functions and cannot be changed. The

remainder of the parameters can be changed after entering a

password.

To enter password and change program values:

1. Press Mode.

2. Upper right decimal point blinks.

LIQUID LINE PRESSURE SET POINT ADJUST-

MENT — Adjusting the set point is not recommended due to

possible interaction with other head pressure software algo-

rithms or controls. In situations where the set point must be

changed, the set point for R-22 is found in P34. A higher value

will result in a higher liquid line set point. Example: increasing

the factory default (P34) set point from 18.0 to 19.0 will in-

crease the liquid line pressure by approximately 10 psi.

LOSS OF SCN COMMUNICATIONS — Sterlco Comfort

Network (SCN) communications with external control

systems can be affected by high frequency electrical noise gen-

erated by the Motormaster V control. Ensure unit is well

grounded to eliminate ground currents along communication

lines.

If communications are lost only while Motormaster V con-

trol is in operation, order a signal isolator (CEAS420876-2)

and power supplies (CEAS221045-01, 2 required) for the SCN

communication line.

Fault Codes — The drive is programmed to automatically re-

start after a fault and will attempt to restart three times after a

fault (the drive will not restart after CF, cF, GF, F1, F2-F9, or

Fo faults). If all three restart attempts are unsuccessful, the

drive will trip into FAULT LOCKOUT (LC), which requires a

manual reset.

3. Display reads “00” (see Fig. 37). To enter the PRO-

GRAM mode to access the parameters, press the Mode

button (see Fig. 37). This will activate the PASSWORD

prompt (if the password has not been disabled). The dis-

play will read “00” and the upper right-hand decimal

point will be blinking.

4. Use the

and

buttons to scroll to the password

value (the factory default password is “111”) and press

the Mode button. Once the correct password value is en-

tered, the display will read “P01”, which indicates that the

PROGRAM mode has been accessed at the beginning of

the parameter menu (P01 is the first parameter).

NOTE: If the display flashes “Er”, the password was incorrect,

and the process to enter the password must be repeated.

5. Press Mode to display present parameter setting.

Upper right decimal point blinks.

Use the

and

buttons to scroll to the desired

parameter number.

Once the desired parameter number is found, press the

Mode button to display the present parameter setting. The up-

per right-hand decimal point will begin blinking, indicating

that the present parameter setting is being displayed, and that it

can be changed by using the up and down buttons. Use

and

to change setting. Press Mode to store new setting.

NOTE: Since faults may be reset as incoming power is cycled,

you may need to observe current fault code before the Sterling

unit control turns off the VFD. Most recent faults can be

accessed using parameter 50. If necessary, remove start jumper

and energize condenser fan contactor using Service Test. This

will allow programming and access to fault history.

Pressing the Mode will store the new setting and also exit

the PROGRAM mode. To change another parameter, press the

Mode key again to re-enter the PROGRAM mode (the param-

eter menu will be accessed at the parameter that was last

viewed or changed before exiting). If the Mode key is pressed

within two minutes of exiting the PROGRAM mode, the pass-

word is not required access the parameters. After two minutes,

the password must be entered in order to access the parameters

again.

Download from Www.Somanuals.com. All Manuals Search And Download.

Mode

DANGER

MMV

TERMINAL

BLOCK

B+

T2 T3 B-

DISPLAY

BUTTONS

Mode

Fig. 37 — Motormaster® V Mode Buttons and Mode Display

MMV

TERMINAL

BLOCK

13A

13B

13C

TXA

TXB

COM

+5V

NOMINAL

VOLTAGE

CONTROL INPUT

(PIN 5)

START

JUMPER

SETPOINT

JUMPER

MODE

REFRIGERANT

208*/230/

460/575

Internal PI control,

0-5V feedback

Internal PI control,

0-5V feedback

Internal PI control,

0-5V feedback

Internal PI control,

0-5V feedback

TB1-TB2

None

208*/230

230

TB13A-TB2

TB13B-TB2

TB13C-TB2

None

R-22

380/415

*At 208 v, the drive can run in either mode.

Fig. 38 — Pressure Transducer and Start Command Jumper Wiring

Download from Www.Somanuals.com. All Manuals Search And Download.

Table 37 — Fault Codes

FAULT CODE

DESCRIPTION

SOLUTION

High Temperature Fault: Ambient temperature is too high;

Cooling fan has failed (if equipped).

Control Fault: A blank EPM, or an EPM with corrupted data Perform a factory reset using Parameter 48 —

has been installed. PROGRAM SELECTION.

Incompatibility Fault: An EPM with an incompatible parame- Either remove the EPM or perform a factory

ter version has been installed.

Check cooling fan operation

reset (Parameter 48) to change the parameter

version of the EPM to match the parameter

version of the drive.

CURRENT LIMIT: The output current has exceeded the

CURRENT LIMIT setting (Parameter 25) and the drive is

Check for loose electrical connections.

Check for faulty condenser fan motor.

reducing the output frequency to reduce the output current. Check Parameter P25 from Table 38 is set cor-

If the drive remains in CURRENT LIMIT too long, it can trip rectly.

into a CURRENT OVERLOAD fault (PF).

Data Fault: User data and OEM defaults in the EPM are

corrupted.

High DC Bus Voltage Fault: Line voltage is too high; Decel- Check line voltage — set P01 appropriately

eration rate is too fast; Overhauling load.

Serial Fault: The watchdog timer has timed out, indicating

that the serial link has been lost.

Restore factory defaults P48, see section

above. If that does not work, replace EPM.

Check serial connection (computer)

Check settings for PXX.

Check settings in communication software to

match PXX.

Low DC Bus Voltage Fault: Line voltage is too low.

Check line voltage — set P01 appropriately

Output Transistor Fault: Phase to phase or phase to ground Reduce boost or increase acceleration values.

short circuit on the output; Failed output transistor; Boost

settings are too high; Acceleration rate is too fast.

If unsuccessful, replace drive.

Current Overload Fault: VFD is undersized for the applica- Check line voltage — set P01 appropriately

tion; Mechanical problem with the driven equipment.

Check for dirty coils

Check for motor bearing failure

Single-phase Fault: Single-phase input power has been

applied to a three-phase drive.

Check input power phasing

EPM Fault: The EPM is missing or damaged.

F2-F9, Fo

Internal Faults: The control board has sensed a problem

Consult factory

Drive display = 60.0 even though it Feedback signal is above set point

is cold outside and it should be run-

ning slower

Check for proper set point

Check liquid line pressure

Drive display = ‘---’ even though

drive should be running

Start jumper is missing

Replace start jumper. See section above

Drive display = 8.0 even though fan Feedback signal is below set point and fan is at minimum

Check for proper set point

Check liquid line pressure

should be running faster

VFD flashes 57 and LCS

speed

Feedback or speed signal lost. Drive will operate at 57 Hz In stand alone mode: Check transducer wiring

until reset or loss of start command. Resetting requires

cycling start command (or power).

and feedback voltage. Feedback voltage dis-

played on P-69. Pin 6 should be 5 v output.

Pin 5 (feedback) should be somewhere

between 0 and 5 v.

Manual Reset — If fault condition has been removed, cycle

power to the chiller to reset the VFD.

•

P54: LOAD — in percent of drives rated output current

rating

P55: VDC INPUT — in percent of maximum input:

100 will indicate full scale which is 5 v

P56 4-20 mA INPUT — in percent of maximum input.

20% = 4 mA, 100% = 20 mA

Troubleshooting — Troubleshooting the Motormaster® V

control requires a combination of observing system operation

and VFD information. The drive provides 2 kinds of trouble-

shooting modes: a status matrix using the 3-digit display

(P57, P58) and real time monitoring of key inputs and outputs.

The collective group is displayed through parameters

50-60 and all values are read-only.

Manual Starter Trip — If the VFD manual starter (MS-FC-

HS, MS-FC-A1 or MS-FC-B1 depending on model) trips,

locate the inrush current protectors (3 round black disks per

motor) and verify their resistance. For units operating at 208 v

or 230 v, these devices should measure approximately 7 ohms.

For all other voltages, they should measure approximately

20 ohms. Check value with mating plug disconnected, power

to chiller off and at ambient temperature (not hot immediately

after stopping VFD). These are standard resistances at 77 F

(25 C). Resistance values decrease at higher temperatures and

increase at lower temperatures.

•

P50: FAULT HISTORY — Last 8 faults

P51: SOFTWARE version

P52: DC BUS VOLTAGE — in percent of nominal.

Usually rated input voltage x 1.4

P53: MOTOR VOLAGE — in percent of rated output

voltage

•

Download from Www.Somanuals.com. All Manuals Search And Download.

Table 38 — Motormaster® V Program Parameters for Operating Modes

MODE

PARAMETERS

DESCRIPTION

P01

P02

P03

P04

Line Voltage: 01 = low line, 02 = high line

Sterlco Freq: 01 = 4 kHz, 02 = 6 kHz, 03 = 8 kHz

Startup mode: flying restart

Stop mode: coast to stop

Standard Speed source: 01= keypad,

04=4-20mA (NO PI), 05= R22, 06=R134a

P05

P06

P08

P09

P10

P11

P12

P13

P14

P15

P16

P17

P19

P20

P21

P22

P23

P24

P25

P26

P27

P28

P29

P30

P31

P32

P33

TB-14 output: 01 = none

TB-30 output: 01 = none

TB-31 Output: 01 = none

TB-13A function sel: 01 = none

TB-13B function sel: 01 = none

TB-13C function sel: 01 = none

TB-15 output: 01 = none

Control: 01 = Terminal strip

Serial link: 02 = enabled 9600,8,N,2 with timer

Units editing: 02 = whole units

Rotation: 01 = forward only, 03 = reverse only

Acceleration time: 10 sec

Deceleration time: 10 sec

DC brake time: 0

DC BRAKE VOLTAGE 0%

Min freq = 8 Hz ~ 100 – 160 rpm

Max freq

Current limit: (%)

Motor overload: 100

Base freq: 60 or 50 Hz

Fixed boost: 0.5% at low frequencies

Accel boost: 0%

Slip compensation: 0%

Preset spd #1: speed if loss of control signal

Preset spd #2: 0

125

100

0.5

110

100

0.5

125

100

0.5

110

100

0.5

Preset spd #3: 0

Preset spd 4 default — R22 set point.

P34

P35

18.0

12.6

18.0

12.6

18.0

12.6

18.0

12.6

TB12-2 open

Preset spd 5 default — R134a set point.

TB12-2 closed

P36

P37

P38

P39

P40

P41

P42

P43

P44

Preset spd 6 default

Preset spd 7 default

Skip bandwidth

Speed scaling

Frequency scaling 50 or 60 Hz

Load scaling: default (not used so NA)

Accel/decel #2: default (not used so NA)

Serial address

200

Password:111

111

Speed at min signal: 8 Hz; used when PID

mode is disabled and 4-20mA input is at 4 mA

Speed at max feedback: 60 or 50 Hz. Used

when PID disabled and 4-20mA input is at 20 mA

P45

P46

P47

P48

P61

P62

P63

P64

P65

P66

P67

P68

Clear history? 01 = maintain. (set to 02 to clear)

Program selection: Program 1 – 12

PI Mode: 05= reverse, 0-5V, 01 = no PID

Min feedback = 0 (0V *10)

Max feedback = 50 (5V * 10)

Proportional gain = 4%

Integral gain = .2

PI acell/decel (set point change filter) = 5

Min alarm

Max alarm

LEGEND

NA — Not Applicable

PID — Proportional Integral Derivative

TB — Terminal Block

Download from Www.Somanuals.com. All Manuals Search And Download.

REPLACING DEFECTIVE MODULES — The Comfort-

Link^™replacement modules are shown in Table 39. If the Main

Base Board (MBB) has been replaced, verify that all configura-

tion data is correct. Follow the Configuration mode table and

verify that all items under sub-modes UNIT, OPT1 and OPT2

are correct. Any additional field-installed accessories or op-

tions (RSET, SLCT sub-modes) should also be verified as well

as any specific time and maintenance schedules.

Refer to the Start-Up Checklist for 30RA Liquid Chillers

(completed at time of original start-up) found in the job folder.

This information is needed later in this procedure. If the check-

list does not exist, fill out the current information in the Config-

uration mode on a new checklist. Tailor the various options and

configurations as needed for this particular installation.

information, each factory-installed hydronic package is sup-

plied with a packet of information supplied by the manufactur-

er, Bell & Gossett. Sterling/Sterlco strongly recommends

that this information be thoroughly reviewed prior to operation

of the chiller.

PUMP PERFORMANCE CHECK — The factory-installed

pumps in the 30RA units are shipped with a single impeller

size available for that pump. The pump was selected based on

the flow and head requirements as provided to Sterling. It is not

uncommon for actual pump duty to be different than what was

anticipated at time of selection. In many cases, it may be desir-

able to make some field modifications to obtain optimum

pump performance.

Before any pump modifications are made, it is recommend-

ed that actual pump performance be verified and compared to

the applicable pump curve. See base unit installation instruc-

tions. This can be done in a variety of ways:

Electrical shock can cause personal injury. Disconnect all

electrical power before servicing.

1. If pump impeller diameter is known:

a. Connect a differential pressure gage across the

pump at the ports provided on the pump volutes.

b. Read GPM from applicable impeller curve.

2. If pump impeller diameter is not known:

1. Check that all power to unit is off. Carefully disconnect

all wires from the defective module by unplugging its

connectors.

2. Remove the defective module by removing its mounting

screws with a Phillips screwdriver, and removing the

module from the control box. Save the screws later use.

3. Verify that the instance jumper (MBB) or address switch-

es (all other modules) exactly match the settings of the

defective module.

NOTE: Handle boards by mounting standoffs only to avoid

electrostatic discharge.

If pump impeller diameter has been trimmed and the size

is not known, it is necessary to determine which impeller

curve to read.

The easiest way to confirm pump performance is to

“dead-head” the pump and read the differential pressure

across the pressure ports on the pump. “Dead-heading”

can be done by shutting the circuit setter valve on the dis-

charge side of the pump.

4. Package the defective module in the carton of the new

module for return to Sterling.

5. Mount the new module in the unit’s control box using a

Phillips screwdriver and the screws saved in Step 2.

6. Reinstall all module connectors. For accessory Navigator

replacement, make sure the plug is installed at TB3 in the

LEN connector.

7. Carefully check all wiring connections before restoring

power.

8. Verify the ENABLE/OFF/REMOTE CONTACT switch

is in the OFF position.

9. Restore control power. Verify that all module red LEDs

blink in unison. Verify that all green LEDs are blinking

and that the Scrolling Marquee or Navigator display is

communicating correctly.

10. Verify all configuration information, settings, set points

and schedules. Return the ENABLE/OFF/REMOTE

CONTACT switch to its previous position.

NOTE: Although not all pumps can be safely “dead-

headed”, centrifugal pumps (such as on the 30RA units)

can be “dead-headed” for short amounts of time. It is rec-

ommended to keep the time short due to excessive heat

build-up in the pump.

Since the “dead-head” condition is a no-flow condition,

the head will correspond to the intersection of an impel-

ler curve with the vertical axis of the pump chart. The

correct impeller diameter is that which corresponds to the

measured head.

3. Once the impeller diameter is known, proceed as in

Step 1.

4. Water flow rate can be determined by using a differential

pressure gage with the Bell & Gossett circuit setter bal-

ance valve calculator. (This information is also provided

in the installation instructions.) This method will not di-

rectly measure pressure differential seen by the pump, but

can be used to “double-check” the pump measurement.

5. Verify that cable connections at the switch and at the ter-

minal block are secure.

Table 39 — Replacement Modules

6. For factory-installed hydronic system, verify that:

REPLACEMENTPART REPLACEMENT PART

MODULE

NO. (with Software) NO. (without Software)

• All air has been purged from the system.

• Circuit setter balance valve has been correctly set.

7. Pump impeller has been improperly trimmed and is not

providing sufficient flow.

8. Wrong pump motor rotation. Pump must rotate clockwise

when viewed from motor end of pump.

PUMP MODIFICATIONS AND IMPELLER TRIMMING

— See applicable section in the Installation instructions.

RESET OF CHILLER WATER FLOW — See applicable sec-

tion in the Installation instructions.

Main Base

30RA501102

HK50AA031

HK50AA029

HK50AA030

Board (MBB)

Scrolling

Marquee

Display

Energy

Management

Module

30GT515218

HK50AA033

HK50AA028

N/A

(EMM)

Navigator

Display

CHANGING OF PUMP SEALS — See Bell & Gossett ser-

vice instruction manual provided with the hydronic package.

Hydronic Package — If the unit is equipped with a

factory-installed hydronic package, consult the information be-

low for proper maintenance and service. In addition to this

Download from Www.Somanuals.com. All Manuals Search And Download.

field-installed accessories, be sure all are properly in-

stalled and wired correctly. Refer to unit wiring diagrams.

2. Use the Scrolling Marquee display to adjust the Cooling

Set Point.

3. Fill chilled fluid circuit with clean water (with recom-

mended inhibitor added) or other non-corrosive fluid to

be cooled. Bleed all air out of the high points of the sys-

tem. If chilled water is to be maintained at a temperature

below 40 F (4.4 C) or outdoor temperatures are expected

to be below 32 F (0° C), a brine of sufficient concentra-

tion must be used to prevent freeze-up at anticipated

suction temperatures. See Table 40.

MAINTENANCE

Recommended Maintenance Schedule — The fol-

lowing are only recommended guidelines. Jobsite conditions

may dictate that maintenance schedule is performed more often

than recommended.

Routine:

For machines with E-coat Condenser Coils:

•

Check condenser coils for debris, clean as necessary

with Sterling approved coil cleaner.

Periodic clean water rinse, especially in coastal and

industrial applications.

•

Every month:

4. Check tightness of all electrical connections.

•

Check condenser coils for debris, clean as necessary

5. Oil should be visible in the compressor sightglass(es).

See Fig. 39. An acceptable oil level in the compressors is

from ¼ to ¾ of sight glass. Adjust the oil level as re-

quired. See Check Oil Charge section on page 60 for

Sterling approved oils.

with Sterling approved coil cleaner.

•

Check moisture indicating sight glass for possible refrig-

erant loss and presence of moisture.

Every 3 months (for all machines):

6. Electrical power source must agree with unit nameplate.

•

Check refrigerant charge.

Check all refrigerant joints and valves for refrigerant

leaks, repair as necessary.

7. All condenser fan and factory installed hydronic package

pump motors are three phase. Check for proper rotation

of condenser fans first BEFORE attempting to start

pumps or compressors. To reverse rotation, interchange

any two of the main incoming power leads.

8. Be sure system is fully charged with refrigerant (see

Check Refrigerant Charge section on page 75).

•

Check chilled water flow switch operation.

Check condenser coils for debris, clean as necessary

with Sterling approved coil cleaner.

Check all condenser fans for proper operation.

Check compressor oil level.

•

Check crankcase heater operation.

9. If unit is a brine unit, check to ensure proper brine con-

centration is used to prevent freezing.

Every 12 months (for all machines):

•

Check all electrical connections, tighten as necessary.

Inspect all contactors and relays, replace as necessary.

Check accuracy of thermistors, replace if greater than

± 2° F (1.2° C) variance from calibrated thermometer.

Obtain and test an oil sample. Change oil only if

necessary.

Check to be sure that the proper concentration of anti-

freeze is present in the chilled water loop, if applicable.

Verify that the chilled water loop is properly treated.

Check refrigerant filter driers for excessive pressure

drop, replace as necessary.

Check chilled water strainers, clean as necessary.

Check cooler heater operation, if equipped.

Check condition of condenser fan blades and that they

are securely fastened to the motor shaft.

Perform Service Test to confirm operation of all

components.

10. Verify proper operation of cooler and hydronic package

heaters (if installed). Heaters operate at the same voltage

as the main incoming power supply and are single phase.

Heater current is approximately .4 amps for 380, 400, 460

and 575 v units. Heater current is approximately .8 amps

for 230 v units.

•

Table 40 — Minimum Cooler Flow Rates and

•

Minimum Loop Volume

COOLER MINIMUM

FLOW

MINIMUM COOLER

LOOP VOLUME

UNIT SIZE

30RA

•

Gpm

L/s

.76

Gal.

010

015

018

022

025

030

035

040

042

045

050

055

151.2

207.9

181.4

245.7

268.3

309.3

393.1

449.8

427.1

487.6

536.6

616.1

1.01

1.20

1.64

1.83

2.08

2.65

2.80

3.02

3.28

3.59

4.10

•

Check for excessive cooler approach (Leaving Chilled

Water Temperature — Saturated Suction Temperature)

which may indicate fouling. Clean cooler vessel if

necessary.

102

113

119

129

142

163

PRE-START-UP

IMPORTANT: Before beginning Pre-Start-Up or Start-Up,

complete Start-Up Checklist for 30RA Liquid Chiller at

end of this publication (page CL-1 to CL-8). The Checklist

assures proper start-up of a unit, and provides a record of

unit condition, application requirements, system informa-

tion, and operation at initial start-up.

START-UP AND OPERATION

NOTE: Refer to Start-Up Checklist on pages CL-1 to CL-8.

Actual Start-Up — Actual start-up should be done only

under supervision of a qualified refrigeration mechanic.

Do not attempt to start the chiller until following checks

have been completed.

1. Be sure all service valves are open.

2. Using the Scrolling Marquee display, set leaving-fluid set

point (CSP.1) [Set Point, COOL]. No cooling range ad-

justment is necessary.

3. Start chilled fluid pump (if not configured for cooler

pump control).

System Check

1. Check all auxiliary components, such as chilled fluid

pumps, air-handling equipment, or other equipment to

which the chiller supplies liquid. Consult manufacturer's

instructions. Verify that any pump interlock contacts have

been properly installed. If the unit If the unit has

4. Turn ENABLE/OFF/REMOTE CONTACT switch to

ENABLE position.

Download from Www.Somanuals.com. All Manuals Search And Download.

COMPRESSOR OIL

SIGHT GLASS

Fig. 39 — Compressor Connections and Oil Sight Glass Location

5. Allow unit to operate and confirm that everything is func-

tioning properly. Check to see that leaving fluid tempera-

ture agrees with leaving set point (CSP.1 or CSP.2), or if

reset is used, with the control point (CTPT) [Run Status,

VIEW].

lower right of the compressor junction box for all other com-

pressor models.

Never charge liquid into low-pressure side of system. Do

not overcharge. Overcharging results in higher discharge

pressure, possible compressor damage, and higher power

consumption. During charging or removal of refrigerant, be

sure water is continuously circulating through the cooler to

prevent freezing. Damage caused by freezing is considered

abuse and may void the Sterling warranty.

6. Check the cooler leaving chilled water temperature to see

that it remains well above 32 F (0° C), or the brine freez-

ing point if the unit is a medium temperature brine unit.

7. Recheck compressor oil level (see Check Oil Charge

section).

Check Refrigerant Charge — All 30RA units are

shipped with a complete operating charge of R-22 and should

be under sufficient pressure to conduct a leak test after installa-

tion. If there is no system pressure, admit nitrogen until a pres-

sure is observed and then proceed to test for leaks. After leaks

are repaired, the system must be dehydrated.

Operating Limitations

TEMPERATURES (See Table 41 for 30RA Standard Tem-

perature Limits)

All refrigerant charging should be done through the ¼-in.

Schraeder connection on the liquid line. Do NOT add refriger-

ant charge through the low-pressure side of the system. If com-

plete charging is required, weigh in the appropriate charge for

the circuit as shown on the unit nameplate. If partial charging is

required, operate circuit at full load and use an accurate tem-

perature sensor on the liquid line as it enters the TXV. Use the

Temperatures mode on the Scrolling Marquee display to show

the circuit saturated condensing temperature (SCT.A or

SCT.B). Charging is most accurate at saturated discharge tem-

peratures of 120 to 125 F (49 to 52 C). Block condenser airflow

as required to reach this temperature range. Add refrigerant un-

til the system subcooling (SCT.A or SCT.B minus liquid line

temperature entering TXV) is approximately 15 to 17 F (–9.4

to –8.3 C). Refrigerant VAPOR only may be added to a circuit

Do not operate with cooler leaving chiller water (fluid)

temperature (LCWT) below 40 F (4.4 C) for the standard

units, or below 15 F (–9.4 C) for units factory built for

medium temperature brine.

High Cooler Leaving Chilled Water (Fluid) Temperatures

(LCWT) — During start-up with cooler LCWT above approx-

imately 60 F (16 C), the unit expansion valve will limit suction

pressure to approximately 90 psig (620 kPa) to avoid overload-

ing the compressor.

Low Cooler LCWT — For standard units, the LCWT must be

no lower than 40 F (4.4 C). If the unit is the factory-installed

optional medium temperature brine unit, the cooler LCWT can

go down to 15 F (–9.4 C).

through the /₄-in. suction Schraeder connection on the com-

pressor. This connection is located in line and to the left of the

compressor junction box for the SM110 compressors and to the

Download from Www.Somanuals.com. All Manuals Search And Download.

Table 41 — Temperature Limits for

2. Determine maximum deviation from average voltage:

Standard 30RA Units

(AB) 243 – 239 = 4 v

(BC) 239 – 236 = 3 v

(AC) 239 – 238 = 1 v

UNIT SIZE 30RA

010-030

032-055

Temperature

Maximum deviation is 4 v.

Maximum Ambient

Temperature

Minimum Ambient

Temperature

120

3. Determine percent voltage imbalance:

% Voltage Imbalance = 100 x

239

Maximum Cooler EWT*

Maximum Cooler LWT

Minimum Cooler LWT†

4.4

= 1.7%

LEGEND

Entering Fluid (Water) Temperature

Leaving Fluid (Water) Temperature

This voltage imbalance is satisfactory as it is below the

maximum allowable of 2%.

EWT

LWT

—

IMPORTANT: If the supply voltage phase imbalance is

more than 2%, contact your local electric utility company

immediately. Do not operate unit until imbalance condition

is corrected.

*For sustained operation, EWT should not exceed 85 F (29.4 C).

†Unit requires modification below this temperature.

LOW-AMBIENT OPERATION — If operating temperatures

below 45 F (7 C) for sizes 010-030 or below 32 F (0° C) for

sizes 032-055 are expected, accessory Motormaster® V con-

trol must be installed. Refer to separate installation instructions

for operation using this accessory. Contact your Sterling repre-

sentative for details.

Control Circuit Power — Power for the control circuit is

supplied from the main incoming power through a factory-

installed control power transformer (TRAN1) for all models.

Field wiring connections are made to either terminal block

TB5 or TB6.

OPERATION SEQUENCE

Brine duty application (below 40 F [4.4 C] LCWT) for

chiller normally requires factory modification. Contact

your Sterling representative for applicable LCWT range for

standard water-cooled chiller in a specific application.

During unit off cycle, the control monitors the outdoor air

temperature. If the ambient temperature drops below 40 F

(4.4 C), cooler and hydronic system heaters (if either are facto-

ry installed) are energized. If power is maintained to the chiller

and the EMERGENCY ON/OFF switch is left in the OFF po-

sition, these heaters are also energized.

The unit is started by putting the ENABLE/OFF/REMOTE

CONTACT switch in the ENABLE or REMOTE CONTACT

position. When the unit receives a call for cooling (either from

the internal control or SCN network command or remote con-

tact closure), the unit stages up in capacity to maintain the leav-

ing fluid set point. The first compressor starts 1¹/₂to 3 minutes

after the call for cooling.

VOLTAGE — ALL UNITS

Main Power Supply — Minimum and maximum acceptable

supply voltages are listed in the Installation Instructions.

Unbalanced 3-Phase Supply Voltage — Never operate a motor

where a phase imbalance between phases is greater than 2%.

To determine percent voltage imbalance:

max voltage deviation

from avg voltage

average voltage

% Voltage Imbalance = 100 x

The lead circuit can be specifically designated on all models

or selected based on compressor run hours and starts depend-

ing on field configuration. The unit control will override this

selection under certain starting conditions to properly maintain

oil return to the compressors. In general, on dual compressor

circuits, the control will most often start the A1 or B1 compres-

sor first, especially after long off periods. The MBB controls

fan stages to maintain the head pressure set point and will auto-

matically adjust unit capacity as required to keep compressors

from operating outside of the specified envelope. There are no

pumpout or pumpdown sequences on these chillers.

For all units, if temperature reset is being used, the unit con-

trols to a higher leaving-fluid temperature as the building load

reduces. If demand limit is used, the unit may temporarily be

unable to maintain the desired leaving-fluid temperature be-

cause of imposed power limitations. Loading sequence for

compressors is shown in Tables 6 and 7.

The maximum voltage deviation is the largest difference

between a voltage measurement across 2 legs and the average

across all 3 legs.

Example: Supply voltage is 240-3-60.

AB = 243 v

BC = 236 v

AC = 238 v

1. Determine average voltage:

243 + 236 + 238

Averagevoltage =

717

= 239

Download from Www.Somanuals.com. All Manuals Search And Download.

APPENDIX A

SCN Tables

A_UNIT (General Unit Parameters)

DESCRIPTION

Control Mode

VALUE

UNITS

POINT NAME

STAT

FORCEABLE

0 = Test

1 = Local Off

2 = SCN Off

3 = Clock Off

4 = Emergency Stop

5 = Local On

6 = SCN On

7 = Clock On

8 = Heat Enabled

9 = Pump Delay

Occupied

SCN Chiller

Low Sound Active

Alarm State

Active Demand Limit

Override Modes in Effect

Percent Total Capacity

Requested Stage

Active Set Point

No/Yes

Start/Stop

No/Yes

Normal/Alert/Alarm

0 to 100

No/Yes

0 to 100

0 to 99

–20 to 70

snnn.n

OCC

CHIL_S_S

LSACTIVE

ALM

DEM_LIM

MODE

CAP_T

STAGE

CTRL_PNT

EWT

°F

Enable

minutes

Control Point

Entering Fluid Temp

Leaving Fluid Temp

Emergency Stop

Minutes Left for Start

PUMPS

snnn.n

Enable/Emstop

00:00 to 15:00

LWT

EMSTOP

MIN_LEFT

Cooler Pump Relay 1

Cooler Pump Relay 2

Cooler Pump 1 Interlock

Cooler Pump 2 Interlock

Cooler Flow Switch

Rotate Cooler Pumps Now

Off/On

Open/Close

No/Yes

COOLPMP1

COOLPMP2

PMP1_FBK

PMP2_FBK

COOLFLOW

ROT_PUMP

Heat/Cool Select

Heat/Cool

HC_SEL

CIRCADIO (Circuit A Discrete Inputs/Outputs)

DESCRIPTION

CIRC. A DISCRETE OUTPUTS

Compressor A1 Relay

Compressor A2 Relay

Minimum Load Valve Relay

VALUE

UNITS

POINT NAME

FORCEABLE

On/Off

K_A1_RLY

K_A2_RLY

MLV_RLY

CIRC. A DISCRETE INPUTS

Compressor A1 Feedback

Compressor A2 Feedback

On/Off

K_A1_FBK

K_A2_FBK

CIRCA_AN (Circuit A Analog Parameters)

DESCRIPTION

CIRCUIT A ANALOG VALUES

Percent Total Capacity

Percent Available Cap.

Discharge Pressure

VALUE

UNITS

POINT NAME

FORCEABLE

0-100

nnn.n

snnn.n

PSIG

°F

∆F

CAPA_T

CAPA_A

DP_A

SP_A

HSP_A

TMP_SCTA

TMP_SSTA

TMP_RGTA

SH_A

Suction Pressure

Calculated HP Setpoint A

Saturated Condensing Tmp

Saturated Suction Temp

Compr Return Gas Temp

Suction Superheat Temp

Download from Www.Somanuals.com. All Manuals Search And Download.

CIRCBDIO (Circuit B Discrete Inputs/Outputs)

DESCRIPTION

CIRC. B DISCRETE OUTPUTS

Compressor B1 Relay

Compressor B2 Relay

Minimum Load Valve Relay

VALUE

UNITS

POINT NAME

FORCEABLE

On/Off

K_B1_RLY

K_B2_RLY

MLV_RLY

CIRC. B DISCRETE INPUTS

Compressor B1 Feedback

Compressor B2 Feedback

On/Off

K_B1_FBK

K_B2_FBK

CIRCB_AN (Circuit B Analog Parameters)

DESCRIPTION

CIRCUIT B ANALOG VALUES

Percent Total Capacity

Percent Available Cap.

Discharge Pressure

VALUE

UNITS

POINT NAME

FORCEABLE

0-100

nnn.n

snnn.n

PSIG

°F

∆F

CAPB_T

CAPB_A

DP_B

SP_B

HSP_B

TMP_SCTB

TMP_SSTB

TMP_RGTB

SH_B

Suction Pressure

Calculated HP Setpoint B

Saturated Condensing Tmp

Saturated Suction Temp

Compr Return Gas Temp

Suction Superheat Temp

OPTIONS (Unit Parameters)

DESCRIPTION

FANS

VALUE

UNITS

POINT NAME

FORCEABLE

Fan 1 Relay

Fan 2 Relay

Cooler/Pump Heater

Off/On

FAN_1

FAN_2

COOL_HTR

UNIT ANALOG VALUES

Cooler Entering Fluid

Cooler Leaving Fluid

Lead/Lag Leaving Fluid

snnn.n

°F

COOL_EWT

COOL_LWT

DUAL_LWT

TEMPERATURE RESET

4-20 mA Reset Signal

Outside Air Temperature

Space Temperature

nn.n

snnn.n

°F

RST_MA

OAT

SPT

DEMAND LIMIT

4-20 mA Demand Signal

Demand Limit Switch 1

Demand Limit Switch 2

SCN Loadshed Signal

nn.n

Off/On

0 = Normal

1 = Redline

2 = Loadshed

LMT_MA

DMD_SW1

DMD_SW2

DL_STAT

MISCELLANEOUS

Heat Request

Dual Setpoint Switch

Cooler LWT Setpoint

Ice Done

Off/On

snnn.n

Off/On

HEAT_REQ

DUAL_IN

LWT_SP

°F

ICE_DONE

Download from Www.Somanuals.com. All Manuals Search And Download.

ALARMDEF (Alarm Definition Table)

DESCRIPTION

Alarm Routing Control

Equipment Priority

Comm Failure Retry Time

Re-alarm Time

VALUE

00000000

0 to 7

1 to 240

1 to 255

XXXXXXXX

DEFAULT

00000000

CHILLER

UNITS

POINT NAME

ALRM_CNT

EQP_TYPE

RETRY_TM

RE-ALARM

ALRM_NAM

min

Alarm System Name

BRODEFS (Broadcast POC Definition Table)

DESCRIPTION

SCN Time/Date Broadcast

SCN OAT Broadcast

Global Schedule Broadcast

SCN Broadcast Ack’er

Daylight Savings Start:

Month

Week

Day

Minutes to Add

Daylight Savings Stop

Month

VALUE

Yes/No

DEFAULT

UNITS

POINT NAME

SCNBC

OATBC

GSBC

SCNBCACK

1 to 12

1 to 5

1 to 7

STARTM

STARTW

STARTD

MINADD

0 to 99

min

1 to 12

1 to 5

1 to 7

STOPM

STOPW

STOPD

MINSUB

Week

Day

Minutes to Subtract

0 to 99

DISPLAY (Marquee Display SETUP)

DESCRIPTION

Service Password

Password Enable

Metric Display

VALUE

nnnn

Enable/Disable

Off/On

DEFAULT

1111

Enable

Off

UNITS

POINT NAME

PASSWORD

PASS_EBL

DISPUNIT

Language Selection

0 = ENGLISH

LANGUAGE

1 = FRANCAIS

2 = ESPANOL

3 = PORTUGUES

DUALCHIL (Dual Chiller Configuration Settings)

DESCRIPTION

LEAD/LAG

VALUE

DEFAULT

UNITS

POINT NAME

Lead/Lag Chiller Enable

Master/Slave Select

Slave Address

Lead/Lag Balance Select

Lead/Lag Balance Delta

Lag Start Delay

Enable/Dsable

Master/Slave

0 to 239

0 = None

40 to 400

0 to 30

Dsable

Master

168

Yes

LL_ENA

MS_SEL

SLV_ADDR

LL_BAL

LL_BAL_D

LL_DELAY

PARALLEL

hours

minutes

Parallel Configuration

Yes

Download from Www.Somanuals.com. All Manuals Search And Download.

OPTIONS1 (Options 1 Configuration)

DESCRIPTION

Cooler Fluid

VALUE

1 = Water

2 = Med. Brine

DEFAULT

UNITS

POINT NAME

FLUIDTYP

Minimum Load Vlv Select

Return Gas Sensor Enable

Motormaster Select

Cooler Pump Control

Cooler Pump 1 Enable

Cooler Pump 2 Enable

Cooler Pmp Periodic Strt

Cooler Pump Select

No/Yes

Dsable/Enable

No/Yes

Off/On

No/Yes

Dsable/Enable

No/Yes

0 = Automatic

1 = Pump 1

2 = Pump 2

Dsable

Off

Dsable

MLV_FLG

RGT_ENA

MTR_TYPE

CPC

PMP1_ENA

PMP2_ENA

PUMP_PST

PMP_SLCT

Cooler Pump Shutdown Dly

Pump Changeover Hours

EMM Module Installed

0 to 10

10 to 2000

No/Yes

500

minutes

hours

PUMP_DLY

PMP_DLTA

EMM_BRD

OPTIONS2 (Options 2 Configuration)

DESCRIPTION

VALUE

DEFAULT

UNITS

POINT NAME

Control Method

0 = Switch

CONTROL

2 = Occupancy

3 = SCN

Loading Sequence Select

Lead/Lag Circuit Select

1 = Equal Loading

2 = Staged Loading

0 = Automatic

1 = Circuit A Leads

2 = Circuit B Leads

SEQ_TYP

LEAD_TYP

Cooling Setpoint Select

0 = Single

CLSP_TYP

1 = Dual, remote switch controlled

2 = Dual SCN occupancy

3 = 4-20 mA input

Ramp Load Select

Heat Cool Select

High LCW Alert Limit

Minutes off time

Enable/Dsable

Cool/Heat

2 to 60

Enable

Cool

60.0

RAMP_EBL

HEATCOOL

LCW_LMT

DELAY

∆F

min

0 to 15

Deadband Multiplier

Ice Mode Enable

Close Control Select

Low Sound Mode Select

1.0 to 4.0

Enable/Dsable

2.0

Z_GAIN

Dsable

ICE_CNFG

CLS_CTRL

LS_MODE

0 = Disabled

1 = Fan only

2 = Capacity/Fans

Low Sound Start Time

Low Sound End Time

Low Sound Capacity Limit

Enable Short Loop Gain

00:00 to 23:59

0 to 100

00:00

100

LS_START

LS_END

LS_LIMIT

SAGENABL

Enable/Dsable

Enable

Download from Www.Somanuals.com. All Manuals Search And Download.

RESETCON (Temperature Reset and Demand Limit)

DESCRIPTION

COOLING RESET

VALUE

DEFAULT

UNITS

POINT NAME

Cooling Reset Type

0 = No Reset

CRST_TYP

1 = 4-20 mA input

2 = External temp – OAT

3 = Return Fluid

4 = External temp - SPT

4-20 MA RESET

4-20 – Degrees Reset

–30 to 30

0.0

∆F

420_DEG

REMOTE RESET

Remote – No Reset Temp

Remote – Full Reset Temp

Remote – Degrees Reset

0 to 125

–30 to 30

125.0

0.0

°F

∆F

REM_NO

REM_FULL

REM_DEG

RETURN TEMPERATURE RESET

Return – No Reset Temp

Return – Full Reset Temp

Return – Degrees Reset

0 to 125

–30 to 30

10.0

0.0

∆F

RTN_NO

RTN_FULL

RTN_DEG

DEMAND LIMIT

Demand Limit Select

0 = None

DMD_CTRL

1 = External switch input

2 = 4-20 mA input

3 = Loadshed

Demand Limit at 20 mA

Loadshed Group Number

Loadshed Demand Delta

Maximum Loadshed Time

Demand Limit Switch 1

Demand Limit Switch 2

0 to 100

0 to 99

0 to 60

0 to 120

0 to 100

100

DMT20MA

SHED_NUM

SHED_DEL

SHED_TIM

DLSWSP1

DLSWSP2

minutes

SCHEDOVR (Timed Override Setup)

DESCRIPTION

Schedule Number

Override Time Limit

Timed Override Hours

Timed Override

VALUE

0 to 99

0 to 4

No/Yes

DEFAULT

UNITS

POINT NAME

SCHEDNUM

OTL

OVR_EXT

TIMEOVER

hours

SETPOINT

DESCRIPTION

COOLING

VALUE

DEFAULT

UNITS

POINT NAME

Cooling Setpoint 1

Cooling Setpoint 2

ICE Setpoint

–20 to 70

–20 to 32

44.0

32.0

°F

CSP1

CSP2

CSP3

RAMP LOADING

Cooling Ramp Loading

0.2 to 2.0

1.0

CRAMP

Brine Freeze Point

–20 to 34

34.0

°F

BRN_FRZ

Download from Www.Somanuals.com. All Manuals Search And Download.

UNIT

DESCRIPTION

Compressor A1 Size

VALUE

8 to 15

DEFAULT

UNITS

POINT NAME

SIZE_A1

60 Hz: 010-10; 015-15;

018-9; 022-9; 025-13;

030-15; 035-9; 040-13;

045-10; 050-13; 055-15

50 Hz: 010-11; 015-7;

018-9; 022-11; 025-13;

032-8; 035-13; 042-11;

045-13

Compressor A2 Size

0 to 15

SIZE_A2

60 Hz: 018-9; 022-13;

025-13; 030-15; 035-13;

040-13;

045-13; 050-13; 055-15

50 Hz: 015-7; 018-9; 022-

11; 025-13; 032-11; 035-

13; 042-11; 045-13

Compressor B1 Size

Compressor B2 Size

0 to 15

SIZE_B1

SIZE_B2

60 Hz: 035-15; 040-15;

045-10; 050-13; 055-15

50 Hz: 032-13; 035-13;

042-11; 045-13

60 Hz: 045-13; 050-13;

055-15

50 Hz: 042-11; 045-13

Suction Superheat Setpt

Refrigerant

Fan Staging Select

10 to 40

1 = R22

1 = 1 Fan

2 = 2 Fans

3 = 3 Fans

4 = 4 Fans

SH_SP

REFRIG_T

FAN_TYPE

1 = One Fan (010-018)

2 = Two Fans (022-030)

3 = Three Fans (032-040)

4 = Four Fans (042-055)

MAINTENANCE

ALARMS: Maintenance Display

DESCRIPTION

VALUE

POINT NAME

ALARM01C

ALARM02C

ALARM03C

ALARM04C

ALARM05C

ALARM06C

ALARM07C

ALARM08C

ALARM09C

ALARM10C

ALARM11C

ALARM12C

ALARM13C

ALARM14C

ALARM15C

ALARM16C

ALARM17C

ALARM18C

ALARM19C

ALARM20C

ALARM21C

ALARM22C

ALARM23C

ALARM24C

ALARM25C

Active Alarm #1

Active Alarm #2

Active Alarm #3

Active Alarm #4

Active Alarm #5

Active Alarm #6

Active Alarm #7

Active Alarm #8

Active Alarm #9

Active Alarm #10

Active Alarm #11

Active Alarm #12

Active Alarm #13

Active Alarm #14

Active Alarm #15

Active Alarm #16

Active Alarm #17

Active Alarm #18

Active Alarm #19

Active Alarm #20

Active Alarm #21

Active Alarm #22

Active Alarm #23

Active Alarm #24

Active Alarm #25

Axxx or Txxx

Download from Www.Somanuals.com. All Manuals Search And Download.

CURRMODS: Maintenance Display

DESCRIPTION

FSM controlling Chiller

WSM controlling Chiller

Master/Slave control

Ramp Load Limited

Timed Override in effect

Low Cooler Suction TempA

Low Cooler Suction TempB

Slow Change Override

Minimum OFF time active

Dual Setpoint

VALUE

POINT NAME

MODE_1

MODE_2

On/Off

MODE_3

MODE_5

MODE_6

MODE_7

MODE_8

MODE_9

MODE_10

MODE_13

MODE_14

MODE_15

MODE_16

MODE_17

MODE_18

MODE_19

MODE_20

MODE_21

MODE_22

MODE_23

MODE_24

MODE_25

MODE_26

Temperature Reset

Demand/Sound Limited

Cooler Freeze Protection

Low Temperature Cooling

High Temperature Cooling

Making ICE

Storing ICE

High SCT Circuit A

High SCT Circuit B

Minimum Comp. On Time

Pump Off Delay Time

Low Sound Mode

Short Loop Override

DUALCHIL: Maintenance Display

DESCRIPTION

Dual Chiller Link Good?

Master Chiller Role

VALUE

Yes/No

UNITS

POINT NAME

DC_LINK

Stand Alone,

Lead Chiller,

Lag Chiller

Stand Alone,

Lead Chiller,

Lag Chiller

MC_ROLE

SC_ROLE

Slave Chiller Role

Lead Chiller Ctrl Point

Lag Chiller Ctrl Point

Control Point

snnn.n

0-100

°F

LEAD_CP

LAG_CP

CTRL_PNT

COOLEWTS

COOLLWTS

COOL_EWT

COOL_LWT

DUAL_LWT

CAP_A

CAP_A_S

LAGDELAY

SMZ

SMZSLAVE

LEADSMZC

LAG_SMZC

LAG_OFF

DCLDCAPL

DCLGCAPL

Cool EnteringFluid-Slave

Cool Leaving Fluid-Slave

Cooler Entering Fluid

Cooler Leaving Fluid

Lead/Lag Leaving Fluid

Percent Avail.Capacity

Percent Avail.Cap.Slave

Lag Start Delay Time

Load/Unload Factor

Load/Unload Factor-Slave

Lead SMZ Clear Commanded

Lag- SMZ Clear Commanded

Lag Commanded Off?

Dual Chill Lead CapLimit

Dual Chill Lag CapLimit

0-100

hh:mm

snnn.n

Yes/No

0-100

Download from Www.Somanuals.com. All Manuals Search And Download.

LEARNFNS: Maintenance Display

DESCRIPTION

Fan 1 Delta SCT point 1

Fan 1 Delta SCT point 2

Fan 1 Delta SCT point 3

Fan 1 Delta SCT point 4

Fan 1 Delta SCT point 5

Fan 2 Delta SCT point 1

Fan 2 Delta SCT point 2

Fan 2 Delta SCT point 3

Fan 2 Delta SCT point 4

Fan 2 Delta SCT point 5

SCT Delta for Comp A1

SCT Delta for Comp A2

SCT Delta for Comp B1

SCT Delta for Comp B2

SAGP for Compressor A1

SAGM for Compressor A1

SAGP for Compressor A2

SAGM for Compressor A2

SAGP for Compressor B1

SAGM for Compressor B1

SAGP for Compressor B2

SAGM for Compressor B2

VALUE

snnn.n

nn.n

UNITS

°F

POINT NAME

F1DLTA1

F1DLTA2

F1DLTA3

F1DLTA4

F1DLTA5

F2DLTA1

F2DLTA2

F2DLTA3

F2DLTA4

F2DLTA5

A1SCTDT

A2SCTDT

B1SCTDT

B2SCTDT

SAGA1P

SAGA1M

SAGA2P

SAGA2M

SAGB1P

SAGB1M

SAGB2P

SAGB2M

LOADFACT: Maintenance Display

DESCRIPTION

CAPACITY CONTROL

Load/Unload Factor

Control Point

Entering Fluid Temp

Leaving Fluid Temp

VALUE

UNITS

POINT NAME

snnn.n

SMZ

CTRL_PNT

EWT

°F

LWT

Ramp Load Limited

On/Off

MODE_5

MODE_9

MODE_16

MODE_17

MODE_18

MODE_23

Slow Change Override

Cooler Freeze Protection

Low Temperature Cooling

High Temperature Cooling

Minimum Comp. On Time

OCCUPANCY SUPERVISORY (OCCDEFM): Maintenance Display

DESCRIPTION

Current Mode (1=Occup.)

Current Occup. Period #

Timed-Override in Effect

Time-Override Duration

Current Occupied Time

Current Unoccupied Time

Next Occupied Day

VALUE

0/1

0-8

Yes/No

0-4 hours

hh:mm

POINT NAME

MODE

PER-NO

OVERLAST

OVR_HRS

STRTTIME

ENDTIME

NXTOCDAY

NXTOCTIM

NXTUNDAY

NXTUNTIM

PRVUNDAY

PRVUNTIM

Next Occupied Time

hh:mm

Next Unoccupied Day

Next Unoccupied Time

Previous Unoccupied Day

Previous Unoccupied Time

Download from Www.Somanuals.com. All Manuals Search And Download.

PM-COIL: Maintenance Display

DESCRIPTION

Coil Cleaning Srvc Inter

Coil Service Countdown

Coil Cleaning Maint.Done

Coil Cleaning Maint.Date

VALUE

nnnnnn

UNITS

hours

POINT NAME

SI_COIL

CL_CDOWN

CL_MAINT

COIL_PM0

COIL_PM1

COIL_PM2

COIL_PM3

COIL_PM4

Yes/No

mm/dd/yy hh:mm

PM-PUMP: Maintenance Display

DESCRIPTION

Pump Service Interval

VALUE

nnnnnn

Yes/No

nnnnnn

Yes/No

UNITS

hours

POINT NAME

SI_PUMPS

P1_CDOWN

P1_MAINT

P2_CDOWN

P2_MAINT

PMP1_PM0

PMP1_PM1

PMP1_PM2

PMP1_PM3

PMP1_PM4

PMP2_PM0

PMP2_PM1

PMP2_PM2

PMP2_PM3

PMP2_PM4

Pump 1 Service Countdown

Pump 1 Maintenance Done

Pump 2 Service Countdown

Pump 2 Maintenance Done

Pump 1 Maintenance Date

Pump 2 Maintenance Date

hours

mm/dd/yy hh:mm

PM-STRN: Maintenance Display

DESCRIPTION

Strainer Srvc Interval

Strainer Srvc Countdown

Strainer Maint. Done

Strainer Maint. Date

VALUE

nnnnnn

UNITS

hours

POINT NAME

SI_STRNR

ST_CDOWN

ST_MAINT

STRN_PM0

STRN_PM1

STRN_PM2

STRN_PM3

STRN_PM4

Yes/No

mm/dd/yy hh:mm

Download from Www.Somanuals.com. All Manuals Search And Download.

RUNTEST: Maintenance Display

DESCRIPTION

Percent Total Capacity

Percent Available Cap.

Discharge Pressure

VALUE

nnn

UNITS

psig

°F

POINT NAME

CAPA_T

CAPA_A

DP_A

SP_A

HSP_A

TMP_SCTA

TMP_SSTA

TMP_RGTA

SH_A

K_A1_RLY

K_A2_RLY

MLV_RLY

K_A1_FBK

K_A2_FBK

CAPB_T

CAPB_A

DP_B

nnn.n

On/Off

nnn

Suction Pressure

Calculated HP Setpoint A

Saturated Condensing Tmp

Saturated Suction Temp

Compr Return Gas Temp

Suction Superheat Temp

Compressor A1 Relay

Compressor A2 Relay

Minimum Load Valve Relay

Compressor A1 Feedback

Compressor A2 Feedback

Percent Total Capacity

Percent Available Cap.

Discharge Pressure

°F

psig

°F

nnn

nnn.n

On/Off

Suction Pressure

SP_B

HSP_B

Calculated HP Setpoint B

Saturated Condensing Tmp

Saturated Suction Temp

Compr Return Gas Temp

Suction Superheat Temp

Compressor B1 Relay

Compressor B2 Relay

Minimum Load Valve Relay

TMP_SCTB

TMP_SSTB

TMP_RGTB

SH_B

K_B1_RLY

K_B2_RLY

MLV_RLY

Compressor B1 Feedback

Compressor B2 Feedback

Fan 1 Relay

On/Off

K_B1_FBK

K_B2_FBK

FAN_1

Fan 2 Relay

FAN_2

Outside Air Temperature

Space Temperature

Cooler Pump Relay 1

Cooler Pump Relay 2

Cooler Pump 1 Interlock

Cooler Pump 2 Interlock

Cooler Entering Fluid

Cooler Leaving Fluid

Compressor A1 Size

Compressor A2 Size

Compressor B1 Size

Compressor B2 Size

Cooler Flow Switch

nnn.n

°F

OAT

SPT

On/Off

Open/Closed

nnn.n

COOLPMP1

COOLPMP2

PMP1_FBK

PMP2_FBK

COOL_EWT

COOL_LWT

SIZE_A1

SIZE_A2

SIZE_B1

SIZE_B2

COOLFLOW

°F

tons

nnn.n

nnn

On/Off

Download from Www.Somanuals.com. All Manuals Search And Download.

STRTHOUR: Maintenance Display

DESCRIPTION

Machine Operating Hours

Machine Starts

VALUE

nnnnnn

UNITS

hours

POINT NAME

HR_MACH

CY_MACH

Circuit A Run Hours

nnnnnn

hours

HR_CIRA

HR_A1

HR_A2

HR_CIRB

HR_B1

HR_B2

Compressor A1 Run Hours

Compressor A2 Run Hours

Circuit B Run Hours

Compressor B1 Run Hours

Compressor B2 Run Hours

Circuit A Starts

nnnnnn

CY_CIRA

CY_A1

CY_A2

CY_CIRB

CY_B1

CY_B2

Compressor A1 Starts

Compressor A2 Starts

Circuit B Starts

Compressor B1 Starts

Compressor B2 Starts

PUMP HOURS

Pump 1 Run Hours

Pump 2 Run Hours

nnnnnn

hours

HR_PUMP1

HR_PUMP2

TESTMODE: Maintenance Display

DESCRIPTION

Service Test Mode

Compressor A1 Relay

Compressor A2 Relay

Compressor B1 Relay

Compressor B2 Relay

Fan 1 Relay

VALUE

On/Off

UNITS

POINT NAME

NET_CTRL

S_A1_RLY

S_A2_RLY

S_B1_RLY

S_B2_RLY

S_FAN_1

S_FAN_2

S_CLPMP1

S_CLPMP2

S_MLV

Fan 2 Relay

Cooler Pump Relay 1

Cooler Pump Relay 2

Minimum Load Valve Relay

Remote Alarm Relay

S_ALM

VERSIONS: Maintenance Display

DESCRIPTION

MBB

EMM

MARQUEE

NAVIGATOR

VERSION

VALUE

nn-nn

CESR131279-

CESR131174-

CESR131171-

CESR130227-

Download from Www.Somanuals.com. All Manuals Search And Download.

WSMDEFME: Maintenance Display

DESCRIPTION

WSM Active?

VALUE

Yes

UNITS

POINT NAME

WSMSTAT

Chilled water temp

Equipment status

snn.n

°F

CHWTEMP

CHLRST

Commanded state

Enable

Dsable

None

CHLRENA

CHW setpoint reset value

Current CHW setpoint

nn.n

snn.n

°F

CHWRVAL

CHWSTPT

Download from Www.Somanuals.com. All Manuals Search And Download.

APPENDIX B

FACTORY SETTINGS FOR COMPRESSOR, FAN, PUMP,

AND MANUAL STARTERS

MANUAL STARTER

(CWP1, CWP2) SETTINGS

FOR PUMP OPTIONS

OVERLOAD

RELAY (CA1)

SETTING FOR

OVERLOAD

RELAY (CA2)

SETTING FOR

MANUAL

STARTER

MANUAL

STARTER

MANUAL

STARTER

SETTING FOR

CHC (Heaters)

UNIT

SIZE

30RA

VOLTAGE

V-PH-Hz

VOLTAGE

SERIES

SETTING FOR

(Model Number Position 9)

COMPRESSOR COMPRESSOR

FANS FC-HS/LS FANS FC-A1/A2

A/F B/G C/H D/J E/K

575-3-60

380-3-60

230-3-60

208/230-3-60

460-3-60

230-3-50

380/415-3-50

575-3-60

380-3-60

230-3-60

208/230-3-60

460-3-60

230-3-50

380/415-3-50

575-3-60

380-3-60

230-3-60

208/230-3-60

460-3-60

230-3-50

380/415-3-50

575-3-60

380-3-60

230-3-60

208/230-3-60

460-3-60

230-3-50

380/415-3-50

575-3-60

380-3-60

230-3-60

208/230-3-60

460-3-60

230-3-50

380/415-3-50

575-3-60

380-3-60

230-3-60

208/230-3-60

460-3-60

-100

-200

-400

-500

-600

-800

-900

-100

-200

-400

-500

-600

-800

-900

-100

-200

-400

-500

-600

-800

-900

-100

-200

-400

-500

-600

-800

-900

-100

-200

-400

-500

-600

-800

-900

-100

-200

-400

-500

-600

15.5

24.2

37.1

41.2

19.2

40.9

23.8

22.7

36.1

52.6

58.4

28.6

31.1

17.2

13.6

31.9

35.4

16.9

33.7

18.7

14.6

22.7

35.3

39.2

17.5

40.9

23.8

19.9

31.7

—

3.6

5.5

9.1

10.1

4.6

7.6

4.6

3.6

5.5

9.1

10.1

4.6

7.6

4.6

3.6

5.5

9.1

10.1

4.6

7.6

4.6

—

1.8

2.5

1.8

2.5

1.8

2.5

1.8

2.5

1.8

2.5

1.8

2.5

1.8

2.5

1.8

2.5

1.8

2.5

1.8

2.5

1.8

2.5

1.8

1.9

2.9

4.8

5.3

2.8

3.4

2.0

1.9

2.9

4.8

5.3

2.8

3.4

2.0

1.9

2.9

4.8

5.3

2.8

3.4

2.0

1.9

2.9

4.8

5.3

2.8

3.4

2.0

1.9

2.9

4.8

5.3

2.8

3.4

2.0

1.9

2.9

4.8

5.3

2.8

2.5

3.7

6.2

7.0

3.1

4.8

2.9

2.5

3.7

6.2

7.0

3.1

4.8

2.9

2.5

3.7

6.2

7.0

3.1

4.8

2.9

2.5

3.7

6.2

7.0

3.1

4.8

2.9

2.5

3.7

6.2

7.0

3.1

4.8

2.9

2.5

3.7

6.2

7.0

3.1

2.5

3.7

6.2

7.0

3.1

4.8

2.9

2.5

3.7

6.2

7.0

3.1

4.8

2.9

2.5

3.7

6.2

7.0

3.1

4.8

2.9

2.5

3.7

6.2

7.0

3.1

4.8

2.9

2.5

3.7

6.2

7.0

3.1

4.8

2.9

2.5

3.7

6.2

7.0

3.1

3.6

5.4

8.9

9.8

4.4

6.1

3.7

3.6

5.4

8.9

9.8

4.4

6.1

3.7

3.6

5.4

8.9

9.8

4.4

6.1

3.7

3.6

5.4

8.9

9.8

4.4

6.1

3.7

3.6

5.4

8.9

9.8

4.4

6.1

3.7

3.6

5.4

8.9

9.8

4.4

—

010

015

018

022

—

31.1

17.2

13.6

31.9

35.4

16.9

33.7

18.7

19.9

31.7

—

2.3

3.5

5.8

7.0

2.9

4.6

3.7

2.3

3.5

5.8

7.0

2.9

4.6

3.7

2.3

3.5

5.8

7.0

2.9

24.2

40.9

23.8

19.9

31.7

025

030

24.2

49.9

22.7

36.1

52.6

58.4

28.6

24.2

49.9

22.7

36.1

52.6

58.4

28.6

—

Download from Www.Somanuals.com. All Manuals Search And Download.

FACTORY SETTINGS FOR COMPRESSOR, FAN, PUMP,

AND MANUAL STARTERS (cont)

MANUAL STARTER

SETTINGS FOR

PUMP OPTIONS

(Model Number

Position 9)

OVERLOAD

MANUAL MANUAL

STARTER STARTER

SETTING SETTING

MANUAL

STARTER

FOR FANS

FC-HS/LS

UNIT

SIZE

30RA

RELAY (CA1) RELAY (CA2) RELAY (CB1) RELAY (CB2)

SETTING FOR SETTING FOR SETTING FOR SETTING FOR

COMPRESSOR COMPRESSOR COMPRESSOR COMPRESSOR

VOLTAGE

V-PH-Hz

VOLTAGE

SERIES

FOR

FOR CHC

FC-A1/A2 (Heaters)

A/F B/G C/H D/J E/K

230-3-50

380/415-3-50

575-3-60

380-3-60

230-3-60

208/230-3-60

460-3-60

230-3-50

380/415-3-50

575-3-60

380-3-60

230-3-60

208/230-3-60

460-3-60

230-3-50

380/415-3-50

575-3-60

380-3-60

230-3-60

208/230-3-60

460-3-60

230-3-50

380/415-3-50

575-3-60

380-3-60

230-3-60

208/230-3-60

460-3-60

575-3-60

380-3-60

230-3-60

208/230-3-60

460-3-60

-800

-900

-100

-200

-400

-500

-600

-800

-900

-100

-200

-400

-500

-600

-800

-900

-100

-200

-400

-500

-600

-800

-900

-100

-200

-400

-500

-600

-100

-200

-400

-500

-600

31.4

17.4

14.6

22.7

35.3

39.2

17.5

49.9

40.9

23.8

19.9

31.7

49.9

—

7.6

4.6

3.6

5.5

9.1

10.1

4.6

7.6

4.6

3.6

5.5

9.1

10.1

4.6

—

4.6

3.7

2.3

3.5

5.8

7.0

2.9

4.6

3.7

2.3

3.5

5.8

7.0

2.9

4.6

3.7

2.3

3.5

5.8

7.0

2.9

4.6

3.7

2.3

3.5

5.8

7.0

2.9

2.3

3.5

5.8

7.0

2.9

2.5

1.8

2.5

1.8

2.5

1.8

2.5

1.8

2.5

1.8

2.5

1.8

2.5

1.8

2.5

1.8

2.5

1.8

—

4.8

2.9

2.5

3.7

6.2

7.0

3.1

4.8

2.9

2.5

3.7

6.2

7.0

3.1

4.8

2.9

2.5

3.7

6.2

7.0

3.1

4.8

2.9

2.5

3.7

6.2

7.0

3.1

2.5

3.7

6.2

7.0

3.1

—

6.1 10.4

3.7 6.4

3.6 6.0

5.4 9.1

8.9 15.1

9.8 16.7

4.4 7.6

6.1 10.4

3.7 6.4

3.6 6.0

5.4 9.1

8.9 15.1

9.8 16.7

4.4 7.6

6.1 10.4

3.7 6.4

3.6 6.0

5.4 9.1

8.9 15.1

9.8 16.7

4.4 7.6

6.1 10.4

3.7 6.4

3.6 6.0

5.4 9.1

8.9 15.1

9.8 16.7

4.4 7.6

3.6 6.0

5.4 9.1

8.9 15.1

9.8 16.7

4.4 7.6

032

035

22.7

36.1

52.6

58.4

28.6

49.9

22.7

36.1

52.6

58.4

28.6

40.9

23.8

15.5

24.2

37.1

41.2

19.2

49.9

24.2

49.9

19.9

31.7

19.9

31.7

040

042

24.2

40.9

23.8

15.5

24.2

37.1

41.2

19.2

49.9

24.2

40.9

23.8

19.9

31.7

—

40.9

23.8

19.9

31.7

045

24.2

49.9

19.9

31.7

24.2

49.9

19.9

31.7

19.9

31.7

19.9

31.7

—

050

055

24.2

22.7

36.1

52.6

58.4

28.6

24.2

22.7

36.1

52.6

58.4

28.6

24.2

22.7

36.1

52.6

58.4

28.6

24.2

22.7

36.1

52.6

58.4

28.6

—

Download from Www.Somanuals.com. All Manuals Search And Download.

APPENDIX C

communication bus. The Sterlco DataLink control is an inter-

Building Interface — The 30RAN chiller can be inter-

faced with multi-vendor control systems through 3 levels of

inter-operability using BAClink, DataPort™, or DataLink™

controls. BAClink controls function as a gateway between a

SCN and a BACnet™ system to facilitate the passing of data

from the SCN to BACnet. The Sterlco DataPort control is an

interface device that allows other HVAC control systems to

“read only” values in system elements connected to a SCN

face device that allows other HVAC control systems to read

and change (“read/write”) values in system elements connected

to a SCN bus. Both DataPort and DataLink controls request

data from a specified SCN system element and translate this

data into ASCII characters off network. Information from the

30RAN chiller control to support interface are listed in the

following tables.

DataPort, DataLink, BAClink Object Definition

SCN TABLE

DESCRIPTION

STATUS

UNITS

POINT

DataPort

DataLink

BAClink

NAME

GENERAL PARAMETERS

Control Mode

(Modes 0-9)

No/Yes

STAT

OCC

Occupied

SCN Chiller

Low Sound Active

Alarm State

Start/Stop

CHIL_S_S

LSACTIVE

ALM

No/Yes

Normal/Alert/Alarm

0 to 100

Active Demand Limit

Override Modes In Effect

Percent Total Capacity

Requested Stage

Active Setpoint

DEM_LIM

MODE

No/Yes

0 to 100

CAP_T

STAGE

0 to 99

–20 to 70 (–28.8 to 21.1)

snnn.n

°F (°C)

Control Point

CTRL_PNT

EWT

Entering Fluid Temp

Leaving Fluid Temp

Emergency Stop

Minutes Left for Start

PUMPS

A_UNIT

snnn.n

Enable/Emstop

00:00 to 15:00

LWT

EMSTOP

MIN_LEFT

Minutes

Cooler Pump Relay 1

Cooler Pump Relay 2

Cooler Pump 1 Interlock

Cooler Pump 2 Interlock

Cooler Flow Switch

Lead Pump

Off/On

COOLPMP1

COOLPMP2

PMP1_FBK

PMP2_FBK

COOLFLOW

LEADPUMP

ROT_PUMP

Open/Close

Off/On

0, 1, 2

No/Yes

Rotate Cooler Pumps Now

Heat/Cool Select

Heat/Cool

HC_SEL

CIRC. A DISCRETE OUTPUTS

Compressor A1 Relay

Off/On

K_A1_RLY

K_A2_RLY

MLV_RLY

Compressor A2 Relay

Minimum Load Valve Relay

CIRCADIO

CIRCA_AN

CIRCBDIO

CIRCB_AN

CIRC. A DISCRETE INPUTS

Compressor A1 Feedback

Compressor A2 Feedback

Off/On

K_A1_FBK

K_A2_FBK

CIRCUIT A ANALOG VALUES

Percent Total Capacity

Percent Available Cap.

Discharge Pressure

0 to 100

nnn.n

snnn.n

CAPA_T

CAPA_A

DP_A

SP_A

HSP_A

TMP_SCTA

TMP_SSTA

TMP_RGTA

SH_A

PSIG (KPA)

°F (°C)

dF (dC)

Suction Pressure

Calculated HP Setpoint A

Saturated Condensing Tmp

Saturated Suction Temp

Compr Return Gas Temp

Suction Superheat Temp

CIRC. B DISCRETE OUTPUTS

Compressor B1 Relay

Off/On

K_B1_RLY

K_B2_RLY

MLV_RLY

Compressor B2 Relay

Minimum Load Valve Relay

CIRC. B DISCRETE INPUTS

Compressor B1 Feedback

Compressor B2 Feedback

Off/On

K_B1_FBK

K_B2_FBK

CIRCUIT B ANALOG VALUES

Percent Total Capacity

Percent Available Cap.

Discharge Pressure

0 to 100

nnn.n

snnn.n

CAPB_T

CAPB_A

DP_B

SP_B

HSP_B

TMP_SCTB

TMP_SSTB

TMP_RGTB

SH_B

PSIG (KPA)

°F (°C)

dF (dC)

Suction Pressure

Calculated HP Setpoint B

Saturated Condensing Tmp

Saturated Suction Temp

Compr Return Gas Temp

Suction Superheat Temp

NOTE: In order to write to any point with DataLink or BAClink con-

trols, the machine must be configured for SCN control. CTRL

Control Method (Configuration mode, sub-mode OPT2) must be set

to 3 = SCN Control.

LEGEND

NA — Not Available

RO — Read Only

RW — Read/Write

Download from Www.Somanuals.com. All Manuals Search And Download.

DataPort, DataLink, BAClink Object Definition (cont)

SCN TABLE

DESCRIPTION

STATUS

UNITS

POINT

DataPort

DataLink

BAClink

NAME

FANS

Fan 1 Relay

Off/On

FAN_1

FAN_2

COOL_HTR

Fan 2 Relay

Cooler/Pump Heater

UNIT ANALOG VALUES

Cooler Entering Fluid

Cooler Leaving Fluid

Lead/Lag Fluid

snnn.n

°F (°C)

COOL_EWT

COOL_LWT

DUAL_LWT

TEMPERTURE RESET

4-20 mA Reset Signal

Outside Air Temperature

Space Temperature

nn.n

snnn.n

°F (°C)

RST_MA

OAT

SPT

OPTIONS

DEMAND LIMIT

4-20 mA Demand Signal

Demand Limit Switch 1

Demand Limit Switch 2

SCN Loadshed Signal

nn.n

LMT_MA

DMD_SW1

DMD_SW2

DL_STAT

Off/On

0, 1, 2

MISCELLANEOUS

Heat Request

Dual Setpoint Switch

Cooler LWT Setpoint

Ice Done

Off/On

snnn.n

Off/On

HEAT_REQ

DUAL_IN

°F (°C)

LWT_SP

ICE_DONE

COOLING

Cooling Setpoint 1

Cooling Setpoint 2

Ice Setpoint

–20 to 70 (–28.8 to 21.1)

–20 to 32 (–28.8 to 0.0)

°F (°C)

CSP1

CSP2

CSP3

SETPOINT

RAMP LOADING

Cooling Ramp Loading

0.2 to 2.0 (0.1 to 1.1)

dF (dC)

CRAMP

Brine Freeze Point

–20 to 34 (–28.8 to 1.1)

°F (°C)

BRN_FRZ

Timed Override Hours

Period 1 DOW (MTWTFSSH)

Occupied Time

Hours

OVR-EXT

DOW1

OCCTOD1

UNOCTOD1

DOW2

OCCTOD2

UNOCTOD2

DOW3

OCCTOD3

UNOCTOD3

DOW4

OCCTOD4

UNOCTOD4

DOW5

OCCTOD5

UNOCTOD5

DOW6

OCCTOD6

UNOCTOD6

DOW7

00000000

00:00

Unoccupied Time

00:00

Period 2 DOW (MTWTFSSH)

Occupied Time

00000000

00:00

Unoccupied Time

00:00

Period 3 DOW (MTWTFSSH)

Occupied Time

00000000

00:00

Unoccupied Time

00:00

Period 4 DOW (MTWTFSSH)

Occupied Time

00000000

00:00

OCCPC01S

Unoccupied Time

00:00

Period 5 DOW (MTWTFSSH)

Occupied Time

00000000

00:00

Unoccupied Time

00:00

Period 6 DOW (MTWTFSSH)

Occupied Time

00000000

00:00

Unoccupied Time

00:00

Period 7 DOW (MTWTFSSH)

Occupied Time

00000000

00:00

OCCTOD7

UNOCTOD7

DOW8

OCCTOD8

UNOCTOD8

Unoccupied Time

00:00

Period 8 DOW (MTWTFSSH)

Occupied Time

00000000

00:00

Unoccupied Time

00:00

LEGEND

NOTE: In order to write to any point with DataLink or BAClink con-

trols, the machine must be configured for SCN control. CTRL

Control Method (Configuration mode, sub-mode OPT2) must be set

to 3 = SCN Control.

NA — Not Available

RO — Read Only

RW — Read/Write

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

PC 903 Catalog No. 533-00047 Printed in U.S.A. Form 30RA-2T Pg 92 1-03 Replaces: 30RA-1T

Book 2

Tab 5c

Download from Www.Somanuals.com. All Manuals Search And Download.

START-UP CHECKLIST FOR 30RA LIQUID CHILLER

(Remove and use for Job File)

I. Project Information

JOB NAME ______________________________________________________________________________

ADDRESS _______________________________________________________________________________

CITY ____________________________________________ STATE _______________ ZIP______________

INSTALLING CONTRACTOR ________________________________________________________________

SALES OFFICE ___________________________________________________________________________

START-UP PERFORMED BY ________________________________________________________________

Design Information

CAPACITY

CEAT

EWT

LWT

FLUID TYPE

FLOW RATE

P.D.

UNIT MODEL ______________________________ SERIAL ________________________________

II. Preliminary Equipment Check

IS THERE ANY PHYSICAL DAMAGE?

YES

DESCRIPTION ____________________________________________________________________________

________________________________________________________________________________________

1. UNIT IS INSTALLED LEVEL AS PER THE INSTALLATION INSTRUCTIONS.

2. POWER SUPPLY AGREES WITH THE UNIT NAMEPLATE.

3. ELECTRICAL POWER WIRING IS INSTALLED PROPERLY.

4. UNIT IS PROPERLY GROUNDED.

YES

5. ELECTRICAL CIRCUIT PROTECTION HAS BEEN SIZED AND INSTALLED PROPERLY.

6. ALL TERMINALS ARE TIGHT.

7. ALL PLUG ASSEMBLIES ARE TIGHT.

8. ALL CABLES AND THERMISTORS HAVE BEEN INSPECTED FOR CROSSED WIRES.

9. ALL THERMISTORS ARE FULLY INSERTED INTO WELLS.

Chilled Water System Check

1. ALL CHILLED WATER VALVES ARE OPEN.

YES

2. ALL PIPING IS CONNECTED PROPERLY.

3. ALL AIR HAS BEEN PURGED FROM THE SYSTEM.

4. CHILLED WATER PUMP IS OPERATING WITH THE CORRECT ROTATION.

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

Book

Tab

PC 903

Catalog No. 533-00047

Printed in U.S.A.

Form 30RA-2T

Pg CL-1

1-03

Replaces: 30RA-1T

Download from Www.Somanuals.com. All Manuals Search And Download.

5. CHILLED WATER PUMP STARTER INTERLOCKED WITH CHILLER.

6. CHILLED WATER FLOW SWITCH IS OPERATIONAL.

YES

7. WATER LOOP VOLUME GREATER THAN MINIMUM REQUIREMENTS. (See Table 40).

8. PROPER LOOP FREEZE PROTECTION PROVIDED TO _____ °F (°C).

ANTIFREEZE TYPE _____________________ CONCENTRATION __________%.

IF OUTDOOR AMBIENT IS BELOW 32 F (0° C) THEN ITEMS 9-11 HAVE TO BE

COMPLETED TO PROVIDE COOLER FREEZE PROTECTION TO –20 F (–29 C). (REFER

TO WINTER SHUTDOWN FOR PROPER COOLER WINTERIZATION PROCEDURE.)

9. OUTDOOR PIPING WRAPPED WITH ELECTRIC HEATER TAPE,

INSULATED AND OPERATIONAL.

YES

10. COOLER HEATERS INSTALLED AND OPERATIONAL.

11. CHILLED WATER PUMP CONTROLLED BY CHILLER.

YES

III. Unit Start-Up

1. COMPRESSOR OIL LEVEL IS CORRECT.

YES

2. VERIFY COMPRESSOR MOUNTING BOLT TORQUE IS 10-14 FT-LB. (13.5-18.9 N-M).

3. LEAK CHECK UNIT. LOCATE, REPAIR AND REPORT ANY REFRIGERANT LEAKS.

4. VOLTAGE IS WITHIN UNIT NAMEPLATE RANGE.

5. CONTROL TRANSFORMER PRIMARY CONNECTION SET FOR PROPER VOLTAGE.

6. CONTROL TRANSFORMER SECONDARY VOLTAGE =

7. CHECK VOLTAGE IMBALANCE:

AVERAGE VOLTAGE =

A-B

A-C

B-C

(A-B + A-C + B-C)/3

MAXIMUM DEVIATION FROM AVERAGE VOLTAGE =

VOLTAGE IMBALANCE = ____________% (MAX. DEVIATION/AVERAGE VOLTAGE) X 100

VOLTAGE IMBALANCE LESS THAN 2%.

(DO NOT START CHILLER IF VOLTAGE IMBALANCE IS GREATER THAN 2%.

CONTACT LOCAL UTILITY FOR ASSISTANCE.)

YES

8. VERIFY COOLER FLOW RATE.

PRESSURE ENTERING COOLER

PRESSURE LEAVING COOLER

COOLER PRESSURE DROP

Psig X 2.31 ft./psi =

________ psig (kPa)

________ ft of water

________ m of water

kPa X 0.334 m/psi

COOLER FLOW RATE

________ gpm (l/s) (See Cooler Pressure

Drop Curves from

Installation, Start-up and

Service Instructions)

Start and Operate Machine. Complete the Following:

1. COMPLETE COMPONENT TEST.

YES

2. CHECK REFRIGERANT AND OIL CHARGE.

3. RECORD COMPRESSOR MOTOR CURRENT.

4. RECORD CONFIGURATION SETTINGS.

5. RECORD OPERATING TEMPERATURES AND PRESSURES.

6. PROVIDE OPERATING INSTRUCTIONS TO OWNER’S PERSONNEL.

Instruction Time ________ hours.

CL-2

Download from Www.Somanuals.com. All Manuals Search And Download.

OPERATING DATA:

RECORD THE FOLLOWING INFORMATION FROM THE PRESSURES AND TEMPERATURES MODES WHEN

MACHINE IS IN A STABLE OPERATING CONDITION:

PRESSURE/TEMPERATURE

CIRCUIT A

CIRCUIT B

DISCHARGE PRESSURE

DP.A

DP.B

SUCTION PRESSURE

SP.A

SP.B

SATURATED CONDENSING TEMP

SATURATED SUCTION TEMP

LIQUID LINE TEMPERATURE*

DISCHARGE LINE TEMPERATURE*

RETURN GAS TEMPERATURE*

*Readings taken with a digital thermometer.

SCT.A

SST.A

SCT.B

SST.B

COOLER EWT

EWT

LWT

COOLER LWT

OUTDOOR-AIR TEMPERATURE

CONTROL POINT

OAT

CTPT

CAP

PERCENT TOTAL CAPACITY

LEAD/LAG LEAVING FLUID

DLWT

(Dual Chiller Control Only)

Compressor Running Current — All readings taken at full load.

COMPRESSOR MOTOR CURRENT

COMPRESSOR A1

COMPRESSOR A2

COMPRESSOR B1

COMPRESSOR B2

CONDENSER FAN MOTOR CURRENT

FAN MOTOR 1

FAN MOTOR 2

FAN MOTOR 3

FAN MOTOR 4

COOLER PUMP MOTOR CURRENT

COOLER PUMP 1

COOLER PUMP 2

CL-3

Download from Www.Somanuals.com. All Manuals Search And Download.

Record Software Versions

MODE — RUN STATUS

SUB-MODE ITEM

DISPLAY

ITEM

EXPANSION

VERS

MBB

CESR-131279- _ _-_ _

CESR-131171- _ _-_ _

CESR-131174- _ _-_ _

CESR-131227- _ _-_ _

MARQ

EMM

NAVI

(PRESS ENTER & ESCAPE SIMULTANEOUSLY TO OBTAIN

SOFTWARE VERSIONS)

COMMENTS:

_________________________________________________________________________________________

SIGNATURES:

START-UP

CUSTOMER

TECHNICIAN _____________________________

REPRESENTATIVE _____________________________

DATE ___________________________________

DATE ________________________________________

CL-4

Download from Www.Somanuals.com. All Manuals Search And Download.

III. Unit Start-Up (cont)

RECORD CONFIGURATION SETTINGS

UNIT (Configuration Settings)

SUBMODE

ITEM

DISPLAY

DESCRIPTION

VALUE

UNIT

UNIT CONFIGURATION

COMPRESSOR A1 SIZE

COMPRESSOR A2 SIZE

COMPRESSOR B1 SIZE

COMPRESSOR B2 SIZE

SUPERHEAT SETPOINT

REFRIGERANT

SZA.1

SZA.2

SZB.1

SZB.2

SH.SP

REFG

FAN.S

XX.X ∆F

FAN STAGING SELECT

PRESS ESCAPE KEY TO DISPLAY ‘UNIT’. PRESS DOWN ARROW KEY TO DISPLAY ‘OPT1’.

PRESS ENTER KEY. RECORD CONFIGURATION INFORMATION BELOW:

OPTIONS1 (Options Configuration)

SUBMODE

ITEM

DISPLAY

DESCRIPTION

VALUE

OPT1

UNIT OPTIONS 1 HARDWARE

COOLER FLUID

FLUD

MLV.S

MMR.S

RG.EN

CPC

PM1E

PM2E

PM.P.S

PM.SL

PM.DY

PM.DT

ROT.P

EMM

YES/NO

ENBL/DSBL

ON/OFF

YES/NO

XX MIN

XXXX HRS

YES/NO

MINIMUM LOAD VALVE SELECT

MOTORMASTER SELECT

RETURN GAS SENSOR ENABLE

COOLER PUMP CONTROL

COOLER PUMP 1 ENABLE

COOLER PUMP 2 ENABLE

COOLER PMP PERIODIC STRT

COOLER PUMP SELECT

COOLER PUMP SHUTDOWN DLY

PUMP CHANGEOVER HOURS

ROTATE COOLER PUMPS NOW

EMM MODULE INSTALLED

CL-5

Download from Www.Somanuals.com. All Manuals Search And Download.

III. Unit Start-Up (cont)

PRESS ESCAPE KEY TO DISPLAY ‘OPT1’. PRESS DOWN ARROW KEY TO DISPLAY ‘OPT2’.

PRESS ENTER KEY.

RECORD CONFIGURATION INFORMATION BELOW.

OPTIONS2 (Options Configuration)

SUBMODE

OPT2

ITEM

DISPLAY

DESCRIPTION

UNIT OPTIONS 2 CONTROLS

CONTROL METHOD

VALUE

CTRL

SCNA

SCNB

BAUD

LOAD

LLCS

XXX

SCN ADDRESS

SCN BUS NUMBER

SCN BAUD RATE

LOADING SEQUENCE SELECT

LEAD/LAG CIRCUIT SELECT

HIGH LCW ALERT LIMIT

MINUTES OFF TIME

LCWT

DELY

XX.X ∆F

ICE.M

CLS.C

LS.MD

LS.ST

LS.ND

LS.LT

ENBL/DSBL

00:00

XXX %

ICE MODE ENABLE

CLOSE CONTROL SELECT

LOW SOUND MODE SELECT

LOW SOUND START TIME

LOW SOUND END TIME

LOW SOUND CAPACITY LIMIT

RSET (Reset Configuration Settings)

SUBMODE

ITEM

DISPLAY

DESCRIPTION

VALUE

RSET

RESET COOL TEMP

COOLING RESET TYPE

CRST

MA.DG

RM.NO

RM.F

RM.DG

RT.NO

RT.F

RT.DG

DMDC

DM20

SHNM

SHDL

SHTM

DLS1

DLS2

LLEN

MSSL

SLVA

XX.X °F

XXX.X °F

XX.X °F

XXX.X °F

XX.X °F

XXX %

XXX

XXX %

XXX

4-20 - DEGREES RESET

REMOTE - NO RESET TEMP

REMOTE - FULL RESET TEMP

REMOTE - DEGREES RESET

RETURN - NO RESET TEMP

RETURN - FULL RESET TEMP

RETURN - DEGREES RESET

DEMAND LIMIT SELECT

DEMAND LIMIT AT 20 MA

LOADSHED GROUP NUMBER

LOADSHED DEMAND DELTA

MAXIMUM LOADSHED TIME

DEMAND LIMIT SWITCH 1

DEMAND LIMIT SWITCH 2

LEAD/LAG CHILLER ENABLE

MASTER/SLAVE SELECT

SLAVE ADDRESS

XXX %

ENBL/DSBL

SLVE/MAST

XXX

LLBL

LLBD

LLDY

XXX

LEAD/LAG BALANCE SELECT

LEAD/LAG BALANCE DELTA

LAG START DELAY

PARA

YES/NO

PARALLEL CONFIGURATION

CL-6

Download from Www.Somanuals.com. All Manuals Search And Download.

III. Unit Start-Up (cont)

PRESS ESCAPE KEY TO DISPLAY ‘RSET’. PRESS DOWN ARROW KEY TO DISPLAY ‘SLCT’.

PRESS ENTER KEY.

RECORD CONFIGURATION INFORMATION BELOW:

SLCT (Setpoint and Ramp Load Configuration)

SUBMODE

ITEM

DISPLAY

DESCRIPTION

VALUE

SLCT

SETPOINT AND RAMP LOAD

COOLING SETPOINT SELECT

RAMP LOAD SELECT

COOLING RAMP LOADING

SCHEDULE NUMBER

CLSP

RL.S

CRMP

SCHD

Z.GN

ENBL/DSBL

X.X

DEADBAND MULTIPLIER

PRESS ESCAPE KEY SEVERAL TIMES TO GET TO THE MODE LEVEL (BLANK DISPLAY). USE THE

ARROW KEYS TO SCROLL TO THE SET POINT LED. PRESS ENTER TO DISPLAY SETPOINTS.

RECORD CONFIGURATION INFORMATION BELOW:

SETPOINT

SUBMODE

COOL

ITEM

DISPLAY

DESCRIPTION

COOLING SETPOINTS

COOLING SETPOINT 1

COOLING SETPOINT 2

ICE SETPOINT

VALUE

CSP.1

CSP.2

CSP.3

XXX.X °F

HEAD PRESSURE SETPOINTS

CALCULATED HP SETPOINT A

CALCULATED HP SETPOINT B

BRINE FREEZE SETPOINT

BRINE FREEZE POINT

HEAD

FRZ

HD.P.A

HD.P.B

XXX.X °F

BR.FZ

XXX.X °F

CL-7

Download from Www.Somanuals.com. All Manuals Search And Download.

III. Unit Start-Up (cont)

COMPONENT TEST

USE ESCAPE/ARROW KEYS TO ILLUMINATE CONFIGURATION LED. PRESS ENTER TO DISPLAY ‘DISP’.

PRESS ENTER AGAIN TO DISPLAY ‘TEST’ FOLLOWED BY ‘OFF’. PRESS ENTER TO STOP DISPLAY AT

‘OFF’ AND ENTER AGAIN SO ‘OFF’ DISPLAY FLASHES. ‘PASS’ AND ‘WORD’ WILL FLASH IF PASSWORD

NEEDS TO BE ENTERED. PRESS ENTER TO DISPLAY PASSWORD FIELD AND USE THE ENTER KEY FOR

EACH OF THE FOUR PASSWORD DIGITS. USE ARROW KEYS IF PASSWORD IS OTHER THAN STANDARD.

AT FLASHING ‘OFF’ DISPLAY, PRESS THE UP ARROW KEY TO DISPLAY ‘ON’ AND PRESS ENTER. ALL LED

SEGMENTS AND MODE LEDS WILL LIGHT UP. PRESS ESCAPE TO STOP THE TEST. PRESS ESCAPE TO

RETURN TO THE ‘DISP’ DISPLAY. PRESS THE ESCAPE KEY AGAIN AND USE THE ARROW KEYS TO ILLU-

MINATE THE SERVICE TEST LED. PRESS ENTER TO DISPLAY ‘TEST’. PRESS ENTER TO STOP DISPLAY

AT ‘OFF’ AND ENTER AGAIN SO ‘OFF’ FLASHES. PRESS THE UP ARROW KEY AND ENTER TO ENABLE

THE MANUAL MODE. PRESS ESCAPE AND DISPLAY NOW SAYS ‘TEST’ ‘ON’. REFER TO THE TABLE

BELOW.

Service Test Mode and Sub-Mode Directory

KEYPAD

ENTRY

ITEM

Completed

(Yes/No)

SUB-MODE

TEST

ITEM DISPLAY

COMMENT

EXPANSION

ON/OFF

SERVICE TEST MODE

To Enable Service Test Mode,

move Enable/Off/Remote

Contact switch to OFF. Change

TEST to ON. Move switch to

ENABLE.

ENTER

OUTPUTS AND PUMPS

FAN 1 RELAY

SIZES 010-018,

Condenser fan at low speed

SIZES 022-030

ENTER

FAN1

FAN2

ON/OFF

Condenser fan A1 energized

SIZES 032-055,

Condenser fan A2 energized

SIZES 022-030,

Condenser fan A2 energized

SIZES 032-040,

FAN 2 RELAY

Condenser fan B1 at high speed

SIZES 042-055,

OUTS

Condenser fan B2 energized

CLP.1

CLP.2

ON/OFF

COOLER PUMP 1 RELAY

COOLER PUMP 2 RELAY

COOLER/PUMP HEATER

REMOTE ALARM RELAY

CL.HT ON/OFF

RMT.A ON/OFF

CIRCUIT A COMPRESSOR TEST

COMPRESSOR A1 RELAY

ENTER

CC.A1 ON/OFF

CC.A2 ON/OFF

CMPA

CMPB

COMPRESSOR A2 RELAY

MLV

ON/OFF

MINIMUM LOAD VALVE RELAY

CIRCUIT B COMPRESSOR TEST

COMPRESSOR B1 RELAY

ENTER

CC.B1 ON/OFF

CC.B2 ON/OFF

See Note

COMPRESSOR B2 RELAY

MLV

ON/OFF

MINIMUM LOAD VALVE RELAY

NOTE: If the unit has a single circuit, the Circuit B items will not appear in the display, except the ability to configure circuit B will be displayed.

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

Book

PC 903

Catalog No. 533-00047

Printed in U.S.A.

Form 30RA-2T

Pg CL-8

1-03

Replaces: 30RA-1T

Tab

Download from Www.Somanuals.com. All Manuals Search And Download.

Shoprider Mobility Aid UL8W User Manual
Singer Sewing Machine 99K28 User Manual
Singer Sewing Machine 112 1 User Manual
Snapper Lawn Aerator 4553 User Manual
Sony Camcorder CCD TR3300E User Manual
Sony Camcorder NEX FS100U User Manual
Sony Camcorder RM LVR2V User Manual
Sony Car Stereo System CDX 4150RDS User Manual
Sony eBook Reader 4 260 631 121 User Manual
Swisher Lawn Mower ONFT1150 User Manual