York Ycw Series Ld11556 User Manual

FAN COIL

AIR CONDITIONERS

NEW RELEASE

Form 115.20-NOM6 (1106)

INSTALLATION, OPERATION, & MAINTENANCE

MODELS: YCW SERIES

YCW Series

2-pipe, 4-pipe

2-pipe, cooling with electric heat

LD11554

Basic YCW Series Unit

LD11555

YCWE with Bottom Return

Option (shown)

LD11556

Basic YCW Series with Optional

Wall Panel (shown)

Notes:

1. For proper operation, control valve must be normally closed.

2. Aquastats provided where required.

3. Electric Heat is available as an option.

***** WARNING TO INSTALLER, SERVICE PERSONNEL AND OWNER *****

Altering the product or replacing parts with non-authorized factory parts voids all warranty or

implied warranty and may result in adverse operational performance and/or a possible hazardous

safety condition to service personnel and occupants. Company employees and/or contractors are

not authorized to waive this warning.

FORM 115.20-NOM6 (1106)

INSTALLATION

RECEIVING

Material in this shipment has been inspected at the

factory and released to the transportation agency in

good condition. When received, a visual inspection of

all cartons should be made immediately.Any evidence

of rough handling or apparent damage should be noted

on the delivery receipt and the material inspected in

the presence of the carrier’s representative.

form (platform not provided), hung on a closet wall

(use wall hanging kit option) or recessed in a wall

between wall studs (use front panel kit option).

FEATURES

Non-corrosive drain pan, installed in sloped position,

¾” female primary and secondary connections acces-

sible from either side or bottom.

If damage is found, a claim should be

ﬁled against the carrier immediately.

Filters provided, are 1” throwaway accessible from

the front.

Coils and fan motor/blower assemblies accessible

from the front, when installed with the optional front

panel assembly.

STORAGE

If the equipment is not to be immediately installed,

store it in a dry location with the motor protected

against moisture, dust, corrosion and physical damage.

If units are to be stored for six months or longer, see

long term storage requirements (Form 50.20-NM3).

Front air return standard, optional bottom return avail-

able but requires bottom return option.

Options available are thermostats, wall front panels,

condensate pan overﬂow switch, closet hanger bracket

kit, bottom return air kit and chilled water coil valve

packages. Consult applications group @ 717-771-

7073 for details on ordering and availability of these

options.

DESCRIPTION

The YCW models are available as 2-pipe cooling

(YCW), 2-pipe cooling with electric heat (YCWE)

and a 4-pipe heating/cooling (YCW-HW).All units are

provided with a 3-speed fan control in the control box

in the fan section (left side), with 24v access on the top

panel, left. Manual and auto changeover thermostats

and the T200 auto speed control thermostats can be

used with this unit. Twenty-four volt (24 v) power is

provided in the unit for thermostat operation.

Cabinet is fully insulated with 1” coated ﬁberglass

panels.

All units have 0” clearance to combustible surfaces,

so the units can be installed against wall studs and

drywall.

The 2-pipe cooling unit is provided with a single coil

with connections on the top panel, right side.

CLEARANCES

Clearance required in front of the unit to provide

access to coils, electrical controls and motor/blower

assembly. This clearance should be equal to the depth

of the cabinet.

The 2-pipe cooling with electric heat is provided

with a single chilled water coil and electric heat ele-

ments; coil connections are on the top panel, right

side; electrical connections are on the top panel, left

side and the units are provided with a disconnect on

the front panel.

MOUNTING - YCW UNIT STYLE

Recessed In Wall

The 4-pipe heating/cooling unit is provided with 2

coils with single end sheets – cooling connections are

on the top panel, right side and the hot water connec-

tions are on the top panel, middle front.

All units must be installed level to insure proper drain-

age and operation.

1. Frame the unit as required so the front panel

of the wall unit will be ﬂush with the drywall

surface when installed (see Fig. 3).

This unit is designed to be installed vertically in the

upﬂow position and can be installed on a closet plat-

JOHNSON CONTROLS

FORM 115.20-NOM6 (1106)

INSTALLATION

2. Frame around the perimeter of the unit as

required for securing the drywall. See Table 1

below for drywall openings.

5. Install the wall panel to the front of the unit using

the 1/4-20 x 1-1/2” long, painted, Phillips head

screws (four on unit sizes 3, 4, 6 and 8; six on

unit sizes 10 and 12) (1/4” cage nuts are located

in the slotted front panel of the unit).

TABLE 1 - DRYWALL OPENINGS

DRYWALL CUTOUT DIM

6. Remove the lower return air grille to get access

to the ﬁlter.

MODEL NUMBER

HT x WD

3YWC

4YWC

6YWC

8YWC

10YWC

12YWC

28 x 42

28 x 50

28 x 58

28 x 66

28 x 74

28 x 82

7. See Fig. 2 for unit details and dimensions.

Hung on a Closet Wall

Unit can be mounted in a closet using the bracket

support option 90PK3.

3. Mount the unit in its permanent location, making

sure it is level to insure proper drainage and

operation (two 1/2” holes have been provided

on each end of the unit for securing the unit to

the wall studs).

These brackets mount to the top, back of the cabinet.

See Fig 3 for location.

The unit should be isolated from the wall to be sure

sound is not transferred from the unit to the wall.

4. After the drywall has been installed, recheck to

make sure the unit’s front panel is ﬂush with the

exterior drywall surface. Shimming of the unit

may be required to get a seal between the unit

and panel.

Platform Mounted in a Closet

Unit can be set on a platform (provided by others) in

a closet.

Be sure to allow for sufﬁcient space below the platform

for drain piping.

CW UNITS:

CHILLED WATER

CONNECTION

CROSS MEMBER - TOP &

BOTTOM (PLACE UPPER CROSS

MEMBER 3" ABOVE UC UNIT)

VERTICAL 2X 4

POWER SUPPLY

WIRING

WALL STUDS

THERMOSTAT

WIRING

2 X 4 WALL

STUD

DRY WALL

CLOSET MOUNT:

BRACKET

PLACEMENT

FOR HANGING

WALL PANEL FRAME

HOT

WATER

INLET

HOT

WATER

OUTLET

CROSS MEMBER

(ON EDGE)

MOUNT UNIT

FLUSH WITH

Note: Front edge of unit to

be flush with dry wall.

DRY WALL (1/2"

MIN. IN FRONT

OF WALL STUD)

RECESSED WALL UNIT TOP VIEW

2 X 4 WALL STUD

ATTACH UNIT TO FRAMING

USING SIX SCREWS/NAILS

IN CABINET LOCATIONS

DRY WALL

LEAVE SUFFICIENT SPACE

FOR DRAIN PIPING 10" TO 12"

MIN. RECOMMENDED

SHOWN

WALL PANEL FRAME

SCREW

DETAIL OF WALL PANEL FRAME INSTALLATION

SUPPORT FRAMING

LD11695A

FIG. 3 – CW-HW RECESSED WALL and CLOSET

MOUNTING

JOHNSON CONTROLS

FORM 115.20-NOM6 (1106)

INSTALLATION

DUCTWORK

The YCW-HW units (4-pipe heating/cooling) are

provided as standard 120 volt power wired to a dis-

connect/terminal block and a ground lug. Fan motor

hi, med and low speed leads are wired to the control

board. There may be an unused motor lead from the

motor – its needs to be capped off. The board is also

wired to handle either 24v or 120v control wiring. To

use 24v, remove jumpers on the control board. For

your 24v hot water control valve, wire it in series

with the “W” connection. For your 24v chilled water

control valve, wire it in series with the “Y” connection.

For 24v wiring using a T420 manual C/O, T421 auto

C/O or the T200 speed control thermostats, you will

need a 7-wire thermostat cable minimum.

Ductwork recommendations are as follows:

• Insulate to prevent condensation during

cooling.

• Size to the unit openings are generally

acceptable but are determined by the engineering

drawings.

• Be sure units are ducted per local codes or

national codes, as applicable.

WIRING

Units are provided with wiring diagrams and name-

plate data to provide information required for neces-

sary ﬁeld wiring. All wiring must comply with local

and national code requirements.

The YCWE units (2-pipe cooling w/electric heat)

are provided as standard 208/240 volt power wired

to a disconnect switch with a ground lug. Fan motor

hi, med and low speed leads are wired to the control

board. There may be an unused motor lead from the

motor – its needs to be capped off. The board is also

wired to handle either 24v or 120v control wiring.

To use 24v, remove jumpers on the control board.

The transformer in the control box is 208/240v with

a common terminal, one for 208v and one for 240v.

Transformer is wired 240v from factory; for 208v ap-

plication, move the ORG wire on the transformer to

the 208v terminal. For your 24v chilled water control

valve, wire it in series with the “Y” connection. When

using a T420 manual C/O, T421 auto C/O or the T200

speed control thermostats, you will need a 7-wire

thermostat cable minimum. See Table 2 for MCA and

MFS for each unit size/electric heat KW size.

Refer to Fig. 3 for access locations.

These units are provided with a class 2 transformer

for 24-volt control circuits. Should any add-on equip-

ment also have a class 2 transformer furnished, care

must be taken to prevent interconnecting outputs of

the two transformers by using a thermostat with isolat-

ing contacts. These units are supplied with a 3-speed

control board.

The YCW units (2-pipe cooling) are provided as

standard 120 volt power wired to a disconnect/terminal

block and a ground lug. Fan motor hi, med and low

speed leads are wired to the control board. There may

be an unused motor lead from the motor – it needs to

be capped off. The board is also wired to handle either

24v or 120v control wiring. To use 24v, remove jump-

ers on the control board. To use a 24v chilled water

control valve, wire the valve in series with the “Y”

connection from the control box, max of 20va.

Any devices such as fan switches or

thermostats that have been furnished

by the factory for field installation

must be wired in strict accordance with

the wiring diagram that is supplied

with the unit. Failure to do so could

result in damage or injury.

For 24v wiring using a T420 manual C/O, T421 auto

C/O or the T200 speed control thermostats, you will

need a 6-wire thermostat cable minimum.

JOHNSON CONTROLS

FORM 115.20-NOM6 (1106)

Table 2 - ELECTRICAL DATA

MAX.OVERCURRENT

PROTECTION

TOTAL AMPS

MIN. CIR. AMPACITY

UNIT MODEL

240V

208V

0.0

0.8

1.5

2.3

3.0

0.0

1.5

2.3

3.0

3.8

4.5

0.0

2.3

3.0

3.8

4.5

6.0

0.0

2.3

3.8

4.5

6.0

7.5

240V

208V

N/A

240V

N/A

208V

N/A

240V

N/A

208V

N/A

1.1

5.3

4.7

4CWE

9.4

8.3

13.6

17.8

1.1

11.9

15.5

N/A

9.4

8.3

13.6

17.8

21.9

26.1

1.7

11.9

15.5

19.1

22.7

N/A

6CWE

8CWE

10CWE

N/A

14.2

18.4

22.5

26.7

35.0

2.7

12.5

16.1

19.7

23.5

30.5

N/A

15.2

23.5

27.7

13.5

20.7

24.3

31.5

38.8

44.4

JOHNSON CONTROLS

FORM 115.20-NOM6 (1106)

INSTALLATION

PIPING

All piping connections are 5/8" OD copper tubing

(see Fig.4).

• Whensolderingtobronzeorbrass,heatthepiping

while in the socket/cup and begin introducing the

solder when the ﬂux boils rapidly. Avoid direct

ﬂame into the solder joint.

The supply and return piping must be adequately

sized to meet the design water ﬂow requirements as

speciﬁed for the speciﬁc installation. All chilled water

piping must be insulated to prevent condensation. It

is also recommended that all piping be insulated to

prevent freezing when piping is run in an uncondi-

tioned space.

• Heat can only be applied to the cup of the valve

body for a minimal time before damage occurs

(even with the use of wet rags).

• Avoid rapid quenching of solder joints, as this

will produce joints of inferior quality.

• Connect all piping per accepted industry

standards and observe all regulations governing

installation of piping systems. When all

connections are complete, the system must be

pressure tested. Repair any solder joint leaks and

gently tighten any leaking valve packing nuts

and piping accessories as required. Hydronic

systems are not designed to hold pressurized air

and should only be tested with water.

Coil freeze protection is recommended

for applications where the fan coil is

located in ambient air locations (attics,

crawl spaces, etc.) or within structures

that may be unoccupied during freez-

ing conditions. Consult the factory for

additional information.

Piping Precautions

When connecting piping or valve

kits to fan coil units, do not bend or

reposition the coil header tubing for

alignment purposes. This could cause

a tubing fracture resulting in a water

leak when water pressure is applied

to the system

• Flush all piping prior to connection to remove

all debris.

• Use wet cotton rags to cool valve bodies when

soldering.

• Open all valves (midway for hand valves,

manually open on motorized valves) prior to

soldering.

LD12277A

FIG. 4 – CW-HW SERIES UPFLOW WALL/ CLOSET FAN COILS

4-Pipe Chilled Water-Hot Water (190 - 1085 CFM)

JOHNSON CONTROLS

FORM 115.20-NOM6 (1106)

INSTALLATION

Drain Piping

Condensate drain lines must be installed with adequate

slope away from the unit to assure positive drainage.

Since the drain pan is located on the suction side of

the blower, a negative pressure exists at the drain pan

and a minimum trap of 1-1/2" must be provided in the

drain line to assure proper drainage.

Drain connections, primary and secondary, are 3/4"

MPT (see Fig. 5 for details).

On units with plastic drain pans the

drain connections must be made hand

tight only.

LD12278

CONDENSATE DRAIN CONNECTIONS

(With drain cover removed)

(Thermoplastic pan shown)

FIG. 5 – CWE SERIES WALL/CLOSET FAN COILS

Chilled Water with Electric Heat

JOHNSON CONTROLS

FORM 115.20-NOM6 (1106)

SEQUENCE OF OPERATION

YCW With a Chilled Water Coil

The unit will respond to a cooling command from

the thermostat by powering a water control valve

open. The fan will operate at the speed selected at the

thermostat. When the space reaches the temperature

setpoint at the thermostat, the cooling valve will close

and the fan will continue to operate.

When using the T200 thermostat, the stat will auto-

matically regulate the fan speed based on the differ-

ence between the space temp and setpoint - @ 4˚F off

setpoint, the fan will run @ HI; @ 3˚F off setpoint, the

fan will run @ MED; @ 2˚F off setpoint, the fan will

run @ LO. When the thermostat is satisﬁed, the water

valve will be deenergized and the fan will revert to

LO speed.

When using the T420 manual C/O thermostat and the

TB3-3/TB2-5 jumper is in place, the fan will con-

tinue to operate at the fan speed selected. Removing

the jumper will cause the fan to shut down when the

thermostat is satisﬁed.

The YCWE With Both a Chilled Water Coil and

Electric Heating Coil.

The unit control thermostat, on a call for heating, will

energize the heater contactor(s). When the thermostat

is set for cooling, it will energize the chilled water

valve on a call for cooling. The fan will operate at

the speed selected at the thermostat. When the space

reaches the temperature setpoint at the thermostat,

the cooling valve will close (on cooling) or the heat-

ing contactors will open (on heating) and the fan will

continue to operate.

When using the T200 thermostat, the stat will auto-

matically regulate the fan speed based on the differ-

ence between the space temp and setpoint - @ 4˚F off

setpoint, the fan will run @ HI; @ 3˚F off setpoint, the

fan will run @ MED; @ 2˚F off setpoint, the fan will

run @ LO. When the thermostat is satisﬁed, the water

valve will be deenergized and the fan will revert to

LO speed.

When using the T420 manual C/O thermostat and the

TB3-3/TB2-5 jumper is in place, the fan will con-

tinue to operate at the fan speed selected. Removing

the jumper will cause the fan to shut down when the

thermostat is satisﬁed.

The YCW-HW with Both a Chilled Water Coil and a

Hot Water Coil.

The unit control thermostat, on a call for heating, will

energize the hot water control valve. When the ther-

mostat is set for cooling, it will energize the chilled

water valve on a call for cooling. The fan will operate

at the speed selected at the thermostat. When the space

reaches the temperature setpoint at the thermostat, the

cooling valve will close (on cooling) or the heating

valve will close (on heating) and the fan will continue

to operate.

When using the T421 auto C/O thermostat and the

TB3-3/TB2-5 jumper is in place, the fan will con-

tinue to operate at the fan speed selected. Removing

the jumper will cause the fan to shut down when the

thermostat is satisﬁed.

When using the T200 thermostat, the stat will auto-

matically regulate the fan speed based on the differ-

ence between the space temp and setpoint - @ 4˚F off

setpoint, the fan will run @ HI; @ 3˚F off setpoint, the

fan will run @ MED; @ 2˚F off setpoint, the fan will

run @ LO. When the thermostat is satisﬁed, the water

valve will be deenergized (on cooling) or the heating

contactor will open (on heating) and the fan will revert

to LO speed.

When using the T420 manual C/O thermostat and the

TB3-3/TB2-5 jumper is in place, the fan will con-

tinue to operate at the fan speed selected. Removing

the jumper will cause the fan to shut down when the

thermostat is satisﬁed.

When using the T421 auto C/O thermostat and the

TB3-3/TB2-5 jumper is in place, the fan will con-

tinue to operate at the fan speed selected. Removing

the jumper will cause the fan to shut down when the

thermostat is satisﬁed.

JOHNSON CONTROLS

FORM 115.20-NOM6 (1106)

MAINTENANCE

MOTOR

The blower motor should be cleaned annually and if it

has oiling ports, it should be oiled with a good grade

of SAE 20 oil. Normally a few drops of oil in each

bearing is sufﬁcient.

To ensure proper maintenance of the ﬁlters, it is best

to follow an organized maintenance procedure. The

following one is recommended:

Divide the total number of units on the job into six

equal groups. Each week inspect, clean or replace

the ﬁlters in each group, in rotation. This insures

a uniform servicing interval. The interval may be

lengthened or shortened as determined by experience.

If inspection shows only the room-air ﬁlter to be dirty,

this one alone should be replaced.

COIL

The coil must be kept clean by any of the following

methods.

1. Cleaning with low-pressure compressed air.

2. Flushing or rinsing with water (a detergent is

advisable for greasy surfaces).

Dirty ﬁlters reduce the air and heating

capacities of the unit. When the ﬁlters

are excessively dirty, the unit heating

capacity will be so reduced that it is in-

effective for heating the room. When

a room fails to heat, always check the

ﬁlters.

FILTERS

Clean or replace air ﬁlters regularly

CLEAN UNIT INTERIOR

The intervals at which ﬁlters require replacement

depend on local conditions.

Once a year clean the fans and coils of the unit thor-

oughly. Remove the access panel as necessary.

Because of dust and lint in the room, room-air ﬁlters

load up much more rapidly than outdoor-air ﬁlters.

Under normal conditions, the room air ﬁlter requires

replacement every six to eight weeks.

Wipe the interior of the unit clean with a rag. Wipe

the motor and inside and outside of the fan housings.

(In cooling units, clean out the drain pan.)

JOHNSON CONTROLS

FORM 115.20-NOM6 (1106)

This Page Intentionally Left Blank

JOHNSON CONTROLS

FAN COILS START-UP CHECKLIST

INSTALL CHECKLIST

❑

Equipment received as ordered.

Unit checked for damage interior and exterior.

Make sure all ductwork is complete and available for full air ﬂow.

Unit installed level to ensure proper drainage and operation.

Unit installed with proper clearances.

Ensure condensate water will drain toward the drain connection. An overﬂow drain may be required as a back up to a clogged

primary drain.

❑

Check that coil(s), valves and piping have been leak checked and insulated as required.

Main coil drain pan must be properly trapped and charged with water before units are started.

Ensure that all air has been vented from the system.

Return valves to their proper operating positions prior to start-up.

Repair any solder joint leaks and gently tighten any leaking valve packing nuts and piping accessories as required.

Install all panels.

CLEANING CHECKLIST

❑

Installer has cleaned out interior.

Ensure drain pan free from foreign material.

Ensure air ﬁlters are clean, installed properly and secured. Use the directional arrows or other information on the ﬁlter to

determine the proper ﬂow direction.

CONTROLS CHECKLIST

❑

Check that supply voltage matches nameplate data.

Ensure that the unit is properly grounded.

Controls installation complete

Check all electrical connections for tightness.

Review electrical print for correct wiring.

FAN INSPECTION - The fan should be inspected and cleaned, in conjunction with maintenance of the motor and bearings. It is

important to keep the wheel clean in order to avoid imbalance and vibration.

❑

Check tightness of fan bearing locking collar.

With power off, check blower wheel set screws for tightness and ensure that the blower wheel(s) rotate freely and quietly.

Check tightness of all motor base and mounting bolts.

Check motor connections to ensure that they are secure and made in accordance with the wiring diagram

Rotate all moving components manually. Adjust as required.

NOTE: If the motor and fan have not been operated in the last (4) four weeks or more, lubricate all the bearings and rotate the motor and fan

monthly to prevent moisture from accumulating in the bearings. (See Form 50.20-NM3, Long Term Storage)

Tele. 800-861-1001

www.York.com

P.O. Box 1592, York, Pennsylvania USA 17405-1592

Subject to change without notice. Printed in USA

Form 115.20-NOM6 (1106)

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