Honeywell Heat Pump W7620 User Manual

Honeywell

W7620 SINGLE ZONE CONTROL SYSTEM

PROVIDES CUSTOMIZED CONTROL OF HVAC

S I N G L E Z O N E E Q U I P M E N T . S P E C I F I C

FEATURES THIS SYSTEM OFFERS INCLUDE:

COMMUNICATION, APPLICATION FLEXIBILITY,

D I R E C T D I G I T A L C O N T R O L , E A S Y

INSTALLATION AND PROGRAMMING, AND

INCREASED EQUIPMENT RELIABILITY.

W7620 Base Controller provides:

four relay outputs

network communication

T7660 Space Temperature Sensor inputs

W7621 Expansion Input Point Boards provide ad-

ditional input point expansion on one board of up

to:

two resistive inputs

two digital inputs

two voltage inputs (one dry contact, one

extended 24 Vac input)

W7622 Expansion Output Point Boards provide ad-

ditional output point expansion on one board of

up to:

three analog outputs

three digital outputs

T7660 Space Temperature Sensor provides up to:

one space temperature input

one space temperature &point

one override push button/LED indication

Cl Up to four heat/four cool conventional or four-

compressor heat pump

Flexible control options:

analog/humidity

switch

packaged or integrated economizer

indoor air quality switches

HG/KH

8/91

Form Number 63-4224

©Honeywell 1991

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SYSTEM DESCRIPTION . . .

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CHECKOUT . . . . . . . . . . . . .

SPECIFICATIONS. .

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ACCESSORIES . . . . . . . . . . . .

WHEN PURCHASING REPLACEMENT AND MODERNIZATION

PRODUCTS FROM YOUR AUTHORIZED SYSTEMS

DISTRIBUTOR, REFER TO TRADELINE CATALOG OR PRICE SHEETS FOR COMPLETE ORDERING NUMBER.

IF YOU HAVE ADDITIONAL QUESTIONS, NEED FURTHER

PRODUCTS OR SERVICES; PLEASE WRITE OR PHONE:

INFORMATION

OR WOULD LIKE To COMMENT ON OUR

1 .

YOUR LOCAL

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AND BUILDING CONTROLS SALES

REPRESENTATIVE.

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AND BUILDING CONROLS

CUSTOMER

SERVICE HONEYWELL INC., 1885 DOUGLAS DRIVE NORTH,

MINNEAPOLIS, MINNESOTA 55422, (612) 542-7500.

IN CANADA - HONEYWELL LIMITED/HONEYWELL LIMITEE, 740 ELLESMERE ROAD, SCARBOROUGH ONTARIO

CANADA M1P 2VP.

INTERNATIONAL SALES AND SERVICE OFFICES IN ALL PRINCIPAL CITIES OF THE WORLD.

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th e RS-485 CNAP n etwork. Th e CNAP n etwork en ables

com m u n ication to m u ltiple W7620 Zon e Con trollers as

well as to oth er con trollers , su ch as th e W7600 Con trol

Modu le, 47640 NIU or a Q7650 PC Interface Card in

a PC with ZM7603 Rem ote Mon itorin g s oftwa re. Refer

to th e ZM7601 Con figu ration Tool/ ZM7603 Rem ote

Mon itorin g software specification s h eet, Form 63-4272,

Th e W7620 Sin gle Zon e Con trol System is Hon eywell’s

n ew line of sin gle zon e con trol produ cts. Th e W7620,

can con ven ien tly m on itor an d con trol in dividu al HVAC

zon e equ ipm en t.

System featu res in clu de CNAP (Con trol Network

Au tom ation

Protocol) com m u n ication ,

application

flexibility, DDC (Direct Digital Con trol), n etwork

in tegration , easy in stallation an d program m in g, an d

in crea s ed equ ipm en t reliability.

for

m ore detailed description.

Th rou gh th e CNAP n etwork, th e con troller can be

provided with in form ation s p ecific to its con trolled zone

Th e basic W7620 Sin gle Zon e Con troller h as bu ilt-in

capability to process I/ O (In pu t/ Ou tpu t) data, ru n DDC

program s, an d com m u n icate alon g with oth er devices on

th e CNAP n etwork. See W7620 fam ily ph oto.

on ly, or with in form ation n ecessary for

grou p of zon e

con trollers. ZM7601/ ZM7603 software can, in tu rn , be

provided with periodic in form ation on a n y con troller data

for m on itorin g, data gath erin g, or report gen eratin g. See

Figu re 1.

Th e W7620 Sin gle Zone Con troller is a DDC device.

DDC h as a con trol loop wh ich periodically u pdates th e

ou tpu ts as

fu n ction of

set of m easu red in pu ts an d

given set of algorith m s. The advan tages of DDC a re:

Th e W7620 Zon e Con trol System was design ed for

application flexibility. Sim ply by ch an gin g th e algorith m

wh ich is stored in EBPROM an d by determ in in g th e inpu t

a n d ou tpu t requ irem en ts, th e sam e

Control

Th e W7620 Sin gle Zon e Con troller provides soph isticated

control loops for accurate control of single zone equipment

th at preven ts tem peratu re droop an d provides greater

com fort in th e zon e.

be applied in a variety of applications.

Maintainability

‘Ike W7620 Baseboard provides in pu t dedicated to th e

T7660 Space Tem peratu re Sen sor (space tem peratu re,

rem ote s etpoin t, bypass switch with LED feedback, and

CNAP com m u n ication con n ection s). Th e baseboard on ly

provides fou r SPST (Single Pole, Sin gle Throw) relays.

A variety of sm all poin t, sin gle zon e or h eat pu m p

applications can be m et by u sin g on ly th e W7620.

Use of a sin gle program m ed com pu ter redu ces

requ irem en ts for calibration ch ecks becau se th ere are

fewer in tercon n ected an alog com pon en ts. Periodic

recalibration is au tom atically perform ed.

Reliability

ble Read

EEPROM (Electrically Erasable Program m a

On ly Mem ory) an d EPROM (Erasable Programmable

Read On ly Mem ory) h old th e con trol program and

param eters eliminating th e n eed for a battery.

The W7621 In pu t Board adds two resistive, on e digital,

on e AC in pu t, an d two voltage in pu ts th a t can be u sed

for a variety of in pu ts depen din g on application . On e

W7621 in pu t board can be added to th e W7620 Zon e

con troller.

Communlcatlon

Networkin g con trollers togeth er on

RS-485 n etwork

u s in g CNAP software provides in form ation for in tegration

of con trol fu n ction s, m on itorin g, tren din g, alarm in g, an d

report gen era tion .

The W7620 Sin gle Zon e Con troller can be applied in

stan d-alon e en viron m en t with distribu ted zon e con trol

a n d h ard-wired tim e-of-day fu n ction a lity It can also be

applied as part of a n etworked system via con n ection to

6 3 -4 2 2 4

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Figure

CNAP Network Diagram

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Th e W7622 ou t p u t b oa r d h a s

selection of ou t p u t s

Th e S7610 P OT is a h a n d -h eld &vice t h a t p r ovid es a

m ean s to set, test, and monitor point and parameter values.

Th e P OT u t ilizes t h e R S-485 CNAP n eh vor k for

d ep en d in g on th e m od el number. On e ou t p u t b oa r d of

any type ca n be added to the W7620 Zon e Con tr oller .

com m u n ication an d connects

ca b le t o a n RJ11 ja ck a t t h e T7660 Zon e Temperature

Sensor, or t o a n RJ11 ja ck in sid e t h e con t r oller case.

Th e P OT can com m u n ica t e t o an y controller

to t h e con tr oller th r ou gh

Th e W7622 drives any output (for heat, cool, etc.), either

digital or an alog. Fu n ction depends upon application . Th e

r ela y ou t p u t s h a ve b ot h n or m ally open a n d n or m ally

on t h e

closed con tacts. Th e a n a log ou tpu ts ar e 0-10 Vdc.

network. See th e S7610 Zon e Con t r ol P OT Gu id e, Form

63-4225, fo r in fo r m a t io n o n o p e r a t io n . S e e F ig u r e 3.

Th e ‘I7660 i s

p la t in u m R T D (R e s is t iv e T e m p e r a t u r e

Device) that is placed in th e zone for temperature r eadin gs.

ar e available with or with ou t a n in tegr a l setpoint

adju stm en t dial or a n occupant override pu sh bu tton with

sta tu s L E D (F ig u r e 2). T h e p u s h b u t t o n a llo w s s e t t in g

th e h eatin g or cooliig system to a n occupied mode when

t h e con t r ol syst em is in a n u n occu p ied mode. Also, it

can be used t o in it ia t e

c o n t i n u o u s unoccupied period.

The LED indicates t h e override sta tu s. These zone sen sor s

are furnished with an RJ 11 connector for local operation

o f a n S7610 P OT (P or t a b le Op e r a t or ’s Te r m in a l). (Se e

t h e T7660A-D

Sp a ce Te m p e r a t u r e Se n sor s In for m ation

a n d Installation sh eet , Form 63-4219, for more d eta ils.)

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Figure 3 -POT (Portable Operator’s Terminal)

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When installing this product . . .

1. Read these instructions carefully. Failure to follo

them could damage the product or cause

hazardous condition.

surface-before removing the W7621 or W7622

expansion board from the antistatic bag.

Failure to do so might damage the board.

2. Check the ratings given in the SPECIFICATION:

section and on the product to make sure that the

product is suitable for the application.

3. The installer must be

trained, experienced

service or installation technician.

4. After installation is complete, check system

operation as provided in these instructions.

Mount the controller in a location that allows clearance

for wiring, servicing and removal of the cover.

5. Verify that the W7620s are installed in accordan

with the job drawings and these installation

procedures.

1. Remove the cover by loosening the two side

screws (Figure 4) and mount the controller in

location appropriate to the equipment being

controlled.

6. Verify that the T7660 Space Temperature Sensor

installed in accordance with job drawings and the

T7660 Specification Sheet (63-4219).

2. Use No. 8 sheet metal screws (obtain locally) to

secure the controller to the mounting surface

through the four key holes inside the

3. Test the controller and equipment operation.

4. Replace and secure the controller cover after

wiring is complete.

Disconnect power supply before beginning

installation to prevent electrical shock and

equipment damage.

Mountlng Additional Boards

To install additional input or output expansion boards

(W7621 or W7622) which are not manufacturer installed

on the base board assembly (Figure 5) complete the

following:

1. Align the IO-pin connector (J4) or (J5) on the

baseboard with the 10-pin inverse connector on

the input board (J15) or output board (13).

radiate radio frequency energy.

not installed

and used in accordance with the instruction

manual, it may cause interference to radio

communications. Pursuant to FCC Rules,

Subpart J of Part 15, this equipment has

been tested and found to comply with the

limits for a Class A computing device. These

limits are designed to provide reasonable

protection against interference when operating

in a commercial environment. Operating this

equipment in a residential environment is

likely to cause interference, in which case the

user at his own expense will be required to

take whatever measures necessary to correct

the interference.

2. Align the white plastic standoff tab with the hole

located near the lo-pin connector.

3. Lean the input or output board in at the base to

catch the metal tab located on the bottom of the

controller.

4. Snap the board into place

5. Secure the board into place by applying and

tightening the two board screws provided with

each expansion board.

63-4224

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,&Knockout for l/2 in. conduit fittings.

Double knockout for

in. conduit fittings.

Figure 4

W7620 Mounting

10 PIN CONNECTOR

STANDOFF HOLE

PLASTIC

STANDOFF

Figure 5 -Mounting Additional Board

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Pull the pair of CNAP communication cables to each

controller on the network and connect to the screw

terminals marked CNAP +/- (Figure 6).

If securing screws are not used, the

expansion board will not be grounded. This

will result in improper operation or damage to

t h e device.

N O T E

Pow er Wire Lengths

1. Power requircmcnts limit 24 Vac power

transmission distance. The following data can be

used in calculating load versus wire length:

The W7620 Single Zone Application Guide, Form

63-4220, provides information on corresponding terminal

designations to function connections. Verify that the

wiring was done according to the wiring diagram provided

and the J/O Control Function Cross-Reference provided

on the inside cover of the W7620.

Device

W7620

output relay

Analog output

3.9

0.5

0.6

Wire as follows:

Power relay 4-10

1. strip

conductor.

inch (5 mm) insulation from the

2. The power relay load rating depends on the relay

used. Power relays can be wired to draw coil

current from separate 24 Vac supply.

2. Insert the wire in the required terminal location

and tighten screw terminal.

3. The operating voltage range for the W7620 is 20

Figure 6 illustrates the terminal arrangement in the

to 30 Vac.

controller. All controller

models are furnished

with

terminal arrangement similar to that shown in this figure.

Pull a pair of 24 Vac power cables from either an isolated

or shared transformer to each controller on the n e t

ml connect to Terminals TR and TR earth-ground.

work

Figure 6 -Terminal Designation Label

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3. Observe the fan or measure the output. If the

expected result is not achieved, measure the

resistance across the correct terminals (e.g.,

OUT1 A and C). The resistance should hold at

approximately1.0 when the output is ON.

T and Al). See the T7660 Space Temperature

Sensor specification sheet, Form 63-4219, for the

correct temperature to

resistance value

cross-reference.

4. If long sensor wiring is used,

resistance

supplied to the W7620 by both the temperature

sensor and the leadwire for greater accuracy.

Output Point Test Procedures

Testing outputs consists of observing the analog or digital

output states of physical points to see that the value or

state is comparable to the point value as displayed on

the S7610 POT or ZM760l/ZM7603 software. These

devices can be used to override the output point to a

known state to facilitate checkout. Use the following

procedures:

1. Set the override on an output point to a desired

value with the S7610 POT or ZM7601/ZM7603

software.

2. Measure or observe the output condition (e.g., fan

turns on).

3. If the output does not follow the command

override condition, isolate the problem by

checking connections and measurements at the

output destination as well as at the W7620.

4. Clear the override condition.

Example:

The following procedure is for Fan (can be

any one of the outputs, 1-7, depending on

output options selected, see W7620 Single

Zone/WSHP Application Guide, Form

63-4220.

1. Display Fan (OUT.) on the S7610 POT or

ZM7601/03 software.

2. Set into override the point to the desired state, ON

or OFF.

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The following steps for complete checkout and testing

of a W7620 are described fully below. The procedures

are as follows:

Testing physical points requires either the actual sensor

be at a known value or digital state, or that a simulated

known value or digital state be applied to the input point

terminals. In the case of physical output points, the output

condition of the controlled equipment must be known,

or the output terminals of the W7620 can be measured

with an indicating device or meter. The Hardware

Configuration Data table shows all of the possible physical

points with terminal designation and use. The General

Guide for Input/Output Point Testing table can be used

to determine what can be used to provide inputs and

what to use to measure outputs.

1. Check W7620 installation and wiring, including

power to the W7620.

2. Start-up W7620 (connect S7610 POT or

ZM7601/ZM7603 software) and assign a network

node address and application (even when using

device in a nonnetworked application). Refer to

W7620 Application Manual, Form 63-4220.

3. Test analog and digital input points

4. Test analog and digital output points.

5. Verify parameter point values.

1. Verify that the connections between the W7620

and peripheral equipment are secure.

Input Point lest Procedures

1. Read point value through the S7610 POT or the

ZM7601/ZM7603 software to verify approximate

analog value or digital state. If the data is

acceptable, proceed to the next point.

2. Verify that grounding is correct in accordance with

GROUNDING in this guide as follows:

a. Verify that each W7620 case is grounded

when the W7620s are powered from

individual transformers.

2. For analog points that display FA (sensor failure)

next to the engineering unit:

b. Verify that all W7620 cases are grounded

when the W7620s are powered from a

c - o n transformer.

a. Provide a known measurable value to the input.

b. Compare the input point value displayed on

the POT or ZM7601/ZM7603 software with

the known value.

c. Verify that if the application calls for grounded

transformer secondaries, that the grounded

side is connected to earth-ground on the

W7620 (TR earth-ground).

c. If the difference between the two values

exceeds the acceptable range, isolate the

problem by taking a measurement at the

input source, the conductors (e.g., cable,

wire), and the W7620.

d. Verify that neither of the CNAP network wires

is grounded or connected to the 24 Vac wires.

e. Verify that the polarization of the CNAP

network wires is correct, positive to positive

and negative to negative in alI cases.

Example:

The following is the procedure for input

Point 1 (SPACE TEMP).

3. Verify the CNAP network termination and biasing

resistors are installed in accordance with 47640

Network Interface Unit specification sheet

(63-4290).

1. Measure the input space temperature in degrees

Fahrenheit with another source, such as a

thermometer, near the actual sensor.

4. Turn on power and verify that each W7620 has at

least 20 Vac at Terminals TR and TR

earth-ground.

2. Verify that the S7610 POT or the

ZM76Ol/ZM7603 software value reads the

expected temperature.

3. If the accuracy of the measurement is in question,

measure resistance supplied by the sensor at the

Space Sensor itself to fmd sensed value Terminal

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Con n ect t h e gr ou n d wir e t o t h e green gr ou n d

screw on th e W7620 chassis. See Figure 7.

or removing connections from Terminals TR

and TR earth-ground.

2. To disable a controller, remove both legs of

the AC power. Removing only one leg may

prevent other controllers on the same

transformer from communicating on the

CNAP network.

connect the same side of the

transformer secondary to the same terminal

number on each W7620.

2. Grounded

Transformer

Secondaries: I f th e

h a s a gr ou n d ed secon dar y, it is

n ecessar y t o identify t h e grounded sid e. Use a n

oh m meter to test for con du ctivity between on e

side of the transformer and the suspected

The W7620 Zone Contr ol System m ust be earth-grounded

at each clu ster of W7620 con tr oller s (one or mote W7620

gr ou n d in g plan e (u su ally th e con tr oller ch assis).

If on e side of th e tr an sfor m er is grounded,

connect t h e gr ou n d ed secon dar y t o t h e

controllers powered by

No. 18 AWG or larger copper conductor r u n to

earth-ground, su ch a s water pipe driven into the earth

single 24 Vac tr an sfor m er ). Use

known

ea r th -gr ou n d

con n ection on th e W7620 (TR

or t h e gr ou n d con n ect ion fou n d w it h in t h e p ow er

distr ibution panel. The power distr ibution panel must be

ear th-gr ounded per National Electr ic Codes. Do not “se

the ductwork or th e wir in g con du it sin ce th ese do n ot

ear th -gr ou n d).

n ecessa r ily p r ovid e

good gr ou n d . Th e follow in g

to connect grounded secondary to

will cause damage to the

p r ovid es grounding details:

1 . Ear th -gr ou n d on e W7620 with in

group of

W7620s connected t o

given transformer.

Earth-ground each cluster at some

accessible point that is a good

distribution ground.

Tie each W7620 (using ground

screw) together in the cluster.

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Electrical Ratings

Supply Voltage 20-30 Vac, 50 or 60 HZ

8.5 VA maximum at 30 Vac, 50 or 60 HZ

System Current Draw

Inputs:

Resistive

29104370 ohm (-40 to 265°F temperature range with

platinum sensors)

Voltage

Digital

0-10 Vdc with 2 Vdc overrange

External contact (switch, relay or transistor) Into 15 Vdc, 15

AC Input

Up to three 24 Vac source indicating digital response to call

from same transformer, All three Inputs can be used

separately or together to determine the final state of input.

Outputs:

Analog O-IO Vdc, 20 mA maximum

Relay (expansion) 2.0 amp maximum running, 7.5 amp In-rush at 30 Vac, 50 or

60 Hz

Relay (base) 1.6 amp maximum running, 7.5 amp In-rush at 30 Vac, 50 or

60 Hz

Temperature Ratings

Ambient

40 to 110°F

to 44°C]

5-95% RH, noncondensing

any surface using anchoring screws (not provided

ctrical, temperature, and humidity ratings can be

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bl Knockout for l/2 in. conduit fittings.

Double knockout for 1 /2 or 3/4 in. conduit fittings.

Figure 8

W7620 Dimensions

63-4224

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Base Unit (with cover)

Input Expansion Boards

Use with W7459 Economizer Logic Module, modulating spring

Damper Actuator

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Canadian EMI

This digital apparatus does not exceed the Class A

limits for radio noise emission fmm digital apparatus

set out I” the Radio Regulations Of the

Canadian Department of Communications.

dens

Canada.

Please send your comments and suggestions to:

Honeywell Inc.

Dear Customer,

We welcome your comments and suggestions for Improving

8500 Bluewater N.W.

this publication.

Albuquerque. NM 87121-1958

ATTN: Technical Editor

Your assistance is greatly appreciated and will enable us to

provide better technical information for you.

HONEYWELL MINNEAPOLIS, MN 55408 INTERNATIONAL Sales offices I” all principal cities of the world. Manufacturing In

Australia, Canada, Finland, France, Germany, Japan, Mexico, Netherlands, Spain, Taiwan, United Kingdom, U.S.A.

PRINTED IN U.S.A.

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