Honeywell perfect climate comfort center control system User Manual
Perfect Climate Comfort Center™
PC8900A
W8900A-C
GENERAL
This document contains information on the Perfect Climate
Comfort Center™ Control System including components and
accessories. Some components and accessories include the
PC8900A Control Panel, W8900A-C Remote Module,
C7189A Remote Indoor Sensor, C7089A Outdoor Sensor,
C7100A Discharge Air Sensor, CO2 Monitor, CM8900A
Communication Module, and W8735B Telephone Access
Module.
The Comfort Center control system provides 24 Vac energy
saving control for a heating and cooling system, while
providing reliable and precise temperature, ventilation and
humidity control.
Control System
PRODUCT DATA
FEATURES
The PC8900A mounts in the living space and accurately
measures and controls room temperature and humidity.
• Only four wires required for installation.
• Large, continuously lit LCD.
• Seven-day (auto copy) programming.
• Simultaneous display of heat and cool setpoints.
• Keyboard lockout protection available.
• No batteries required, indefinite program retention.
• Circulation fan setting improves indoor air quality.
• Field configurable for:
— Automatic or manual changeover.
— °F or °C display.
— 12- or 24-hour clock.
— Adaptive Intelligent Recovery™ control or conven-
tional recovery.
— Humidity control in heating or cooling.
— Outdoor, remote, and discharge temperature sen-
sors available.
— Fan overrun in cooling.
— Ventilation control.
The W8900A-C mounts near the equipment. The
PC8900A, heating, cooling, ventilation and
dehumidification equipment and all additional sensors
are wired to the W8900A-C.
• Compatible with most 24 Vac Systems.
• Remote sensor, discharge sensor, outdoor sensor and
CO
monitor available.
2
• Optional remote communications available.
Contents
General ............................................................................. 1
Features ........................................................................... 1
Specifications .................................................................... 2
Ordering Information ........................................................ 2
Installation ........................................................................ 5
Wiring Diagrams ............................................................... 9
W8900A,C Hookup Diagrams ....................................... 9
W8900B Hookup Diagrams ........................................... 14
W8900A,B,C Humidity Control Hookup Diagrams ........ 18
Installer Setup ................................................................... 24
Programming PC8900A .................................................... 27
Checkout .......................................................................... 33
Operation .......................................................................... 34
Troubleshooting ................................................................ 40
Glossary ........................................................................... 44
® U.S. Registered Trademark
Copyright © 2001 Honeywell • All Rights Reserved
68- 0173- 3
SPECIFICATIONS
IMPORTANT
The specifications given in this publication do not
include normal manufacturing tolerances; therefore,
an individual unit might not exactly match the listed
specifications. Also, this product is tested and calibrated under closely controlled conditions, and some
minor differences in performance can be expected if
those conditions are changed.
Models:
The PC8900A Comfort Center™ Control Panel mounts in the
living space and accurately measures and controls room
temperature and humidity. The W8900A-C Remote Module
provides a wiring panel and switching for the Perfect Climate
Comfort Center™ Control System. See Table 1.
System Components and Accessories (See Fig. 1):
C7089A1002 Outdoor Sensor: Used to measure outdoor tem-
perature.
C7100A1015 Discharge Air Sensor: Used to sense tempera-
ture in discharge or return air.
C7189A1001 Remote Indoor Sensor: Used for remote sensor
applications.
CM8900A1009 Communication Module: Used for remote
communication.
W8735B1003 Telephone Access Module: Used for remote
communication.
202689A Mounting Plate Accessory: Used when C7189A
Remote Indoor Sensor cannot cover wall marks from old
thermostat.
205224A Wall Cover Plate: Used when PC8900A Control
Panel cannot cover wall marks from old thermostat.
32007496-001 Replacement Door: Used for PC8900A Control
Panel.
Dimensions:
205224A: See Fig. 2.
C7089A: See Fig. 3.
C7100A: See Fig. 4.
C7189A: See Fig. 5.
PC8900A: See Fig. 6.
W8900A-C: See Fig. 7.
Operating Ambient Temperature Range:
NOTES: System is capable of turning on heat at 0°F (-18°C).
C7089A: -40° to 128°F (-40° to 53°C).
C7100A: 40° to 150°F (4° to 66°C).
C7189A: 40° to 95°F (4° to 35°C).
PC8900A: 40° to 110°F (4° to 43°C).
W8900A-C: -40° to 150°F (-40° to 66°C).
Shipping Temperature Range (All Components): -20° to
150°F (-29° to 66°C).
Operating Relative Humidity Range (All Components):
5 percent RH to 90 percent RH, noncondensing.
Mounting Means:
C7089A Outdoor Sensor: Mounts outside of living space using
locally obtained mounting hardware.
C7100A Discharge Air Sensor: Mounts in discharge air duct,
near air exchanger in a 2 x 4 in. outlet box or on a flat duct
or plenum surface. The temperature sensor probe passes
through a 7/8 in. knockout in the 2 x 4 in. outlet box.
C7189A Remote Indoor Sensor: Mounts directly on the wall
using mounting screws and anchors provided.
PC8900A Control Panel:
Without Remote Sensor: Mounts directly on the wall in liv-
ing space using mounting screws and anchors provided.
With Remote Sensor: Mounts directly on the wall in a
closet or other convenient location using mounting
screws and anchors provided.
W8900A-C Remote Module: Mounts directly on the wall, near
HVAC equipment or cold air return, using mounting screws
and anchors provided.
Table 1. W8900A-C Models.
Model
System Type
W8900A Conventional 2
Use with
Heat
Stages
Cool
Stages
a
2
Ven t
Adjustment
Humidity
Adjustment Heat
Humidity
Adjustment Cool Use with
yes yes yes PC8900A
W8900B Heat pump 3 2 yes yes yes PC8900A
W8900C Conventional 2 2 yes yes
a
Models with O and B terminals have single stage cooling.
b
Uses reheat. See Operation section.
yes
b
PC8900A
ORDERING INFORMATION
When purchasing replacement and modernization products from your TRADELINE® wholesaler or distributor, refer to the
TRADELINE® Catalog or price sheets for complete ordering number.
If you have additional questions, need further information, or would like to comment on our products or services, please write or
phone:
1. Your local Home and Building Control Sales Office (check white pages of your phone directory).
2. Home and Building Control Customer Relations
Honeywell, 1885 Douglas Drive North
Minneapolis, Minnesota 55422-4386 (800) 328-5111
In Canada—Honeywell Limited/Honeywell Limitée, 35 Dynamic Drive, Scarborough, Ontario M1V 4Z9.
International Sales and Service Offices in all principal cities of the world. Manufacturing in Australia, Canada, Finland, France,
Germany, Japan, Mexico, Netherlands, Spain, Taiwan, United Kingdom, U.S.A.
68-0173—3 2
Finish:
C7189A Wall Mount Remote Indoor Sensor: Premier White®
color.
PC8900A Control Panel: Premier White® color.
W8900A-C Remote Module: Charcoal gray color.
Clock Accuracy: ± 1 minute per month.
Approvals:
FCC Class B: Pending.
NEMA DC-3: Not required.
Batteries: No batteries required. During power outages, time
is retained for six hours. All programmed setpoints and
times are retained indefinitely.
Resistance Characteristics of Sensors:
C7089A Outdoor Sensor: PTC Sensor. See Fig. 39 in the
Operation section for sensor resistance characteristics.
C7100A Discharge Air Sensor: See Fig. 39 in the Operation
section for sensor resistance characteristics.
C7189A Remote Indoor Sensor: NTC Sensor. See Fig. 40 in
the Operation section for sensor resistance characteristics.
Auxiliary Heat and Emergency Heat Indication: PC8900A
display indicates when auxiliary heat and emergency heat
are activated.
Input Ratings:
20 to 30 Vac, 50/60 Hz.
Heat Pump Failure Input (L Terminal on W8900B Models):
24 Vac load, 50/60 Hz, 0.3 VA load.
CO2 Monitor Input (CO
els): 24 Vac load, 50/60 Hz, 0.3 VA load.
Terminal on all W8900A-C Mod-
2
Output Ratings:
Humidity Control Output Relay: 50 VA at 24 Vac.
Ventilation, W1, W2, Y1, Y2, E, G, O, B, AUX, Y1/W1:
a. 1.5A running, 3.5A inrush at 200,000 cycles
(30 Vac).
b. 1.5A running, 7.5A inrush at 100,000 cycles
(30 Vac).
Run: 40% power factor minimum.
Inrush: 50% power factor minimum.
Temperature Setting Range: PC8900A: 45° to 88°F
(7° to 31°C).
Humidity Setting Range:
PC8900A: 10 to 80% RH.
Cooling: 40 to 80% RH.
Heating: 10 to 80% RH.
Calibration: C7089A, C7100A, C7189A, and PC8900A are
factory calibrated and require no field calibration.
Monitors: The W8900A-C allows for connection of a
CO
2
Monitor with uncommitted contacts.
CO
2
PC8900A
Comfort Center™
Control Panel
C7189A
Remote Indoor Sensor
C7089A
Outdoor Sensor
W8735B
Telephone Access
Module
CM8900A
Communication Module
Fig. 1. System components and accessories.
W8900A-C
Remote Module
C7100A
C7100A
Discharge Air Sensor
Discharge Air Sensor
3 68-0173—3
6
(152)
7/8
(22)
7/8
(22)
1-1/2 (38)
3-1/4 (83)
8-1/2 (216)
M7513
Fig. 2. Dimensions for 205224A Wall Cover
Plate in in. (mm).
3/4
(19)
13-1/4 (336)
Fig. 4. Dimensions for C7100A Discharge Air Sensor in in. (mm).
M4488
Fig. 3. Dimensions for C7089A Outdoor Sensor
Mounting Clip in in. (mm).
1-3/16
1-13/16
(30)
(46)
1-3/16
(30)
1-13/16
(46)
M4461
4-5/8
(117)
2-3/4 (70)
M4465
FRONT VIEW SIDE VIEW FRONT VIEW (COVER OFF)
Fig. 5. Dimensions for C7189A Remote Indoor Sensor in in. (mm).
68-0173—3 4
1-1/8
(29)
4-5/8
(117)
3-1/4
(83)
2-3/4 (70)
3-3/8
(86)
7/8
(22)
7/8
(22)
6 (152)
3-1/4 (83)
6-3/8 (162)
4
(102)
1-5/8 (41)
8-3/4
(222)
7-13/16
(197)
4
(102)
SYSTEM
CHECK
SET
CLOCK
SELECT
PERIOD
CANCEL
SYSTEM
HEAT OFF COOL
HUMIDITY
DAY
TIME
TIME
FAN
AUTO ON CIRC
VENTILATE
HEAT/COOL
SETPOINTS
HOLD
RUN
NOTE:
PC8900 SHOWN WITH
COVER REMOVED.
Fig. 6. Dimensions for PC8900A Control Panel in in. (mm).
MERCURY NOTICE
If this control is replacing a control that contains
mercury in a sealed tube, do not place your old control
in the trash.
Contact your local waste management authority for
instructions regarding recycling and the proper
disposal of this control or of an old control containing
mercury in a sealed tube.
If you have questions, call Honeywell Inc. at
1-800-468-1502, Monday through Friday, 7:00 a.m. to
5:30 p.m., Central time.
M6356
1/2 (12)
3/4
(19)
2
(51)
NOTE: W8900 SHOWN WITH COVER REMOVED.
4-7/8 (124)
(4) 3/8 (5)
6-3/8 (163)
6-3/8 (163)
M6355
Fig. 7. Dimensions for W8900A-C Remote
Module in in. (mm).
INSTALLATION
When Installing this Product…
1. Read these instructions carefully. Failure to follow
instructions can damage the product or cause a
hazardous condition.
2. Check the ratings on the product to make sure the
product is suitable for your application.
3. Installer must be a trained, experienced service
technician.
4. After completing installation, use these instructions to
check out product operation.
5 68-0173—3
CAUTION
Disconnect power supply before wiring to prevent
electrical shock or equipment damage.
Mounting the W8900A-C Remote Module
Locate the W8900A-C in the equipment room near the HVAC
equipment. See Fig. 8.
CAUTION
Do not mount the W8900A-C inside any HVAC
equipment. Mounting the W8900A-C inside HVAC
equipment can cause damage to the W8900A-C.
1. Grasp the top edge of the W8900A-C cover, either at
the center or both corners, and pull it off fro m t h e b a s e .
2. Locate the four mounting holes. See Fig. 9.
3. Position the W8900A-C on wall or cold air return. Level
the W8900A-C for appearance only; the device will
function properly even when not level. Use a pencil to
mark the mounting holes on the wall.
WALL
MOUNTING
HOLES (4)
W8900
W8900
FURNACE OR BOILER
WATER HEATER
M4459
Fig. 8. W8900A-C location example.
4. Remove the W8900A-C from the wall, and drill 3/16 in.
holes in the wall (if drywall) as marked. For firmer material such as plaster or wood, drill 7/32 in. holes. Gently
tap anchors (provided) into drilled holes until flush with
the wall.
5. Reposition the W8900A-C over the holes. Loosely insert
the four mounting screws (included) into the holes.
MOUNTING
SCREWS (4)
M4463
Fig. 9. Mounting W8900A-C Remote Module.
Wiring the W8900A-C to the HVAC Equipment
CAUTION
Disconnect power supply before connecting
wiring to prevent electrical shock or equipment
damage.
Wiring must comply with applicable codes, ordinances, and
regulations.
IN REPLACEMENT INSTALLATION:
1. Locate the terminal wiring strip on the old thermostat.
2. Note the wire color for each wiring terminal used.
3. Remove the wires connected to the old thermostat and
other controls. Tape off unused wires.
4. Use Table 2 or 3 to identify the W8900A-C terminal
labels. Connect the same loads that were connected to
the old thermostat to the W8900A-C Remote Module
with a new bundle of 18-gauge color-coded thermostat
wire; see Fig. 10. See Fig. 11 through 20 for wiring diagrams for specific equipment applications.
68-0173—3 6
IMPORTANT
Be sure to connect the C terminal to transformer
common.
W8900
IN NEW INSTALLATION:
1. Locate the terminal strip(s) on the HVAC equipment.
2. Refer to Fig. 11 through 20 for wiring diagrams for spe-
cific equipment applications.
FOR STRAIGHT
CONNECTION—
STRIP 5/16 IN. (8 MM)
3. Connect all loads to the appropriate W8900A-C wiring
terminal using 18-gauge, color-coded thermostat wire;
see Fig. 10.
4. Use a small screwdriver to connect the loads. Do not
FOR WRAPAROUND
CONNECTION—
STRIP 7/16 IN. (11 MM)
overtighten; device can be damaged.
M4464
Fig. 10. Proper wiring technique for
W8900A-C and PC8900A.
Table 2. Conventional Applications (W8900A or C).
W8900A, C Terminal Designation Function Existing Thermostat Designation
1 PC8900A Control Panel —
2 PC8900A Control Panel —
3 PC8900A Control Panel —
4 PC8900A Control Panel —
B Heating, changeover valve B
C 24 Vac Transformer Common C
CO
2
Carbon Dioxide Monitor —
VNT VNT Relay —
G Fan Relay G
GND Ground —
HUM Humidity Relay —
OUT Outdoor Air Temperature Sensor —
O Cooling, Changeover Valve O
R 24 Vac System Transformer R
RC 24 Vac Cooling Transformer RC
RH 24 Vac Heating Transformer RH
S, S1 Remote Air Temperature Sensor —
See note a Fan Control—Evaporative Cooling F
See note b Heat Pump Contactor P
T, T1 Discharge Air Temperature Sensor —
W1 Heating Relay W
W1 Stage 1 Heat Relay W1
W2 Stage 2 Heat Relay W2
Y1 Cooling Relay Y
Y1 Stage 1 Cool Relay Y1
Y2 Stage 2 Cool Relay Y2
See note c Fan Control (Honeywell dual fuel thermostat [T834]) 1
See note c Fan Control (Honeywell dual fuel thermostat [T834]) 2
See note d Filter Light X
none Remote Timer Contacts Z
a
PC8900A/W8900A,C are not compatible with evaporative cooling equipment.
b
In single stage heat pump applications, jumper W1 and Y1 and connect to Y. Configure the system for Auto Fan in Heat.
c
Dual fuel fan feature configured in installer setup.
d
Filter light feature available in PC8900A fan accumulation timer feature.
7 68-0173—3
Table 3. Heat Pump Applications (W8900B).
Existing Thermostat
Designations
(Customer Specials)
W8900B Terminal
Designations
Function
Existing Thermostat
Designations
(Standard)
1 PC8900A Control Panel — —
2 PC8900A Control Panel — —
3 PC8900A Control Panel — —
4 PC8900A Control Panel — —
AUX
a
Stage-3 heat control (strip heat) W3 —
B Heating, changeover valve B —
C 24 Vac transformer common C X,B
CO
2
Carbon dioxide monitor — —
E Emergency heat relay E K
VNT VNT relay — —
G Fan relay G F
GND Ground — —
L System monitor L L
O Cooling, changeover valve O R
R 24 Vac system transformer R V
S, S1 Remote Air Temperature Sensor — —
T, T1 Discharge Air Temperature Sensor — —
W2
Y1/W1
Y1/W1
Y1/W1
Y1/W1
b
c
c
c
c
Stage-2 heat control (compressor) W2 H2,Y,R4
Compressor contactor — RS
Compressor contactor Y M
Stage-1 cool control Y1 C1,M
Stage-1 heat control W1 H1,R3
Y2 Stage-2 cool control Y2 C2
None Clogged filter switch or common connection X X1,X2,C
None Defrost — P
None HSII Control Panel — L,C,H
None LEDs — A,A1,A2,Z,C,L
None LO and HI speed fan relays — R1,R2
None Momentary circuit, changeover — O
None Outdoor thermistor T A
d
Out
a
AUX controls the auxiliary heat like W2, and allows additional stages of auxiliary heat with outdoor thermostats while maintaining the proper second stage anticipation.
b
For systems without 2nd stage heat, configure W2 to No.
c
For systems requiring separate W1 and Y1 terminals for proper heat pump operation, refer to Fig. 18 and 19.
d
Replace existing sensor with C7089A Outdoor Sensor.
External temperature readout, T relay — —
68-0173—3 8
WIRING DIAGRAMS
W8900A,C Hookup Diagrams
CO2 MONITOR
1
L2
L1
(HOT)
HEATING
TRANSFORMER
3
HUMIDIFIER
OR DEHUMIDIFIER
EQUIPMENT
5
VENTILATION
EQUIPMENT
PC8900
1
2
3
4
6
4
CO
2
1
2
3
4
GND
C
R
RH
RC
HUM
HUM
VNT
VNT
W8900A,C
7
2
C7189A REMOTE AIR
TEMPERATURE SENSOR
S1
S
T1
T
OUT
OUT
LED
G
Y2
Y1
W1
W2
C7100 DISCHARGE AIR
TEMPERATURE SENSOR
FAN RELAY
STAGE 2
COOL RELAY
STAGE 1
COOL RELAY
STAGE 1
HEAT RELAY
STAGE 2
HEAT RELAY
C7089A OUTDOOR AIR
TEMPERATURE SENSOR
L1
(HOT)
L2
1
COOLING
TRANSFORMER
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
1
2
JUMPER R TO RH FOR SINGLE HEAT TRANSFORMER APPLICATIONS.
3
CONFIGURE PC8900 FOR HUMIDITY CONTROL IN HEATING MODE
(HUMIDIFIER) OR COOLING MODE (DEHUMIDIFIER) DURING INSTALLER SETUP .
4
W8900 ALLOWS CONNECTION OF A CO MONITOR WITH UNCOMMITTED CONTACTS.
5
SEE VENTILATION INSTRUCTIONS FOR WIRING.
6
GROUNDING THE GND TERMINAL IS NOT RECOMMENDED.
CONNECTION FOR CM8900A REMOTE COMMUNICATIONS MODULE.
7
2
Fig. 11. Hookup diagram for heating/cooling system in conventional system with multiple transformers.
9 68-0173—3
M4479D
1
L2
L1
(HOT)
SYSTEM
TRANSFORMER
3
HUMIDIFIER
OR DEHUMIDIFIER
EQUIPMENT
CO2 MONITOR
4
PC8900
1
2
3
4
6
CO
1
2
3
4
GND
C
R
RH
RC
HUM
HUM
VNT
VNT
W8900A,C
2
7
2
C7189A REMOTE AIR
TEMPERATURE SENSOR
S1
S
T1
T
OUT
OUT
LED
G
Y2
Y1
W1
W2
C7100 DISCHARGE AIR
TEMPERATURE SENSOR
C7089A OUTDOOR AIR
TEMPERATURE SENSOR
FAN RELAY
STAGE 2
COOL RELAY
STAGE 1
COOL RELAY
STAGE 1
HEAT RELAY
STAGE 2
HEAT RELAY
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
VENTILATION
5
EQUIPMENT
2
JUMPER R TO RH TO RC FOR SINGLE TRANSFORMER APPLICATIONS.
3
DURING INSTALLER SETUP, CONFIGURE PC8900 FOR HUMIDITY CONTROL IN HEATING MODE
(HUMIDIFIER) OR COOLING MODE (DEHUMIDIFIER).
4
W8900 ALLOWS CONNECTION OF A CO MONITOR WITH UNCOMMITTED CONTACTS.
5
SEE VENTILATION INSTRUCTIONS FOR WIRING.
6
GROUNDING THE GND TERMINAL IS NOT RECOMMENDED.
7
CONNECTION FOR CM8900A REMOTE COMMUNICATIONS MODULE.
2
M4478D
Fig. 12. Hookup diagram for 1-stage or 2-stage heating and cooling in conventional system with single transformer.
68-0173—3 10
L2
L1
(HOT)
SYSTEM
TRANSFORMER
3
HUMIDIFIER OR
DEHUMIDIFIER
EQUIPMENT
4
PC8900
1
CO2 MONITOR
1
2
3
4
6
CO
1
2
3
4
GND
C
R
RH
RC
HUM
HUM
VNT
VNT
W8900A,C
2
7
2
C7189A REMOTE AIR
TEMPERATURE SENSOR
S1
S
T1
T
OUT
OUT
LED
G
Y2
Y1
W1
W2
C7100 DISCHARGE AIR
TEMPERATURE SENSOR
FAN RELAY
STAGE 1
COOL RELAY
C7089A OUTDOOR AIR
TEMPERATURE SENSOR
VENTILATION
5
EQUIPMENT
PILOT
1ST
OPERATOR
DUAL VALVE COMBINATION
GAS CONTROL
POWER SUPPLY. PROVIDE DISCONNECT
1
MEANS AND OVERLOAD PROTECTION
AS REQUIRED.
2
JUMPER R TO RH TO RC FOR SINGLE
TRANSFORMER APPLICATIONS.
3
DURING INSTALLER SETUP, CONFIGURE PC8900 FOR HUMIDITY CONTROL IN HEATING MODE
(HUMIDIFIER) OR COOLING MODE (DEHUMIDIFIER).
4
W8900 ALLOWS CONNECTION OF A CO MONITOR WITH UNCOMMITTED CONTACTS.
5
SEE VENTILATION INSTRUCTIONS FOR WIRING.
6
GROUNDING THE GND TERMINAL IS NOT RECOMMENDED.
7
CONNECTION FOR CM8900A REMOTE COMMUNICATIONS MODULE.
COM
2ND
OPERATOR
MAIN
VALVE
2
IGNITER
MV
MV/PV
PILOT GAS
SUPPLY
PV
SENSOR
GND
(BURNER)
PILOT
BURNER
GROUND
24V
GND
S8610U
24V
TH-W
VENT
DAMPER
PLUG
LIMIT
CONTROLLER
SENSE
D892 VENT
DAMPER
SPARK
M4489D
Fig. 13. Hookup diagram for heating/cooling intermittent pilot gas burning ignition system.
11 68-0173—3
HUMIDIFIER OR
3
DEHUMIDIFIER
EQUIPMENT
VENTILATION
8
EQUIPMENT
CO2 MONITOR
4
PC8900
9
W8900A,C
CO
2
1
2
3
4
1
2
3
4
GND
C
R
RH
RC
HUM
HUM
VNT
VNT
2
ZONE 2 THERMOSTAT
10
7
C7189A REMOTE AIR
TEMPERATURE SENSOR
S1
S
T1
T
OUT
OUT
LED
G
Y2
Y1
W1
W2
7
ZONE 3 THERMOSTAT
C7100 DISCHARGE AIR
TEMPERATURE SENSOR
C7089A OUTDOOR AIR
TEMPERATURE SENSOR
7
ZONE 4 THERMOSTAT
L2
L1
(HOT)
GC
W
5
R8239A1052
CYRG
24V
W
6
ZONE 1
VALVE
2
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
1
JUMPER R TO RH TO RC FOR SINGLE TRANSFORMER APPLICATIONS.
2
DURING INSTALLER SETUP, CONFIGURE PC8900 FOR HUMIDITY CONTROL IN HEATING MODE
3
(HUMIDIFIER) OR COOLING MODE (DEHUMIDIFIER).
W8900 ALLOWS CONNECTION OF A CO MONITOR WITH UNCOMMITTED CONTACTS.
4
5
USE ONE R8239 FOR EVERY FOUR ZONES.
6
USE FOR 3-WIRE ZONE VALVE OR DAMPERS.
ZONES 2, 3, 4 CAN BE CONTROLLED BY ADDITIONAL PC8900/W8900 OR OTHER THERMOSTATS.
7
8
SEE VENTILATION INSTRUCTIONS FOR WIRING.
9
GROUNDING THE GND TERMINAL IS NOT RECOMMENDED.
10
CONNECTION FOR CM8900A REMOTE COMMUNICATIONS MODULE.
RW
R8222B1067
ZONE 2
VALVE
GC
R8222B1067
6
RW
ZONE 3
VALVE
GC
R8222B1067
6
R
ZONE 4
VALVE
M4491D
Fig. 14. Hookup diagram for 3-wire zone valves in Series 20 heating system with zone controls.
68-0173—3 12
CO2 MONITOR
PC8900
L2
1
L1
(HOT)
SYSTEM
TRANSFORMER
HUMIDIFIER OR
2
DEHUMIDIFIER
EQUIPMENT
3
CO
2
1
2
3
4
5
1
2
3
4
GND
C
R
RH
RC
HUM
HUM
VNT
VNT
W8900A,C
6
C7189A REMOTE AIR
TEMPERATURE SENSOR
S1
S
T1
T
OUT
OUT
LED
G
Y2
Y1
W1
W2
C7100 DISCHARGE AIR
TEMPERATURE SENSOR
FAN RELAY
STAGE 1
COOL RELAY
C7089A OUTDOOR AIR
TEMPERATURE SENSOR
4
VENTILATION
EQUIPMENT
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
1
DURING INSTALLER SETUP, CONFIGURE PC8900 FOR HUMIDITY CONTROL IN HEATING MODE
2
(HUMIDIFIER) OR COOLING MODE (DEHUMIDIFIER).
3
W8900 ALLOWS CONNECTION OF A CO MONITOR WITH UNCOMMITTED CONTACTS.
4
SEE VENTILATION INSTRUCTIONS FOR WIRING.
5
GROUNDING THE GND TERMINAL IS NOT RECOMMENDED.
6
CONNECTION FOR CM8900A REMOTE COMMUNICATIONS MODULE.
2
L1
(HOT)
L2
1
OIL PRIMARY
Fig. 15. Hookup diagram in oil heating/electric cooling system (oil primary has its own transformer).
T
M4490D
T
13 68-0173—3
W8900B Hookup Diagrams
1
L2
L1
(HOT)
3
7
VENTILATION
EQUIPMENT
CO2 MONITOR
COMPRESSOR
MONITOR
PC8900
1
2
3
4
8
SYSTEM
TRANSFORMER
HUMIDIFIER OR
DEHUMIDIFIER
EQUIPMENT
4
W8900B
CO
2
L
1
2
3
4
GND
C
R
RH
HUM
HUM
VNT
VNT
2
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
1
JUMPER R TO RH.
2
3
DURING INSTALLER SETUP, CONFIGURE PC8900 FOR HUMIDITY CONTROL IN HEATING MODE
(HUMIDIFIER) OR COOLING MODE (DEHUMIDIFIER).
4
W8900 ALLOWS CONNECTION OF A CO MONITOR WITH UNCOMMITTED CONTACTS.
CONFIGURE PC8900 FOR CHANGEOVER IN HEATING MODE OR COOLING MODE.
5
IF SEPARATE Y1 AND W1 TERMINALS ARE REQUIRED, REFER TO FIGURES 18 AND 19.
6
SEE VENTILATION INSTRUCTIONS FOR WIRING.
7
GROUNDING THE GND TERMINAL IS NOT RECOMMENDED.
8
CONNECTION FOR CM8900A REMOTE COMMUNICATIONS MODULE.
9
CONFIGURE PC8900 FOR NO CONNECTION TO TERMINALS Y2, E, AUX AND W2 FOR
10
SINGLE-STAGE HEAT PUMP SYSTEM.
9
C7189A REMOTE AIR
TEMPERATURE SENSOR
S1
S
T1
T
OUT
OUT
LED
O/B
G
Y2
Y1/W1
E
AUX
W2
10
2
C7100 DISCHARGE AIR
TEMPERATURE SENSOR
CHANGEOVER
5
RELAY
FAN RELAY
COMPRESSOR
CONTACTOR
EMERGENCY
HEAT RELAY
AUXILIARY
HEAT RELAY
C7089A OUTDOOR AIR
TEMPERATURE SENSOR
6
M4483D
Fig. 16. Hookup diagram for 2-stage heat/1-stage cool in heat pump system.
68-0173—3 14
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