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APPLICATION
The W8703A Damper Interface Module (DIM) controls
up to three conventional zone dampers when used with
T8635L Microelectronic Communicating Programmable
Thermostats and the W8635 Equipment Interface
Module, Table 1. The W8703A uses Enviracom, a low-
cost wired communications protocol.
Using the W8703A Damper Interface Module with up to
three T8635L Microelectronic Communicating Program-
mable Thermostats and a W8635A,B Equipment
Interface Module enables the following features:
• Time synchronization.
• Shared filter indication.
Model
Application
W8703A
Controls up to
three zone
dampers.
Required Accessories
1. T8635L Microelectronic Communicating Pro-
grammable Thermostat.
2. W8635A Equipment Interface Module for up to
2H/2C conventional applications or W8635B
Equipment Interface Module for up to 2H/1C heat
pump applications.
INSTALLATION
When Installing this Product . . .
1. Read these instructions carefully. Failure to follow
them could damage the product or cause a haz-
ardous condition.
2. Check the ratings given in the instructions and on
the product to make sure the product is suitable
for your application.
® U.S. Registered Trademark
Copyright © 2002 Honeywell •
Damper Interface Module
Table 1. W8703A Description.
Recommended Zone Dampers
Trol-A-Temp
Model AOBD
or
Trol-A-Temp
Model ARD
or
Trol-A-Temp
Model ZD
• All Rights Reserved
INSTALLATION INSTRUCTIONS
• Outdoor temperature display in all zones with only
one C7089B Outdoor Temperature Sensor
connected.
• Vacation Hold in all zones.
• Check LED in all zones (when used with the
W8635B Equipment Interface Module for heat
pumps).
• System switch setting automatically changes in all
zones.
• Individual fan control in each zone.
NOTES:
—
Up to three T8635 Thermostats can be con-
trolled with the W8703A Damper Interface
Module.
—
Up to six zones can be controlled using two
W8703A and up to nine zones can be con-
trolled using three W8703A.
Use with T8635L Microelectronic
Communicating Programmable
Thermostat and W8635A,B Equipment
Interface Modules.
3. Installer must be a trained, experienced service
technician.
4. After installation is complete, check out product
operation as provided in these instructions.
5. Follow local codes for installation and application.
CAUTION
Voltage Hazard.
Can cause electrical shock or equipment
damage.
Disconnect power before beginning installation.
Location
Locate the W8703A in the equipment room near the
HVAC equipment. See Fig 1.
W8703A
Comments
69- 1344- 1
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Related Manuals for Honeywell W8703A
Summary of Contents for Honeywell W8703A
- Page 1 T8635L Microelectronic Communicating Programmable W8635B Equipment Interface Module for heat Thermostats and the W8635 Equipment Interface pumps). Module, Table 1. The W8703A uses Enviracom, a low- • System switch setting automatically changes in all cost wired communications protocol. zones. • Individual fan control in each zone.
- Page 2 Voltage Hazard. 2. Locate the two mounting holes. See Fig 1. Can cause electrical shock or equipment 3. Position the W8703A on the wall or the cold air damage. return. Disconnect power before beginning installation.
- Page 3 HEAT 2 CLOSE RELAY COOL 1 OPEN (HOT) RELAY (HOT) CLOSE SYSTEM COOL 2 TRANSFORMER EXTERNAL RELAY 40 VA TRANSFORMER FACTORY INSTALLER JUMPERS. MODEL ARD MODEL AOBD OR ZD DAMPER ZONE DAMPER M13430A Fig. 4. T8635L/ W8703A/ W8635A wiring diagram. 69-1344-1...
- Page 4 W8703A DAMPER INTERFACE MODULE T8635L T8635L T8635L C7089B OUTDOOR TEMPERATURE SENSOR V8043F W8703A SWITCH TH-TR V8043F OPEN CLOSE OPEN SWITCH TH-TR CLOSE V8043F OPEN (HOT) CLOSE SWITCH EXTERNAL TH-TR 40 VA TRANSFORMER BOILER W8635A R8222N1011 (HOT) SYSTEM TRANSFORMER M20251A Fig. 5. Hydronic heat with V8043 zone valves and non-zoned air conditioning wiring diagram.
- Page 5 W8703A DAMPER INTERFACE MODULE T8635L T8635L T8635L C7089B OUTDOOR TEMPERATURE SENSOR V8043F W8703A SWITCH TH-TR V8043F OPEN CLOSE OPEN SWITCH TH-TR CLOSE V8043F OPEN (HOT) CLOSE SWITCH EXTERNAL TH-TR 40 VA TRANSFORMER BOILER W8635A R8222N1011 FORCED HEATING COOLING M20170A Fig. 6. Hydronic heat with V8043 zone valves and air conditioning with dampers wiring diagram.
- Page 6 W8703A DAMPER INTERFACE MODULE T8635L T8635L T8635L C7089B OUTDOOR TEMPERATURE SENSOR W8703A Zone A R8222N1011 RELAYS FOR EACH CIRCULATOR Open OPEN CLOSE Zone B Open OPEN CLOSE Zone C Open OPEN (HOT) CLOSE EXTERNAL 40 VA TRANSFORMER BOILER W8635A R8222N1011...
- Page 7 W8703A DAMPER INTERFACE MODULE T8635L T8635L T8635L C7089B OUTDOOR TEMPERATURE SENSOR W8703A Zone A R8222N1011 RELAYS FOR EACH CIRCULATOR Open OPEN CLOSE Zone B Open OPEN CLOSE Zone C Open OPEN (HOT) CLOSE EXTERNAL 40 VA TRANSFORMER BOILER W8635A R8222N1011...
- Page 8 W8703A DAMPER INTERFACE MODULE T8635L T8635L T8635L C7089B OUTDOOR TEMPERATURE SENSOR W8703A Zone A R8222N1011 RELAYS FOR EACH CIRCULATOR Open OPEN CLOSE Zone B Open OPEN CLOSE Zone C Open OPEN (HOT) CLOSE EXTERNAL 40 VA TRANSFORMER BOILER LINE W8635A...
- Page 9 W8703A DAMPER INTERFACE MODULE T8635L T8635L T8635L C7089B OUTDOOR TEMPERATURE SENSOR V8043F W8703A SWITCH TH-TR V8043F OPEN CLOSE OPEN SWITCH TH-TR CLOSE V8043F OPEN (HOT) CLOSE SWITCH EXTERNAL TH-TR 40 VA TRANSFORMER BOILER IWH AQUASTAT YELLOW YELLOW V8044 VALVE RA889A...
- Page 10 Wiring W8703 For Hot Water Zoning HYDRONIC ZONING WITH ZONE VALVES Networked Zoning can control a hydronic system using Honeywell V8043 or similar zone valves. The zone Hydronic Zone Applications valve end switches are wired in parallel and connected to the Aquastat on the boiler. A relay is used to prevent...
- Page 11 Fig. 10. This feature prevents the Aquastat from steal- ing the heat for extended periods. RELAY AND BOILER CONTROL PANELS Networked zoning can control Honeywell zone valve or ZONES 4-6 circular panels. Wire similar to Fig. 7 but wire the nor-...
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Page 12: Led Indicators
W8703A DAMPER INTERFACE MODULE LED Indicators To test for proper wiring of the W8703A and the associ- ated zone dampers: There are four LED on the W8703A used to indicate 1. Make sure that the zone thermostats are not call- damper position and system communications.