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WIRING
All electrical work and materials used in the vent damper installation shall
be in accordance with local electrical codes. In the absence of codes,
consult the National Electrical Code.
To avoid damage to the room thermostat heat anticipator turn off the
electrical power supply to the appliance before proceeding with the wiring.
CAUTION: Electronic Thermostats
Problems can occur with the use of some electronic thermostats. Some
electronic thermostats rob power through the thermostat circuit to maintain
the thermostat programming. For these types of installations an isolation
relay is recommended. This will eliminate possible erratic cycling of the
damper, the thermostat or the appliance controls.
install a non-power stealing type of thermostat. (See Figure 8)
PROBLEM/SOLUTION GUIDE
CAUTION:
When servicing controls, all wires must be labeled prior to
disconnection. Wiring errors can cause improper and dangerous operation. Do
not turn damper open manually or motor damage will result and Void the
Warranty, use the service switch.
DO NOT CUT PLUG OFF OF DAMPER MOTOR ASSEMBLY OR WARRANTY WILL BE VOID.
WARNING: Do not negate the action of any existing safety or operational controls
N
S
O
O
ORMAL
EQUENCE
F
PERATION
24VAC
Power On
POWER
4&1
All Times
4&2
Calling for Heat
4&3
During Combustion
Another option is to
Damper Position
Open or Closed
Open or Opening
Damper Open
Page 9
Figure 8
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