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The vent damper must be located in the vent so that it
serves only the appliance for which it is intended.
If improperly installed, a hazardous condition, such as
an explosion or carbon monoxide poisoning, could
result. Make certain that it is mounted in an accessible
location at least 6 inches from any combustible mate-
rial or the heat exchanger, and that the position
indicator is in a visible location.
The vent damper must be installed after the appliance
drafthood, as close to the drafthood as practicable,
and without modification of the drafthood.
On vertical vents, the vent damper may be mounted
with the actuator in any position. On horizontal vents,
do not mount the actuator either directly above or
directly below the vent pipe; mount the vent damper
actuator to the side of the vent.
The vent damper is set up for a continuous pilot sys-
tem. If the vent damper is installed on an Intermittent
Pilot or Direct Spark Ignition equipped system, the
energy savings of the vent damper can be improved
by plugging the hole in the vent damper blade using
the knockout plug, Part No. 105612R, provided in the
parts envelope.
DO NOT plug the hole if installing the vent damper on
a continuous pilot system as this will create a hazard.
Fig. 17: Vent Damper Installation (Model 133 Drafthood
Shown)
(# Do not use thermally actuated vent
dampers on a modulating boiler. To do so may result
in asphyxiation. Use only a mechanically actuated
vent damper device that is electrically interlocked
with the modulating boiler operation.
HORIZONTAL INSTALLATION
TO BOILER
D80B TO CHIMNEY
NO
N
O
YES
Y
ES
VERTICAL
INSTALLATION
TO CHIMNEY
V
ENT DAMPER
TO BOILER
INSTALL VENT DAMPER
WITH ACTUATOR TO
SIDES OF VENT ONLY.
D
O NOT MOUNT ABOVE
O
R BELOW VENT.
F
LOW >
ACTUATOR MAY BE
INSTALLED IN ANY
POSITION ON VERTICAL
PIPE
????? ?????? ??????? ?????????? ?? ??? ?? ???????? ?????????? ?? ???? ?????
D80B
N. O.
N. C.
END
SWITCH
C.
1K2
1K1
R
1K3
1
2
3
4
5
1R
BLACK
ORANGE RED
YELLOW BLUE
THERMOSTAT OR
CONTROLLER
LIMIT
OPTIONAL LIMIT
LOCATION
TRANSFORMER
DUAL VALVE
COMBINATION
GAS CONTROL OR
IGNITION SYSTEM
1
1
L1
L2
(HOT)
POWER SUPPLY PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED
Fig. 18: Horizontal/Vertical Vent Damper Installation
Fig. 19: Vent Damper General Wiring Diagram