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b) Vent damper is factory shipped having approximately ¾” diameter hole in the vent damper blade, which must be
left open for boilers equipped with standing pilot, and should be plugged on boilers with an intermittent pilot,
using the plug supplied with the damper.
Mount the vent damper on the flue collar without modification to either and secure with sheet metal screws.
Make sure screws do not interfere with damper blade operation. Vent damper blade position indicator must be
visible to users.
c) The damper wire harness is shipped loose. One end of the harness is provided with a quick connect fitting and
the other end of the harness is provided with a connector nut. Attach the end with the connector nut to the top
jacket panel using one of the 1/2” knockouts and plug the polarized connectors together. At the vent damper,
plug the loose end of the harness into the damper and attach the quick connector to the bracket on the vent
damper motor.
d) Install vent connector pipe and vent fittings from vent damper outlet to chimney or gas vent. Secure with sheet
metal screws and support as required.
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Figure 17: Vent Damper Installation Details
Figure 16: Blocked Vent Switch Installation Details