10
803877 Rev. 00
Automatic Powered Damper
Some units may be provided with an automatic
powered fresh air damper that opens the fresh air door
to bring outdoor air into the room whenever the indoor
fan is running on high speed. If the indoor fan shuts
off, the damper automatically closes. The factory
default is fresh air with high speed fan operation only,
but it can be changed to open with low speed fan
operation only by having qualified service personnel
re-wire the unit as shown on the specific wiring
diagram affixed to the unit.
WARNING:
The conversion procedure involves
exposure to high voltage electrical circuits in the
control box in order to make the necessary change to
the damper action tied to motor speed, and must be
performed by qualified service personnel. Failure to do
so could result in property damage, personal injury or
death. Disconnect electric power to the unit before
servicing.
