Subject to change without prior notice Revised 07-12
6 720 220 345
7. Route an 18 AWG size wire from the “VP”
connection on the damper actuator motor to the
white wire lead out of the wall controller and
connect using a wire nut.
8. Recheck all connections at the air handler,
actuator motor, and the wall mounted controller
to ensure they have all been tightened and the
wiring is secure.
Caution
Ensure all applicable electrical codes are
followed in wiring the fresh air duct system.
ConTrollIng The ouTSIDe AIr
DAmper
Controlling the outside air damper is achieved by
adjusting the knob on the wall mounted controller.
The percentage of outside air that the homeowner
will want will vary based on size of the home,
activities going on within the home (i.e. dancing,
cooking), and number of people.
The wall mounted controller has lines of 10%
increments marked on the plate. Simply turn the
knob to the appropriate amount of outside air. If the
percentage of air is adjusted for a short time
duration due to activities or possibly by smoke being
created by burning food, ensure that the controller is
returned to the initial setting once the situation is
back to “normal”.
Leaving the damper wide open when it is not needed
can lead to IAQ issues by introducing humid air or
dry air (depending on your geographical location
and time of year) and can unnecessarily strain the
HVAC system leading to discomfort and long run
times of the HVAC system.
The wiring as described above however will ensure
that the damper is closed when the HVAC fan motor
is not energized. Fresh air should only be introduced
if the fan is running.
homeoWner ConSIDerATIonS
Some considerations that the homeowner should
take when using and controlling the fresh air duct
system:
1. The introduction of fresh outside air will
increase the rate at which the air fi lter will
become loaded with debris and other
6 IAQ Series
Controlling the outside Air Damper
figure #2
