AUTOMATIC OPPOSED BLADE DAMPERS (AOBD)
68-0246
10
CHECKOUT
After installing and wiring the dampers, turn on the power
supply and check out the system. To check out the forced air
system, see the system specifications.
CAUTION
Equipment Damage Hazard.
Shorting can damage thermostat heat anticipator.
Avoid shorting across system control terminals when
checking system operation.
IMPORTANT
To ensure accurate temperature control, do not
touch or breathe on the thermostat bimetal or ther-
mometer.
Determining Damper Position (See Fig. 15)
1.
Observe that damper is open when the crank arm points
toward the damper.
2.
Observe that damper is closed when the crank arm
points away from the damper.
Fig. 15. Determining damper position.
THE DAMPER IS OPEN WHEN THE CRANK ARM
POINTS TOWARD THE DAMPER.
THE DAMPER IS CLOSED WHEN THE CRANK ARM
POINTS AWAY FROM THE DAMPER.
1
1
REMOVE ACTUATOR COVER TO VIEW CRANK ARM POSITION.
1
M2281
