AUTOMATIC OPPOSED BLADE DAMPERS (AOBD)
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.
THE DAMPER IS OPEN WHEN THE CRANK ARM
POINTS TOWARD THE DAMPER.
68-0246
IMPORTANT
Determining Damper Position (See Fig. 15)
1. Observe that damper is open when the crank arm points
2. Observe that damper is closed when the crank arm
1
1 REMOVE ACTUATOR COVER TO VIEW CRANK ARM POSITION.
Fig. 15. Determining damper position.
10
To ensure accurate temperature control, do not
touch or breathe on the thermostat bimetal or ther-
mometer.
toward the damper.
points away from the damper.
THE DAMPER IS CLOSED WHEN THE CRANK ARM
POINTS AWAY FROM THE DAMPER.
1
M2281
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