155
RETURN-AIR FILTERS — Access to these filters is through
the door marked FILTER SECTION. Filters in upper and low-
er bag filter tracks can only be removed from the right side of
the unit.
Adjustments
RETURN FAN MOTOR PLATE — Adjust using a wrench
on the adjusting bolts:
1. Loosen holddown bolts. (See Fig. 51).
2. Turn the adjusting bolts to move the motor mounting
plate toward or away from the fan to loosen or tighten the
belts. Make the same number of turns to each bolt.
3. Retighten holddown bolts.
FLAME
SENSOR
IGNITION
MODULATING
GAS VALVE
GAS
VALVE
ROLLOUT
SWITCH
Fig. 48 — Modulating Gas Burner Assembly
SENSOR DETAILS
IGNITION DETAILS
Fig. 49 — Sensor and Ignition Position
A48-8708
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