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FIGURE 47
To Remove Blower:
Turn off line voltage power.
1 Disconnect thermostat wiring con-
nections.
2 Disconnect blower leads from control
board and secondary limit wires.
3 Disconnect secondary limit wire
plug.
4. Loosen screws (2) and remove con-
trol box from unit. Holes are slotted so
screws do not need to be removed.
5. Remove screws (2) and remove
blower from unit.
G51MP BLOWER REMOVAL
4
2
3
1
3
VI−MAINTENANCE
WARNING
ELECTRICAL SHOCK, FIRE,
OR EXPLOSION HAZARD.
Failure to follow safety warnings exactly could result
in dangerous operation, serious injury, death or prop-
erty damage.
Improper servicing could result in dangerous opera-
tion, serious injury, death, or property damage.
Before servicing, disconnect all electrical power to
furnace.
When servicing controls, label all wires prior to dis-
connecting. Take care to reconnect wires correctly.
Verify proper operation after servicing.
At the beginning of each heating season, system should be
checked as follows by a qualified service technician:
Blower
Check the blower wheel for debris and clean if necessary.
The blower motors are prelubricated for extended bearing
life. No further lubrication is needed.
WARNING
The blower access panel must be securely in place
when the blower and burners are operating. Gas
fumes, which could contain carbon monoxide, can be
drawn into living space resulting in personal injury or
death.
Filters
Filters should be inspected monthly. Clean or replace the
filters when necessary to ensure proper furnace operation.
Replacement filters must be rated for high velocity airflow.
Table 23 lists recommended filter sizes.
TABLE 23
Furnace
Filter Size
Cabinet Size
Side Return Bottom Return
17−1/2" 16 X 25 X 1 (1) 16 X 25 X 1 (1)
21" 16 X 25 X 1 (1) 20 X 25 X 1 (1)
24−1/2" 16 X 25 X 1 (2) 24 X 25 X 1 (1)
Exhaust and air intake pipes
Check the exhaust and air intake pipes and all connections
for tightness and to make sure there is no blockage.
Electrical
1 − Check all wiring for loose connections.
2 − Check for the correct voltage at the furnace (furnace
operating).
3 − Check amp−draw on the blower motor.
Motor Nameplate__________Actual__________
Winterizing and Condensate Trap Care
1 − Turn off power to the unit.
2 − Have a shallow pan ready to empty condensate water.
3 − Remove the drain plug from the condensate trap and
empty water. Inspect the trap then reinstall the drain
plug.
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