Carrier 50WQ - Manual (Page 11)

Indoor Fan Wheel should»be centered in housing.
To adjust fan, loosen setscrew holding fan to motor
shaft. Adjust fan and retighten setscrew.
INDOOR BLOWER ASSEMBLY REMOVAL
1. Remove fan section access panel, Fig. 1.
2. Remove power wires from Molex plug. Fig. 5.
3. Place a spacer beneath blower housing for
support.
4. Remove blower assembly mounting bracket.
(Rear flange on top of blower housing and spacer
now hold blower assembly in place.)
5. Support blower housing at bottom and remove
spacer. Tilt blower assembly downward and lift
out of unit.
Indoor Fan and Motor Removal
1. Remove blower assembly from unit.
2. Remove Molex plug from bracket on fan
housing.
3. Loosen setscrew holding fan to motor shaft.
4. Loosen motor mounting band and remove
motor.
5. Remove fan cdtoff plate from blower housing
outlet.
6. Remove fan wheel from blower housing outlet.
Clean Indoor Fan Wheel — When coil is cleaned,
remove caked-on dirt from fan wheel and housing
with brush; remove grease with mild solvent. When
replacing blower assembly, make sure fan wheel is
centered in housing.
Return Air Filter — Replace throwaway filter 4
times a year. For other types of filters, refer to filter
manufacturer’s instructions as required.
CAUTION: Never operate unit without a filter
as coil will plug and damage to fan motor may
result.
Heat Exchanger — If excessive discharge pressure
is experienced with normal water flow, the heat
exchanger tubes may be fouled and require cleaning.
Contact a local water treatment firm for details on
chemical cleaning.
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