Blower Motor & Wheel; Lubrication; Blower Assembly Removal And Replacement; Motor Replacement - Rheem RH1V2417STANJA Installation Instructions Manual

48
13.4 BLOWER MOTOR AND WHEEL
Inspect the blower motor and wheel for cleanliness. With the system air filter in place, it
should be several years before it would become necessary to clean the blower motor
and wheel.
• If it becomes necessary to remove the blower assembly from the unit, see instruc-
tions on removal and disassembly of motor, blower and heater parts.
• The blower motor and wheel may be cleaned by using a vacuum with a soft brush
attachment. Remove grease with a mild solvent such as hot water and detergent. Be
careful not to disturb the balance weights (clips) on the blower wheel blades. Do not
drop or bend wheel as balance will be affected.

13.5 LUBRICATION

The blower motor sleeve bearings are pre-lubricated by the motor manufacturer and do
not have oiling ports. Motor should be run for an indefinite period of time without addi-
tional lubrication.

13.6 BLOWER ASSEMBLY REMOVAL AND REPLACEMENT

Removing the blower assembly is not required for normal service and maintenance.
Removal is necessary for replacement of components such as motor, blower wheel.
After extended use, removal of the blower assembly may become necessary for a thor-
ough cleaning of the blower motor and wheel.
WARNING
If removal of the blower assembly is required, all disconnect switches supply-
ing power to the airhandler must be de-energized and locked (if not in sight of
unit) so the field power wires can be safely removed from the blower assem-
bly. Failure to do so can cause electrical shock resulting in personal injury or
death.
• Mark field power supply wiring (for replacement) attached to terminal block or circuit
breaker(s) on blower assembly. Remove wiring from terminal block or circuit break-
er(s).
• Mark low voltage control wiring (for replacement) where attached to unit control termi-
nals on left side of blower housing.
• Remove a screw holding blower assembly to front channel of cabinet and pull blower
assembly from cabinet.
• To replace blower assembly, slide blower assembly into blower deck. Make sure
blower assembly engages lances in deck properly. If assembly hangs up, check to
make sure top and bottom are lined up in proper locations.
• Slide blower assembly to back of cabinet and make sure it is completely engaged.
• Replace two screws holding blower assembly to front channel of cabinet. Take care
not to strip screws, just snug into place.
• Replace low voltage control wiring with wire nuts and make sure wiring is to wiring
diagram and a good connection has been made.
• Replace field power wiring to terminal block or circuit breaker(s) on control area of
blower assembly. Make sure wires are replaced as they were, check wiring diagram if
necessary. Tighten supply power wiring securely to terminals lugs.
• Make sure wiring is within cabinet and will not interfere with access door. Make sure
proper separation between low voltage control wiring and field power wiring has been
maintained.
• Replace blower assembly control access panel before energizing equipment.

13.7 MOTOR REPLACEMENT

With the blower assembly removed, the indoor blower motor can be removed and
replaced using the following procedure:
• Remove motor leads from the motor high and low voltage plugs. Note the lead loca-
tions for ease of re-assembly.
• Loosen the set screw holding the blower wheel onto the motor shaft. The shaft
extends through the blower hub so that a wrench can be used on the extended shaft
to break the shaft loose if necessary. Be careful not to damage the shaft. Use a
wheel puller on the groove in the hub if necessary.