Inspectair filter(s) at least once each month and replace
(throwaway-type) or clean (cleanable-type) at least twice during
each cooling season and twice during the heating season if electric
heat is installed, or whenever the filter becomes clogged with dust
and lint.
Unit Top Removal
NOTE: When performing maintenance or service procedures that
require removal of the unit top, be sure to perform all of the routine
maintenance procedures that require top removal, including coil
inspection and cleaning, and condensate drain pan inspection and
cleaning.
ELECTRICALSHOCK HAZARD
Failure to follow this warning could result in personal
injury or death,
Disconnect electrical power, and install lockout tag to the
unit before removing top.
Only qualified service personnel should perform maintenance and
service procedures that require unit top removal.
Refer to the following top removal procedures:
1. Unplug all three wires from the outdoor fan motor.
2. Remove screws on unit top cover flange. (Save all screws.)
3. Lift top from unit carefully. Set top on edge and make sure
that top is supported by unit side that is opposite duct (or
plenum) side.
4. Carefully replace and secure unit top to unit, using screws
removed in Steps 1 and 2, when maintenance and/or service
procedures are completed.
Indoor Blower and Motor
NOTE: All motors are pre-lubricated. Do not attempt to lubricate
these motors.
For longer life, operating economy, and continuing efficiency,
clean accumulated dirt and grease from the blower wheel and
motor annually.
ELECTRICALSHOCK HAZARD
Failure to follow this warning could result in personal
injury or death.
Disconnect electrical power, and install lockout tag to the
unit before cleaning and lubricating the blower motor and
wheel.
To clean the blower wheel:
1. Remove the blower housing:
a. Remove the screws on the external side of the duct
panel that fasten the housing to the duct panel assembly.
b. Remove the side access panel and unscrew the
mounting bracket that fastens the blower housing to the
internal partition panel of the control box assembly.
c. Make sure that the blower housing is supported by hand
before completely removing the mounting bracket.
d. Slide the blower housing from the rails of the duct panel
and place it outside the unit.
2. Remove the blower wheel from the housing:
a. Loosen the set screw which secures the wheel to the
motor shaft.
b. Loosen the three mounting legs of the motor by
removing the bolts that fasten the mounting legs to the
housing.
c. Slide out the motor assembly (motor, belly band and the
3 mounting legs) from the hub of the wheel.
d. Remove the filler panel at the discharge end of the
blower housing by removing the two screws that fasten
it to the housing.
e. Ensure proper reassembly by marking wheel orientation.
Remove the wheel from the housing.
3. Remove the caked on dirt from the wheel and the motor
using a brush.
4. Remove lint and dirt accumulations from the wheel and
housing with a vacuum cleaner, using a soft brush
attachment.
5. Remove grease and oil with a mild solvent.
6. Reassemble
a. Slip the wheel back in the housing with the hub set
screw parented in the correct direction.
b. Install the filler panel.
c. Reinsert the motor assembly in the wheel hub and align
the mounting legs with the housing mounting hold
locations.
d. Tighten the mounting bolts to fasten the motor assembly
with the housing.
e. Center the wheel in the housing by sliding it, align the
flat end of the shaft with the set screw and tighten the
set screw.
f. Slide back the blower housing into the mounting rails in
the duct panel and install the mounting bracket back in
its position.
g. Install the screws on the external side of the duct panel
to fasten duct panel with the housing.
h. Replace the side access panel.
15
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