Unit Top Removal (Outdoor-Coil Side); Indoor Blower And Motor; Outdoor Coil, Indoor Coil, And Condensate Drain Pan - Payne PA3Z Installation Manual

Replace filters with the same dimensional size and type as originally provided, when necessary.
PROCEDURE 2—UNIT TOP REMOVAL (OUTDOOR-COIL SIDE)
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.
WARNING: ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury or death.
Disconnect and tag electrical power 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. Remove screws on unit top cover surface. (Save all screws.)
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.
PROCEDURE 3—INDOOR BLOWER AND MOTOR
For longer life, operating economy, and continuing efficiency, clean accumulated dirt and grease from the blower wheel and motor annually.
WARNING: ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury or death.
Disconnect and tag electrical power to the unit before cleaning the blower wheel.
To clean the blower wheel follow the following steps:
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 fo 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 themounting 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. Remove the wheel form 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.
PROCEDURE 4—OUTDOOR COIL, INDOOR COIL, AND CONDENSATE DRAIN PAN
Inspect the outdoor coil, indoor coil, and condensate drain pan at least once heating and cooling season. Proper inspection and cleaning requires
the removal of the unit top. See Unit Top Removal section.
Remove all obstructions (including weeds and shrubs) that interfere with the airflow through the outdoor coil. Straighten bent fins with a fin comb.
If coated with dirt or lint, clean the coils with a vacuum cleaner, using a soft brush attachment. Be careful not to bend the fins. If coated with oil
or grease, clean the coils with a mild detergent-and-water-solution. Rinse coils with clear water, using a garden hose. Be careful not to splash water
on motors, insulation, wiring or air filter(s). For best results, spray outdoor-coil fins from inside to outside the unit. On units with an outer and
inner outdoor coil, be sure to clean between the coils. Be sure to flush all dirt and debris from the unit base.
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