Air Filter; Unit Top Removal (Condenser Coil Side); Evaporator Blower And Motor; Condenser Coil, Evaporator Coil, And Condensate Drain Pan - Payne PA1Z Installation, Start-Up And Service Instructions Manual

Table 7 — Accessory Electric Heat Pressure Drop
(in. wg)
HEATER
kW
600 800
5-20 0.06 0.08
HEATER
kW
1600 1800
5-20 0.18 0.20
The minimum maintenance requirements for this equipment
are as follows:
1. Inspect air filter(s) each month. Clean or replace when
necessary.
2. Inspect indoor coil, outdoor coil, drain pan, and conden-
sate drain each cooling season for cleanliness. Clean
when necessary.
3. Inspect blower motor and wheel for cleanliness each cool-
ing season. Clean when necessary. For first heating sea-
son, inspect blower wheel bimonthly to determine proper
cleaning frequency.
4. Check electrical connections for tightness and controls
for proper operation each cooling season. Service when
necessary.
5. Check the drain channel in the top cover periodically
for blockage (leaves, insects). Clean as needed.
WARNING: Failure to follow these warnings could
result in serious personal injury:
1. Turn off electrical power to the unit before perform-
ing any maintenance or service on the unit.
2. Use extreme caution when removing panels and parts.
As with any mechanical equipment, personal injury
can result from sharp edges.
3. Never place anything combustible either on, or in con-
tact with, the unit.
I. AIR FILTER
CAUTION: Never operate the unit without a suit-
able air filter in the return-air duct system. Always
replace the filter with the same dimensional size and
type as originally installed. See Table 1 for recom-
mended filter sizes.
Inspect air filter(s) at least once each month and replace
(throwaway-type) or clean (cleanable-type) at least twice dur-
ing each cooling season or whenever the filters become clogged
with dust and lint.
Replace filters with the same dimensional size and type as
originally provided, when necessary.
II. UNIT TOP REMOVAL (CONDENSER-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 conden-
sate drain pan inspection and cleaning.
WARNING: Disconnect and tag electrical power to the
unit before removing top. Failure to adhere to this warn-
ing could cause personal injury or death.
CFM
1000 1200 1400
0.10 0.13 0.15
CFM
2000 2200
0.23 0.25
Only qualified service personnel should perform mainte-
nance and service procedures that require unit top removal.
Refer to the following top removal procedures:
1. Remove 7 screws on unit top cover surface. (Save all
screws.)
2. Remove 2 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 serv-
ice procedures are completed.
III. EVAPORATOR BLOWER AND MOTOR
For longer life, operating economy, and continuing efficiency,
clean accumulated dirt and grease from the blower wheel and
motor annually.
WARNING: Disconnect and tag electrical power to the
unit before cleaning the blower wheel. Failure to
adhere to this warning could cause personal injury or
death.
To clean the blower wheel:
1. Access the blower assembly as follows:
a. Remove top access panel.
b. Remove 3 screws that hold blower orifice ring to blower
housing. Save screws.
c. Loosen setscrew(s) which secure wheel to motor shaft.
2. Remove and clean blower wheel as follows:
a. Lift wheel from housing. When handling and/or clean-
ing blower wheel, be sure not to disturb balance weights
(clips) on blower wheel vanes.
b. Remove caked-on dirt from wheel and housing with
a brush. Remove lint and/or dirt accumulations from
wheel and housing with vacuum cleaner, using a soft
brush attachment. Remove grease and oil with a mild
solvent.
c. Reassemble blower into housing. Place upper orifice
ring on blower to judge location of the blower wheel.
Blower wheel should be approximately 0.2-in. below
bottom of orifice ring when centered correctly. Be sure
setscrews are tightened on motor and are not on round
part of shaft.
d. Set upper orifice ring in place with 3 screws removed
in Step 1.
e. Replace top access panel.
IV. CONDENSER COIL, EVAPORATOR COIL, AND CONDEN-
SATE DRAIN PAN
Inspect the condenser coil, evaporator coil, and condensate
drain pan at least once each year. Proper inspection and clean-
ing requires the removal of the unit top. See Unit Top
Removal section on this page.
The coils are easily cleaned when dry; therefore, inspect and
clean the coils either before or after each cooling season.
Remove all obstructions (including weeds and shrubs) that
interfere with the airflow through the condenser 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
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