Payne PA3Z Installation Manual page 20

If oil is detected or if low cooling performance is suspected, leak-test all refrigerant tubing using an electronic leak-detector, or liquid-soap solution.
If a refrigerant leak is detected, refer to Check for Refrigerant Leaks section. (See Table of Contents for page number.)
If no refrigerant leaks are found and low cooling performance is suspected, refer to Refrigerant Charge. (See Table of Contents for page number.)
PROCEDURE 8—INDOOR AIRFLOW
The cooling airflow does not require checking unless improper performance is suspected. If a problem exists, be sure that all supply- and return-air
grilles are open and free from obstructions, and that the air filter is clean. When necessary, refer to Indoor Airflow and Airflow Adjustments
section to check the system airflow.
PROCEDURE 9—METERING DEVICES
Refrigerant cooling metering device is an Accurator (024-042) or TXV (048 and 060) located upstream of the indoor coil distributor assembly.
Refrigerant heating mode metering device is an Accurater located upstrem of the outdoor coil distributor assembly.
PROCEDURE 10—LUBRICATION
COMPRESSOR—The compressor is charged with the correct amount of oil at the factory.
FAN MOTOR BEARINGS—Fan motor bearings are permanently lubricated. No further lubrication of outdoor or indoor fan motors is required.
PROCEDURE 11—LIQUID LINE STRAINER
The liquid line strainer (to protect metering device) is made of wire mesh and is located in the liquid line on the inlet side of the metering device.
Check valves are also located in the liquid lines near the strainers. The Strainers are the larger of the two components.
PROCEDURE 12—HIGH FLOW VALVES
Located on the compressor hot gas and suction tubes are High Flow Valves. Large black plastic caps distinguish these valves with O-rings located
inside the caps. These valves cannot be accessed for service in the field. Ensure the plastic caps are in place and tight or the possibility of refrigerant
leakage could occur.
Use the Troubleshooting Cooling guide if problems occur with these units.
Use the Start-Up checklist to ensure proper start-up procedures are followed.
3.125 in.
Fig. 12—Outdoor-Fan Adjustment (024–048 Size)
Fig. 13—Outdoor-Fan Adjustment (060 Size)
TROUBLESHOOTING
START-UP CHECKLIST
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0.708in.
C00021
C02017