user manual

B. MAINTENANCE AND OPERATION

1. All access panels must be in place when unit is in operation.

2. For maximum efficiency, the condenser coil must be kept clean. Periodic inspections,

depending on local conditions are recommended. If it is necessary to clean the con-

denser coil, use a common garden hose.

3. Never operate the unit without filters installed in the air handler.

4. If a compressor crankcase heater is used, it must be turned on 12 hours prior to start-

ng the compressor.

1. CONTACTOR

The contactor is an electrical switch which operates the compressor and condenser

fans. Its 24 volt coil is activated either directly or indirectly by the room thermostat.

2. HIGH PRESSURE SWITCH (HPC)

Opens the contactor (24 volt) circuit on high refrigerant pressure—Manual Reset—check

for cause of tripping before putting unit back in service.

3. LOW PRESSURE SWITCH (LPC)

Acts as safety against loss of refrigerant and low evaporator temperatures.

4. PRE-START CHECK

PRE-START CHECK

1. Is condensing unit properly located and level?

2. Is air free to travel to and from condensing unit?

3. Is the wiring correct and according to the unit wiring dia-

gram?

4. Are wiring connections tight? (Including those in unit and

compressor electrical box.)

5. Is the unit properly grounded?

6. Is circulating air blower correctly wired?

7. Is condensing unit properly fused?

8. Is the thermostat level, correctly wired and in a good loca-

tion?

9. Is the ductwork correctly sized, run, taped and insulated?

10. Is refrigerant tubing neatly run and suction line thoroughly

insulated?

11. Is condensate drain line properly sized, run, trapped and

pitched?

12. Are refrigerant connections tight and leak tested?

13. Is filter clean and in place?

14. Does the condenser fan turn free without rubbing?

15. Is the fan tight on the fan shaft?

16. Are all covers and access panels in place to prevent air

loss?

17. Are refrigerant valves open for full flow?