American Power Conversion DX, FM manual Functional tests, Measure the refrigerant pressures

Functional tests

Measure the refrigerant pressures.

Head Pressure Suction Pressure

Compressor on

Compressors on

Check the operation of the thermal expansion valve. Verify superheat and sub-cooling of the System in full cool mode:

•Superheat ________________

•Sub-cooling ______________

Check the operation of the head pressure switch:

•Cut-out PSI (kPa)_____________

Verify the operation of the water/glycol regulating valves.

Check the operation of the smoke, fire, and water detected alarms (if applicable).

Confirm the operation of the fluid cooler or air cooled condenser and the flooded head pressure controls, if used.

Confirm the operation of the Redundant Group and change over capabilities.

74 NetworkAIR FM DX 60 Hz Operation, Maintenance, and Troubleshooting