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NetworkAIR FM DX 60 Hz Operation, Maintenance, and Troubleshooting74
Functional tests
Measure the refrigerant pressures.
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.
Head Pressure Suction Pressure
Compressor on
Compressors on