Parallel Compressor Systems
General Maintenance Schedule
(Service/Maintenance should be performed only by a qualified / certified refrigeration service technician.)
Weekly
•Check refrigerant charge using the liquid line sight glass
•Check compressor oil level
•Check compressor crankcase heater operation
•Check main power and control voltage
•Check appearance of area around the unit
•Check system pressures
Monthly
•Check the refrigerant system for leaks
•Check suction filters and liquid line filter driers.
•Check all flanged connection bolts, fittings and line clamps for tightness.
•Inspect condenser fan blades and motor mounts for cracks, loose set screws or mounting bolts.
•Tighten all electrical connections.
•Check operation and condition of contacts on compressor/ fan motor contactors. Check appearance of control panel interior.
•Check appearance of exterior conduit/junction boxes.
•Check appearance of insulation.
•Check operation of auxiliary equipment.
Quarterly
With unit in stable operation, record all operating conditions:
•Suction/discharge/liquid refrigerant pressure(s) and temperature(s).
•System superheat, liquid subcooling, ambient temperature.
•Compressor amperage.
•Test all operating and safety controls.
Annually
•Obtain oil sample for analysis. Change oil if required.
•Clean condenser coil.
•Straighten condenser fins as required.
•Change liquid line filter drier and suction filter cores.
Note: The above information is provided only as a general guideline to aid servicing personnel and equipment owners in maintaining equipment. Due to variables in the actual equipment application, operating conditions, and environment recommended service intervals may vary.
Parallel Compressor Systems Installation & Operations Manual, October 2004 | 33 |
