Heatcraft Refrigeration Products H-IM-72A - Manual (Page 33)

33
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 vari-
ables in the actual equipment
application, operating conditions, and
environment recommended service
intervals may vary.