Preventive Maintenance Work Plan Chart Page 21
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35Preventive Maintenance Work Plan
Frequency Key
W – Weekly
M - Monthly Q - Quarterly
SA- Semi-Annually A- Annually SST - Seasonal Start-Up SSH - Season Shut Down
Record run times and starts per chiller.
M
Inspect for refrigerant and oil leaks. All leaks to be repaired.
SSH
Check refrigerant levels and recharge if needed.
SSH
Flush/clean chilled and condenser water piping strainers.
SSH
Record run times and starts per chiller.
SSH
Ensure proper operation of freeze protection safety devices.
SSH
Take precautionary measures to prevent damage to system from freezing during winter months
SSH
(i.e. - drain piping, utilize glycol).
Collect a sample of refrigerant/oil and submit to a qualified laboratory for analysis.
SSH
Blowdown pneumatic control lines and prepare for winter lay-up.
SSH
Clean and vacuum all electrical and control enclosures.
W
Perform meg test on chiller compressor motor and all other associated motors in the
W
chilled/condenser water system. Compare to past readings.
Inspect for refrigerant and oil leaks. All leaks to be repaired.
W
Check refrigerant levels and recharge if needed.
W
With chiller locked/tagged out, inspect and adjust the guide vane linkage and operation.
W
Lubricate all control linkages and moving parts associated with the chiller.
W
Change compressor oil as specified by manufacturer.
W
Replace main oil filter.
W
Replace refrigerant filter/drier.
W
Check operation of starter and inspect contact surfaces for wear or pitting.
W
Check overload settings and check/tighten ALL electrical connections.
W
Solid state starters/VFD's must be serviced and maintained according to unit manufacturer's
W
recommendations.
Inspect all relief valves for lubrication, condenser and evaporator sides. Disconnect piping
W
inspect valve body.
Check and calibrate all temperature sensors utilized for chiller operation (i.e., chilled water,
W
condenser water, refrigerant, oil), if possible.
Check and calibrate all differential pressure and flow switches utilized
W
for chiller operation.
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