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28
CHILLER OPERATION AND MAINTENANCE
Pressure and Temperature Log
A log of temperatures and pressures should be taken
regularly. Periodically conduct a visual inspection
of the chiller to identify problems before they reach
the point of failure. As with any mechanical system,
it is necessary to conduct a series of checks to the
ClimaCool chiller to confirm correct operation.
Daily
•
A daily operational log should be kept
•
Perform visually inspection
•
Record entering and leaving chilled water and
condenser water temperatures and pressures
•
Note any problems that may exist. Immediately
plan for further investigation. If repair is necessary,
schedule for earliest possible date.
•
Properly document all data taken
Weekly
•
Review daily log from previous week
•
Perform visual inspection
•
Properly document all data taken
•
Note any problems that may exist. Immediately plan for
further investigation. If repair is necessary, schedule for
earliest possible date.
Quarterly
•
Check controller operating parameters and set points
•
Check refrigerant pressures and temperatures
•
Check compressor amps
•
Check compressor oil level
•
Check and test all safeties
•
Check water flow rates and pressure drops across
evaporator and condenser
•
Properly document all data taken
Annual
•
Isolate chiller, drain all water circuits
•
Back flush all heat exchangers (use only ClimaCool
recommended de-scalers)
•
Remove and clean all waterside strainers
•
Perform leak test on all refrigerant circuits
•
Check all interconnecting flanges for proper
tightness
•
Perform oil analysis on each compressor
•
Check and test all refrigerant safeties for proper operation
•
Check all electrical terminal connections for tightness
•
Manually operate all waterside isolation valves on each
module
•
Check all peripheral systems for proper operation
•
Check and test main controller
•
Verify set points, sensors and general configuration
•
Properly document all data taken
HEAT EXCHANGERS
Back Washing
It may become evident from the recorded daily log data that
the performance of the chiller is gradually degrading. This
could be due to a buildup of debris or sludge obstructing the
free passage of flow through the heat exchangers. This debris
can be removed by a "back washing" process, which involves
the introduction of a forced, violent, backwards flow through
the heat exchanger, using a carefully formulated flushing
solution. To be effective, this back flow should be slightly
Chiller Operation and Maintenance
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