ClimaCool UGW Manual - Manual (Page 44)

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42
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 confirm correct operation
of the chiller .
Maintaining a Daily Log
Date
Chiller No.
Technician
Sun. Mon. Tue. Wed. Thur. Fri. Sat.
Chiller Water
Entering
Temperature
Chilled Water
Leaving
Temperature
Condenser
Water Entering
Temperature
Condenser
Water Leaving
Temperature
Chilled Water
Pressure Drop
Condenser
Water Pressure
Drop
Faults: Note By
Module Number
Daily
• A daily operational log should be kept .
• Perform visual inspection .
• Record entering and leaving chiller water and
condenser water temperatures and pressures .
• Properly document all data taken .
• Note any problems that may exist and
immediately plan for further investigation . If
repair is necessary, schedule for the earliest
possible date .
Weekly
• Review daily log from previous week .
• Perform visual inspection .
• Properly document all data taken .
• Note any problems that may exist and immediately
plan for further investigation . If repair is necessary,
schedule for the earliest possible date .
Quarterly
• Check Master Control Panel operating parameters
and set points .
• Check temperature drop/rise on each individual
heat exchanger . *
• Check compressor oil level .
• Check compressor oil color .
• Check water flow rates and pressure drops across
evaporator and condenser heat exchangers .
• Properly document all data taken .
• Check all electrical connections for tightness .
* The temperature drop/rise on a fully loaded (both
compressors) heat exchanger is generally 10°F . If only one
compressor is running, the temperature drop/rise will be
approximately 5°F . Some projects are designed to have a
higher or lower temperature drop on either the evaporator
or the condenser depending on application . Consult the
bank performance sheet for specific project requirements for
these values . If the temperature drop/rise is greater than the
design, the heat exchanger may need to be back flushed or
the strainer may need to be cleaned .
Annual
• Back flush all heat exchangers. If fouling is suspected
use only ClimaCool recommended de-scalers (see page
43 – Chemical Clean In Place Washing) .
• Remove and clean all waterside strainers .
• Manually operate all waterside isolation valves,
if provided, on each module .
• Check all electrical connections for tightness .
• Perform leak check on all refrigerant circuits .
• Check all header piping couplings for tightness .
• Check oil level and color on each compressor .
• Check and test all refrigerant safeties for
proper operation .
• Check all peripheral systems for proper operation .
• Check and test CoolLogic Control System .
• Verify set points, sensors and general control
configuration.
• Properly document all data taken .