Maintenance Procedures
50 ARTC-SVX002A-EN
Federal Clean Air Act
Responsible refrigerant practices are important to the
environment, our customers, and the air conditioning
industry. All technicians who handle refrigerants must be
properly certified. The Federal Clean Air Act prescribes
procedures for handling, reclaiming, recovering, and
recycling of refrigerants and the equipment that must be
used in maintenance procedures involving potential
leakage of HVAC refrigerants. State and local
governments may have additional requirements that must
be followed to responsibly handle HVAC refrigerants.
Inspection and Maintenance
Schedule
Proactive measures should be taken to prevent potential
problems with the chillers. These include maintaining a
operational log and conducting weekly, quarterly, and
annual inspections of the chiller.
Daily
A daily visual inspection can reveal obvious problems.
Keep notes of the chiller performance:
• Log pressures and temperatures.
• Visually inspect of the unit. Check for noises, as well
as, oil or refrigerant leaks.
NOTICE
Component Damage!
Failure to follow instructions could damage sensitive
electronic components beyond repair. To prevent arcing
or surges of electrical current, do not use wires or
cables to jump components or bypass the
manufacturer's safety systems.
Table 10. Recommended chiller service intervals
Task Frequency
Visually inspect the chiller Daily
Log pressure and temperatures Daily
Inspect touchscreen interface panel for alarm history Weekly
Clean strainers on the inlet water pipe Monthly
Check the compressor oil level sight glass Monthly
Confirm the glycol concentration Monthly
Confirm the refrigeration pressures Monthly
Check the refrigeration liquid line sight glass Monthly
Inspect refrigerant pressures and temperature set points Quarterly
Inspect superheat (10 °F to 12 °F [5°C to 6°C]) and sub-cooling temperatures
(10°F to 15°F [5°C to 8°C])
Quarterly
Inspect the evaporator entering and leaving evaporator temperature Quarterly
Collect water/glycol mixture sample for analysis Quarterly
Inspect crankcase heaters Quarterly
Inspect piping for signs of leaks Quarterly
Inspect refrigerant piping for oil or refrigerant leaks Quarterly
Observe refrigeration operating pressures Quarterly
Confirm motor amperage draw and voltage Quarterly
Confirm chiller superheat and sub-cooling Quarterly
Check for worn or burned contactors Quarterly
Inspect all electrical connections and fuses Annually
Inspect each compressor for refrigerant pressures, overheating, oil leaks Annually
Inspect compressor terminals for pitting, corrosion, and loose connections Annually
Inspect compressor oil level Annually
Confirm and record compressor amperage draw and voltage Annually
Compare water/glycol flow against design specifications Annually
Tighten compressor rotalock nuts Annually
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