Maintenance Procedures
56 ARTC-SVX005A-EN
Inspection and Maintenance
Schedule
Proactive measures should be taken to prevent potential
problems with the chiller/heaters. These include
maintaining a operational log and conducting weekly,
quarterly, and annual inspections of the chiller/heater. See
below table.
Daily
A daily visual inspection can reveal obvious problems.
Keep notes of the chiller/heater performance:
• Log pressures and temperatures.
• Visually inspect the unit.
• Inspect touchscreen display for alarms.
• Inspect modules for obvious leaks
• Listen for any atypical noises or vibrations.
Federal Clean Air Act
Important: 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.
NOTICE
Compressor 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 13. Recommended chiller/heater service intervals
Task Frequency
Visually inspect the chiller/heater Daily
Log pressure and temperatures Daily
Inspect touchscreen interface panel for alarm history Daily
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 and observe proper operation Quarterly
Inspect water 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/heater 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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