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Maintenance Procedures
Maintenance Strategy
The primary goal of preventive maintenance is to avoid the
consequences of failure of equipment. This may be by
preventing the failure before it actually occurs which
preventive maintenance helps to achieve. It is designed to
preserve and restore equipment reliability by replacing
worn components before they actually fail. In addition,
operators can record equipment operating conditions,
temperatures, and pressures so they know to replace, or
repair worn parts before they cause chiller failure. The ideal
maintenance program predicts and prevents unnecessary
and costly repairs and chiller down time. Trane chillers are
designed for ease of access with a premium placed on
locating key components to facilitate visual inspection and
hands-on verification.
Maintenance for HVAC equipment and facilities can include
a preventive maintenance checklist which includes small
checks which can significantly extend service life.
Power Disconnect Handle
Packaged TACW units are equipped with a panel-mounted
disconnect handle installed on the outside of the power
distribution panel. The disconnect handle must be turned to
the off position before the panel can be opened for service.
When the panel door is open, power can be reconnected
by turning the handle located on the inside of the panel to
the ON position.
WARNING
PPE for Arc/Flash Required!
Failure to wear appropriate PPE could result in death
or serious injury.
On this unit, if the handle shield is cracked the circuit
breaker could arc/flash when reset. To avoid being
injured, technicians MUST put on all necessary
Personal Protective Equipment (PPE), in accordance
with NFPA70E for arc/flash protection, PRIOR to
entering the starter panel cabinet.
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.
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
70
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 an
operational log and conducting weekly, quarterly, and
annual inspections of the chiller.
Inspection Methods
Appropriate inspection for modern chillers can be
described as hands on. Where possible and appropriate,
visual inspection should include touching the component or
apparatus being inspection. The sense of touch provides
additional feedback regarding temperature, texture,
tightness, and dryness that eyes only inspection cannot
match. Habitually touching each item to be inspected also
ensures that items are not subconsciously skipped during
the inspection process.
Maintenance Checklist
Spring - Major Inspection
•
Cleaning condenser tubes using the appropriate
equipment designed for tube punching.
•
Connect to the compressors using the proper software
and perform routine maintenance checks.
•
Remove panels from compressors and physically
check electrical components for wear and tear.
•
Inspect all electrical panels and components for wear
and tear.
•
Check and verify all safeties.
•
Calibrate Temperature sensors.
•
Perform proper leak check on chillers and tag.
•
Check operation of automatic valves on chiller.
•
Extract logs from chiller and clean SD card (if data
logging is enabled).
Spring - Minor Inspection
•
Check physical condition of chiller e.g. insulation,
compressors, valves, sensors, etc. for damage.
•
Check for excessive vibration caused from external
sources.
•
Insure all electrical connections are secure.
•
Verify operation of IGVs.
•
Verify operation of EXVs.
•
Verify operation of level sensors (if chiller has one).
ARTC-SVX014A-EN
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