Maintenance/service
WARNING
DISCONNECT AND LOCK OUT POWER WHEN SERVICING UNIT. FAILURE TO DO SO MAY RESULT IN
PERSONAL INJURY OR DEATH DUE TO ELECTRICAL SHOCK.
CAUTION
Exercise care when working around the sharp metal edges of door panels, door frames, etc. These
edges can cause injury.
Evaporator coil
Inspect the evaporator coil at filter change intervals. Dirty or clogged evaporator coils causes
low suction pressure and lost capacity. If the coils appear dirty, they should be cleaned using a
mild detergent or an approved commercial coil cleaning agent. Do not use cleaners that contain
acids (e.g., vinegar) or ammonia as they can damage evaporator coil and lead to coil leaks due to
formicary corrosion.
Refrigerant circuit(s)
WARNING
The Air Conditioning section of this equipment is charged with R-410A; a high pressure refrigerant.
Only qualified technicians, using appropriately pressure rated test instruments, should perform
troubleshooting or service on this equipment.
With the unit operating, check and record the compressor discharge and suction pressures. The
compressor running current should also be recorded. A maintenance log of these readings can
indicate if the unit is operating within its normal limits. Abnormal readings should be investigated
and the cause corrected.
Blower
Inspect the evaporator blower at each regular service interval. Clean blower wheel as needed.
Bearings are permanently sealed ball type and do not require lubrication. Check bearings for any
signs of wear (movement between inner and outer races). Ensure bearing locking collars are secure
to the shaft and that collar locking screw is properly set. Check that the blower wheel is tight on the
shaft and that the hub set screws are properly torqued.
Drive belt
Examine belt periodically for wear. Glazed areas on the drive surfaces indicate overheating due
to belt slippage. Ideal tension is the lowest tension at which the belt will not slip under peak load
conditions. Over-tensioning shortens belt and bearing life (see section
).
C-Series Vertical (CSV) Water-Cooled Self-Contained Units, B Generation, R-410A Installation, Operation, and
Maintenance Manual
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