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www.manitowocfsusa.com 800-225-9916 20
Maintenance
Maintenance Chart
Area
Task
Frequency
Evaporator Check for proper defrosting Monthly
Clean the coil and drain pan Every 6 months
Check for proper drainage
Condenser Inspect /clean the coil if the air supply is near polluting sources
(such as cooking appliances)
Monthly
Clean the coil surface Every 3 months
General Check/tighten all electrical connections Every 6 months
Check all wiring and insulators
Check contactor for proper operation and contact point deterioration
Check all fan motors
Tighten fan set screws, and motor mount nuts and bolts
For semi-hermetics, check the oil level in the system
Check the operation of the control system
Make certain all safety controls are operating properly
Check operation of the drain line heater and examine for cuts and
abrasions
Check/tighten all mechanical/flare connections
CAUTION
Failure to keep the condenser coil clean will result in reduced airflow through the
condenser, resulting in poor system performance and premature compressor failure.
Polyol Ester (POE) Lubricants:
Polyol Ester (POE) lubricants quickly absorb moisture from the ambient surroundings.
POE lubricants absorb moisture more rapidly and in greater quantity than conventional
mineral oils. Because moisture levels greater than 100 PPM will result in system
corrosion and component failure, it is essential that system exposure to ambient
conditions be kept to a minimum.
If a system is left open to the atmosphere for more than 15 minutes, the liquid line drier
and compressor oil must be replaced. Drain at least 95% of the oil from the compressor
suction port. Measure the amount of removed oil, and replace it with exactly the same
amount of new POE oil.
Mobil EAL™ ARCTIC 22 CC is the preferred Polyol Ester lubricant because of its
particular additives. ICI Emkarate RL 32S is an acceptable alternative when the Mobil
is not available. These POE lubricants must be used with HFC refrigerants. Lubricants
are packaged in specially designed, sealed containers. Once opened, use the lubricant
immediately. Properly dispose of any unused lubricant.
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