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                         SSC Series Central Chilling Stations 
Page 75 of 86 
9-7  Preventive Maintenance Service 
A systematic preventive maintenance program helps avoid costly 
down time. Call the Service Department at Sterling to arrange a 
schedule of inspections. This service, described in 
Sterling 
Bulletin No. 10-106.3
, is tailored to fit your maintenance 
requirements. 
 
Inspections include: 
 
þ  Check refrigerant suction and discharge pressures. 
þ  Check safety and operating controls. 
þ  Check voltage and amperage of all motors. 
þ  Check all electrical connections. 
þ  Check quantity of refrigerant. 
þ  Check compressor oil level. 
þ  Check lubrication of motor and pump bearings. 
þ  Check circulating pump operation. 
þ  Check flow through heat exchangers. 
þ  Check compressor efficiency. 
þ  Check noise levels. 
þ  Check cleanliness of equipment area.