Sterling 882.93092.01 Manual Do Utilizador

GP Series Portable Chillers

Chapter 5: Maintenance

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Caution! Do not use steam or water over 140ºF (60ºC) to clean a condenser unless you

are monitoring the refrigeration circuit for excessive pressure with gauges.

Only a trained technician should use this method.

5-4 Maintaining the Evaporator

Dirty evaporator heat exchange surfaces reduce system capacity and efficiency. Remove dirt

and slime in the evaporator by reverse-circulating with a mild detergent and water solution.
Remove mineral deposits by reverse-circulating Non-Acid De-Scaling Solution (Part No.

A0553840). Follow the directions on the container.

5-5 Evaporator Process Piping Y-Strainer

The process piping Y-strainer requires periodic cleaning of its screen to insure the proper

flow through the evaporator. To clean the strainer screen, remove the access plug and

retaining cap, and pull out the screen.
Wipe, brush, or vacuum out any dirt left in the strainer body. Clean the screen and replace it

in the strainer taking care to fit it squarely into the machined seat provided.
Caution! Do not forget to re-install the screen after cleaning it. Operating the chiller

with no strainer screen can potentially plug the evaporator with dirt. The

warranty does not cover chiller failures from a dirty evaporator.

5-6 Preventative Maintenance Service

Follow a systematic preventive maintenance program to help avoid costly down time. Call

the Service Department to arrange a schedule of inspections. This service can be tailored to

fit your maintenance requirements. These inspections include, but are not limited to:

Checking refrigerant suction and discharge pressures

Checking safety and operating conditions

Checking voltage and amperage of all motors

Checking all electrical connections

Checking quantity of refrigerant

Checking compressor oil level on units with tandem compressors

Checking lubrication of motor and pump bearings

Checking circulating pump operation

Checking flow through heat exchangers

Checking compressor efficiency

Checking noise levels