System Contamination Cleanup; Determining Severity Of Contamination - Koolaire KDT0300A Technician's Handbook

System Contamination Cleanup

This section describes the basic requirements for restoring
contaminated systems to reliable service.
Koolaire assumes no responsibility for the use of
contaminated refrigerant. Damage resulting from
the use of contaminated refrigerant is the sole
responsibility of the servicing company.

DETERMINING SEVERITY OF CONTAMINATION

System contamination is generally caused by either
moisture or residue from compressor burnout entering the
refrigeration system.
Inspection of the refrigerant usually provides the first
indication of system contamination. Obvious moisture or
an acrid odor in the refrigerant indicates contamination.
If harmful levels of contamination are suspected, perform
the following procedure.
1. Remove the refrigerant charge from the ice machine.
2. Remove the compressor from the system.
3. Check the odor and appearance of the oil.
4. Inspect open suction and discharge lines at the
compressor for burnout deposits.
5. If no signs of contamination are present, perform
an acid oil test to determine the type of cleanup
required.
Part Number STH063 9/17



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