Manitowoc

System Contamination CleanupGENERALThis section describes the basic requirements forrestoring contaminated systems to reliable service.ImportantManitowoc Ice assumes no responsibility for theuse of contaminated refrige rant. Damag eresulting from the use of contaminated refrigerantis the sole responsibility of the servicing company.DETERMINING SEVERITY OF CONTAMINATIONSystem contamination is generally caused by eithermoisture or residue from compressor burnout enteringthe refrigeration system.Inspection of the refrigerant usually provides the firstindication of system contamination. Obvious moistureor an acrid odor in the refrigerant indicatescontamination.If either condition is found, or if contamination issuspected, use a Total Test Kit from Totaline or asimilar diagnostic tool. These devices samplerefrigerant, eliminating the need to take an oil sample.Follow the manufacturer’s directions.If a refrigerant test kit indicates harmful levels ofcontamination, or if a test kit is not available, inspectthe compressor oil.1. Remove the refrigerant charge from the icemachine.2. Remove the compressor from the system.3. Check the odor and appearance of the oil.4. Inspect open suction and discharge lines at thecompressor for burnout deposits.5. If no signs of contamination are present, performan acid oil test to determine the type of cleanuprequired.190 Part Number 80-01111-9 7/10