Carrier Compressors Service Guide

should be thoroughly cleaned or replaced before connecting toreplacement compressor.4. Install new liquid line filter-drier. If the system has a suction linefilter-drier, replace the core.5. Evacuate and dehydrate replacement compressor. Ensure oil incompressor is at the proper level.NOTE: Since most new and service compressors are now shippedwithout oil in the crankcase, you must check to see if there is oil.Adding or charging oil is usually easier prior to installing thecompressor.• If there is no oil, add the appropriate oil for the service. Oilcharges are listed in Sections 3.1 to 3.3, pages 62-67.• If there is oil, determine if it is compatible with the refrigerant.If the oil is not compatible, use the drain connection to removethe oil. Dispose of the removed oil following the appropriateenvironmental guidelines. Since the compressor has not beenrun, a thorough draining is all that is needed to remain withinthe limits of residual oil levels. There is no need to “flush” thecompressor with the replacement oil. Once the oil is removed,add the appropriate oil (see above).6. Place compressor in operation. After 2 to 4 hours of operation,inspect compressor oil for discoloration and/or acidity. If oil showssigns of contamination, replace oil and filter-driers and clean thesuction strainer.NOTE: When testing for moisture and acidity be sure the test kitused is appropriate for the refrigerant (CFC, HCFC, or HFC) andthe oil (mineral, alkylbenzene, or POE) in the system. Carrier’sTotal Test Kit is accurate for CFC and HCFC air-conditioningapplications. If used with POE oils, Total Test Kit will indicateacid, but is not an accurate indicator of moisture.7. Inspect oil daily for discoloration and acidity. If oil stays clean andacid-free, the system is clean. If oil shows signs of contamination,change oil, change filter-drier, and clean suction strainer. If filterdrieror suction strainer is dirty or discolored, repeat this step untilsystem is cleaned.43