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Crankcase heater -> minimises flooded starts

Затрудняет "flooded starts"

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Flooded starts usually are the result of off-cycle refrigerant migration. In other words, while the compressor is off, the refrigerant vapor migrates to the compressor crankcase, where it condenses into a liquid and is absorbed by the oil. The longer the compressor is off, the more time refrigerant vapor has to migrate.
On start-up there is a reduction in crankcase pressure; the refrigerant explodes out of the oil, possibly carrying oil with it out of the crankcase.
During this flooded start, refrigerant exploding from the oil may wash the oil from the lubricated surfaces, such as bearings, journals, and rods. The diluted oil cannot properly lubricate the surfaces. This can be verified during a compressor teardown, where erratic wear or seizure damage will be visible.