SC Refrigeration Practice Questions - South Carolina Refrigeration Contractor Examination Exam

A crankcase heater is energized during the off cycle in order to:

Boil refrigerant out of the oil so a cold start does not foam the oil and damage bearings Provide the only source of defrost heat Increase subcooling in the liquid line Keep the TXV bulb above saturation at all times

Correct Answer:

Boil refrigerant out of the oil so a cold start does not foam the oil and damage bearings

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