SC Air Conditioning Practice Questions - South Carolina Air Conditioning Contractor Examination Exam

A hermetic scroll compressor on a comfort-cooling unit is most likely to be damaged by liquid floodback because:

Liquid refrigerant washes oil off the bearings and is incompressible in the scroll wraps Liquid refrigerant increases oil viscosity so the motor overheats immediately Scrolls are designed to pump only liquid Floodback raises superheat above 40°F

Correct Answer:

Liquid refrigerant washes oil off the bearings and is incompressible in the scroll wraps

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