Based on the latest industry standards; must the oil be changed in a hermetic compressor on a close-coupled reach-in unit when retrofitting R12 with R401A?
a. Yes, you must always change from mineral oil to alkylbenzene on a retrofit.
b. No, because it has been found that the oil will actually return to the compressor.
c. It depends on what refrigerant you are using to retrofit the unit.
b. No, because it has been found that the oil will actually return to the compressor.
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