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Académie
HVAC
NATE Core & Service Certification
Refrigerant Management & Service Procedures
Vérification des connaissances
Refrigerant Management & Service Procedures
Vérification des connaissances
Vérification des connaissances
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What oil type is used with R-22 systems, and why must it not be mixed with POE oil?
A
POE oil is used with R-22 because it has lower viscosity at low temperatures
B
Mineral oil is used with R-22; mixing with POE creates an insoluble sludge that can block metering devices
C
PAG oil is used with R-22 for its compatibility with HFC refrigerants
D
Alkylbenzene oil must be used exclusively, as mineral oil causes immediate compressor seizure
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