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HVAC
HVAC Excellence Employment Ready Certification
Refrigeration Fundamentals - The Four Components & P-T Relationship
Knowledge Check
Refrigeration Fundamentals - The Four Components & P-T Relationship
Knowledge Check
Knowledge Check
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Why is subcooling the accepted method for verifying refrigerant charge on TXV-equipped systems?
A
High subcooling indicates the system is undercharged and needs more refrigerant
B
Subcooling always equals superheat on a properly charged TXV system
C
Subcooling of 10 to 20 F confirms refrigerant has fully condensed to liquid before the metering device, ensuring correct charge regardless of indoor or outdoor temperature conditions
D
Subcooling cannot be reliably measured in the field without laboratory equipment
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