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HVAC
HVAC Excellence Professional Level Technician
Refrigerant Management - R-410A Charging, Recovery & Leak Detection
Knowledge Check
Refrigerant Management - R-410A Charging, Recovery & Leak Detection
Knowledge Check
Knowledge Check
1 / 15
When charging an R-410A system with a TXV using the subcooling method, the technician should:
A
Add refrigerant until the suction line frosts at the compressor inlet
B
Add refrigerant by weight only using the nameplate charge specification
C
Add refrigerant until suction pressure reaches the target saturation pressure for the indoor wet-bulb temperature
D
Measure liquid line temperature and subtract the condenser saturation temperature - add refrigerant until subcooling reaches the manufacturer's target (typically 10 to 15 degrees F)
Check Answer
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