VoSKILL Academy
HVAC Technician

The Refrigerant Cycle

How an air conditioner moves heat from inside the house to outside

Inside the house 75°F Outside 90°F Evaporator indoor coil room heat cool vapor out Compressor the pump: squeezes vapor, raises pressure Condenser outdoor coil heat dumped hot vapor in Metering device the pinch: drops pressure, liquid flashes cold High side: hot, high pressure Low side: cold, low pressure suction 235 psig head 652 psig
Low sideHigh sideR-410A
235psig
Suction pressure
652psig
Head pressure
40°F
Evaporator boiling temp
115°F
Condensing temp
50°F
Suction line temp (10° superheat)
105°F
Liquid line temp (10° subcooling)

walks through all four stages, 8 seconds each
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