Bivalent schematic

Air Conditioning and Heat Pumps · Heat Pumps in Practice · printed page 230 (PDF page 231)

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Bivalent Heat Pump Heat Pump – Bivalent

Text in the illustration

refrigerant flow
A
cooling mode
indoor coil
blower
suction line
reversing valve
heat pump compressor
check valve
cooling capillary
fan
outdoor coil
gas burners (off)
B
heating mode
temperature above 38°F
heating capillary
C
temperature below 38°F
fan is off
gas burners (on)
= refrigerant flow

Generated explanation

The schematic shows three operating modes of a bivalent heat pump, with refrigerant flow arrows connecting an indoor coil, compressor, reversing valve, and outdoor coil. Panel A depicts cooling operation with the gas burners off and heat discharged at the outdoor coil. Panel B depicts heating above 38°F, with reversed refrigerant flow, a heating capillary, and the gas burners off. Panel C depicts heating below 38°F, with gas burners firing beneath the outdoor coil and the outdoor fan off. Check valves and capillary bypass paths control refrigerant routing, while the indoor blower moves air across the indoor coil.

Components

indoor coil indoor blower heat pump compressor reversing valve suction line refrigerant piping check valves cooling capillary heating capillary outdoor coil outdoor fan gas burners