Bryant 542J Series, Installation, Start-Up And Service Instructions Manual

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HEAT PUMP OPERATION
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— Refrigerant Flow Direction
D
— Check Valve Flow Direction*
X — Fixed Orifice
VALVE COOLING HEATING
A Closed Open
B Open Closed
C Closed Open
D Open Closed
E Closed Open
F Open Closed
NOTES:
1. Hot gas from compressor flows through the 4-way valve and is
directed to the outdoor-coil header. At the header it is condensed
and subcooled through converging circuits (7-2-1). Refrigerant leaves
the outdoor coil by way of the check valve to the liquid line.
2. The refrigerant then flows through the filter drier and feeds the
indoor coil by way of fixed orifices on each circuit.
3. Each circuit evaporates the refrigerant, and the circuits are com-
bined in the indoor-coil header with some of the circuits flowing
through the check valve.
4. The refrigerant then flows through the 4-way valve, accumulator
and back to the compressor.
NOTES:
1. Hot gas from compressor flows through the 4-way valve and is
directed to the indoor-coil header. At the header it is condensed
and directed through subcooling circuits and out the indoor-coil
check valve to the liquid line.
2. The refrigerant then flows through a strainer and feeds the out-
door coil by way of fixed orifices on each circuit.
3. Each circuit evaporates the refrigerant, and the circuits are com-
bined in the outdoor-coil header with some of the circuits flowing
through the check valve.
4. The refrigerant then flows through the 4-way valve, accumulator
and back to the compressor.
*See Table 13 for check valve operation details
NOTE: Circuitry shown is for single system; 542J units have 2 individual and independent re-
frigeration systems that each operate in an identical manner.
Fig. 32 — Typical Heat Pump Operation
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