Fig. 19 — typical heat pump operation – Carrier 50EQ User Manual

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Hot gas from compressor flows thru the 4-way valve and is

directed to the outdoor coil header At the header it is condensed
and subcooled thru converging circuits (4-2-1) Refrigerant

leaves the outdoor coil by way of the check valve to the liquid
line

The refrigerant then flows thru the filter-drier and feeds the

indoor coil by way of capillary tubes on each circuit

Each circuit evaporates the refrigerant and the circuits are
combined in the indoor coil header with some of the circuits
flowing thru the check valve

The refrigerant then flows thru the 4-way valve accumulator
and back to the compressor

Hot gas from compressor flows thru the 4-way valve and is

directed to the indoor coil header At the header it is condensed
and directed thru subcooling circuits and out the indoor coil
check valve to the liquid line
The refrigerant then feeds the outdoor coil by way of a strainer
and then thru capillary tubes on each circuit

3. Each circuit evaporates the refrigerant and the circuits are

combined in the outdoor header with some of the circuits

flowing thru the check valve

4 The refrigerant then flows thru the 4-way valve, accumulator

and back to the compressor

NOTE: Refrigeration circuitry for cooling and heating cycle is shown for single system: 50EQ, with 2 individual and independent
refrigeration systems operates in identical fashion

Fig. 19 — Typical Heat Pump Operation