 Specifications Sales Brochure
The Refrigeration Cycle
As the box temperature rises, the room
thermostat (A) energizes the liquid line solenoid valve
(B). This allows refrigerant to enter the evaporator,
build up pressure, cause the low pressure control (C)
to energize the compressor contactor and start the compressor.
The compressor's hot discharge gas is piped out to the
condenser through the de-energized 3-Way valve (D). The
hot refrigerant gas is condensed by the cooler ambient
air from the condenser fan. The liquid then flows to the
receiver through the opened check valve (E) and on through
the coiled liquid line within the suction accumulator
(this performs the function as a suction to liquid heat-exchanger).
The subcooled liquid then flows through the liquid line
solenoid valve (energized/open) and on to the TXV (F)
(Thermostatic expansion valve).
The
refrigerant is then directed through the distributor at
a lower pressure and flows into the evaporator. Refrigerant
is prevented to flow past the closed checkvalve (G).
The
refrigerant liquid / vapour mixture is then boiled by
the warmer box air from the evaporator fan. The refrigerant
vapour then flows though a crankcase pressure regulator
(H) preventing a motor overload from high suction pressures
and enters the two suction accumulators and on to the
compressor.
The
cycle continues until the room temperature is satisfied.
This de-energizes the liquid line solenoid, initiating
a pumpdown cycle that reduces the suction pressure to
the cut-out setting on the low pressure control which
de-energizes the compressor.
To
view the Defrost Cycle, Click on the button below
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