The Refrigeration Circuit; Evaporator - Fisher & Paykel 635 Active Smart Service Manual

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4.4

The Refrigeration Circuit

The compressor discharges high pressure, high temperature gas into the back panel condenser circuit first,
returning via the oil cooler in the compressor and entering the side condenser in the cabinet by way of the
base tube. This tube runs from the compressor compartment forward to the front bottom edge of the
cabinet, returning down the left hand side to be connected to the left hand side condenser coil.
A loop from this condenser coil forms the cross rail mullion on dual temperature cabinets. The condenser
then continues across the top front edge of the cabinet to form the right hand side condenser entering the
filter drier, which is mounted vertically in the unit compartment.
Now the high-pressure gas has been condensed, the liquid refrigerant flows through the capillary tube
entering the evaporator mounted in the freezer compartment. The liquid refrigerant then boils off due to the
low suction pressure applied to within the evaporator from the compressor. The heat-laden vapour is drawn
back to the compressor by way of the suction line to start the cycle all over again.
The above information relates to the cabinet, not the drawing below.
4.5

Evaporator

The evaporator on R134a models is of the Fin and Tube type with the expansion and suction inlet/outlet on
the left hand side. The defrost element is fitted to the left and right hand end plates of the evaporator and
clamped into position.
SINGLE EVAPORATOR TWIN FAN SYSTEM
Diagram 4.4
Diagram 4.5.1
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