Service manual

Water Cooled Refrigeration
The compressor concentrates the heat from ice
making into high pressure, hot discharge gas. The
high pressure forces the gas to the water cooled
condenser.
At the condenser, refrigerant gas and water flow
through connected parallel tubes, but in opposite
directions. Heat moves from the hotter discharge
gas to the cooler water, and the refrigerant
condenses into a liquid. The water flows out of the
condenser warmed up to about 110oF. Water flow
is controlled by a water regulating valve on the inlet
of the condenser's water circuit.
From the condenser the high pressure liquid
refrigerant flows through the liquid line to the
metering device - a thermostatic expansion valve.
At the expansion valve, liquid refrigerant passes
from a high pressure zone to one of relatively low
pressure, and in the low pressure zone it
evaporates.
The low pressure zone where the refrigerant
evaporates is the evaporator. The evaporator is a
vertical metal tube surrounded by a coil of tubing,
where the refrigerant flows through. When the
refrigerant evaporates in the coil, it absorbs heat
from the metal parts of the evaporator and the
water inside it. As the auger inside the evaporator
turns, ice is continuously forced out of the
evaporator and make up water flows in.
From the evaporator, the refrigerant, carrying the
heat from ice making, flows back to the compressor
through the suction line, and the cycle continues.
September 2009
Page 25
N0422, F0522, N0622, F0822, N0922, F1222, N1322, F1522
Air, Water or Remote Service Manual
Refrigeration Schematic
Water Cooled
Condenser
Compressor
Discharge
Line
Liquid Line
Thermostatic
Expansion
Valve
Suction Line
Evaporator