Service manual

Ice Maker Service Manual
Publication Number: 630460082SER - 11 - © 2004-2014, Cornelius Inc.
TEMPERATURE / PRESSURE CHART*
NOTE: *The thermostatic expansion valve is non-adjustable on all models
CONDENSER MODULATING VALVE
The reason for using a water modulating valve is to supply the correct amount of water to the condenser to maintain
the proper operating pressure in the refrigeration system high side. The flow of water through the valve is increased
as the high side pressure rises and decreases as high side pressure lowers.
Figure 3. Adjustment Screw
To calibrate the amount of water flow with the refrigeration system
high side pressure, turn adjustment screw located
on end of the valve opposite the bellows (see Figure 3). Turn adjustment screw counterclockwise to raise opening
point. Opening point of valve should be set to maintain proper
operating pressure in refrigeration system high side.
Refer to TEMPERATURE/PRESSURE CHART. Closing point of valve should be set low enough to close valve during
compressor stand by periods.
NOTE: Cold water will absorb more he
at faster than warm water. The water flow will therefore auto-
matically increase as inlet temperature increases.
REFRIGERANT
TYPE R404A
± 10 lb Discharge Pressure
Water Temperature(°F)
Air Tempeature(°F)
40 65 90
50 174 177 180
60 202 205 208
70 230 233 236
80 265 269 272
90 300 304 307
100 328 334 340
(Water Cooled Only)