5
Models 60 & 62
Introduction
Running Specifications
Expansion Valve (AXV) Setting
31-33 (213.7 - 227.54 kPa) for most products.
Low Side Pressure
Low side pressure = expansion valve setting.
To adjust the low side pressure, place the gauge on the
low side suction port at the compressor. With the
compressor running, turn the adjustment knob of the
automatic expansion valve clockwise to raise low side
pressure and counterclockwise to lower pressure.
High Side Pressure
Air Cooled: The following chart indicates normal
operating head pressures at various ambient
temperatures:
Ambient Temperature
Normal
Operating Head
Pressures
F. C.
PSI
70_ 21.1_
270-300
(1,862 - 2,069 kPa)
80_ 26.7_
300-330
(2,069 - 2,275 kPa)
90_ 32.2_
330-360
(2,275 - 2,482 kPa)
100_ 37.8_
360-400
(2,482 - 2,758 kPa)
Water Cooled: Recommended head pressure is 255
PSI (1,758 kPa).
E.P.R. Valve Setting
The product temperature in the mix hopper is
maintained by the main refrigeration system and can
be adjusted by the E.P.R. valve. The E.P.R. valve is
factory set at 20 - 22 PSI (137.9 - 151.7 kPa) in order
to maintain hopper product temperature at
approximately 40_F. ( 4 _C.). To adjust the hopper
temperature, place the gauge on the access port at the
inlet of the E.P.R. valve. With the compressor running,
loosen the locking nut and turn the adjustment screw
(located on the top of the valve) clockwise to raise the
pressure for higher hopper temperatures and
counterclockwise to decrease the pressure for lower
temperatures. When the adjustment is complete,
tighten the locking nut.
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