7
Models 340/341/342
Introduction
140113
Running Specifications
Expansion Valve Setting
R404A
340- 12: 35 - 36 PSI (241 - 248 kPa.)
340- 27, 341 & 342: 35 - 36 PSI (241 - 248 kPa.)
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_ 240 - 270
(1,655 - 1,862 kPa.)
80_ 26.7_ 270 - 300
(1,862 - 2,069 kPa.)
90_ 32.2_ 300 - 340
(2,069 - 2,344 kPa.)
100_ 37.8_ 340 - 380
(2,344 - 2,620 kPa.)
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