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TM5-4120-387-14
(11) Install top panel. (See para 4-23.)
(12) Evacuate and charge the refrigeration system. (See para 5-10 and
5-11.)
5-25. FLUID PRESSURE REGULATING VALVE (V2)
a.
Test
NOTE
Valves are factory set and sealed to start opening when
suction pressure decreases to 58 psig. Do not break seal.
(1) Perform a refrigeration pressure check on unit in accordance with
paragraph 5-12. Leave the
(2) Set Temperature
(3) Place fan speed
gages on service manifold attached.
control thermostat knob to fully INCREASE.
switch in HI SPEED.
(4) Start unit in COOL mode.
(5) Observe pressure gages.
(6) Suction pressure should drop to 58 ±2 psi (4.0 ±0.14 kg/cm2) shortly
after compressor starts, and then remain constant.
(7) If unit fails the above test, the valve must be replaced.
(8) Turn unit OFF.
b.
Removal
Preliminary procedures: 1.
Discharge the refrigerant per paragraph 5-6.
2.
Remove top panel. (See para 4-23.)
5-65
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