TM 9-4120-403-14
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 5-13.
Leave the gages on
service manifold attached.
(2)
Set TEMPerature control thermostat knob to fully INCREASE.
(3)
Place fan speed 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 +/kg/cm2) shortly after compressor starts, and then remain
constant.
(7)
If unit fails the above test, the valve must be replaced.
Figure 5-26. Fluid Pressure Regulating Valve (V2)
5-85
