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 TM 55-1905-220-14-2
2-112. AIR CONDITIONING SYSTEM START-UP (Cont).
(23)
Do the following together:
(a) Press START switch (19) and,
(b) Press and hold L.P. BYPASS switch (20).
(24)
When compressor motor is running at full speed - release L.P. BYPASS switch (20). Proceed to step
(25) immediately.
Open compressor suction stop shut off valve (13) slowly.
This will prevent pumping oil out of
compressor.
(25)
Start rotating the compressor suction stop shut off valve (13) counter-clockwise.
(26)
Observe compressor suction gage (21). Normal reading should be between 80 to 100 psi
(551.6 to 689.5 kPa).
(27)
Stop rotating valve (13), when normal reading on gage (19) is reached.
2-590
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