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 TM 55-1925-273-10-1
0067 00
AIR CONDITIONING PLANT
Start Up:
1.
Ensure crankcase heater has been energized at least twenty-four (24) hours prior to start-up.
2.
Line-up valves for normal or single unit mode as indicated in valve line-up and indicators table. Line-up
General Service System and supply SW to the condenser.
3.
Apply power to fan coil unit R1-25-2 and R01-32-2.
4.
Open compressor suction valve approximately one full turn.
5.
Start compressor by placing main disconnect switch in the ON position. Immediately continue to open com-
pressor suction valve, open slowly to prevent rapid pumping down. Observe suction pressure to maintain
greater than 5 in Hg.
6.
Monitor compressor operation for about five (5) minutes, if there is no sign of liquid refrigerant returning to
the compressor, open suction valve wide, if there is evidence of liquid refrigerant returning to the compressor,
throttle suction valve until proper suction is obtained.
7.
Change over from normal to single unit mode secure one unit in accordance with securing instructions and
open interconnecting valves RFAC-39 and RFAC-41.
8.
Change over from single unit to normal mode shut interconnecting valves RFAC-39 and RFAC-41 arc' start
another unit in accordance with start-up instructions.
Securing:
1.
Close dehydrator inlet valve. Let compressor run until it cuts out on suction pressure switch.
2.
TURN-OFF main disconnect switch.
3.
Close compressor suction valve.
Note: Control power, (110 V), must be left on to keep heater energized.
Placard 22. Air Conditioning Plant
0067 00-30
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