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 TM 55-1925-273-10-1
0067 00
REFRIGERATION
Start Up:
1.
Ensure crankcase heater has been energized at least twenty-four (24) hours prior to start up.
2.
Line-up valves for pulldown or holding mode as indicated in valve line-up and indicator table. Line-up Gen-
eral Service System and supply SW to the condenser.
3.
Apply power to unit coolers in chill box and freeze room.
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.
6.
Monitor compressor operation for above 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 compressor,
throttle suction valve until proper suction is obtained.
7.
Change over from pulldown to holding mode, secure one unit in accordance with securing instructions and
open interconnecting valves RFSS-13 and RFSS-20.
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, (110V), must be left on to keep heater energized.
Placard 24. Refrigeration
0067 00-32
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