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 TM 55-1925-273-10-2
0128 00
! CAUTION
Open the COMPRESSION SUCTION valve slowly to prevent rapid pumping down of the suc-
tion pressure side, which could cause oil foaming and result in pumping of oil from the compres-
sor crankcase. Damage to the compressor could result from lack of lubrication.
3.
Observe compressor operation for 5 minutes.
NOTE
Liquid refrigerant return to the compressor will be indicated by a sudden drop in suction tem-
perature and rapid fluctuation in suction pressure.
4.
If there is no evidence of liquid refrigerant return to the compressor, open the COMPRESSOR SUCTION valve (figure
1, item 3) wide.
5.
When there is evidence of liquid refrigerant return to the compressor, adjust the COMPRESSOR SUCTION valve
(figure 1, item 3) until proper suction pressure (2. 3 to 2. 4 PSI) is indicated on suction gauge.
! CAUTION
If the suction temperature and oil pressure do not stabilize or if the compressor develops a knock,
stop the compressor by placing the power disconnect switch in the OFF position and notify unit
maintenance. Continued operation could damage the compressor.
6.
After gauges have stabilized to normal operating readings, secure the other condenser.
SHUT DOWN OTHER CONDENSER
Shut down the other condenser according to the following procedure:
1.
CLOSE the DEHYDRATOR INLET valve (figure 1, item 7) at the condensing unit being secured.
! CAUTION
Serious compressor damage (and possible injury to personnel) will result if the discharge service
valve is not opened before the compressor is started.
NOTE
Allow the compressor to operate until it is shut down automatically by the suction pressure
switch.
2.
CLOSE the COMPRESSOR SUCTION valve (figure 1, item 3) of the condensing unit being secured.
3.
CLOSE the COMPRESSOR DISCHARGE valve (figure 1, item 2) of the condensing unit being secured.
ALIGN REFRIGERANT PIPING SYSTEM
OPEN RFSS-13, LIQUID LINE CRSVR CO (figure 4, item 1).
0128 00-6
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