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 TM 55-1925-273-10-2
0128 00
! CAUTION
When starting the compressor, avoid rapid pumpdown to ensure that oil is not carried off with
refrigerant. If oil is pulled from the sump, ensure that oil pressure is a minimum of 16 PSI above
suction pressure. If pressure drops below this, stop the compressor and add oil temporarily. The
added oil must later be removed when the oil in the sight glass is too high. If this situation occurs,
refer to unit maintenance. Low oil pressure and oil level could damage compressor.
NOTE
Before starting the compressor, the crankcase heater must be energized for 24 hours. Energizing
the heater for this period of time should drive all refrigerant from the oil.
ALIGN CONDENSER UNIT PIPING
Align the condenser unit piping according to the following steps:
1.
OPEN COMPRESSOR DISCHARGE valve (figure 1, item 2). Use a refrigeration ratchet wrench.
2.
CLOSE COMPRESSOR SUCTION valve (figure 1, item 3). Use a refrigeration ratchet wrench.
3.
OPEN CONDENSER OUTLET valve (figure 1, item 4).
4.
OPEN DEHYDRATOR OUTLET valve (figure 1, item 5).
5.
CLOSE DEHYDRATOR BY-PASS valve (figure 1, item 6).
6.
OPEN DEHYDRATOR INLET valve (figure 1, item 7).
7.
OPEN RELIEF VALVE BY-PASS valve (figure 1, item 8).
8.
CLOSE PURGE valve (figure 1, item 9). Use a refrigeration ratchet wrench.
9.
CLOSE CHARGE AND DRAIN valve (figure 1, item 10).
10. OPEN WATER REGULATOR VALVE ACTUATING LINE valve (figure 1, item 11).
ALIGN REFRIGERANT PIPING SYSTEM
Align the refrigerant piping system according to the following steps:
1.
CLOSE RFSS-13, LIQUID LINE CRSVR CO (figure 4, item 1).
2.
OPEN RFSS-8, EQL LINE (figure 4, item 2) or RFSS-9, EQL LINE (figure 4, item 3).
3.
OPEN RFSS-11 (figure 4, item 4), or RFSS-12 (figure 4, item 5), TXV/ STNR/LLSV COV.
4.
OPEN RFSS-14, TXV/STNR/LLSV COV (figure 4, item 6) OR RFSS-15, TXV/ STNR/LLSV COV (figure 4, item 7).
0128 00-4
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