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 TM 55-1925-273-10-1
0082 00
REFRIGERATION PULL DOWN MODE OPERATION
! CAUTION
Align condenser cooling water piping system before starting the refrigeration plant, or damage to
the plant can occur.
1.
Align the condenser cooling water system by completing the following:
! CAUTION
The condenser water cooling system must be purged of all air. Air in the cooling system will
reduce heat exchange efficiency and can result in damage to the condenser.
a.
For refrigeration condenser 1:
(1)
OPEN GS-38, RETR COND No.1 SPLY (figure 18, item 10), reefer condenser 2 supply.
(2)
OPEN GS-48, WTR. RGLTR COV (figure 18, item 11), water regulator inlet.
(3)
Verify that GS-63 (figure 18, item 12), water regulator, is OPEN.
(4)
Verify that GS-82, BYP WTR RGLTR (figure 18, item 13), water regulator bypass, is CLOSED.
b.
For refrigeration condenser 2:
(1)
OPEN GS-39, RETR COND No.2 SPLY (figure 18, item 14), reefer condenser 1 supply.
(2)
OPEN GS-49, WTR RGLTR COV (figure 18, item 15), water regulator inlet.
(3)
Verify that GS-64 (figure 18, item 16), water regulator, is OPEN.
(4)
Verify that GS-71, BYP WTR RGLTR (figure 18, item 17), water regulator bypass is CLOSED.
c.
Verify that GS-32, GS OVBD DISCH (figure 18, item 9), general service overboard discharge, is OPEN.
NOTE
gizing the heater for this period of time ensures that the refrigerant is driven from the oil.
! CAUTION
When starting the condenser, avoid rapid pump-down to ensure oil is not carried off with refrig-
erant. If oil is pulled from sump, ensure that oil pressure is a minimum of 16 PSI (1.10 bar)
above suction pressure. If the pressure difference becomes greater than 16 PSI (1.10 bar), stop
the condenser and add oil temporarily. Added oil must be later removed when the sight glass oil
level becomes too high.
2.
Align condenser unit piping as follows by:
a.
OPEN the following valves:
(1)
Compressor discharge valve (figure 19, item 1)
0082 00-26
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