| Tweet |
Custom Search
|
|
|
||
 TM 55-1925-273-10-1
0082 00
8.
Start the reefer condensers as follows:
NOTE
Before starting a condenser, the crankcase heater must be energized for at least 24 hours. Ener-
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 that oil is not carried off with
refrigerant. 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.
a.
OPEN the compressor suction valves (figure 19, item 7) one full turn.
b.
Set the following switches to ON for the reefer condenser units:
(1)
Main power disconnect switches (figure 19, item 11)
(2)
Power ON/OFF switches (figure 19, item 12)
! CAUTION
Open the COMPRESSOR SUCTION Valves slowly to prevent rapid pumping down of suction
pressure side, which could cause oil foaming and result in pumping of oil from condenser crank-
case. Damage to the condensers could result from lack of lubrication.
c.
Slowly, continue to OPEN the compressor suction valves (figure 19, item 7) as suction pressure decreases.
d.
Verify that the condenser water temperature gauges remain in the normal range.
e.
Verify that the following gauges read in the normal operating range:
(1)
Liquid line temperature gauge
(2)
Suction pressure gauge
(3)
Suction temperature gauge
(4)
Discharge pressure gauge
(5)
Oil pressure gauge
! CAUTION
Oil pressure must be a minimum of 16 PSI (1.10 bar) above suction pressure, or damage to the
condensers could result from lack of lubrication.
f.
Observe the condenser operating for 5 minutes.
0082 00-22
|
||
|
||
