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 TM 55-1905-223-24-18-1
CAUTION
Make sure the oil level in the compressor is at
the half-way point in the observation window
before evacuating.
Start and run the vacuum pump.
(4)
Slowly open the suction side gauge manifold handwheel.
(5)
NOTE
Evacuation of system may be a slow process.
Evacuate system until a minimum 18 inches of vacuum (Hg) is indicated on
(6)
vacuum pump gage.
Turn off refrigeration vacuum pump.
(7)
NOTE
Observe vacuum reading for approximately 15
minutes to ensure sweat joints are good and system
is capable of holding a charge.
If system does not hold vacuum check all hose line fittings tight and if
(8)
necessary, resweat fittings previously made.
NOTE
When vacuum reading is maintained for 15 minutes
system is ready to be charge.
Remove refrigeration vacuum pump from middle hose line.
(9)
Attach discharge (high pressure) gauge manifold hose line to the discharge
(10)
service valve connection.
Slowly open discharge service valve.
(11)
Remove tags and turn on power to cabinet.
(12)
Run compressor for 5 minutes.
(13)
Observe sight glass for no bubbles and gauge manifold system operating
(14)
pressures of 23-44 psig for suction side and 120-135 psig for discharge
(high pressure) side.
If additional refrigerant charge is required, refer to paragraph 2-69
(15)
charging procedures.
Remove gauge manifold hose line connections and install protective caps on
(16)
service valve stems.
Install condenser unit and base in cabinet, refer to paragraph 2-69.
(17)
2-340
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