GE PSH23PGR Series, Technical Service Manual

Page: 17 / 62

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Evacuation and Charging Procedure
WARNING:
• Before cutting or using a torch on
refrigerant tubes, recover the refrigerant
from the system using approved recovery
equipment.
• Never charge new refrigerant through the
purge valve. This valve is always located
on the high pressure side of the system.
• Never apply heat from any source to a
container of refrigerant. Such action will
cause excessive pressure in the container.
• Always wear goggles when working with
refrigerants and nitrogen holding charge
in some replacement parts. Contact with
these gases may cause injury.
1. Attach the hose from the R-134a charging
cylinder to the process tube port on the
compressor.
2. Evacuate the system to a minimum 20-in.
vacuum using the refrigerator compressor and
recovery pump, which is attached to the new
drier assembly.
3. Turn off the recovery pump. Close the ball
valve on the hose connected to the high-side
port connection. Add 3 ounces of R-134a
refrigerant to the system. Let the refrigerator
operate and circulate the refrigerant for 5
minutes.
4. Open the ball valve. Recover the purge/
sweep charge using the recovery pump and
the refrigerator compressor until a 20-in.
vacuum is attained. Close the ball valve and
remove the recovery hose.
5. Charge the system with the exact amount of
R-134a refrigerant specifi ed.
6. Disconnect the power cord to the refrigerator.
This allows the pressure to equalize. After
3 to 5 minutes, the low side pressure will be
positive and then the hose-to-charging port
can be disconnected.
7. Using an electronic leak detector, check
all brazed joints and both schrader ports.
Reinstall caps to schrader.