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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 speci
fi
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.
