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Evacuation and Charging Procedure
WARNING:
• Before cutting or using a torch on
refrigerant tubes, recover the refriger
ant 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 specified.
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.
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