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Sealed System Service Overview
Evacuation and Charging Procedure
WARNING:
•
Be careful when using a torch near plastic,
mastic, and foam insulation. Use approved
safety equipment and protect these items
from damage with the heat shield kit
(part #WX5X8926), which includes the heat
shield and thermal paste. The thermal paste
is available separately (part #WX5X8927).
• Before cutting or using a torch on
refrigerant tubes, recover the refrigerant
from the system using approved recovery
equipment.
• Never recharge the system through the
high-side recovery port valve.
• 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 a charge
in some replacement parts. Contact with
these gases may cause injury.
1. Follow all standard LOTO (lock out-tag out)
and ppE (personal protection equipment)
requirements for sealed system repair.
2. Turn off the compressor. Using a WX5X328
piercing valve or equivalent, pierce the tubing
on the drier process stub.
3. Attach the r134a recovery pump to the piercing
valve and evacuate the system to a minimum
20-inch vacuum (the compressor may be used if
functioning).
4. Make the necessary sealed system repairs.
5. replace the drier with a new drier containing an
access valve.
6. Braze a permanent access valve on the
compressor process stub. (See photo.)
EEV Replacement Assembly
(Continued Next page)
7. Attach the r134a recovery pump to the drier
access valve and evacuate the system to a
minimum 20-inch vacuum (the compressor may
be used).
8. Add 1/4 of the specified refrigerant charge on
the rating plate through the compressor access
valve (low side).
9. restore power and operate the compressor for
a minimum of 2 minutes.
10. Attach the r134a recovery pump and evacuate
the system to a minimum 20-inch vacuum with
the compressor running.
11. remove the r134a pump and charge the
system with the specified refrigerant charge on
the rating plate.
12. Check the sealed system for refrigerant leaks.
13. Check appliance operation.
Electronic Expansion Valve (EEV) Replacement
The valve body and coil are heat sensitive. When
using a torch, it is recommended to remove the
EEV coil and use a heat absorbing paste such as
WX5X8927 or equivalent should the EEV require
replacement. (See
Electronic Expansion Valve (EEV)
.)
Access Valve