62-12259 8–44
8.8.8.4 Expansion Valve and Strainer Replacement
1. Pump down the low side. Refer to Section 8.6.2.
2. Remove coil and unbraze valve. Clean all tube stubs so new valve fits on easily.
3. Verify the strainer is in place.
4. Use a wet rag to keep the replacement valve cool and braze in place.
5. Leak check and evacuate the low side. Refer to Section 8.6.6 and Section 8.6.7.
NOTE
The strainer for the ECXV is located in the tube above the LIV connection, refer to Figure 8.22.
8.8.9 Liquid Injection Solenoid Valve
8.8.9.1 Coil Replacement
NOTE
The coil may be replaced without removing the refrigerant.
1.
Ensure the unit will not start automatically by placing the START/RUN-OFF switch in the OFF position and
removing the negative battery cable.
Disconnect the high voltage source and lockout/tagout the receptacle.
2. Disconnect coil connector.
3. Remove locking nut, upper O-ring, threaded collar coil and lower O-ring (See Figure 8.28).
4. Verify coil type, voltage and frequency of old and new coil. This information appears on the coil housing.
5. Ensure upper and lower O-rings are installed on top and bottom of coil and tighten locking nut to 1.2 to 1.4
Nm (10 to 18 inch-pounds).
8.8.9.2 Repairing the Valve
1. Pump down the low side. Refer to Section 8.6.2.
2. Remove the armature tube, taking care the armature and spring do not drop out.
3. Ensure the spring is properly seated in the armature and install into the armature tube.
4. Install a new internal O-ring into the valve body and then reinstall the enclosing tube with armature and
spring.
8.8.9.3 Valve Replacement
1. To replace a valve, pump down the low side. Refer to Section 8.6.2.
2. Ensure the unit will not start automatically by placing the START/RUN-OFF switch in the OFF position and
removing the negative battery cable. Disconnect the high voltage source and lockout/tagout the receptacle.
3. Remove coil, refer to “Coil Replacement” above.
4. Unbraze valve from unit and braze new valve in place. Wrap valve in wet rag and point flame away from
valve during brazing operation.
5. Install coil, refer to “Coil Replacement” above. Leak check, evacuate the unit and charge in accordance with
Section 8.6.
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