CAPILLARY TUBE
1. Discharge and recover the
refrigerant completely.
2. Unbraze the capillary tube on
both ends.
3. Replacement is the reverse of
these steps.
SEALED SYSTEM REPAIR NOTES
1. Use caution when working with the sealed system. Refrigerant must be
discharged and recovered; it may not be vented into the atmosphere.
2. Wear eye protection. If refrigerant is released and it contacts the eye, the
surface of the eye will freeze instantly and the damage cannot be repaired.
The result is permanent blindness.
3. If there is no service valve, one must be installed before work is performed.
Use a piercing type valve to recover the refrigerant. Then unbraze and
remove the pinch-off tube. Replace the tube with a service valve and
leave the valve in the system when the work is completed.
4. Be very careful when moving parts of the sealed system (condenser,
evaporator, and piping) to avoid crimping the tubing or damaging the
soldered joints.
5. If you are using high vacuum equipment, simply crack valves A and B for
a few minutes at the beginning, then open the valves two full turns. This
keeps the compressor oil from foaming and being drawn into the vacuum
pump. (See next page.)
TOOLS REQUIRED FOR SERVICE
• Vacuum pump
• Brazing equipment
• Leak detector
• Tubing cutter
• Service valve (remains in place)
LWHD1006R
• Charging cylinder
• Manifold gauge set
• Pinch-off tool capable of
making a vapor-proof seal
• Various hand tools
Page 24 of 40
Training Manual