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ARMY TM 9-4210-381-14
NAVY EE-000-CA-MMA-010/7053-AC
AIR FORCE TO 35E9-136-31
6-20. TUBING AND FITTINGS
This task covers:
Inspection
Removal
Installation
INITIAL SETUP:
Tools:
Tool kit, service, refrigeration unit (Item 1, Appendix B)
Personnel: 1
Equipment Conditions:
WARNING
Disconnect input power to the air conditioner before performing any internal maintenance. Voltages used
can KILL. Shutting the unit off at the control panel does not disconnect unit power.
1.
Disconnect air conditioner input power at source.
2.
Remove covers and panels as necessary to have access to repair area.
NOTE
The refrigeration system contains a number of pieces of copper tubing in a variety of material grades,
sizes, lengths, and shapes, and a number of elbows, tees, and adapters in several sizes.
INSPECTION
Check tubing and fittings for signs of leakage. Leak test if leak is suspected (para 5-15).
REMOVAL
1.
Discharge refrigerant system (para 5-12).
2.
Purge refrigerant system (para 5-13).
3.
Debraze (para 5-14) the tube connections.
4.
Remove part.
INSTALLATION
1.
Place replacement part on tube end.
2.
Purge refrigerant system (para 5-13).
3.
Braze replacement part (para 5-14).
4.
Replace drier filter cartridge (para 5-26).
5.
Clean filter strainer (para 5-26).
6.
Leak test (para 5-15) all newly connected joints and those in the repair area.
FOLLOW ON PROCEDURE
1.
Evacuate refrigerant system (para 5-16).
2.
Connect air conditioner input power at source.
3.
Charge refrigerant system (para 5-17).
4.
Install all covers and panels that were removed.
6-32
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