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Page Title: 6-20. TUBING AND FITTINGS
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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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