Mitsubishi PUHY-EP250 - Chapter 1 Piping Work; 1-1 Preparation for Piping Work; 1-2 Handling and Characteristics of Piping Materials, Refrigerant, and Refrigerant Oil; 1-3 Working with Refrigerant Piping

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HWE12050 GB
Chapter 1 Piping Work
1-1 Preparation for Piping Work ................................................................................................................ 3
1-1-1 Read before Servicing ............................................................................................................................ 3
1-1-2 Tool Preparation ..................................................................................................................................... 4
1-2 Handling and Characteristics of Piping Materials, Refrigerant, and Refrigerant Oil...................... 5
1-2-1 Piping Materials ...................................................................................................................................... 5
1-2-2 Storage of Piping Materials..................................................................................................................... 7
1-2-3 Pipe Processing ...................................................................................................................................... 7
1-2-4 Characteristics of the New and Conventional Refrigerants .................................................................... 8
1-2-5 Refrigerant Oil......................................................................................................................................... 9
1-3 Working with Refrigerant Piping ....................................................................................................... 10
1-3-1 Pipe Brazing.......................................................................................................................................... 10
1-3-2 Air Tightness Test................................................................................................................................. 11
1-3-3 Vacuum Drying ..................................................................................................................................... 12
1-3-4 Refrigerant Charging............................................................................................................................. 13