Mitsubishi Electric R410A Service Handbook page 10

Chapter 1 Check Before Servicing
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..................................................................................................................... 6
1-2-3 Pipe Processing ...................................................................................................................................... 6
1-2-4 Characteristics of the New and Conventional Refrigerants .................................................................... 7
1-2-5 Refrigerant Oil......................................................................................................................................... 8
1-3 Working with Refrigerant Piping ......................................................................................................... 9
1-3-1 Pipe Brazing............................................................................................................................................ 9
1-3-2 Air Tightness Test ................................................................................................................................. 10
1-3-3 Vacuum Drying ..................................................................................................................................... 11
1-3-4 Refrigerant Charging............................................................................................................................. 12
1-4 Precautions for Wiring ....................................................................................................................... 13
HWE14080 - 1 - GB