3. P i p i n g w o r k a n d r e f r i g e r a n t c h a r g e
Index
3.1 Gas refrigerant pipe selection.................................................................................................... 78
3.1.1 Gas refrigerant pipe selection....................................................................................................... 78
3.2 Copper pipes, sizes, connection and insulation......................................................................... 79
3.2.1 Copper pipes and sizes................................................................................................................. 79
3.2.2 Pipe connection............................................................................................................................. 80
3.2.3 Insulation of multikits and/or branches.......................................................................................... 80
3.3 General instructions on the installation of gas refrigerant pipes................................................. 81
3.4 Copper gas refrigerant pipe........................................................................................................ 82
3.4.1 Three principles on work with refrigerant pipes............................................................................. 82
3.4.2 General information on copper refrigeration pipes........................................................................ 83
3.4.3 Diameters of the copper refrigeration pipes.................................................................................. 83
3.4.4 Preparing and cutting copper refrigeration pipes.......................................................................... 83
3.4.5 Bending copper pipes................................................................................................................... 85
3.4.6 Brazing copper refrigeration pipes................................................................................................ 85
3.4.7 Flared connection mounting.......................................................................................................... 87
3.4.8 Refrigerant gas pipe insulation...................................................................................................... 87
3.4.9 Refrigerant pipe suspension......................................................................................................... 88
3.5 Refrigerant and drain hose installation....................................................................................... 89
3.5.1 RCI - 4-way cassette (1.0-6.0)FSN2E........................................................................................... 89
3.5.2 RCIM-4-way cassette (compact) (1.0-2.0)FSN2........................................................................... 90
3.5.3 RCD - 2-way cassette (1.0-5.0)FSN2........................................................................................... 92
3.5.4 RPC - Ceiling type (2.0-6.0)FSN2E.............................................................................................. 93
3.5.5 RPI - Ducted indoor unit (0.8-1.5)FSN2E...................................................................................... 98
3.5.6 RPI - Ducted indoor unit (2.0-10.0)FSN2E.................................................................................... 100
3.5.7 RPIM - Ducted indoor unit (0.8-1.5)FSN2E(-DU).......................................................................... 102
3.5.8 RPK - Wall type (1.0-4.0)FSN(H)2M............................................................................................. 104
3.5.9 RPF(I)-Floor type (1.0-2.5)FSN2E................................................................................................ 107
3.6 Refrigerant gas charge............................................................................................................... 109
3.7 Precautions in the event of refrigerant gas leaks....................................................................... 110
3.7.1 Maximum permissible concentration of hydrofluorocarbon (HFC)................................................ 110
3.7.2 Calculation of the concentration of refrigerant gas........................................................................ 110
3.7.3 Countermeasures in the event of refrigerant gas leaks................................................................ 110
3 Piping work and
refrigerant charge
77
SMGB0063 rev. 1 - 10/2010
3
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