Refrigerant Piping And Refrigerant Charge - Hitachi UTOPIA R32 Series Installation And Operation Manual

Refrigerant piping and refrigerant charge

5.1 Selection of the copper pipes .........................................................................14
5.2 Three principles on work with refrigerant pipes.............................................14
5.3 Flared pipes .....................................................................................................15
5.3.1 Selection of the connection with flare fitting .......................................15
5.3.2 Dimensions of flared pipe .....................................................................16
5.3.3 Flared connection mounting .................................................................16
5.4 General instructions on the installation of refrigerant pipes .........................17
5.4.1 Preparing copper refrigeration pipes ....................................................17
5.4.2 Cutting copper refrigeration pipes ........................................................19
5.4.3 Bending copper pipes ............................................................................19
5.4.4 Brazing copper refrigerant pipes ...........................................................20
5.5 Refrigerant pipe insulation ..............................................................................21
5.6 Suspension of Refrigerant Piping ....................................................................22
5.7 Line branch and header branch installation ...................................................22
5.8 Piping connection for outdoor unit .................................................................23
5.8.1 Outdoor unit stop valve .........................................................................25
5.8.2 Connecting flare adapter .......................................................................26
PMEN0654 rev.0 - 12/2023
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