Hitachi UTOPIA R32 Series - Page 8

III
PMEN0654 rev.0 - 12/2023
II
GENERAL INDEX
5.4.2 Cung copper refrigeraon pipes ........................................................19
5.4.3 Bending copper pipes ............................................................................19
5.4.4 Brazing copper refrigerant pipes ...........................................................20
5.5 Refrigerant pipe insulaon ..............................................................................21
5.6 Suspension of Refrigerant Piping ....................................................................22
5.7 Line branch and header branch installaon ...................................................22
5.8 Piping connecon for outdoor unit .................................................................23
5.8.1 Outdoor unit stop valve ......................................................................... 25
5.8.2 Connecng are adapter .......................................................................26
6. Refrigerant piping length ..........................................................................................27
6.1 RAS-(2-3)HVRC3 ...............................................................................................28
6.1.1 Refrigerant piping length .......................................................................28
6.1.2 Piping system for header branch...........................................................28
6.1.3 Combinaons of piping size and piping length .....................................30
6.1.5 Refrigerant piping size and Mul-Kit/distributor ..................................31
7. DIP switches ..............................................................................................................32
7.1 Seng of DIP switches for outdoor unit ......................................................... 33
8. Commissioning .........................................................................................................37
8.1 Main concerns for commissioning ..................................................................38
9. Vacuum pumping ...................................................................................................... 39
9.1 Basic Method ...................................................................................................40
9.2 Triple Evacuaon Method ...............................................................................41
9.3 RAS-(2-3)HVRC3 vacuum pumping example ...................................................42
10. Charging work .........................................................................................................43
10.1 Important consideraons ................................................................................44
10.2 RAS-(2-3)HVRC3 charging work example ........................................................ 46