Hitachi RAS-8FSXN - Page 36

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
Outdoor unit................................................................................................................................ 30
3.1.1 Refrigerant pipe selection............................................................................................................. 30
3.1.2 Copper pipes, sizes, connection and insulation............................................................................ 30
3.1.3 Pipe connection kit........................................................................................................................ 36
3.1.4 Precautions for the installation of the outdoor unit........................................................................ 38
3.1.5 General instructions on the installation of refrigerant pipes.......................................................... 39
3.1.6 Refrigerant pipe connection for heat pump systems (2 pipes)...................................................... 41
3.1.7 Refrigerant pipe connection for heat recovery systems (3 pipes)................................................. 49
3.1.8 Refrigerant charge........................................................................................................................ 58
3.1.9 Precautions in the event of refrigerant leaks................................................................................. 63
3.1.10 Drainage pipes.............................................................................................................................. 64
3.2 CH unit....................................................................................................................................... 66
3.2.1 Considerations.............................................................................................................................. 66
3.2.2 Piping materials............................................................................................................................. 66
3.2.3 Cautions for piping connection work............................................................................................. 66
3.2.4 Refrigerant piping work................................................................................................................. 67
3 Piping work and
refrigerant charge
29
SMGB0065 rev. 1 - 12/2010
3