Hitachi RAS-8FSXN - Page 75

Table 1 Connected indoor unit capacity and piping size.
Model
Connected indoor Unit
capacity (HP)
Low pressure gas pipe
(mm)
High pressure gas pipe
(mm)
Gas pipe (mm)
CH-6.0N1
0.8 ~ 1.5 ø15.88 ø12.7 ø12.7 *
1.6 ~ 4.0 ø15.88 ø12.7 ø15.88
4.1 ~ 6.0 ø19.05 ø15.88 ø15.88
CH-10.0N1
6.1 ~ 8.0 ø19.05 ø15.88 ø19.05
8.1 ~ 10.0 ø22.2 ø19.05 ø22.2
* In case that a branch is located downstream of the CH unit and also the connected indoor unit capacity is 0.8 ~ 1.5 HP,
use ø15.88 for the gas pipe.
Table 2 Piping conection size for CH unit.
Model Low pressure gas pipe (mm) High pressure gas pipe (mm) Gas pipe (mm)
CH-6.0N1 ø15.88 ø15.88 ø15.88
CH-10.0N1 ø19.05 ø19.05 ø19.05
1 2
5
6
CH
3
4
IU IU
1 Upstream.
2 Downstream.
3 Low pressure gas pipe.
4 High pressure gas pipe.
5 Multi-kit.
6 Gas pipe.
IU: Indoor unit.
CH: CH Unit.
Condition of piping work.
1
CH
CH
2
IU
IU
IU
Hb
L
Ha
a
c
b
1 Upstream.
2 Downstream.
IU: Indoor unit.
3 Piping work and
refrigerant charge
68
SMGB0065 rev. 1 - 12/2010