Hitachi RAS-8FSXNS2E Installation & Operation Manual page 23

Ⓓ Header branch
Total indoor unit HP
5-8
5-10
③ Diameter of the main pipe (from the base of the unit or connection kit 1 to the first branch).
Outdoor unit (HP)
5
(6/8)
10
(12/14)
16
(18-24)
(26-34)
(36-54)
(56-66)
(68-72)
(72-88)
≥ 90

NOTE
When the maximum length of the equivalent refrigerant pipe from the piping connection kit 1 to
the indoor unit is over 100m, the pipe size of gas and liquid lines from the piping connection kit 1 to
first branch should be increased by one size with reducers (field-suppplied).
④ Pipe diameter after first branch or between Multi-Kits in the main branch.
Total indoor unit capacity after
the first branch (HP)
< 6
(6-8.99)
(9-11.99)
(12/15.99)
(16-17.99)
(18-25.99)
(26-35.99)
(36-55.99)
(56-67.99)
PMML0628 rev.0 - 05/2023
Number of header branches
4
8
Equivalent pipe length < 100 m
Gas (Ø)
15.88
19.05
22.20
25.40
28.58
28.58
31.75
38.10
44.45
44.45
50.80
50.80
Gas (Ø)
15.88
19.05
22.20
25.40
28.58
28.58
31.75
38.10
44.45
Model
MH-84AN1
MH-108AN
Liquid (Ø)
9.52
9.52
9.52
12.70
12.70
15.88
19.05
19.05
19.05
22.20
22.20
25.40
Liquid (Ø)
9.52
9.52
9.52
12.70
12.70
15.88
19.05
19.05
19.05
3
16