3 Piping work and refrigerant charge
Refrigerant piping range
SMGB0136 rev.0 - 07/2021
55
3
3 indoor units system
(mm)
Outdoor Unit HP
Pipe Size (A)
Header Branch
Gas Liquid
4 / 5 / 6 Ø15.88 Ø9.52 MH-84AN1
(mm)
Indoor unit capacity
Pipe Size (B, C, D)
Gas Liquid
≤ 1.5 HP Ø12.70 Ø6.35
1.8/2.0HP Ø15.88 Ø6.35
≥ 2.3 HP Ø15.88 Ø9.52
Connections including Indoor Units 8 and 10 HP are not possible
4 indoor units system
(mm)
Outdoor Unit HP
Pipe Size (A)
Branch pipe
Gas Liquid
4 / 5 / 6 Ø15.88 Ø9.52 E-102SN4
(mm)
Total Indoor Unit capacity after
branch pipe 1+2 or 3+4
Pipe Size (B, C)
Branch line
Indoor Unit
capacity
Pipe Size (D, E, F, G)
Gas Liquid Gas Liquid
≤ 1.5 HP Ø12.70 Ø6.35 E-102SN4 ≤ 1.5 HP Ø12.70 Ø6.35
from 1.8 to 2.0 HP Ø15.88 Ø6.35 E-102SN4 1.8/2.0HP Ø15.88 Ø6.35
≥ 2.3 HP Ø15.88 Ø9.52 E-102SN4 ≥ 2.3 HP Ø15.88 Ø9.52
? NOTE
Recomended capacity ratio for 4 indoor units system:
Capacity indoor unit 1+2 / Capacity 1+2+3+4 < 60%
Capacity indoor unit 3+4 / Capacity 1+2+3+4 < 60%
If the capacity ratio of branch of indoor units 1 and 2 is bigger than 60% of total capacity of the system or capacity ratio of branch of indoor
units 3 and 4 is bigger than 60 % of total capacity of the system, please contact with your Hitachi Dealer or Hitachi Customer Service
Department.
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