Hitachi RASC-4HNPE Service Manual page 55

3 Piping work and refrigerant charge
Refrigerant piping range
4 indoor units system
• Case a)
(mm)
Pipe Size (A)
RASC
unit
Gas Liquid
4 HP Ø15.88 Ø9.52
(5/6) HP Ø15.88 Ø9.52
8 HP
Ø25.4 Ø9.52 (*)
10 HP Ø25.4 Ø12.7
(*): In case that pipe length (A+B+(C or D) or A+C+(F or G))
exceeds 70m in 8 HP, please use a Ø12.7 pipe as a liquid
pipe.
The dimensions for TRE and TW multi-kits are different. Refer
to the Indoor units' Technical Catalogue in order to check the
dimensions.
Indoor unit
capacity
Gas
(0.8-1.5) HP Ø12.7
(1.8/2.0) HP Ø15.88
≥ 2.3HP Ø9.52
Connections including 8.0HP or 10.0HP indoor units are not
possible.
• Case b)
(mm)
Pipe Size (A)
RASC unit
Gas
8 HP Ø25.4
10 HP Ø25.4
(*): In case that pipe length (A+B or A+C or A+D or A+E) exceeds 70m
in 8 HP, please use a Ø12.7 pipe as a liquid pipe.
45 SMGB0091 rev.2 - 11/2015
Multi-kit

TE option TW option
TE-04N1 TW-52AN
TE-56N1 TW-52AN
TE-08N TW-102AN
TE-10N TW-102AN
(mm)
Pipe Size (D,E,F,G)
Liquid
Ø6.35
Ø6.35
Ø6.35
Multi-kit
Liquid
Ø9.52 (*)
QE-812N1
Ø12.7
?
N O T E
If the capacity ratio between IU group 1+2 and 3+4
is higher than 60/40%, install a line branch system or
contact with your Hitachi dealer.
(mm)
Total indoor Pipe Size (B,C)
unit capacity
after first
Gas Liquid
branch
(1+2) or (3+4)
(0.8-1.5) HP Ø12.7 Ø6.35
(1.8/2.0) HP Ø15.88 Ø6.35
≥ 2.3 HP
Ø15.88 Ø9.52
Indoor unit
capacity
(0.8-1.5) HP
(1.8/2.0) HP
≥ 2.3HP
Connections including 8.0HP or 10.0HP indoor units
are not possible.
Multi-kit

TE option TW option
TE-03N1 TW-22AN
TE-03N1 TW-52AN
<4HP: TE-03N1
=4HP: TE-04N1 TW-52AN
≥5HP: TE-56N1
(mm)
Pipe Size (B,C,D,E)
Gas Liquid
Ø12.7 Ø6.35
Ø15.88 Ø6.35
Ø15.88 Ø9.52
3