Hitachi RAS-2-HVNP Service Manual page 82

3. Piping work and refrigerant charge
3 indoor units system
(1) In case that pipe length (A+B or A+C or A+D) exceeds 70m in 8 HP, please use a
4 indoor units system
Pipe Size (A)
Outdoor
Unit HP
Gas Liquid
4 / 5 / 6 Ø15.88 Ø9.52
8 Ø25.40 Ø9.52
10 Ø25.40 Ø12.70
Total Indoor Unit capacity
after branch pipe
1+2 or 3+4
≤ 1.5 HP
from 1.8 to 2.0 HP
≥ 2.3 HP
If the capacity ratio between IU group 1+2 and 3+4 is higher than 60/40% please install a line branch system or contact with your Hitachi
Dealer
68
Outdoor Unit HP
4 / 5 / 6
8
10 /12
Indoor Unit capacity
≤ 1.5 HP
1.8 / 2.0 HP
> 2.3 HP
2
1
1 2
(mm)
Multi-kit (1)
IVX Premium Series
TW-52AN
(1) TW-102AN
TW-102AN
(mm)
Pipe Size
IVX Premium
(B,C)
Series
Gas Liquid
Ø12.70 Ø6.35
TW-22AN
Ø15.88 Ø6.35
TW-52AN
Ø15.88 Ø9.52
TW-52AN
SMGB0079 rev.0 - 01/2013
(mm)
Pipe Size (A) IVX Premium Series
Gas Liquid
Ø15.88 Ø9.52
Ø25.40 Ø9.52
Ø25.40 Ø12.70
Ø
12.7 pipe as a liquid pipe.
(mm)
Pipe Size (B, C, D)
Gas Liquid
Ø12.70 Ø6.35
Ø15.88 Ø6.35
Ø15.88 Ø9.52
3 4
(1) In case that total pipe length (A+B+D or A+B+E or
IVX Standard Series
A+C+F or A+C+G) exceeds of 70m in 8 HP unit, please
use a Ø12.7 pipe as a liquid pipe.
4HP: TE-04N1
5/6HP: TE-56N1
(2) When is used Multi-kit model QE-812N1 it is not
necesary the multi.kit 2.
TE-08N
QE-812N1
(2)
TE-10N
QE-812N1
(2)
Multikit 
IVX Standard
Series
TE-03N1
TE-03N1
<4: TE-03N1
=4HP: TE-04N1
≥ 5HP: TE-56N1
Multi-kit
IVX Standard Series
TG-53AN TRE-46N1
TG-103AN TRE-812N1
TG-103AN TRE-812N1
N O T E
F G
Pipe Size (D,E,F,G)
Indoor Unit
capacity
Gas
≤ 1.5 HP
Ø12.70
1.8/2.0HP
Ø15.88
≥ 2.3 HP
Ø15.88
Connections including Indoor Units 8 and 10 HP
are not possible
Liquid
Ø6.35
Ø6.35
Ø9.52