Hitachi EV-1.5N1, Service Manual

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