LG ARUM080LTE5 Engineering Product Data Book page 725

Multi V 5
7. Refrigerant piping system
7.1 Pipe Connection Method between outdoor unit/indoor unit
7.1.1 Heat Recovery System : 4 Outdoor Units
Example : 12 Indoor Units connected
ⓐ Outdoor Unit
ⓑ Y branch
ⓓ Indoor Units
E : Connection branch pipe between Outdoor units : ARCNB41
F : Connection branch pipe between Outdoor units : ARCNB31
G: Connection branch pipe between Outdoor units : ARCNB21
ⓗ Header
ⓛ HR Unit
H
• Case 1 ("a") : Maximum height is 30m(98.4ft) if you install with Y branch.
• Case 2 ("b") : Maximum height is 5m(16.4ft) in serial connection of HR units.
WARNING
• Branch pipe can not be used after header
• It is recommended that difference in length of the pipes connected to the indoor units (a~f) is minimized.
The large difference in pipe lengths, the more different performance between indoor units.
• * : Serial connection of HR units : Capacity sum of indoor units ≤ 230 kBtu/h
If the large capacity indoor units (Over 5 HP; using overØ15.88/Ø9.52) are installed, it should be used
the Valve Group setting.
• Refer to the HR unit PCB part for the valve group control setting.
• Piping length from outdoor branch to outdoor unit ≤ 10m(32.8ft), equivalent length : max 13m(42.7ft)
(for 2 units combination or more)
14
Slave 3
Slave 2
Slave 1
G
F
E
1
a
2
b
C1
c
3
"a"
d
h
4
e
5
Master
ODU Capacity
Master ≥ Slave1 ≥ Slave 2 ≥ Slave 3
A
B
C3
C2
g
i "b"
7
D
f
8
l
9
6
Installation of Outdoor Units
k
j
sealing
m n
10
11 12