LG MULTI V ARWN80LA2 Product Data page 139

7.3.3 When installing 3 outside units
Ex) 5 Indoor Units connected
: Outside Unit
: 1st branch(Y branch)
: Y branch
: Indoor Unit
: Connection branch pipe between Outside
units:ARCNN30
: Connection branch pipe between Outside
units:ARCNN20
: Header
: Sealing
Slave2 outside unit ~ Connecting
branch pipe : Pipe diameter
between outside units (F)
Liquid pipe (mm) Gas pipe (mm)
Ø9.52/12.7 Ø22.2/28.58
Slave1 outside unit ~ Connecting
branch pipe : Pipe diameter
between outside units (E)
Liquid pipe (mm) Gas pipe (mm)
Ø15.88/19.05 Ø34.9/41.3
Connecting branch pipe
branch part : Main pipe diameter (A)
Outside unit capacity Liquid pipe (mm)
50, 60HP Ø19.05
Refrigerant pipe diameter from branch
to branch (B, C)
Total capacity of indoor units
connected to after branching (kW)
≤ 5.6
< 16
≤ 22.4
< 33
< 47
< 71
< 104
104 ≤
27
27
10m or
less
Low/high pressure
common pipe
Branch pipe can not be used after header
Ø19.05
Low/high pressure
common pipe
Ø19.05
~ 1st Y
Gas pipe (mm)
Ø41.3
Liquid pipe Gas pipe
(mm) (mm)
Ø6.35 Ø12.7
Ø9.52 Ø15.88
Ø9.52 Ø19.05
Ø9.52 Ø22.2
For the first branch pipe (B), use the branch pipe
Ø12.7 Ø28.58
that fits the main pipe diameter (A).
Ø15.88 Ø28.58
Ø19.05 Ø34.9
Ø19.05 Ø41.3
Slave2
Slave1
Master
Below 2m Below 2m w 2m
(h1) (h1)
Total refrigerant pipe length =
A + B + C + a + b + c + d + e ≤ 300 m
Longest pipe length (Equivalent pipe length)
L
A +B +b,A +C +e ≤ 150 m(175 m)
Longest pipe length after 1st branching
B +b,C +e ≤ 40 m
High/Low difference (Outside unit
H
H 50 m
High/Low difference (Indoor unit
h
h 15 m
High/Low difference (Outside unit
h1
h 2 m
L150m
l40m
Indoor unit)
Indoor unit)
Outside unit)
Installation