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