Installation Manual
29
ENGLISH
Refrigerant piping system
Below 2m
Master
Slave
L150m (200m**)
Below H 50 m
l
40m (90m**)
Below 15 m
Indoor unit
direction
Below 10m
Ú
Slave outside unit ~ Connecting
branch pipe
Ⓔ
: Pipe diameter
between outside units (E)
Ú
Connecting branch pipe
Ⓔ
~ 1st
branch part
Ⓑ
: Main pipe diameter (A)
Ú
Refrigerant pipe diameter from branch
to branch (B, C, D)
Ú
Total refrigerant pipe length =
A + B + C + D + a + b + c + d + e ≤ 300m (500m**)
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)
2. When installing 2 outside units
Ex) 5 indoor units connected
Ⓐ
: Outside units
Ⓑ
: 1st branch
Ⓒ
: Indoor units
Ⓓ
: Indoor unit direction
Ⓔ
: Connecting branch pipe between out-
side units
h
Connecting branch pipe between outside
units: ARRCN20(
ⓔ
)
For the first branch pipe (B), use the branch pipe
that fits the main pipe diameter (A).
• When the pipe diameter (B) connected after 1st branching is larger than the main pipe diameter (A), Install the pipe with the pipe diameter
(B) after 1st branching that is the same as the main pipe diameter (A).
Ex) When connecting with 120% of the indoor unit to 10 HP.
1) Outside unit main pipe diameter: 22.2 (Gas pipe) / 9.52(Liquid pipe)
2) Pipe diameter after 1st branching by 120% indoor unit combination : 28.58 (Gas pipe) / 12.7 (Liquid pipe)
Therefore set the pipe diameter (B) after 1st branching to 22.2 (Gas pipe) / 9.52 (Liquid pipe) of main pipe diameter (A).
• When the pipe distance corresponding to the farthest indoor unit from the outside unit is 90m or above, you must change the main pipe
diameter according to the outside unit capacity in accordance with the following table. (This applies to both the liquid and gas pipes.)
Liquid pipe (mm) Gas pipe (mm)
Low/high pressure
common pipe (mm)
Ø9.52/12.7
Ø22.2/28.58
Ø19.05
Longest pipe length
Equivalent pipe length
A + B + C + D + e
≤
150m(200m**) A + B + C + D + e
≤
175m(225m**)
Longest pipe length after 1st branching
B + C + D + e
≤
40m(90m**)
High/Low difference (Outside unit
÷
Indoor unit)
H
≤
50 m
High/Low difference (Indoor unit
÷
Indoor unit)
h
≤
15 m
High/Low difference (Indoor unit
÷
Indoor unit)
h
≤
2 m
L
ℓ
H
h
h1
(**) : Conditional application
Outside unit capacity
Liquid pipe (mm)
Gas pipe (mm)
24, 26, 28, 30 HP
Ø 19.05
Ø 34.9
32, 34, 36, 38, 40 HP
Ø 19.05
Ø 41.3
Gas pipe (mm)
Liquid pipe (mm)
24, 26, 28, 30 HP…………Ø 34.9
’
Ø 38.1
24, 26, 28, 30, 32, 34, 36, 38, 40 HP
…………Ø 19.05
’
Ø 22.2
32, 34, 36, 38, 40 HP………Ø 41.3
Summary of Contents for MULTI V WATER II ARWN Series
Page 81: ......
