LG MULTI V WATER IV ARWV100DAL4 Installation Manual page 24

Refrigerant piping system
Ú Refrigerant pipe diameter from outdoor unit to first branch. (A, E, F, G)
Upward Outdoor unit
total capacity
kW
23
29
35
41
5* If the step up size is not available, you can not select the next higher size available.
u (Table 1) Cautions during the installation of Maximum pipe length 90m after the 1st branch
WARNING
To install maximum pipe length after the 1st branch exceeding 40 m and 90 m or less, the following condi-
tions must be satisfied.
Required
Select the diameter of the pipe be-
tween the 1st branch and the last
branch to be 1 level larger.
1
Provided that, it is not necessary if
the pipe diameter is the same as the
main pipe.
During the calculation of the total re-
2 frigerant pipe length, the above pipe
length shall be calculated as twice.
The length from each indoor unit to
3
the nearest branch pipe ≤ 40 m
Length from outdoor unit to the far-
thest indoor unit] – [Length from out-
4
door unit to the nearest indoor unit] ≤
40 m
24 24 Outside Unit Outside Unit
Standard Pipe Diameter
Liquid pipe(mm)
Ø 9.52
Ø 9.52
Ø 12.7
Ø 12.7
40 m < B+C+D+e ≤ 90 m
Change B, C, and D pipe
Dx2+a+b+c+d+e ≤ 500 m
(A+B+C+D+e)-(A+a)
When pipe length is 90m or more from ODU to
Gas pipe(mm) Liquid pipe(mm)
Ø 19.05
Ø 22.2
Ø 22.2
Ø 25.4
→
diameter.
A+Bx2+Cx2+
a,b,c,d,e ≤ 40 m
≤ 40 m
Increased Pipe Diameter
1st branch
Ø 12.7
Ø 12.7
Ø 15.88
Ø 15.88
Example
Ø6.35 → Ø9.52, Ø9.52 → Ø12.7,
Ø12.7 → Ø15.88, Ø15.88 → Ø19.05,
Ø19.05 → Ø22.2, Ø22.2 → Ø25.4,
Ø25.4 → Ø28.58, Ø28.58 → Ø31.8,
Ø31.8 → Ø34.9, Ø34.9 → Ø38.1
L
40 m
Gas pipe(mm)
Ø 22.2
Ø 22.2
Ø 25.4
Ø 28.58
IDU
Direction