LG Multi V ARWN Series Installation Manual page 15

Header method
Ⓐ : Outside Unit
10m or
Ⓑ : Header
less
Ⓒ : Indoor Units
Ⓓ : Sealed piping
Ⓔ : Connection branch pipe
between Outside units :
ARCNN41
Ⓕ : Connection branch pipe
between Outside units :
ARCNN31
Ⓖ : Connection branch pipe
between Outside units :
ARCNN21
Pipe Connection Method between outside unit
/indoor unit
Slave1
Master
L2
L3
E
Indoor
Unit
1st branch
Refrigerant pipe diameter from outside unit to first branch
l 40m
h 40m
h See Table 2
A : Refrigerant pipe diameter from outside unit to first branch
E : Refrigerant pipe diameter for outside unit capacity
(Slave 1+ Slave 2+ Slave 3)
F : Refrigerant pipe diameter for outside unit capacity
(Slave 2+ Slave 3)
G : Refrigerant pipe diameter for outside unit capacity(Slave 3)
Level Difference (H1)
(Outside unit ÷ Outside unit)
Max length from first branch to
each outside unit (L1,L2,L3,L4)
( Table 1 ) Limit Pipe length
Classifica-
Section Type
tion
Maximum
pipe
length(L)
Outside Unit
Max pipe Equivalent
÷
length pipe length
Indoor Unit
Total pipe
length
Outside Unit
Difference in
Max
÷ Indoor Unit
height(H)
difference
Indoor Unit
Difference in
in height
÷ Indoor Unit
height(h)
Longest pipe
Pipe
length after
length(l)
1st branch
h * : See Table 4
ODU Capacity
Slave3
Master ≥ Slave 1 ≥Slave 2 ≥Slave 3
Slave2
Slave1
Master
L 150m
l 40m
C C
C C C
h 40m
Slave2
Slave3
H1
L4
F G
L1
2m
Less than 10m
(equivalent length of piping 13m)
Header
Y branch Y/header branch
branch
A+B+b ≤150 m
A+B+C+D+e
A+f ≤
A+C+e ≤150 m
≤ 150 m
(Conditionally
(Conditionally 200 m)*
200m)*
175 m 175 m
(Conditionally (Conditionally 175 m
225 m)* 225 m)*
300 m 300 m 300 m
(Conditionally (Conditionally (Condition-
500 m)* 500 m)* ally 500 m)*
50 m 50 m
40 m 40 m
40 m 40 m
(Conditionally (Conditionally
90m)* 90m)*
! WARNING
Increased Pipe Diameter(table 2)
- When pipe length is Over 40m from 1st branch to longest IDU.
(Table 2) Refrigerant pipe diameter from outside unit to first branch. (A)
Upward
C Standard Pipe
Outside unit
total capacity
Liquid pipe
kW
[mm(inch)]
8 Ø 9.52(3/8)
10 Ø 9.52(3/8)
12 ~ 14 Ø 12.7(1/2)
16 Ø 12.7(1/2)
18 ~ 20 Ø 12.7(1/2)
22 ~ 34 Ø 19.05(3/4)
36 ~ 60 Ø 19.05(3/4)
62 ~ 64 Ø 22.2(7/8)
66 ~ 80 Ø 22.2(7/8)
(Table 3) Refrigerant pipe diameter from first branch to last branch (B,C,D)
Downward indoor unit
total capacity [kW(Btu/h)]
≤ 5.6(19,100)
< 16.0 (54,600)
≤ 22.4 (76,400)
< 33.6 (114,700)
< 50.4 (172,000)
< 67.2 (229,400)
< 72.8(248,500)
< 100.8(344,000)
< 173.6(592,500)
< 184.8(630,700)
≤ 224.0(764,400)
(Table 4) Conditional Application
• To satisfy below condition to make 40 m ~ 90 m of pipe length after first branch.
Required
Select the diameter of the
pipe between the 1st
branch and the last branch
to be 1 level larger.
1
Provided that, it is not
necessary if the pipe di-
150 m
ameter is the same as the
main pipe.
During the calculation of
the total refrigerant pipe
2 length, the above pipe
length shall be calcu-
lated as twice.
The length from each in-
50 m 3 door unit to the nearest
branch pipe ≤ 40 m
40 m Length from outside unit
to the farthest indoor
4 unit] – [Length from out-
side unit to the nearest
40 m
indoor unit] ≤ 40 m
Increased Pipe Diameter
When equivalent pipe length is 90m
Diameter
or more from ODU to farthest IDU
Gas pipe Liquid pipe
[mm(inch)] [mm(inch)]
Ø 22.2(7/8) Ø 12.70(1/2)
Ø 22.2(7/8) Ø 12.70(1/2)
Ø 25.4(1) Ø 15.88(5/8)
Ø 28.58(1-1/8) Ø 15.88(5/8)
Ø 28.58(1-1/8) Ø 15.88(5/8)
Ø 34.9(1-3/8) Ø 22.2(7/8)
Ø 41.3(1-5/8) Ø 22.2(7/8)
Ø 44.5(1-3/4) Ø 25.4(1)
Ø 53.98(2-1/8) Ø 25.4(1)
Liquid pipe
[mm(inch)]
Ø6.35(1/4)
Ø9.52(3/8)
Ø9.52(3/8)
Ø9.52(3/8)
Ø12.7(1/2)
Ø15.88(5/8)
Ø15.88(5/8)
Ø19.05(3/4)
Ø19.05(3/4)
Ø22.2(7/8)
Ø22.2(7/8)
Example
Ø6.35 ' Ø9.52,
40 m < B+C+D+e ≤ 90 m
Ø12.7 ' Ø15.88, Ø15.88 ' Ø19.05,
'
Ø19.05' Ø22.2,
Change B, C, and D pipe
Ø25.4 ' Ø28.58, Ø28.58 ' Ø31.8,
diameter.
Ø31.8 ' Ø34.9,
A+Bx2+Cx2+
Dx2+a+b+c+d+e
≤ 500 m
a,b,c,d,e ≤ 40 m
40 m
(A+B+C+D+e)-
(A+a)
≤ 40 m
15
Gas pipe
[mm(inch)]
Ø 25.4(1)
Ø 25.4(1)
Ø 28.58(1-1/8)
Ø 31.8(1-1/4)
Ø 31.8(1-1/4)
Ø 38.1(1-1/2)
Ø 44.5(1-3/4)
Ø 53.98(2-1/8)
Ø 63.5(2-1/2)
Gas pipe
[mm(inch)]
Ø12.7(1/2)
Ø15.88(5/8)
Ø19.05(3/4)
Ø22.2(7/8)
Ø28.58(1-1/8)
Ø28.58(1-1/8)
Ø34.9(1-3/8)
Ø34.9(1-3/8)
Ø41.3(1-5/8)
Ø44.5(1-3/4)
Ø53.98(2-1/8)
Ø9.52 ' Ø12.7,
Ø22.2 ' Ø25.4,
Ø34.9 ' Ø38.1
IDU
Direction
L