LG Multi V Water IV ARWN080LAS4 Manual De Instalación página 15

! 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
Standard Pipe
Outside unit
Diameter
total capacity
Liquid pipe Gas pipe
HP
[mm(inch)] [mm(inch)]
8 Ø 9.52(3/8) Ø 22.2(7/8)
10 Ø 9.52(3/8) Ø 22.2(7/8)
12 ~ 14 Ø 12.7(1/2) Ø 25.4(1)
16 Ø 12.7(1/2) Ø 28.58(1-1/8)
18 ~ 20 Ø 12.7(1/2) Ø 28.58(1-1/8)
22 ~ 34 Ø 19.05(3/4) Ø 34.9(1-3/8)
36 ~ 60 Ø 19.05(3/4) Ø 41.3(1-5/8)
62 ~ 64 Ø 22.2(7/8) Ø 44.5(1-3/4)
66 ~ 80 Ø 22.2(7/8) Ø 53.98(2-1/8)
(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
Diameter of pipes be-
40 m < B+C+D+e ≤ 90 m
tween first branch and the
last branch should be in-
1
creased by one step, ex- B, C, D Change a
cept pipe diameter B,C,D diameter
is same as Diameter A
While calculating whole re-
A+Bx2+Cx2+
frigerant pipe length, pipe
2 Dx2+a+b+c+d+e
B,C,D length should be cal-
≤ 500 m
culated twice.
Length of pipe from each
a,b,c,d,e ≤ 40 m
3 indoor unit to the closest
branch ≤ 40 m
Length of pipe from out-
door unit to the farthest
(A+B+C+D+e)-
indoor unit 5
(A+a)
(A+B+C+D+e)] - [Length
4
of pipe outdoor unit to the
≤ 40 m
closest indoor unit 1
(A+a)] ≤ 40 m
Increased Pipe Diameter
When equivalent pipe length is 90m
or more from ODU to farthest IDU
Liquid pipe Gas pipe
[mm(inch)] [mm(inch)]
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 31.8(1-1/4)
Ø 15.88(5/8) Ø 31.8(1-1/4)
Ø 22.2(7/8) Ø 38.1(1-1/2)
Ø 22.2(7/8) Ø 41.3(1-5/8)
Ø 25.4(1) Ø 53.98(2-1/8)
Ø 25.4(1) Ø 53.98(2-1/8)
Liquid pipe Gas pipe
[mm(inch)] [mm(inch)]
Ø6.35(1/4) Ø12.7(1/2)
Ø9.52(3/8) Ø15.88(5/8)
Ø9.52(3/8) Ø19.05(3/4)
Ø9.52(3/8) Ø22.2(7/8)
Ø12.7(1/2) Ø28.58(1-1/8)
Ø15.88(5/8) Ø28.58(1-1/8)
Ø15.88(5/8) Ø34.9(1-3/8)
Ø19.05(3/4) Ø34.9(1-3/8)
Ø19.05(3/4) Ø41.3(1-5/8)
Ø22.2(7/8) Ø44.5(1-3/4)
Ø22.2(7/8) Ø53.98(2-1/8)
Example
Ø6.35 → Ø9.52, Ø9.52 → Ø12.7,
Ø12.7 → Ø15.88, Ø15.88 → Ø19.05,
Ø22.2 → Ø25.4,
Ø19.05→ Ø22.2,
Ø25.4 → Ø28.58, Ø28.58 → Ø31.8,
Ø31.8 → Ø34.9, Ø34.9 → Ø38.1
IDU
Direction
L
40 m
! WARNING
Pipe length after header branching (a~f)
It is recommended that difference in length of the pipes con-
nected to the Indoor Units is minimized. Performance difference
between Indoor Units may occur.
Outside unit Connection
! WARNING
• In case of pipe diameter B connected after first branch is bigger than
the main pipe diameter A, B should be of the same size with A.
Ex) In case indoor unit combination ratio 120% is connected to
20HP(58kW) outside unit .
1) Outside unit main pipe diameter A : Ø28.58(Gas pipe),
Ø12.7(liquid pipe)
2) Pipe diameter B after first branch according to 120% indoor unit
ombination(69.6kW) : Ø28.58(gas pipe), Ø15.88(liquid pipe)
Therefore, pipe diameter B connected after first branch
would be Ø28.58(gas pipe) / Ø12.7(liquid pipe) which is
same with main pipe diameter.
Indoor Unit Connection
Indoor unit connecting pipe from branch (a~f)
Indoor Unit capacity Liquid pipe
[kW(Btu/h)] [mm(inch)]
≤ 5.6(19,100)
Ø6.35(1/4)
< 16.0(54,600) Ø9.52(3/8)
< 22.4(76,400) Ø9.52(3/8)
< 28.0(95,900) Ø9.52(3/8)
! CAUTION
• Bending radius should be
at least twice the diameter
of the pipe.
• Bend pipe after 500 mm or
more from branch(or
header).
Do not bend U type.
It may cause Performance
unsatisfactory or noise.
Pipe Connection Method/Precautions for
Series connections between Outside units
- Separate Y branch joints are needed for series connections between
outside unit s.
- Please refer to the below connection examples to install pipe connec-
tions between outside unit s.
Pipe connection between outside
unit s (General Case)
Pipes between outside unit s
are 2m or less
Gas pipe
[mm(inch)]
Ø12.7(1/2)
Ø15.88(5/8)
Ø19.05(3/4)
Ø22.2(7/8)
500mm or more 500mm or more
The maximum pipe
length after the first
branching between the
outside unit is 10m or les
2m or less
15