LG ARUN BTE4 Series, Installation Manual

Page: 12 / 91

(Table 2) Refrigerant pipe diameter from outdoor unit to first branch. (A)
(Table 3) Refrigerant pipe diameter from first branch to last branch (B,C,D)
Upward
Outdoor unit
total capacity
Standard Pipe
Diameter
Increased Pipe Diameter
When equivalent pipe length is 90m
or more from ODU to farthest IDU
When level difference is
50m or more
HP
Liquid pipe
[mm(inch)]
Gas pipe
[mm(inch)]
Liquid pipe
[mm(inch)]
Gas pipe
[mm(inch)]
Liquid pipe
[mm(inch)]
Gas pipe
[mm(inch)]
8 Ø 9.52(3/8) Ø 19.05(3/4) Ø 12.7(1/2) Ø 22.2(7/8) Ø 12.7(1/2) not increased
10 Ø 9.52(3/8) Ø 22.2(7/8) Ø 12.7(1/2) Ø 25.4(1) Ø 12.7(1/2) not increased
12 ~ 14 Ø 12.7(1/2) Ø 28.58(1-1/8) Ø 15.88(5/8) not increased Ø 15.88(5/8) not increased
16 Ø 12.7(1/2) Ø 28.58(1-1/8) Ø 15.88(5/8) Ø 31.8(1-1/4) Ø 15.88(5/8) not increased
18 ~ 22 Ø 15.88(5/8) Ø 28.58(1-1/8) Ø 19.05(3/4) Ø 31.8(1-1/4) Ø 19.05(3/4) not increased
24 Ø 15.88(5/8) Ø 34.9(1-3/8) Ø 19.05(3/4) not increased Ø 19.05(3/4) not increased
26 ~ 34 Ø 19.05(3/4) Ø 34.9(1-3/8) Ø 22.2(7/8) Ø 38.1(1-1/2) Ø 22.2(7/8) not increased
36 ~ 60 Ø 19.05(3/4) Ø 41.3(1-5/8) Ø 22.2(7/8) not increased Ø 22.2(7/8) not increased
Downward indoor unit
total capacity [kW(Btu/h)]
Liquid pipe
[mm(inch)]
Gas pipe
[mm(inch)]
≤
5.6(19,100) Ø6.35(1/4) Ø12.7(1/2)
< 16.0 (54,600) Ø9.52(3/8) Ø15.88(5/8)
≤
22.4 (76,400) Ø9.52(3/8) Ø19.05(3/4)
< 33.6 (114,700) Ø9.52(3/8) Ø22.2(7/8)
< 50.4 (172,000) Ø12.7(1/2) Ø28.58(1-1/8)
< 67.2 (229,400) Ø15.88(5/8) Ø28.58(1-1/8)
< 72.8(248,500) Ø15.88(5/8) Ø34.9(1-3/8)
< 100.8(344,000) Ø19.05(3/4) Ø34.9(1-3/8)
< 173.6(592,500) Ø19.05(3/4) Ø41.3(1-5/8)
(Table 4) Conditional Application
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
24HP(67.2 kW) outdoor unit.
1) Outdoor unit main pipe diameter A : Ø34.9(Gas pipe),
Ø15.88(liquid pipe)
2) Pipe diameter B after first branch according to 120% indoor
unit ombination(80.6kW) : Ø34.9(gas pipe), Ø19.05(liquid pipe)
Therefore, pipe diameter B connected after first branch
would be Ø34.9(gas pipe) / Ø15.88(liquid pipe) which is
same with main pipe diameter.
!
Condition Example
1
Diameter of pipes be-
tween first branch and the
last branch should be in-
creased by one step, ex-
cept pipe diameter B,C,D
is same as Diameter A
40 m‹B+C+D+e
≤
90 m
’
B, C, D Change a
diameter
2
While calculating whole re-
frigerant pipe length, pipe
B,C,D length should be cal-
culated twice.
A+Bx2+Cx2+Dx2
+a+b+c+d+e
≤
1 000 m
3
Length of pipe from each
indoor unit to the closest
branch
a,b,c,d,e
≤
40 m
4
Length of pipe from out-
door unit to the farthest
indoor unit 5
(A+B+C+D+e)] - [Length
of pipe outdoor unit to the
closest indoor unit 1
(A+a)]
≤
40 m
(A+B+C+D+e)-
(A+a)
≤
40 m
• To satisfy below condition to make 40 m ~ 90 m of pipe length after first branch.
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
h 40m
H 110m
L
Indoor
Unit
12
ENGLISH
Pipe Connection Method between outdoor
unit/indoor unit
Header Method
Ⓐ
: Outdoor Unit
Ⓑ
: Header branch
Ⓒ
: Indoor Units
Ⓓ
: Sealing
Ⓔ
: Connection branch pipe
between Outdoor units:
ARCNN31
Ⓕ
: Connection branch pipe
between Outdoor units:
ARCNN21
Slave2
Slave1
Master
Slave2
Slave1
Master
l
40m
H 110m
L200m
h 40m
10m or
less
ODU Capacity
Master ≥ Slave 1 ≥Slave 2 ≥Slave 3
B
C C
C C C
D
C
h
See Table 2
A : Refrigerant pipe diameter from outdoor unit to first branch
E : Refrigerant pipe diameter for outdoor unit capacity
(Slave 1+ Slave 2)
F : Refrigerant pipe diameter for outdoor unit capacity
(Slave 2)
h
* : See Table 4
L1
L2
L3
H1
- .
Slave2
Slave1
Master
l
40m
h 40m
Indoor
Unit
1st branch
Refrigerant pipe diameter from outdoor unit to first branch
Level Difference
(Outdoor unit
↔
Outdoor unit)
5m
Max length from first branch to
each outdoor unit (L1, L2, L3)
Less than 10m
(equivalent length of piping 13m)
WARNING
Increased Pipe Diameter(table 2)
- When pipe length is 90m or more from ODU to 1st branch
- When level difference is 50m or more
!
Y branch
Method
Combination of Y
branch/header
Method
Header
Method
Max pipe
length
Outdoor Unit
↔
Indoor Unit
Longest
pipe
length(L)
A+B+C+D+e
≤
150 m
(200 m: Conditional
application)*
A+B+b
≤
150 m
A+C+e
≤
150 m
(200 m: Conditional
application)*
A+f
≤
200 m
Equivalent
pipe length
175 m
(225 m: Conditional
application)*
175 m
(225 m: Conditional
application)*
225 m
Total pipe
length
1,000 m 1,000 m 1,000 m
Max
difference
in height
Outdoor Unit
↔
Indoor Unit
Difference in
height(H)
110 m 110 m 110 m
Indoor Unit
↔
Indoor Unit
Difference in
height(h)
40 m 40 m 40 m
Longest pipe
length after
1st branch
Pipe
length(l)
40 m
(90 m: Conditional
application)*
40 m
(90 m: Conditional ap-
plication)*
40 m
(Table 1) Limit Pipe length