LG ARUN40LS2A - Page 14

14
ENGLISH
Combination of Y branch/header method
Correction factor of Indoor unit
Example : 5 Indoor Units con-
nected
Ⓐ : Outdoor Unit
Ⓑ : 1st branch (Y branch)
Ⓒ : Y branch
Ⓓ : Indoor Unit
Ⓔ : Header
Ⓕ : Sealed piping
L 150m
40m
H 50m
Branch pipe can not be used after
header
Total pipe length = A+a+b+c+d+e+f ≤ 300m
* : Assume equivalent pipe length of Y branch to be 0.5m, that of
header to be 1m, calculation purpose.
L
Longest pipe length Equivalent pipe length(*)
A+f ≤ 150m A+f ≤ 175m
l
Longest pipe length after 1st branch
f ≤ 40m
H
Difference in height(Outdoor Unit ÷ Indoor Unit)
H ≤ 50m (40m : Outdoor Unit is lower)
h
Difference in height (Indoor Unit ÷ Indoor Unit)
h ≤ 15m
CAUTION
Indoor Unit should be installed at lower position than the header.
!
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.
!
Total pipe length = A+B+C+a+b+c+d+e ≤ 300m
Refrigerant pipe diameter from branch to branch (B,C)
* : Assume equivalent pipe length of Y branch to be 0.5m, that of
header to be 1m, calculation purpose.
L
Longest pipe length Equivalent pipe length(*)
A+B+b ≤ 150m A+B+b ≤ 175m
l
Longest pipe length after 1st branch
B+b ≤ 40m
H
Difference in height(Outdoor Unit ÷ Indoor Unit)
H ≤ 50m (40m : Outdoor Unit is lower than Indoor Units)
h
Difference in height (Indoor Unit ÷ Indoor Unit)
h ≤ 15m
CAUTION
Indoor Unit should be installed at lower position than the header
!
WARNING
It is recommended that difference of piping length for pipes con-
nected to the Indoor Unit is
minimized. Performance difference between Indoor Units may
occur.
!
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)
The Amount of Refrigerant
The calculation of the additional charge should take into account the
length of pipe.
Example : 5 HP
L1
L2 L3
abcd
1WAY
2.2kW
2WAY
5.6kW
4WAY
2.2kW
4WAY
7.1kW
Length(m) of
liquid pipe of Ø9.52mm
Additional
charge(kg)
Total
charge(kg)
Additional
charge(kg)
Product
charge(kg)
Length(m) of
liquid pipe of Ø6.35mm
Correction factor of
outdoor unit
Correction factor of
Indoor unit
Product charge(kg)
=
+
+
+
+
x 0.061(kg/m)
x 0.022(kg/m)
+
Additional charge amount R (kg)
= (Lx x 0.022kg/m) + (Ly x 0.061kg/m) + Correction factor of outdoor
unit + Correction factor of indoor unit
= (12 x 0.022kg/m) + (28 x 0.061kg/m) + 0 + 0.2 + 0.16 + 0.25 + 0.48
= 3.062
Lx : Real total length of liquid pipe Ø6.35(m)
Ly : Real total length of liquid pipe Ø9.52(m)
L1 Ø9.52:10m L2 Ø9.52:10m L3 Ø9.52:5m
a Ø9.52:3m b Ø6.35:3m c Ø6.35:4m d Ø6.35:5m
1.6
(5.5)
2.2
(7.5)
2.8
(9.6)
3.6
(12.3)
4.5
(15.4)
5.6
(19.1)
7.1
(24.2)
8.2
(28.0)
10.6
(36.2)
12.3
(42.0)
14.1
(48.1)
Capacity : kW(kBtu)
Indoor unit
(unit : kg)
- 0.17 0.17 0.17 0.17 0.37 0.37 - - - -
- 0.17 0.17 0.17 0.17 0.26 0.26 0.44 0.44 0.44 0.62
- 0.24 0.24 0.24 0.24 0.28 0.28 - - - -
- 0.20 0.20 0.20 - 0.29 0.29 - - - -
- - - - - 0.16 0.16 - - - -
0.25 0.25 0.25 0.25 0.32 0.32 0.48 0.48 0.64 0.64 0.64
- 0.10 0.10 0.10 0.10 0.29 0.29 - - - -
- 0.17 0.17 0.17 0.17 0.37 0.37 - - - -
Ceiling Concealed Duct(Low Static)
Ceiling Concealed Duct(High Static)
Wall Mounted
1WAY Ceiling Cassette
2WAY Ceiling Cassette
4WAY Ceiling Cassette
Artcool
Floor Standing
NOTE
!
Fill in the f-gas Label attached on outdoor about the quantity of the fluorinated
greenhouse gases
① Manufacturing site (See Model Name label)
② Installation site (If possible being placed adjacent to the service points for
the addition or removal of refrigerant)
③ The total Charge (①+②)