LG ARUN50GS2A Quick Manual page 14

14
Total pipe length = A+a+b+c+d+e+f ≤ 300m
Longest pipe length
L
A+f ≤ 150m
Longest pipe length after 1st branch
f ≤ 40m
Difference in height(Outdoor Unit ÷ Indoor Unit)
H
H ≤ 50m (40m : Outdoor Unit is lower)
Difference in height (Indoor Unit ÷ Indoor Unit)
h
h ≤ 15m
* : Assume equivalent pipe length of Y branch to be 0.5m, that of
header to be 1m, calculation purpose.
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.
Combination of Y branch/header method
Example : 5 Indoor Units con-
nected
Ⓐ : Outdoor Unit
Ⓑ : 1st branch (Y branch)
Ⓒ : Y branch
Ⓓ : Indoor Unit
Ⓔ : Header
Ⓕ : Sealed piping
Refrigerant pipe diameter from branch to branch (B,C)
Downward Indoor Unit total capacity
[kW(Btu/h)]
≤ 5.6(19,100)
< 16.0(54,600)
< 22.4(76,400)
Total pipe length = A+B+C+a+b+c+d+e ≤ 300m
Longest pipe length
L
A+B+b ≤ 150m
Longest pipe length after 1st branch
B+b ≤ 40m
Difference in height(Outdoor Unit ÷ Indoor Unit)
H
H ≤ 50m (40m : Outdoor Unit is lower than Indoor Units)
Difference in height (Indoor Unit ÷ Indoor Unit)
h
h ≤ 15m
* : Assume equivalent pipe length of Y branch to be 0.5m, that of
header to be 1m, calculation purpose.
CAUTION
!
Indoor Unit should be installed at lower position than the header
Equivalent pipe length(*)
A+f ≤ 175m
L 150m
40m
Branch pipe can not be used after
header
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)
Equivalent pipe length(*)
A+B+b ≤ 175m
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.
The Amount of Refrigerant
The calculation of the additional charge should take into account the
length of pipe.
Product
charge(kg)
Additional Length(m) of
=
charge(kg) liquid pipe of Ø9.52mm
Length(m) of
+
liquid pipe of Ø6.35mm
Correction factor of
+
outdoor unit
Correction factor of
+
Indoor unit
Total
+
Product charge(kg)
charge(kg)
Example : 5 HP
L2
L1
a
1WAY
2.2kW
L1 Ø9.52:10m L2 Ø9.52:10m L3
a Ø9.52:3m b Ø6.35:3m
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)
Correction factor of Indoor unit
Capacity : kW(kBtu)
1.6 2.2
(5.5) (7.5)
Indoor unit
Ceiling Concealed Duct(Low Static)
- 0.17 0.17 0.17 0.17 0.37 0.37
Ceiling Concealed Duct(High Static) - 0.17 0.17 0.17 0.17 0.26 0.26 0.44 0.44 0.44 0.62
Wall Mounted
- 0.24 0.24 0.24 0.24 0.28 0.28
1WAY Ceiling Cassette - 0.20 0.20 0.20
2WAY Ceiling Cassette
- -
4WAY Ceiling Cassette 0.25 0.25 0.25 0.25 0.32 0.32 0.48 0.48 0.64 0.64 0.64
Artcool - 0.10 0.10 0.10 0.10 0.29 0.29
Floor Standing
- 0.17 0.17 0.17 0.17 0.37 0.37
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)
x 0.061(kg/m)
x 0.022(kg/m)
Additional
+
charge(kg)
L3
b c d
2WAY 4WAY 4WAY
5.6kW 2.2kW 7.1kW
Ø9.52:5m
c Ø6.35:4m d Ø6.35:5m
(unit : kg)
2.8 3.6 4.5 5.6 7.1 8.2 10.6 12.3
(9.6) (12.3) (15.4) (19.1) (24.2) (28.0) (36.2) (42.0)
- - -
- - -
- 0.29 0.29 - - -
- - - 0.16 0.16 - - -
- - -
- - -
14.1
(48.1)
-
-
-
-
-
-