LG MULTI V IV ARUB080BTE4, Руководство по установке

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ENGLISH
Pipe Connection Method/Precautions for
Series connections between Outdoor units
- Separate Y branch joints are needed for series connections between
outdoor units.
- Please refer to the below connection examples to install pipe connec-
tions between outdoor units.
- If the distance between the outdoor units becomes more than 2m,
apply Oil Traps between the gas pipes.
- If the outdoor unit is located lower than the main pipe, apply Oil Trap.
Pipe connection between outdoor
units (General Case)
The maximum pipe
length after the first
branching between the
outdoor units is 10m or
less
Pipes between outdoor units
are 2m or less
Examples of Wrong Pipe Connections
2m or less
Pipes between outdoor units
are 2m or longer
Oil Trap
Oil Trap Oil Trap
2m or less
2m or less 2m or less
0.2m or more
2m or longer
2m or longer 2m or longer
If the main pipe is
higher than the
outdoor units, oil is
accumulated in the
outdoor unit.
If there are differences in the height
between the outdoor units, oil is
accumulated in the lower outdoor unit.
Oil Trap
Outdoor unit Connection
Indoor Unit Connection
Indoor Unit connecting pipe from branch (a,b,c,d,e,f)
Indoor Unit 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)
< 28.0(95,900) Ø9.52(3/8) Ø22.2(7/8)
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
70kW outdoor unit.
1) Outdoor unit main pipe diameter A : Ø34.9(Low pressure
gas pipe), Ø15.88(liquid pipe), Ø28.58(High Pressure liq-
uid pipe)
2) Pipe diameter B after first branch according to 120% in-
door unit combination(84kW) : Ø34.9(Low pressure gas
pipe), Ø19.05(liquid pipe), Ø28.58(High Pressure liquid
pipe)
Therefore, pipe diameter B connected after first branch
would be Ø34.9(Low pressure gas pipe), Ø15.88(liquid
pipe), Ø28.58(High Pressure liquid pipe) which is same
with main pipe diameter.
[Example]
Do not choose the main pipe diameter by downward indoor unit
total capacity but its outdoor unit model name.
Do not let the connection pipe from branch to branch exceed the
main pipe diameter chosen by outdoor unit model name.
EX) Where connecting the indoor units to the 22 HP (61.5 kW)
outdoor unit to 120% of its system capacity (73.8 kW) and
branching 7k (2.1kW) indoor unit at the 1st branch
Main pipe diameter(22 HP outdoor unit): Ø28.58(Low pressure
gas pipe), Ø15.88(Liquid pipe), Ø22.2(High pressure gas pipe)
Pipe diameter between 1st and 2nd branch (71.7kW indoor units):
Ø34.9(Gas pipe) Ø19.05(Liquid pipe) in conformity with down-
ward indoor units.
Since the main pipe diameter of 22HP outdoor unit is
Ø28.58(Low pressure gas pipe), Ø15.88(Liquid pipe), Ø22.2(High
pressure gas pipe) is used as the main pipe and the connection
pipe between 1st and 2nd branch.
!
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.
• If want U type, bending R
is more than 200 mm.
!
500mm or more 500mm or more