LG MULTI V IV ARUN072BTE4 - Page 123

125
Installation
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Pipe Connections—Connecting Branch Pipes (Heat Recovery)
Install the branch pipe between the outdoor units so that the outlet pipe is parallel with the surface.
Combination specification
Combination specification
Low-Pressure Vapor Pipe Liquid Pipe High-Pressure Vapor Pipe
Multi-Frame
Connector
ARCNB21
ARCNB21
ARCNB31
Liquid Pipe
Unit: inch
Unit: inch
A
B
To
outdoor unitTo
branch piping or indoor unit
A
B
Viewed from point A
in direction of arrow
Within ±10º
Low-Pressure Vapor Pipe High-Pressure Vapor Pipe
B
B
Facing up
Facing down
Within ±3°Within ±3°
A
A
Multi-Frame
Connector
5-1/8
16-3/8
4.2
I.D. 1-1/8 I.D. 1-1/8
I.D. 1-3/8
I.D.
1-5/8
I.D. 1-1/2
O.D. 1-3/8
I.D. 1-1/4
I.D.
7/8
I.D.
1-1/8
4-3/8
4-3/4
I.D. 3/4
I.D. 7/8
O.D. 1-1/8
I.D.
5/8
I.D.
5/8
I.D. 5/8
I.D.
3/4
I.D. 1/2
I.D. 1/2
I.D. 3/8
13-1/16
2-3/4
12-3/8
I.D. 7/8 O.D. 3/4
3-5/16
I.D. 1/2
4-3/8
O.D. 5/8
I.D. 3/8
O.D. 1
I.D. 7/8
I.D. 3/4
4-3/4
X2
O.D. 3/4
I.D. 5/8
I.D. 1/2
4-3/8
O.D.1
I.D.7/8
3-/16
O.D. 1/2
I.D. 3/8
2-3/4
17-7/8
19-5/16
4-3/8
I.D. 1-1/8
I.D.1-3/8
I.D. 1-1/8
I.D.1-1/4
I.D. 1
I.D. 1-1/4
I.D.1
I.D. 1-1/8
I.D.1-1/4
5-1/8
16-3/8
4.2
I.D. 1-1/8 I.D. 1-1/8
I.D. 1-3/8
I.D.
1-5/8
I.D. 1-1/2
O.D.
1-3/8
I.D. 1-1/4
I.D.
7/8
I.D.
1-1/8
4-3/8
4-3/4
I.D. 3/4
I.D. 7/8
O.D. 1-1/8
I.D.
5/8
I.D.
5/8
I.D. 5/8
I.D. 3/4
I.D. 1/2
I.D. 1/2
I.D. 3/8
13-1/16
2-3/4
12-3/8
I.D. 7/8 O.D. 3/4
3-5/16
I.D. 1/2
4-3/8
O.D. 5/8
I.D. 3/8
O.D. 1
I.D. 7/8
I.D. 3/4
4-3/4
X2
O.D. 3/4
I.D. 5/8
I.D.1/2
4-3/8
O.D.1
I.D.7/8
3-/16
O.D. 1/2
I.D. 3/8
2-3/4
17-7/8
19-5/16
4-3/8
I.D. 1-1/8
I.D.1-3/8
I.D. 1-1/8
I.D.1-1/4
I.D. 1
I.D. 1-1/4
I.D.1
I.D. 1-1/8
I.D.1-1/4
16
4-3/8
4-15/16
13-15/16
I.D. 1-3/8
I.D. 1-5/8
I.D. 1-1/2
I.D. 1-5/8
O.D. 1-3/8
I.D. 1-1/8
I.D. 1-3/8
4-3/4
I.D.
3/4
I.D. 7/8
O.D. 1-1/8
I.D. 3/8
3-5/16
I.D.
5/8
I.D.
3/4
I.D.
3/4
I.D.
1/2
I.D.
7/8
13-3/16
11-1/16
O.D. 3/4
I.D. 5/8
O.D. 1/2
I.D. 1/2
I.D. 1/4
X2
4-3/8 4-3/8
18-9/16
20-3/8
4-15/16
I.D. 1-5/8
I.D. 1-1/2
I.D. 1-1/2
I.D. 1-3/8
I.D. 1-3/8
I.D. 1-3/8
I.D. 1-1/8
5-1/8
I.D.1/2
I.D.
3/4
I.D.7/8
I.D. 1-5/8
I.D.1-1/2
I.D.1-5/8
O.D. 1-3/8
O.D. 1-1/2
O.D. 1-1/8
O.D. 5/8
3-9/16
2-3/4
4-3/4
4-3/4
I.D. 3/4
I.D.5/8
O.D. 7/8
I.D. 1-1/8
I.D. 7/8
Blow nitrogen while
brazing
Do not cut this pipe shorter
than 2-3/4 inches long
Use caution when installing the branch pipe vertically between the outdoor units. Improper installation can cause uneven refrigerant distribution
between the outdoor units, and may lead to compressor burn and reduced system capacity.
Note:
REFRIGERANT PIPING DESIGN
For Dual-Frame Heat Pump Systems
For Triple-Frame Heat Pump Systems