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MULTI V IV System Installation Manual
Due to our policy of continuous product innovation, some specifications may change without notification.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Multi-frame Connectors (for heat recovery outdoor unit connection)
Two outdoor units
Three outdoor units
HEAT RECOVERY ACCESSORIES
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
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