40
MULTI V Water 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.
CUT SHEETS
• Design pressure is 550 psig.
• All dimensions in inches.
Length tolerance ±1/4 inch.
• Images are not to scale.
Indoor Unit Y-branch Kits for Heat Recovery Systems
• LG indoor unit Y-branch fittings must be used with
LG systems and be properly installed following the
instructions in the applicable LG manual. Field-
supplied branch fittings are not permitted.
• Kit components must be kept free of debris and dry
before installation.
• All Y-branch Kits include a clam shell, peel-and-
stick insulation jacket.
Material
Polyolefin Foam
UL94 Flame Classication
HF-1
Density
1.84 lbs./ft.
3
Thermal Conductivity
0.0208 Btu/h/ft. ºF
Thickness
1/2 inch
Model Fitting Capacity
ARBLB01621
≤72,000 connected capacity
ARBLB03321
≤144,000 connected capacity
ARBLB07121
≤336,000 connected capacity
ARBLB14521
≤432,000 connected capacity
Table 31: Nominal Capacity Range (Btu/h).
Table 32: Insulation Jacket Properties.
s
Models
Low-Pressure Vapor Pipe High-Pressure Vapor Pipe
Liquid pipe
ARBLB01621
ARBLB03321
ARBLB07121
ARBLB14521
I.D. 5/8
I.D. 5/8
I.D. 5/8
16-1/4
15-3/8
I.D. 3/4
I.D. 3/4
I.D. 3/4
I.D. 3/4
O.D. 5/8
I.D. 1/2
I.D. 5/8
I.D. 5/8
I.D. 5/8
I.D. 5/8
I.D. 5/8
I.D. 5/8
I.D. 1/2
I.D. 1/2
I.D. 1/2
I.D. 1/2
I.D. 1/2
I.D. 1/2
I.D. 1/2
I.D. 1/2
I.D. 1/2
I.D. 1/2
I.D. 1/2
I.D. 1/2
I.D. 1/2
I.D. 1/2
I.D. 1/2
I.D. 1/2
O.D. 1/2
O.D. 1/2
O.D. 1/2
O.D. 1/2
I.D 1/2
I.D. 1/2
O.D. 1/2
I.D. 1/2
I.D. 1/2
I.D. 1/2
I.D. 1/2
11-1/2
11-1/16
11-1/2
11-1/16
2-15/16
2-15/16
2-15/16
2-15/16
2-3/4
2-3/4
2-3/4
2-3/4
2-3/42-3/4
2-3/4
2-3/4
2-3/4
I.D. 5/8
I.D. 5/8
I.D. 1
I.D. 1
I.D. 1
I.D. 1
I.D. 1
O.D. 1
O.D. 1
I.D. 1
I.D. 1
I.D. 1
O.D. 1
3-3/16
4-3/8
4-3/8
4-3/8
4-3/84-3/8
4-3/8
4-3/8
13-1/16
12-5/8
18-9/16
20-3/8
4-15/16
14-5/8
15-1/2
3-5/16
3-5/16
5-1/8
I.D. 5/8
I.D. 1-5/8
I.D.
1-5/8
I.D. 1-5/8
I.D. 1-1/2
I.D. 1-1/2
I.D. 1-1/2
O.D. 1-1/2
O.D. 5/8
1
2
2
3
3
2
2
3
3
2
3
3
3
14-13/16
15-15/16
4-3/4 4-3/4
4-3/4
4-3/4
4-3/4
3-9/16
3-9/16
I.D. 5/8
I.D. 5/8
2
3
1
2
1 3
3
16-3/8
17-1/2
O.D. 5/8
I.D. 5/8
I.D. 3/4
I.D. 3/4
I.D. 3/4
I.D. 3/4
I.D. 3/4
I.D. 3/4
I.D. 3/4
I.D. 3/4
I.D. 3/4
I.D. 3/4
I.D. 3/4
I.D. 3/4
I.D. 5/8
I.D. 5/8
I.D. 3/4
I.D. 3/4
I.D. 3/4
O.D. 3/4
O.D. 3/4
O.D. 3/4
O.D. 3/4
O.D. 3/4
O.D. 3/4
O.D. 3/4
3-3/16
3-3/16
2
3
3
3
3
3
3 2
2
2
3 2
3
3
3
1
2
2
1
2 3 3
2
1 2
I.D. 5/8
14-11/16
13-13/16
O.D. 5/8
17-1/2
16-9/16
3-13/16
3-13/16
3-13/16
3-13/16
I.D.
5/8
I.D. 7/8
I.D. 7/8
I.D. 7/8
I.D. 7/8
I.D. 7/8
I.D. 7/8
I.D. 7/8
I.D. 7/8
I.D. 7/8
I.D. 7/8
I.D. 7/8
I.D. 7/8
I.D. 7/8
O.D. 7/8
O.D. 7/8
I.D. 7/8
I.D. 7/8
I.D. 7/8
I.D. 7/8
O.D. 5/8
I.D. 1/4
I.D. 1/4
I.D. 1/4
I.D. 1/4
I.D. 1/4
I.D. 1/4
I.D. 1/4
1
1
1
1
15
16-1/8
I.D. 5/8
I.D. 5/8
I.D. 5/8
17-7/8
19-3/8
4-3/8
I.D. 1-3/8
I.D. 1-3/8
I.D. 1-3/8
I.D. 1-3/8
I.D. 1-3/8
O.D. 1-3/8
I.D. 1-1/8
I.D. 1-1/8
I.D. 1-1/8
I.D. 1-1/8
I.D. 1-1/8
I.D. 1-1/8
I.D. 1-1/8
I.D. 1-1/8
I.D. 1-1/8
O.D. 1-1/8
I.D. 1-1/8
I.D. 1-1/4
O.D. 1-1/4
I.D. 1-1/4
I.D. 1-1/4
I.D. 1-1/4
I.D. 1-1/4
I.D. 3/8
I.D. 3/8
I.D. 3/8
I.D. 3/8
I.D. 3/4
I.D. 3/8
I.D. 3/8
I.D. 3/8
I.D. 3/8
I.D. 3/8
I.D. 3/8
I.D. 3/8
I.D. 3/8
I.D. 3/8
I.D. 3/8
I.D. 3/8
I.D. 3/8
O.D. 3/8
AJR72963601
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AJR72963602AJR54072902
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AJR54072905
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