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Product Data
Due to our policy of continuous product innovation, some specifications may change without notification.
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Water Source Unit Y-branch Kits for Heat Pump Systems
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
• LG water source 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.
Y-branch
Kit
Y-branch Type
Port Identier
1 2 3 4 5 6 7 8 9
ARCNN21
Liquid
AJR67613702
— 3/4 5/8 1/2 5/8 3/8 1/2 5/8 —
Vapor
AJR72963604
1-1/8 1-1/4 1-3/8 7/8 1-1/8 — 1-1/8 — —
ARCNN31
Liquid
AJR67613704
— 7/8 3/4 3/4 — — 5/8 1/2 —
Vapor
AJR54072908
1-1/2 1-5/8 1-3/8 1-3/8 — — 1-1/8 — —
Y-branch Kit Qty/Kit Reducer Type
Reducer Diameters (in)
10 11 12 13 Length
ARCNN21 4
Liquid
7/8 ID 3/8 OD — — 2-3/4
5/8 OD — 1/2 ID 3/8 ID 4-3/8
Vapor
1-5/8 ID 1-1/2 ID — 1-3/8 OD 5-1/8
1-1/8 OD — 7/8 ID 3/4 ID 4-3/4
ARCNN31 4
Liquid
3/4 ID — 5/8 ID 1/2 ID 4-3/8
1/2 OD — 3/8 ID 1/4 ID 4-3/8
Vapor
1-5/8 ID — 1-3/8 OD — 4-7/8
1-1/8 OD — 7/8 ID 3/4 ID 4-3/4
Y-branch
Kit
Y-branch Type
Dimension
A B C
ARCNN21
Liquid
AJR67613702
3-1/4 12-3/8 13-1/16
Vapor
AJR72963604
4-3/8 16-1/16 16-3/8
ARCNN31
Liquid
AJR67613704
3-1/4 11-1/16 13-1/8
Vapor
AJR54072908
4-3/8 13-7/8 16
Table 19: Y-branch Connection Diameters (inches, ID).
Figure 4: Y-branch Connectors (See Table 19).
Figure 5: Y-branch dimensions (See Table 20).
Table 20: Y-branch Dimensions (inches).
Table 21: Y-branch Reducer Diameters (inches).Figure 6: Reducer Components
(See Table 21).
Material
Copper
Design Pressure
550 psig
Table 22: Fitting Properties.
Table 23: Insulation Jacket Properties.
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