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Piping Limitations
• The minimum number of connected and operating indoor units to a Multi V Water Mini system is one (1), taking into consideration of the
minimum combination ratio.
• The maximum number of indoor units on a Multi V Water Mini ARWN053GA2 heat pump system is nine (9).
One of the most critical elements of a Multi V Water Mini system is the refrigerant piping. The table below lists pipe length limits that must be
followed in the design of a Multi V Water Mini refrigerant pipe system:
Table 27: Multi V Water Mini Liquid Refrigerant Pipe Design Limitations.
Pipe Length
(ELF = Equivalent Length of pipe
in Feet)
Elevation (All Elevation Limitations
are Measured in Actual Feet)
Table 28: Equivalent Piping Length for Y-branches, Headers, and Typical Refrigeration Elbows.
Component
1/4
3/8
Elbow (ft.)
0.5
0.6
Y-branch (ft.)
1
Header (ft.)
Kit contains two Y-branches: one for liquid and one for vapor.
1
REFRIGERANT PIPING DESIGN
Longest total equivalent piping length
Longest distance from water source unit to indoor unit
Distance between fittings and indoor units
Distance between fittings and Y-branches
Distance between two Y-branches
Distance between Header and indoor units
Minimum distance between indoor unit to any Y-branch
Maximum distance between first Y-branch to farthest
indoor unit
If water source unit is above or below indoor unit
Between any two indoor units
1/2
5/8
3/4
7/8
0.7
0.8
1.2
1.3
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.
3 feet from indoor unit to Y-branch
Size (Inches)
1
1-1/8
1-1/4
1-3/8
1.5
1.6
1.8
2.0
1.6
3.3
Piping Limitations
≤475.7 feet
230 feet (Actual)
295.2 feet (Equivalent)
≥20 inches
≥20 inches
≥20 inches
≥20 inches
≤ 131 feet
≤ 98.4 feet
≤ 49 feet
1-1/2
1-5/8
1-3/4
2-1/8
2.1
2.3
2.5
2.8
LIMITS / PL ACEMENT | 59
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