LG MULTI V WATER 5 ARW Series User Manual

LIMITS / PLACEMENT | 69
Piping Limitations and Placement Considerations
Due to our policy of continuous product innovation, some specications may change without notication.
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1
For the first branch pipe, use the branch pipe that matches main pipe A diameter.
Downstream Total Capacity of
IDUs (Btu/h)
1
Liquid pipe
(inches OD)
Vapor pipe
(inches OD)
≤19,100 1/4 1/2
≤54,600 3/8 5/8
≤76,400 3/8 3/4
≤112,600 3/8 7/8
≤160,400 1/2 1-1/8
≤242,300 5/8 1-1/8
≤354,900 3/4 1-3/8
>354,900 3/4 1-5/8
Table 22: Refrigerant Pipe Diameter (B) from Y-branch to Y-branch /
Header.
Indoor Unit Capacity
1
Liquid pipe (inch-
es OD)
Vapor pipe (inches OD)
≤19,100 1/4 1/2
≤54,600 3/8 5/8
≤76,400 3/8 3/4
Table 23: Indoor Unit Connecting Pipe from Branch (C).
1
9,600-24,200 Btu/h 4-way 3 feet x 3 feet Cassette and 15,400-24,200 Btu/h
High Static Ducted indoor units have 3/8 in (liquid) and 5/8 in (vapor).
Figure 15: Heat Pump Triple-Frame Connections.
Triple-Frame Heat Pump Water Source Unit Connections
• A1, A2, and A3 diameters match the water source unit connection diameters. Main pipe C diameters are sized by LATS.
• For single and dual-frame systems, the pipe size is the same size as the frame connections.
PIPING LIMITATIONS
For Systems Designed for Heat Pump Operation
Following pages present Multi V Water 5 piping limitations and are for illustrative purposes only. Designers MUST use LATS when designing LG VRF
systems.
• Always reference the LATS Multi V software report.
• The largest capacity water source unit must be the main unit in a multi-frame system.
• Main water source unit capacity must be greater than or equal to the sub1 water source unit capacity, and, where applicable, sub1 water
source unit capacity must be greater than or equal to the sub2 water source unit capacity.
• Connection piping from branch to branch cannot exceed the main pipe diameter (A) used by the water source unit.
• Install the header branches so that the pipe distances between the between the connected indoor units are minimized. Large differences in
pipe distances can cause indoor unit performances to fluctuate.
• Y-branches and other header branches cannot be installed downstream of the initial header branch.
• Outdoor unit Y-branches can only be installed in a horizontal or vertical UP configuration. The vertical DOWN configuration is not permitted.

LG MULTI V WATER 5 ARW Series Specifications

General

Brand	LG
Model	MULTI V WATER 5 ARW Series
Category	Heat Pump
Language	English