LG MULTI V WATER 5 ARW Series User Manual

74 | LIMITS / PLACEMENT
MULTI V Water 5 Source Unit Engineering Manual
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WSU
Capacity
(ton)
Pipe diameter when equivalent pipe length
from WSU to farthest IDU is <295 ft.
Pipe diameter when equivalent pipe length
from WSU to farthest IDU is >295 ft.
Liquid Pipe
(inches OD)
Low Pressure Vapor
Pipe (inches OD)
High Pressure Vapor
Pipe (inches OD)
Liquid Pipe
(inches OD)
Low Pressure Vapor
Pipe (inches OD)
High Pressure Vapor
Pipe (inches OD)
6 3/8 7/8 3/4 1/2 7/8 3/4
8 3/8 7/8 3/4 1/2 1-1/8 3/4
10 1/2 1-1/8 3/4 5/8 1-1/8 3/4
12 1/2 1-1/8 3/4 5/8 1-1/8 3/4
14 1/2 1-1/8 3/4 5/8 1-1/8 3/4
16 1/2 1-1/8 3/4 5/8 1-1/8 3/4
18 3/4 1-3/8 1-1/8 7/8 1-3/8 1-1/8
20 3/4 1-3/8 1-1/8 7/8 1-3/8 1-1/8
24 3/4 1-3/8 1-1/8 7/8 1-3/8 1-1/8
28 3/4 1-3/8 1-1/8 7/8 1-3/8 1-1/8
30 3/4 1-5/8 1-3/8 7/8 1-5/8 1-3/8
32 3/4 1-5/8 1-3/8 7/8 1-5/8 1-3/8
36 3/4 1-5/8 1-3/8 7/8 1-5/8 1-3/8
40 3/4 1-5/8 1-3/8 7/8 1-5/8 1-3/8
48 3/4 1-5/8 1-3/8 7/8 1-5/8 1-3/8
Table 27: Main Pipe (A) Diameter from Water Source Unit to First Y-branch.
Downstream IDU total capacity (Btu/h) Liquid pipe (inches OD)
Vapor pipe (inches OD)
Low pressure High pressure
≤19,100 1/4 1/2 3/8
<54,600 3/8 5/8 1/2
<76,400 3/8 3/4 5/8
<112,600 3/8 7/8 3/4
<160,400 1/2 1-1/8 7/8
<242,300 5/8 1-1/8 1-1/8
<354,900 3/4 1-3/8 1-1/8
≥354,900 3/4 1-5/8 1-3/8
Table 28: Refrigerant Pipe (B) Diameter between Y-branches and Y-branches / Heat Recovery Unit / Headers.
Table 29: Indoor Unit Connecting Pipe from Branch (C).
Indoor Unit Capacity
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
PIPING LIMITATIONS
For Systems Designed for Heat Recovery 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.

LG MULTI V WATER 5 ARW Series Specifications

General

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