LG MULTI V S ARUN048GSS4 - Selecting the Refrigerant Piping

32
MULTI V S System Installation Manual
Due to our policy of continuous product innovation, some specifications may change without notification.
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IDU: Indoor Units.
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Y-branches.
B: Branch Piping.
C: Branch Piping to Indoor Unit (IDU).
Selecting the Refrigerant Piping
• Indoor units should be installed at a lower
position than the Header.
• Y-branch pipes cannot be used after
Headers.
• Install the Header so that the pipe dis-
tances between the between the con-
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differences in pipe distances can cause in-
door unit performances to fluctuate.
• $OZD\VUHIHUHQFHWKH/$760XOWL9VRIWZDUH
report.
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3.0 Ø3/8 Ø5/8
4.0 Ø3/8 Ø5/8
4.4 Ø3/8 Ø3/4
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1
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 Ø1/4 Ø1/2
 Ø3/8 Ø5/8
 Ø3/8 Ø3/4
Table 20: 6L]HRI0DLQ3LSH$)URP6SDFH,,8QLWWR<EUDQFKHV
Indoor Unit Capacity
1
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 1/4Ø 1/2Ø
 3/8Ø 5/8Ø
 3/8Ø 3/4Ø
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 Ø3/8 (liquid) and Ø5/8 (vapor).
Table 21: Size of Branch Piping (B) to Branch Piping (B).
Table 22: Size of Branch Piping to Indoor Unit (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 Ø3/8 (liquid) and Ø5/8 (vapor).
Vapor Pipe
Main Pipe
Liquid Pipe
Branch Piping
IDU
IDUIDUIDU
C
IDU
IDU
IDU
CCC
CCC
C
Multi V S Unit
A
B
Branch Piping
B
Header
Header
REFRIGERANT PIPING CONNECTIONS
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