LG MULTI V S ARUN048GSS4 - System Using a Header; System Using Y-Branches

30
MULTI V S System Installation Manual
Due to our policy of continuous product innovation, some specifications may change without notification.
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REFRIGERANT PIPING CONNECTIONS
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The following is an example of manual pipe size calculations. Designers are highly encouraged to use LATS instead of manual calculations.
System Using Y-branches
Example: Five (5) indoor units connected
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IDU: Indoor Units.
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B: Y-branch to Y-branch.
C: Y-branch to Indoor Unit.
D: Y-branch to Farthest Indoor Unit.
• $OZD\VUHIHUHQFHWKH/$760XOWL9VRIWZDUHUHSRUW
• See pages 31 - 33 for refrigerant pipe diameter and pipe length
tables.
Ɛ  131 feet
Elevation1 164 feet
Elevation2  49 feet
Length  492 feet
Multi V S Unit
IDU
IDU
IDU
IDU
IDU
D
Y-branch
To Multi V S
Outdoor Unit
To Indoor
Units
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IDU: Indoor Units.
Header.
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C: Header to Indoor Unit.
D: To Farthest Indoor Unit.
System Using a Header
• 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
distances between the connect-
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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.
• See pages 31 - 33 for refrigerant pipe diam-
eter and pipe length tables.
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+HDGHU
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