Refrigerant Piping System - LG ARUN040LSS0 Installation Manual

Refrigerant piping system

Y branch method
Example : 5 Indoor Units connected
Ⓐ : Outdoor Unit
Ⓑ : 1st branch (Y branch)
Ⓒ : Indoor Units
Total pipe length = A+B+C+D+a+b+c+d+e ≤ 300m
Longest pipe length
L
A+B+C+D+e ≤ 150m
Longest pipe length after 1st branch
l
B+C+D+e ≤ 40m
Difference in height (Outdoor Unit ↔ Indoor Unit)
H
H ≤ 50m (40m : Outdoor Unit is lower than Indoor Units)
Difference in height (Indoor Unit ↔ Indoor Unit)
h
h ≤ 15m
• * : Assume equivalent pipe length of Y branch to be 0.5m, that of header to be 1m,
calculation purpose
PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT
www.lgcomfortcooling.co.uk
L150m
l 40m
Equivalent pipe length(*)
A+B+C+D+e ≤ 175m
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