LG ARUV025GSD0 Engineering Product Data Book page 46

7. Refrigerant Piping System
7.2 Refrigerant piping system
Y branch method
Example : 5 Indoor Units connected
Ⓐ : Outdoor Unit
Ⓑ : 1st branch (Y branch)
Ⓒ : Indoor Units
Outdoor unit capacity (HP)
Total pipe length (m)
T
A+B+C+D+a+b+c+d+e
Longest pipe length (m) (Equivalent pipe length)
L
A+B+C+D+e
Longest pipe length after 1st branch (m)
B+C+D+e
Difference in height (m) (Outdoor Unit ÷ Indoor Unit)
H
H
Difference in height (m) (Indoor Unit ÷ Indoor Unit)
h
h
Refrigerant pipe diameter from outdoor unit to first branch. (A)
Outdoor unit total capacity (HP)
2.5
3
4
Refrigerant pipe diameter from branch to branch (B,C,D)
Downward Indoor Unit
total capacity [kW(Btu/h)]
≤ 5.6(19,100)
< 16.0(54,600)
≤ 22.4(76,400)
< 36.4(124,200)
Liquid pipe [mm(inch)]
Ø9.52(3/8)
Ø9.52(3/8)
Ø9.52(3/8)
Liquid pipe [mm(inch)]
Ø6.35(1/4)
Ø9.52(3/8)
Ø9.52(3/8)
Ø9.52(3/8)
L
l
2.5 3 4
50 80 85
30 40 50
20 30 30
15 15 15
7.5 7.5 7.5
Gas pipe [mm(inch)]
Ø15.88(5/8)
Ø15.88(5/8)
Ø15.88(5/8)
Gas pipe [mm(inch)]
Ø12.7(1/2)
Ø15.88(5/8)
Ø19.05(3/4)
Ø22.2(7/8)
R410A(50/60Hz)
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