LG ARUN80LN3 Installation Manual page 32

Pipe connections between indoor and outdoor unit
➲ 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)
< 33.6(114,700)
< 50.4(172,000)
< 67.2(229,400)
< 72.8(248.500)
< 100.8(344,000)
< 173.6(592,500)
< 184.8(630,700)
< 224.0(764,400)
➲ Total pipe length = A+B+C+D+a+b+c+d+e ≤ 1,000 m
Longest pipe length
L
A+B+C+D+e ≤ 150m(200 m**)
Longest pipe length after 1st branch
B+C+D+e ≤ 40m(90 m**)
Difference in height(Outdoor Unit ↔ Indoor Unit)
H
H ≤ 110m
Difference in height (Indoor Unit ↔ Indoor Unit)
h
h ≤15m
Difference in height (Outdoor Unit ↔ Outdoor Unit)
h1
h1 ≤ 5m
• * : Assume equivalent piping length of Y branch to be 0.5m, that of header to be 1m, calculation purpose.
• ** : To apply Conditional Application
➲ Refrigerant pipe diameter from outdoor unit to first branch. (A)
Outdoor unit
Total capacity
[kW (Btu/h)
16.0~22.4(54,600~76,400)
28.0(95,900)
33.6~44.8(172,000~152,900)
50.4~61.6(172,000~210,600)
67.2(229,400)
72.8~95.2(248,500~324,900)
100.8~168.0(344,000~573,300)
173.6~179.2(592,500~611,600)
184.8~224.0(630,700~764,400)
❈ If available on site, it use this size. Otherwise it can't be increased.
32 Outdoor Unit
Liquid pipe
[mm(inch)]
Ø6.35(1/4)
Ø9.52(3/8)
Ø9.52(3/8)
Ø9.52(3/8)
Ø12.7(1/2)
Ø15.88(5/8)
Ø15.88(5/8)
Ø19.05(3/4)
Ø19.05(3/4)
Ø22.2(7/8)
Ø22.2(7/8)
Equivalent pipe length
*A+B+C+D+e ≤ 175m(225 m**)
Standard Pipe Diameter
Liquid pipe Gas pipe
[mm (inch)] [mm (inch)]
Φ19.05(3/4)
Φ9.52(3/8)
Φ22.2(7/8)
Φ12.7(1/2)
Φ28.58(1 1/8)
Φ15.88(5/8)
Φ34.9(1 3/8)
Φ19.05(3/4)
Φ41.3(1 5/8)
Φ44.5(1 3/4)
Φ22.2(7/8)
Φ53.98(2)
Gas pipe
[mm(inch)]
Ø12.7(1/2)
Ø15.88(5/8)
Ø19.05(3/4)
Ø22.2(7/8)
1
Ø28.58(1 / )
8
1
Ø28.58(1 / )
8
Ø34.9(1 3 / )
8
Ø34.9(1 3 / )
8
5
Ø41.3(1 / )
8
3
Ø44.5(1 / )
4
Ø53.98(2)
Conditional application
(more than 90m from ODU to IDU)
Liquid pipe
[mm (inch)]
Φ12.7(1/2)
Φ15.88(5/8)
Φ19.05(3/4)
Φ22.2(7/8)
Φ25.4(1)
Gas pipe
[mm (inch)]
Φ22.2(7/8)
Φ25.4(1)
Φ28.58(1 1/8)
Φ31.8(1 1/4)
Φ34.9(1 3/8)
Φ38.1(1 1/2)
Φ41.3(1 5/8)
Φ53.98(2)