LG ARUN115DT2 Installation Manual page 34

Refrigerant piping installation
WARNING
When the equivalent length between the outdoor unit and a indoor unit is 90 m(295 ft) or more, the size of
main pipes (Liquid pipe and Gas pipe) must be increased one grade.
Gas pipe
8HP .....................................Ø19.05(3/4 inch) ¡ Ø22.2(7/8 inch)
10HP. ..................................Ø22.2(7/8 inch) ¡ Ø25.4(1 inch)
12, 14HP ..............................Ø28.58(11/8 inch) ¡ Not increased
16, 18, 20, 22HP ................Ø28.58(11/8 inch) ¡ Ø31.8(11/4 inch)
24HP ...................................Ø34.9(1-3/8 inch) ¡ Not increased
26, 28, 30, 32HP .................Ø34.9(1-3/8) ¡ Ø38.1(11/2 inch)
7.1.5 Indoor Unit Connection
➲ Indoor Unit connecting pipe from branch (a,b,c,d,e,f)
Indoor Unit capacity [kW(Btu/h)]
≤ 5.6(19,100)
< 16.0(54,600)
< 22.4(76,400)
34 Outdoor Unit
Liquid pipe
8, 10HP ...............................Ø9.52(3/8 inch) ¡ Ø12.7(1/2 inch)
12, 14, 16HP. ......................Ø12.7(1/2 inch) ¡ Ø15.88(5/8 inch)
18, 20, 22, 24HP .................Ø15.88(5/8 inch) ¡ Ø19.05(3/4 inch)
26, 28, 30, 32 ......................Ø19.05(3/4 inch) ¡ Ø22.2(7/8 inch)
Liquid pipe
[mm(inch)] [mm(inch)]
Ø6.35(1/4)
Ø9.52(3/8) Ø15.88(5/8)
Ø9.52(3/8) Ø19.05(3/4)
Gas pipe
Ø12.7(1/2)