34
Outdoor Unit
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.
7.1.5 Indoor Unit Connection
➲
Indoor Unit connecting pipe from branch (a,b,c,d,e,f)
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)
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)
Indoor Unit capacity [kW(Btu/h)]
≤
5.6(19,100)
< 16.0(54,600)
< 22.4(76,400)
Ø6.35(1/4)
Ø9.52(3/8)
Ø9.52(3/8)
Ø12.7(1/2)
Ø15.88(5/8)
Ø19.05(3/4)
Liquid pipe
[mm(inch)]
Gas pipe
[mm(inch)]