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Installation Manual 33
ENGLISH
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
Ú 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(1-1/8 inch) ’ Not increased
16, 18, 20, 22HP ........Ø28.58(1-1/8 inch) ’ Ø31.8(1-1/4 inch)
24HP ...........................Ø34.9(1-3/8 inch) ’ Not increased
26, 28, 30, 32HP .........Ø34.9(1-3/8) ’ Ø38.1(1-1/2 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)]
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