36
Outdoor Unit
Refrigerant piping installation
➲
Refrigerant pipe diameter from branch to branch (B,C)
➲
Total pipe length = A+B+C+a+b+c+d+e
≤
1,000m
Longest pipe length
* Equivalent pipe length
A+B+b
≤
150m
A+B+b
≤
175m
Longest pipe length after 1st branch
B+b
≤
40m
Difference in height(Outdoor Unit
↔
Indoor Unit)
H
≤
100m
Difference in height (Indoor Unit
↔
Indoor Unit)
h
≤
15m
Difference in height (Outdoor Unit
↔
Outdoor Unit)
h1
≤
5m
L
l
H
h
h1
WARNING
It is recommended that difference of piping length for pipes connected to the Indoor Unit is
minimized. Performance difference between Indoor Units may occur.
Downward Indoor Unit total capacity
[kW(Btu/h)]
≤
5.6(19,100)
Ø6.35(1/4)
Ø12.7(1/2)
<16(54,600)
Ø9.52(3/8)
Ø15.88(5/8)
<22.4(76,400)
Ø9.52(3/8)
Ø19.05(3/4)
< 33(112,600)
Ø9.52(3/8)
Ø22.2(7/8)
< 47(160,400)
Ø12.7(1/2)
Ø28.58(1
1
/
8
)
< 71(242,300)
Ø15.88(5/8)
Ø28.58(1
1
/
8
)
< 104(354,900)
Ø19.05(3/4)
Ø34.9(1
3
/
8
)
104(354,900)
≤
Ø19.05(3/4)
Ø41.3(1
5
/
8
)
Liquid pipe
[mm(inch)]
Gas pipe
[mm(inch)]
• * : Assume equivalent pipe length of Y branch to be 0.5m, that of header to be 1m, calculation purpose
• Indoor Unit should be installed at lower position than the header.
Upward Outdoor Unit
total capacity [HP]
5
Ø0.52(3/8)
Ø15.88(5/8)
6, 8
Ø9.52(3/8)
Ø19.05(3/4)
10
Ø9.52(3/8)
Ø22.2(7/8)
12~16
Ø12.7(1/2)
Ø28.58(1
1
/
8
)
18~22
Ø15.88(5/8)
Ø28.58(1
1
/
8
)
24
Ø15.88(5/8)
Ø34.9(1
3
/
8
)
26~34
Ø19.05(3/4)
Ø34.9(1
3
/
8
)
36~48
Ø19.05(3/4)
Ø41.3(1
5
/
8
)
Liquid pipe
[mm(inch)]
Gas pipe
[mm(inch)]
Upward Outdoor Unit
total capacity [HP]
18, 20, 22
Ø15.88(5/8)
Ø28.58(1
1
/
8
)
24
Ø19.05(3/4)
Ø34.9(1
3
/
8
)
26, 28, 30, 32
Ø19.05(3/4)
Ø34.9(1
3
/
8
)
Liquid pipe
[mm(inch)]
Gas pipe
[mm(inch)]
Upward Outdoor Unit
total capacity [HP]
6, 8
Ø9.52(3/8)
Ø19.05(3/4)
10
Ø9.52(3/8)
Ø22.2(7/8)
12, 14, 16
Ø12.7(1/2)
Ø28.58(1
1
/
8
)
Liquid pipe
[mm(inch)]
Gas pipe
[mm(inch)]
A
E
F
