30
30
Copper pipe selection:
Material
O type pipe: Soft pipe
Pipe diameter (mm)
Ø6.35
Ø9.52
Ø12.7
Ø15.88
Thickness (mm)
0.8
0.8
1.0
1.0
Material
Hard pipe
Pipe diameter (mm)
Ø19.05
Ø22.22
Ø25.4
Ø28.58
Ø31.8
Thickness (mm)
1.0
1.0
1.0
1.0
1.1
2. Pipe b (between branch pipes) diameter:
Total capacity of
connected indoors
Gas pipe Liquid pipe (1) Select in accordance with total capacity connected
(2) Pipe b diameter should not be bigger than main pipe c
If pipe b diameter is larger than main pipe c, please correct
diameter according to either of the following rules:
①
Reduce b diameter to be the same as pipe c
②
Enlarge main pipe c diameter to be the same as pipe b.
(3) If pipe b diameter smaller than pipe a, the pipe b diameter
must be enlarged.
x<16.8kw
15.88
9.52
16.8kw≤x<22.4kw
19.05
9.52
22.4kw≤x<33kw
22.22
9.52
33kw≤x<47kw
28.58
12.7
47kw≤x<71kw
28.58
15.88
71kw≤x<104kw
31.8
19.05
104kw≤x<154kw
38.1
19.05
154kw≤x<182kw
41.3
19.05
x≥182kw
44.5
22.22
3. Main pipe c (between outdoor gather pipe & the first branch pipe) diameter:
Outdoor horse power
Main pipe
Enlarged main pipe
Gas pipe
Liquid pipe
Gas pipe
Liquid pipe
8HP
19.05
9.52
22.22
12.7
10HP
22.22
9.52
25.4
12.7
12HP
25.4
12.7
28.58
15.88
When the farthest length (between outdoor & the farthest indoor) is over 90m (equivalent length), the main pipe
must be enlarged one size.
