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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 rst 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.
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