Haier AV08NMSETA Service Manual page 32

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