Installation, operation and maintenance instructions - DualSun XXXM
–
60
–
3BBP
V1.2
–
March 2020
Page
36
sur
41
b.
Direct pool heating system
For direct pool heating systems, it is recommended to use PVC pressure pipes with anti-UV treatment. For aesthetic
reasons, it is possible to paint the PVC pipes: in this case, use a good quality paint, anti-UV if possible.
5.1.3.2
Selecting the hydraulic transfer lines diameter
The diameters shown in the following tables are indicative for standard installations. For more complex installations,
the required diameter should be calculated according to the pressure losses of the solar field and the pipes.
a.
Pressurised system
–
DHW
–
Nominal flow rate = 32 L/h/panel
Number of strings
1
2
3
4
5
6
7
8
9
10
Panel
s per stri
ng
1
1
2
3
4
5
6
7
8
9
10
2
2
4
6
8
10
12
14
16
18
20
3
3
6
9
12
15
18
21
24
27
30
4
4
8
12
16
20
24
28
32
36
40
5
5
10
15
20
25
30
35
40
45
50
6
6
12
18
24
30
36
42
48
54
60
DN multilayer
DN16 DN20 DN26 DN32 DN40 DN50
Number of strings
1
2
3
4
5
6
7
8
9
10
Panel
s per stri
ng
1
1
2
3
4
5
6
7
8
9
10
2
2
4
6
8
10
12
14
16
18
20
3
3
6
9
12
15
18
21
24
27
30
4
4
8
12
16
20
24
28
32
36
40
5
5
10
15
20
25
30
35
40
45
50
6
6
12
18
24
30
36
42
48
54
60
DN Copper
DN14 DN18 DN22 DN28 DN32 DN42
Number of strings
1
2
3
4
5
6
7
8
9
10
Panel
s per stri
ng
1
1
2
3
4
5
6
7
8
9
10
2
2
4
6
8
10
12
14
16
18
20
3
3
6
9
12
15
18
21
24
27
30
4
4
8
12
16
20
24
28
32
36
40
5
5
10
15
20
25
30
35
40
45
50
6
6
12
18
24
30
36
42
48
54
60
DN Stainless steel DN12 DN16 DN20 DN25 DN32 DN40
