Sizing The Circulation Pump - Viessmann Vitosol 100-FM Technical Manual

Information regarding design and operation
Flow rate
(total collector area)
l/h
850
875
900
925
950
975
1000
Range between 0.4 and 0.7 m/s flow velocity

13.8 Sizing the circulation pump

If the flow rate and pressure drop of the entire solar thermal system
are known, the pump can be selected on the basis of the pump
curve.
Viessmann supplies the Solar-Divicon and a separate solar pump
assembly to simplify the installation and the selection of pumps and
safety equipment. For construction and specification see chapter
"Installation accessories".
Absorber area in m 2
2
3
4
5
6
7
8
9
10
12
14
16
18
20
25
30
35
40
50
60
70
80
Use of type PS10 or P10, with a residual head of 150 mbar/15 kPa (≙ 1.5 m)
Use of type PS20 or P20, with a residual head of 260 mbar/26 kPa (≙ 2.6 m)
Information regarding solar thermal systems with Vitosolic
Pumps with a power consumption of more than 190 W, in conjunc-
tion with a Vitosolic solar control unit, must be connected via an
additional relay (on site).
VITOSOL
Pressure drop per m pipe length (including valves) in mbar/m / kPa/m
Pipe dimensions
DN10 DN13
Dimensions
12 x 1 15 x 1
Specific flow rate in l/(hm
25 30
Low flow High flow operation
operation
Flow rate in l/min
0.83
1.25
1.67
2.08
2.50
2.92
3.33
3.75
4.17
5.00
5.83
6.67
7.50
8.33
10.42
12.50
14.58
16.67
20.83
25.00
29.17
33.33
(cont.)
DN16
18 x 1
Note
The Solar-Divicon and the solar pump assembly are unsuitable for
direct contact with swimming pool water.
2 )
35 40
1.00 1.17 1.33
1.50 1.75 2.00
2.00 2.33 2.67
2.50 2.92 3.33
3.00 3.50 4.00
3.50 4.08 4.67
4.00 4.67 5.33
4.50 5.25 6.00
5.00 5.83 6.67
6.60 7.00 8.00
7.00 8.17 9.33
8.00 9.33 10.67
9.00 10.50 12.00
10.00 11.67 13.33
12.50 14.58 16.67
15.00 17.50 20.00
17.50 20.42 23.33
20.00 23.33 26.67
25.00 29.17 33.33
30.00 35.00 —
35.00 — —
— — —
DN20 DN25
22 x 1 28 x 1.5
7.2/0.72
7.6/0.76
8.0/0.80
8.4/0.84
8.8/0.88
9.2/0.92
9.6/0.96
50 60 80
1.67 2.00
2.50 3.00
3.33 4.00
4.17 5.00
5.00 6.00
5.83 7.00
6.67 8.00
7.50 9.00
8.33 10.00
10.00 12.00
11.67 14.00
13.33 16.00
15.00 18.00
16.67 20.00
20.83 25.00
25.00 30.00
29.17 35.00
33.33 —
— —
— —
— —
— —
VIESMANN
2.5/0.25
2.6/0.26
2.8/0.28
2.9/0.29
3.0/0.30
3.2/0.32
3.4/0.34
2.67
4.00
5.33
6.67
8.00
9.33
10.67
12.00
13.33
16.00
18.67
21.33
13
24.00
26.67
33.33
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