Sizing The Circulation Pump - Viessmann VITOSOL 100-F SV Technical Manual

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

18.9 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".
2
Absorber area in m
18
2
3
4
5
6
7
8
9
10
12
14
16
18
20
25
30
35
40
50
60
70
80
Information regarding solar thermal systems with Vitosolic
Pumps with a power consumption of more than 190 W, in conjunction
with a Vitosolic solar control unit, must be connected via an additional
relay (on site).
VIESMANN
150
Pressure drop per m pipe length (including valves) in mbar/m / kPa/m
Pipe dimension
DN 10
Dimensions
12 x 1
Specific flow rate in l/(hm
25
Low flow
operation
Flow rate in l/min
10.42
12.50
14.58
16.67
20.83
25.00
29.17
33.33
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)
(cont.)
DN 13 DN 16
15 x 1 18 x 1
Note
The Solar-Divicon and the solar pump assembly are unsuitable for
direct contact with swimming pool water.
2
)
30 35
High flow operation
0.83 1.00 1.17
1.25 1.50 1.75
1.67 2.00 2.33
2.08 2.50 2.92
2.50 3.00 3.50
2.92 3.50 4.08
3.33 4.00 4.67
3.75 4.50 5.25
4.17 5.00 5.83
5.00 6.60 7.00
5.83 7.00 8.17
6.67 8.00 9.33
7.50 9.00 10.50
8.33 10.00 11.67
12.50 14.58
15.00 17.50
17.50 20.42
20.00 23.33
25.00 29.17
30.00 35.00
35.00 —
— —
DN20
22 x 1
7.6/0.76
8.0/0.80
8.4/0.84
8.8/0.88
9.2/0.92
9.6/0.96
40 50 60
1.33 1.67
2.00 2.50
2.67 3.33
3.33 4.17
4.00 5.00
4.67 5.83
5.33 6.67
6.00 7.50
6.67 8.33
8.00 10.00
9.33 11.67
10.67 13.33
12.00 15.00
13.33 16.67
16.67 20.83
20.00 25.00
23.33 29.17
26.67 33.33
33.33 —
— —
— —
— —
DN25
28 x 1.5
2.6/0.26
2.8/0.28
2.9/0.29
3.0/0.30
3.2/0.32
3.4/0.34
80
2.00 2.67
3.00 4.00
4.00 5.33
5.00 6.67
6.00 8.00
7.00 9.33
8.00 10.67
9.00 12.00
10.00 13.33
12.00 16.00
14.00 18.67
16.00 21.33
18.00 24.00
20.00 26.67
25.00 33.33
30.00 —
35.00 —
— —
— —
— —
— —
— —
VITOSOL