Sizing The Circulation Pump - Viessmann VITOSOL 200-FM SV2F Design Manual

Solar System Design Guide

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 to simplify the
installation and the selection of pumps and safety
equipment. For construction and specification (see
pages 36 and 37).
USG/min/ft 2
0.0102
(L/h/m 2 )
(25)
USG/min
0.26
(L/min)
(1.0)
Number of
Collectors
1 Collector
0.26 (1.0)
2 Collectors
0.51 (1.9)
3 Collectors 0.77 (2.9)
4 Collectors
1.03 (3.9)
5 Collectors
1.28 (4.9)
6 Collectors
1.54 (5.8)
7 Collectors
1.80 (6.8)
8 Collectors
2.05 (7.8)
9 Collectors
2.31 (8.7)
10 Collectors
2.56 (9.7)
11 Collectors
2.82 (10.7) 3.39 (12.8) 3.95 (15.0) 4.51 (17.1) 5.08 (19.2) 5.64 (21.4) 6.21 (23.5) 6.77 (25.6)
12 Collectors
3.08 (11.7) 3.69 (14.0) 4.31 (16.3) 4.92 (18.6) 5.54 (21.0) 6.16 (23.3) 6.77 (25.6) 7.39 (28.0)
Low Flow
0.0123 0.0143
(30) (35)
0.31 0.36
(1.2) (1.4)
Recommended flow rate for the number of collectors per individual array
0.31 (1.2) 0.36 (1.4)
0.62 (2.3) 0.72 (2.7)
0.92 (3.5) 1.08 (4.1)
1.23 (4.7) 1.44 (5.4)
1.54 (5.8) 1.80 (6.8)
1.85 (7.0) 2.15 (8.2)
2.15 (8.2) 2.51 (9.5)
2.46 (9.3) 2.87 (10.9) 3.28 (12.4) 3.69 (14.0) 4.10 (15.5) 4.51 (17.1) 4.92 (18.6)
2.77 (10.5) 3.23 (12.2) 3.69 (14.0) 4.16 (15.7) 4.62 (17.5) 5.08 (19.2) 5.54 (21.0)
3.08 (11.7) 3.59 (13.6) 4.10 (15.5) 4.62 (17.5) 5.13 (19.4) 5.64 (21.4) 6.16 (23.3)
Use Solar-Divicon DN20B
Use Solar-Divicon DN25B
Note: The Solar-Divicon and the solar pump assembly
are not suitable for direct contact with swimming
pool water.
Specific Flow Rate
High Flow
0.0164 0.0184
(40) (45)
0.41 0.46
(1.6) (1.7)
USG/min (L/min)
0.41 (1.6) 0.46 (1.7)
0.82 (3.1) 0.92 (3.5)
1.23 (4.7) 1.39 (5.2)
1.64 (6.2) 1.85 (7.0)
2.05 (7.8) 2.31 (8.7)
2.46 (9.3) 2.77 (10.5) 3.08 (11.7) 3.39 (12.8) 3.69 (14.0)
2.87 (10.9) 3.23 (12.2) 3.59 (13.6) 3.95 (15.0) 4.31 (16.3)
Note: The table above is only to be used as a reference.
It is important to consider the pressure drop and
flow requirements of all components installed on
the system when sizing or selecting the circulation
pump.
Design and Operation
0.0205 0.0225
(50) (55)
0.51 0.56
(1.9) (2.1)
0.51 (1.9) 0.56 (2.1)
1.03 (3.9) 1.13 (4.3)
1.54 (5.8) 1.69 (6.4)
2.05 (7.8) 2.26 (8.5)
2.56 (9.7) 2.82 (10.7) 3.08 (11.7)
0.0245
(60)
0.62
(2.3)
0.62 (2.3)
1.23 (4.7)
1.85 (7.0)
2.46 (9.3)
77