Viessmann VITOSOL SERIES Technical Manual page 57

DHW cylinders
(cont.)
Pressure drop
1000
800
600
500
400
300
200
100
80
60
50
40
30
20
10
8
6
5
4
3
Heating water throughput in l/h
Pressure drop on the heating water side, upper indirect coil
Solar circuit pump
Specification (standard solar pump incl. solar set)
Grundfos circulation pump
Rated voltage
Power consumption at
– Output stage I
– Output stage II
– Output stage III
Flow indicator
Safety valve (solar)
Max. operating temperature
Max. operating pressure
VITOSOL
100
80
60
50
40
30
20
10
8
6
5
4
3
DHW throughput in l/h
Pressure drop on the DHW side
7
25–60
6
V~ 230
5
W 40
4
W 65
3
W 80
2
l/min 2 to 15
1
bar 6
°C 120
0
0
bar 6
Pump rate in m³/h
A Pressure drop curve
B Residual head
C Output stage I
D Output stage II
E Output stage III
Note
The pressure drop curve A relates to all components of the solar set:
■ Air vent valve
■ Ball valves (HVs and HRs)
■ Flow meter
■ Pipework
A
E
B
D
C
0.5 1.0 1.5
VIESMANN
10
57