Pressure drops
500 600
800 1000
2000
3000
4000 5000 6000
8000 10000
3
4
5
6
8
10
20
30
40
50
60
80
100
200
300
400
500
600
800
1000
mbar
0.3
0.4
0.5
0.6
0.8
1
2
3
4
5
6
8
10
20
30
40
50
60
80
100
kPa
Pressure drop
Heating water flow rate in
l/h
Pressure drop on the heating water side
500 600
800 1000
2000
3000
4000 5000
0.3
0.4
0.5
0.6
0.8
1
2
3
4
5
6
8
10
kPa
3
4
5
6
8
10
20
30
40
50
60
80
100
mbar
Pressure drop
DHW flow rate in
l/h
Pressure drop on the DHW side
Solar internal indirect coil set
Part no. 7186 663
For the connection of solar collectors to the DHW cylinder.
Suitable for systems to DIN 4753. Total water hardness of up to
20 °dH (3.6 mol/m
3
).
Permissible temperatures
Solar side
140 °C
Heating water side
110 °C
DHW side
– for boiler operation
95 °C
– for solar operation
60 °C
Permissible operating pressure
Solar side, heating and DHW side
10 bar
Test pressure
Solar side, heating and DHW side
13 bar
Minimum wall clearance
For the installation of the solar heat exchanger set
350 mm
DHW cylinders
(cont.)
VITOSOL
VIESMANN
73
5822 440 GB
11