Viessmann Vitosol
100 Technical Manual page 86

4.8 Additional Vitosolic 200 functions
Version 2 Bypass circuit with solar cell
In this version, the solar circuit pump also
fulfils this function.
Vitosolic 200 measures the radiation
intensity via the solar cell.
The solar circuit pump is switched ON if
B
C
A
D
F
VL RL
Version 3 Bypass circuit with solar cell and collector temperature sensor
Vitosolic 200 measures the radiation
intensity via the solar cell.
The bypass circuit pump is switched ON if
the irradiation threshold value set on
Vitosolic 200 is exceeded. The bypass
B
D C
A
E
F
VL
86
the irradiation threshold set on Vitosolic
200 is exceeded.
The pump is switched OFF if the
irradiation level falls below the selected
A Solar control unit
B Solar cell
C Solar Divicon
D Solar circuit pump
E Collector temperature sensor
circuit pump is switched OFF and the
solar circuit pump is switched ON, if the
set temperature differential between the
collector temperature sensor and the
cylinder temperature sensor is exceeded.
A Solar control unit
B Solar cell
C Solar pump line
D Solar Divicon
E Circulation pump, bypass circuit
RL
F Collector temperature sensor
switching threshold (drop−out delay
approx. 2 minutes).
The bypass pump is switched OFF if the
irradiation level falls below the selected
switching threshold (drop−out delay
approx. 2.5 minutes).
Note
The Solar Divicon pump is used as the
bypass circuit pump and that of the solar
pump line as the solar circuit pump.
VITOSOL