Additional Vitosolic 100 Functions - Viessmann Vitosol
100 Technical Manual

4.7 Additional Vitosolic 100 functions

4.7 Additional Vitosolic 100 functions
Suppression of reheating by boiler
Systems with Vitotronic control units with KM BUS
Reheating the DHW cylinder by the boiler
will be suppressed by the solar control
unit if the solar circuit pump is operating.
Systems with alternative Viessmann control units (only in conjunction with connection extension)
Reheating the DHW cylinder by the boiler
will be suppressed by the solar control
unit if the solar circuit pump is operating.
An approx. 10 K higher actual DHW
A
X1 X2
N
BU BK BN
230 V
B
50 Hz
N R2 N R1 N L
12 13 14 15 16 17 18 19 20
K
PE N L
A Connecting extension
B Vitosolic 100
C Heating circuit pump
D Circulation pump for heating up the
pre−heat stage (auxiliary function for
DHW loading)
82
In the boiler control unit, coding
address 67 ON defaults a third set DHW
temperature (setting range: 10 to 95 ºC).
This value must be below the first
set DHW temperature.
temperature is simulated via a resistor in
the connecting extension.
The DHW cylinder will only be heated by
the boiler (solar circuit pump running) if
R1 R2 N L N L
SOP STB USP
*1
C D
M M
1~ 1~
E
E High limit safety cut−out
(if required)
F Cylinder temperature sensor (NTC)
of the boiler control unit
G Cylinder temperature sensor (PTC)
of the boiler control unit
R1 K1
K1
R2
X3
1 2 3 4 5
PTC PTC Control
NTC unit
G
or
F
H
The DHW cylinder will only be loaded by
the boiler (solar circuit pump running) if
this set value cannot be reached by the
solar heating system.
this actual temperature is not achieved by
the solar heating system.
H To the boiler control unit (connection
for cylinder temperature sensor)
K Mains isolator, on site
*1
Remove jumper when making this
connection.
VITOSOL