Systems with additional Viessmann control units
B
C
E
L
F
N
D
M
1~
?
R6
R5
R4
R3
R2
R1
L
Mains
Red eléctrica
Réseau électrique
6.3 A (slow)
230V
R7-A
R7-M
R7-R
AC 250V 0.8 A
AC 250V 4(2) A
R1-R6
R7
T40
IP20
230V ~ 50-60 Hz
P = 3VA
N
N N N NN
29 30 31 32 33 34 35
A
A
Wiring chamber of the solar control unit
B
Contactor relay
C
Resistor (on site) for
PTC: 560 Ω
NTC: 8.2 kΩ
(subject to the type of boiler control unit)
D
To the boiler control unit; connection for cylinder temperature
sensor
E
Cylinder temperature sensor of the boiler control unit
F
Transfer pump
The transfer pump starts at an adjustable time if the DHW cylinder
has not reached 60 ºC at least once per day.
A resistor simulates a DHW temperature of approx. 35 ºC.
The transfer pump is connected to relay output R3 or R5, irrespec-
tive of which relays are already assigned standard functions.
External heat exchanger with solar control module
The DHW cylinder is heated via the heat exchanger. The secondary
pump
sS
starts in parallel with solar circuit pump
sF
.
If an additional temperature sensor
/
is used, secondary pump
sS
starts when solar circuit pump
sF
is running and the required tem-
perature differential between sensors
%
and
/
is given.
External heat exchanger with Vitosolic 100
The DHW cylinder is heated via the heat exchanger. Secondary
pump R2 starts in parallel with solar circuit pump R1.
External heat exchanger with Vitosolic 200
In systems with several consumers, either an individual consumer or
all consumers can be heated via the external heat exchanger.
The consumers will be heated up to the selected set temperature
(delivered condition 60 °C).
Solar control units
(cont.)
VITOSOL
VIESMANN
33
5822 440 GB
6
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