External Heat Exchanger With Solar Control Module - Viessmann VITOSOL 100-F SV Technical Manual

Solar control units
(cont.)
Systems with Vitotronic control units and KM BUS
Control units from the current product range are equipped with the
necessary software. When retrofitting an existing system, the boiler
control unit may have to be equipped with a PCB (see Viessmann
pricelist).
Boiler control unit settings
Systems with additional Viessmann control units
R1-R6 AC 250V 0.8 A
R7 AC 250V 4(2) A
A
T40
IP20
230V ~ 50-60 Hz
P = 3VA
B
C
D
E
A Wiring chamber of the solar control unit
B Contactor relay

External heat exchanger with solar control module

&
sF
/
%
sS
VITOSOL
Mains
Réseau électrique
6.3 A (slow)
Red eléctrica
230V
L
N
29 30 31 32 33 34 35
N N N N N
L
N
?
M
1~
F
■ Set DHW temperature 2 must be encoded
■ DHW phase 4 for DHW heating must be enabled
This signal is then relayed via the KM BUS to the solar control unit.
The transfer pump starts at an adjustable time if the DHW cylinder has
not reached 60 ºC at least once per day.
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, irrespective
of which relays are already assigned standard functions.
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 temper-
ature differential between sensors % and / is given.
10
VIESMANN
47