Viessmann Vitotronic 200 Installation And Service Instructions For Contractors page 126

Connection and wiring diagrams
Connection and wiring diagram
PCB, low voltage
Fig. 55
Outside temperature sensor
!
§ Boiler water temperature sensor
Cylinder temperature sensor
%A
or
Top cylinder temperature sensor in a cyl-
inder loading system
Cylinder temperature sensor (bottom) in
%B
a cylinder loading system
/ Temperature sensor, low loss header
) ?
Buffer temperature sensor
Flue gas temperature sensor
aG
Therm-Control temperature sensor
aJA
or
T1 return temperature sensor
Temperature sensor cylinder loading sys-
aJB
tem
or
T2 return temperature sensor
126
(cont.)
jS
aVD .1/ aVD
.2/
aVD aVD
aVG
.1/
aVH aVH
.2/
aVH aVH
X
CAN bus subscriber
.2 External operating program changeover
or
Mixer OPEN
.3 External blocking
or
Mixer CLOSE
KM-BUS subscribers
.2 External changeover, stepped / modulat-
ing burner
.3 External demand
Data exchange port
Data exchange port
Electrical interfaces