Connection And Wiring Diagram - External Connections - Viessmann Vitodens 200-W Installation And Service Instructions For Contractors

Designs
Connection and wiring diagram
Fig. 73
A1 Main PCB
A2 Power supply unit
A3 Optolink
A4 Burner control unit
A5 Programming unit
A6 Coding card
A7 Connection adaptor
A8 LON communication module
(Vitotronic 200)
A9 Internal extension H1 or H2
S1 ON/OFF switch
S2 Reset button
X... Electrical interface
Outside temperature sensor
!
104
External connections
–
Flow temperature sensor, low loss header
?
Cylinder temperature sensor (type B2HA)
%
or
Comfort sensor (type B2KA)
(plug on the cable harness)
Internal circulation pump
sÖ
Gas solenoid valve
dG
Power supply
fÖ
Power supply for accessories and Vitotrol 100
lH
Fan motor
a-Ö
A Fan motor control
a-Ö
Gas pressure switch
aYA
KM BUS
aVG