Viessmann VITODENS 050-W Installation And Service Instructions Manual page 81

Connection and wiring diagrams
Flow sensor
B
Diverter valve stepper motor
C
Ionisation electrode
D
A1 Main PCB
A2 Switching mode power supply
A3 Programming unit
PWM Circulation pump control
X ... Electrical interface
Boiler water temperature sensor
§
Outlet temperature sensor
$
(cont.)
Flue gas temperature sensor
aG
Circulation pump 230 V~
sÖ
Gas solenoid valve
dG
Power supply
fÖ
Temperature limiter
fJ
Ignition
gF
Fan motor 230 V~
a-Ö
a-ÖA Fan control
Designs
81