Viessmann Vitodens 050-W Installation And Service Instructions Manual page 59

Connection and wiring diagrams
C Diverter valve stepper motor
D Ionisation electrode
A1 Main PCB
A2 Power supply unit
A3 Programming unit
PWM Circulation pump switching
X ... Electrical interface
§ Boiler water temperature sensor
$ Outlet temperature sensor
(cont.)
aG Flue gas temperature sensor
sÖ Circulation pump 230 V~
dG Gas solenoid valve
fÖ Power supply
fJ Temperature limiter
gF Ignition
a-Ö Fan motor 230 V~
a-ÖA Fan control
Designs
59