Viessmann Vitopend 200-W - Page 114

§ Boiler water temperature sen-
sor
$ Outlet temperature sensor
aA Ionisation electrode
dÖ Stepper motor for diverter
valve
fJ Thermocouple
gF Ignition unit
a-Ö Fan motor for burner
a-ÖA Fan control
aYS Gas pressure switch
aCA Air pressure switch
aVL Flow switch
a:Ö Modulation coil
Connection and wiring diagram – internal . . . (cont.)
114
Designs
5592 817 GB