Viessmann Vitodens 100 Installation And Service Instructions Manual page 69

Connection and wiring diagram
dD
Flow switch
dG
Gas solenoid valve
fÖ
Mains input 230V~/50Hz
fJ
Temperature limiter
gF
Ignition unit
(cont.)
gH
Mains connection accessories/
room temperature control
a-ÖA Fan
aCA
Air pressure switch
Designs
69