Viessmann VITODENS 100-W Installation And Service Instructions Manual page 81

Gas fired wall mounted condensing boiler natural gas version type wb1a

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Connection and wiring diagram - system boiler

Alternative (remove jumper

when connecting)

Boiler temperature sensor

sÖ

Circulation pump 230V~

dÖ

Step motor diverter valve

Flow switch (Heating water)

Gas solenoid valve

fÖ

Mains input 230V~/50Hz

(cont.)

Temperature limiter

Mains connection accessories/

room temperature control/DHW

cylinder control

a-ÖA Fan

aCA

Air pressure switch

aND

Water pressure sensor

Designs

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