Viessmann Vitocrossal 200 Service Instructions For Contractors page 53

Gas condensing boiler with matrix radiant burner 6 bar

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Burner control unit connection diagram

Fig. 57

Burner control unit VUC 310

Flame monitor with ionisation current

Vitotronic control unit

Servomotor for rotary damper or 2/2-way solenoid

valve

Ignition unit

Fuel valve BV1

Suppressor choke box

(cont.)

F1 Backup fuse

F2 Backup fuse

F6 High limit safety cut-out

F7 Temperature controller

H1 Hours run meter, modulation

H2 Fault message

S1 ON/OFF switch

Connection diagrams

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Cm2b Cm2