Viessmann Vitocrossal 200 Service Instructions For Contractors page 52

Gas condensing boiler with matrix radiant burner 6 bar
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Connection diagrams
Burner control unit connection diagram
Fig. 56
Burner control unit VUC 310
A
Fan motor with PWM control and feedback
H
Air pressure switch 1
L
52
Gas pressure switch 1
M
Air pressure switch 2
N
Display and programming unit
T

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