Viessmann Vitocrossal 200 Service Instructions For Contractors page 69

Gas condensing boiler with matrix radiant burner permissible operating pressure 6 bar (0.6 mpa)
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Burner control unit connection diagram
Fig. 48
Burner control unit VUC 310
A
Flame monitor with ionisation current
B
C
Vitotronic control unit
Servomotor for rotary damper or 2/2-way solenoid
D
valve
Ignition unit
E
Fuel valve BV1
F
Suppressor choke box
U
(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
69

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