Viessmann Vitocrossal 200 Service Instructions Manual page 49

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Table of Contents

Burner control unit connection diagram

K1 Relay contact

M1 Fan motor with PWM control and

feedback

S1 ON/OFF switch (inside the control

unit)

S2 Control thermostat

S3 Output controller (inside the con-

trol unit)

Burner control unit connection diagram

(cont.)

T1 Ignition unit

X1 Servomotor for rotary valve dam-

per (for 246 and 311 kW)

Y1 Gas fuel safety valve

Y2 Choke valve (for 87, 142 and 186

kW)

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