Burner Control Unit - Bosch Condens 7000 F Installation And Maintenance Instructions For The Contractor

Appendix

17.4.2 Burner control unit

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3
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Fig. 73 Wiring diagram of burner control unit
[1] Fan (connection of PWM signal and mains)
[2] Ignition transformer
[3] Ionisation
[4] Gas solenoid valve (MV1/MV2)
[5] Mains input
[6] Water pressure sensor
[7] Flow temperature sensor
[8] Return temperature sensor
[9] Boiler water temperature sensor
[10] Temperature switch
[11] Valve check system (closed during operation)
[12] Differential pressure switch (closed during operation)
[13] Flue gas pressure limiter (always closed)
[14] Control unit
[15] Burner control unit
With the boiler ratings 75-150 kW an interference suppression coil is
connected in series between the power supply of the burner control unit
and power supply of the fan.
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2
MV1
4
MV2
12
P
14
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Condens 7000 F – 6720871560 (2019/11)
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