BCU 440 · Edition 01.17 26
Flame control
7 Flame control
With ionisation sensor
The BCU generates an alternating voltage (230 V AC)
between the sensing electrode and burner ground. The
flame rectifies this voltage. Only the DC signal (> 1 µA)
is detected by the burner control unit.
A flame cannot be simulated. Ignition and monitoring
with a single electrode is possible.
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