Service Manual

Page 36
4.13 Electrodes
The spark generation is started immediately before opening the gas valve and stopped when
ionization is sensed. The flame is sensed through an ionization electrode, and detection is granted
for ionization currents greater than 0.5 micro-amps (µA).
Figure 31 – Electrodes Overview
A -
Ionization electrodes
B -
Ignition electrodes
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