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DBW 2010/2020/300 COOLANT HEATERS GENERAL DESCRIPTION
2.1.5 FLAME DETECTOR (23)
Figure 5: Flame Detector and Photo Disc
The flame detector is a photosensitive, varying resistance
element that supplies a “flame” or “no flame” signal to
the control unit.
IMPORTANT! The photo disc to which the flame
detector is attached must be flat and free floating
over the nozzle and electrodes.
2.1.6 COMBUSTION AIR INTAKE (26)
The air intake socket provides regulation of the
combustion air quantity to the fuel quantity atomized by
the high-pressure atomizer nozzle.
Figure 6: Combustion Air Intake Bellows
Flame Detector
Photo Disc
Screw
Locking screw
Combustion air