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25
AST 14 C 258/00
3.4 PRE-MIXED BURNER
The stainless steel burner with cylindrical shape is fixed to the exchanger by means of an
aluminium flange. Inside the flange there is a silicone seal (to be replaced every two
years upon maintenance) and a flue gas and condensate sealing rope, whereas a
ceramic fibre insulating material prevents it from overheating.
The burner outer case features small round and oval holes to avoid a backfire. The internal
side ensures an even distribution of the air-gas mixture on the whole burner surface.
On the aluminium flange is an electrode for flame ignition and detection.
Ignition/detection
electrode
Flame
inspection glass
Burner case
Ceramic
fibre