Limit switch for the ash container
If the ash container is removed, a switch triggers the immediate reaction:
•
A negative pressure is built-up (the induced draught fan is stepped-up).
• The fuel conveyor is stopped and the combustion is shut down.
Fire safety regulations
For systems in Switzerland: Low-emission operation according to VHe homologation is only en-
sured when the plant can be operated at low flue-gas temperatures of the smallest thermal out-
put (30 % of nominal load). Usually this requires a condensation-resistant chimney. If you have
any questions about this, please contact your installation company.
Due to the high boiler efficiency rate, the chimney design should be executed so that it is re-
sistant to moisture. A moisture-resistant chimney design means that there will be no moisture
penetration or damage to the brickwork, even though the temperature level in the flue-gas path
remains permanently below the flue-gas dewpoint (see DIN 18160).
2.3
Overview
2
Fire safety regulations
B KWB Easyfire EN, 05.2011
11
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