KST – KROMSCHRÖDER SYSTEM TECHNOLOGY
5.2.2.6 Flue gas venting
Flue gases shall be vented in a safe way.1)
IThE with a closed combustion chamber or combustion chamber with at least three surrounding walls shall be equipped with a flue system. The cross sectional area of the flue system shall be calculated according to volume, pressure and temperature of the flue gases (products of combustion, excess air and process emissions).
For IThE’s equipped with natural draught burners the flue system shall be fitted with an appropriate draught break, above the height of the operator, or control damper (typical example of a draft break see informative Annex C, Figure C.6).
If the flue gases are extracted by a fan or the draught is controlled by a damper, the system shall be fitted with a safety device to effect a safety shut-down of the burner(s) or a switching over to a backup duct system in the event of a failure in the flue venting. This function shall meet the requirement of the protective system according to 5.7.2 and 5.7.3. For all IThE equipment burners supplied without a flue system the combustion products shall be directed away from the workplace. The instructions for use shall refer to the need for sufficient venting to ensure the correct air quality for the operator.
NOTE 1 EN 525 gives useful information on maintaining the air quality in workshops.
NOTE 2 Local regulations may apply.
The following chapters are printed with the permission of the DIN Deutsches Institut für Normung e.V. (German Institute for Standardization). For the implementation of the DIN Standard, the version with the most recent issue date is deemed authoritative. This is available from Beuth Verlag GmbH, Burggrafenstrasse 6, 10787 Berlin, Germany.
Our note on this Standard:
1) On the basis of his risk assessment, the furnace manufacturer must define what criterion is used to monitor flue gas channelling or furnace pressure, and is integrated in the protective system.
