EN 12067-2:2004

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Gas/air ratio controls for gas burners and gas burning appliances - Part 2: Electronic typesRegulatorji razmerja plina in zraka za plinske gorilnike in plinske aparate - 2. del: Elektronski tipDispositifs de régulation du rapport air/gaz pour bruleurs a gaz et appareils a gaz - Partie 2: Dispositifs électroniquesGas-Luft-Verbundregeleinrichtungen für Gasbrenner und Gasgeräte - Teil 2: Elektronische AusführungTa slovenski standard je istoveten z:EN 12067-2:2004SIST EN 12067-2:2004en,fr,de27.060.2023.060.40ICS:SLOVENSKI
STANDARDSIST EN 12067-2:200401-junij-2004

EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 12067-2March 2004ICS 23.060.40; 27.060.20English versionGas/air ratio controls for gas burners and gas burningappliances - Part 2: Electronic typesDispositifs de régulation du rapport air/gaz pour brûleurs àgaz et appareils à gaz - Partie 2: Dispositifs électroniquesGas-Luft-Verbundregeleinrichtungen für Gasbrenner undGasgeräte - Teil 2: Elektronische AusführungThis European Standard was approved by CEN on 2 February 2004.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Central Secretariat or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2004 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 12067-2:2004: E

pageForeword.4Introduction.51Scope.62Normative references.63Terms and definitions.63.1electronic gas/air ratio control (electronic GARC).63.2electronic control box (ECB).73.3actuator.73.4sensor.73.5combustion process.73.6defined safe state.73.7fault tolerating time.83.8safety shut-down.83.9lock-out.83.9.1non-volatile lock-out.83.9.2volatile lock-out.83.10abnormal operation.83.11form closure construction.84Classification.95Units of measurement and test conditions.96Construction requirements.96.1General.96.2Mechanical requirements.96.2.1General.96.2.2Special requirements for electromechanical actuators with position feed-back sensors.106.3Electrical equipment.106.3.1General.106.3.2Class of protection.106.3.3Electronics and software.107Functional requirements.107.1General.107.2Burner control interface.117.3Safety shut-down initiated by the electronic GARC.117.4Start-up sequence.117.5Preset/predefined range.117.6Restart from defined safe state.117.7Accuracy requirements.117.7.1General.117.7.2Sensor(s) and actuators.127.7.3Repeatability.127.8Protection against internal faults.127.8.1Failure modes of components.127.8.2Safety class.127.9Information to be supplied by the manufacturer.127.10Documentation.137.11Assessment.138Protection against environmental influences.138.1General.13

Approval path for the electronic GARC.18Annex B (normative)
Manufacturer's declaration for sensors, actuators and repeatability.19Annex C (normative)
Special requirements for single position feed-back potentiometers inelectromechanical actuators.23Annex ZA (informative)
Clauses of this European Standard addressing essentialrequirements or other provisions of EU Directives.24

Fault flagged
Shut downI------------------------------------------------------I----------------------------------------------------------IFigure 2 — Fault tolerating time3.8 safety shut-downprocess which is effected immediately following the response of a protection device or the detection of a faultin the electronic GARC and places the burner out of operation; the resulting state of the system is defined bydeactivated terminals for the gas shut-off valves and the ignition device [definition 3.17 of EN 298:2003]3.9 lock-out3.9.1 non-volatile lock-outsafety shut-down condition of the system, such that a restart can only be accomplished by a manual reset ofthe system and by no other means [definition 3.18.1 of EN 298:2003]3.9.2 volatile lock-outsafety shut-down condition of the system, such that a restart can only be accomplished by either a manualreset of the system or an interruption of the mains power and its subsequent restoration [definition 3.18.2 ofEN 298:2003]3.10abnormal operationoperation of the appliance under the effect of internal failures or under the effect of foreseeable influencesoutside the specified operational conditions [definition 3.19 of ENV 14459:2002]3.11form closure constructionconstruction ensuring non-slippage
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