SIST EN 12067-2:2023

Safety and control devices for burners and appliances burning gaseous or liquid fuels - Control functions in electronic systems - Part 2: Fuel/air ratio control/supervision of the electronic types

This European Standard specifies the safety, construction and performance requirements for electronic fuel/air ratio control system (ERC), electronic fuel/air ratio supervision system (ERS) and electronic fuel/air ratio trim system (ERT) intended for use with burners and appliances burning gaseous or liquid fuels. It also describes the test procedures for evaluating these requirements and specifies information necessary for installation and use.
This European Standard is applicable to
— closed loop fuel/air ratio control systems, see 3.101;
— fuel/air ratio supervision systems, see 3.102;
— closed loop fuel/air ratio trim systems, see 3.103;
and does not differentiate into classification by heat input.
NOTE 1 European Standards for burners, appliances or processes which use ERC, ERS or ERT can override the requirements of this standard.
NOTE 2 Provisions for production control are not part of this European Standard.

Sicherheits- und Regeleinrichtungen für Brenner und Brennstoffgeräte für gasförmige oder flüssige Brennstoffe - Regel- und Steuerfunktionen in elektronischen Systemen - Teil 2: Elektronische Gas-Luft-Verbundregel- und Überwachungseinrichtungen

EN 13611:2019, Abschnitt 1, wird wie folgt ersetzt:
Dieses Dokument legt die Sicherheits-, Auslegungs-, Konstruktions- und Leistungsanforderungen sowie die Prüfungen für elektronische Einrichtungen zur Regelung (en: electronic fuel/air ratio control system, ERC), Überwachung (en: electronic fuel/air ratio supervision system, ERS) und Justierung (en: electronic fuel/air ratio trim system, ERT) des Brennstoff-Luft-Verhältnisses fest, die zur Verwendung mit Brennern und Geräten bestimmt sind, die gasförmige oder flüssige Brennstoffe verbrennen. Es beschreibt darüber hinaus die Verfahren zur Bewertung der Einhaltung dieser Anforderungen und legt die Informationen fest, die für die Installation und den Gebrauch erforderlich sind.
Dieses Dokument gilt für:
-   Einrichtungen zur Regelung des Brennstoff-Luft-Verhältnisses, siehe 3.101;
-   Einrichtungen zur Überwachung des Brennstoff-Luft-Verhältnisses, siehe 3.102;
-   Einrichtungen zur Justierung des Brennstoff-Luft-Verhältnisses, siehe 3.103;
und enthält keine Klassifizierung nach Wärmezufuhr.
ANMERKUNG   Die Anforderungen in Dokumenten für Brenner, Geräte oder Prozesse, bei denen ERC, ERS oder ERT verwendet werden, können Vorrang vor den Anforderungen in diesem Dokument haben.

Dispositifs de commande et de sécurité pour les brûleurs et les appareils utilisant des combustibles gazeux ou liquides - Dispositifs électroniques de régulation - Partie 2 : Régulation et surveillance du rapport air/combustible de type électronique

L’article 1 de l’EN13611 :20191 est remplacée par ce qui suit :
Ce document spécifie les exigences de sécurité, de construction et de performance ainsi que les essais applicables aux systèmes de régulation électronique du rapport air/combustible (ERC), aux systèmes de surveillance électronique du rapport air/combustible (ERS) et aux systèmes de contrôle électronique du rapport air/combustible (ERT) destinés à équiper les brûleurs et appareils à gaz ou fioul. Il décrit aussi les modes opératoires d’essai permettant de vérifier la conformité à ces exigences, ainsi que les informations nécessaires à l’installation et à l’utilisation.
Le présent document est applicable :
-   aux systèmes de régulation du rapport air/combustible en boucle fermée, voir 3.101 ;
-   aux systèmes de surveillance du rapport air/combustible, voir 3.102 ;
-   aux systèmes de contrôle du rapport air/combustible en boucle fermée, voir 3.103 ;
et ne fait pas de classification en fonction du débit calorifique.
NOTE    Les normes européennes pour les brûleurs, appareils ou processus qui utilisent l’ERC, l’ERS ou l’ERT peuvent annuler les exigences du présent document.

Varnostne in nadzorne naprave za gorilnike in aparate na plin ali tekoča goriva - Regulacijske in nadzorne funkcije v elektronskih sistemih - 2. del: Regulacija in nadzor razmerja goriva in zraka za elektronski tip

Ta evropski standard določa varnostne in konstrukcijske zahteve ter zahteve glede zmogljivosti za elektronski sistem z regulacijo razmerja goriva in zraka (ERC), elektronski sistem z nadzorom razmerja goriva in zraka (ERS) ter elektronski sistem z uravnoteženjem razmerja goriva in zraka (ERT), ki so namenjeni uporabi z gorilniki in aparati na plin ali tekoča goriva. Prav tako opisuje preskusne postopke za vrednotenje teh zahtev ter vsebuje potrebne informacije za namestitev in uporabo.
Ta evropski standard se uporablja za:
– zaprtozančne sisteme z regulacijo razmerja goriva in zraka (glej točko 3.101);
– sisteme z nadzorom razmerja goriva in zraka (glej točko 3.102);
– zaprtozančne sisteme z uravnoteženjem razmerja goriva in zraka (glej točko 3.103);
ter ne razlikuje med razvrstitvami glede na vhodno toplotno moč.
OPOMBA 1: Evropski standardi za gorilnike, aparate ali procese, ki uporabljajo elektronski sistem z regulacijo razmerja goriva in zraka, elektronski sistem z nadzorom razmerja goriva in zraka ter elektronski sistem z uravnoteženjem razmerja goriva in zraka lahko preglasijo zahteve tega standarda.
OPOMBA 2: Določbe v zvezi z nadzorom proizvodnje niso del tega evropskega standarda.

General Information

• Status: Published
• Public Enquiry End Date: 02-Mar-2020
• Publication Date: 09-Jan-2023
• ICS: 23.060.40 - Pressure regulators
• ICS: 27.060.20 - Gas fuel burners
• Technical Committee: PLN - Gas appliances for domestic use
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 21-Dec-2022
• Due Date: 25-Feb-2023
• Completion Date: 10-Jan-2023
• Directive: 2016/426 - REGULATION (EU) 2016/426 OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL of 9 March 2016 on appliances burning gaseous fuels and repealing Directive 2009/142/EC
• Mandate: M/BC/CEN/89/6 - Standardization request to CEN concerning appliances burning gaseous fuels
• Ref Project: EN 12067-2:2022 - Safety and control devices for burners and appliances burning gaseous or liquid fuels - Control functions in electronic systems - Part 2: Fuel/air ratio control/supervision of the electronic type

Relations

• Revises: oSIST prEN 12067-2:2016 - Safety and control devices for burners and appliances burning gaseous or liquid fuels - Control functions in electronic systems - Part 2: Fuel/air ratio control / supervision of the electronic type
• Effective Date: 01-Feb-2023
• Replaces: SIST EN 12067-2:2004 - Gas/air ratio controls for gas burners and gas burning appliances - Part 2: Electronic types
• Effective Date: 01-Feb-2023

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN 12067-2:2023
01-februar-2023
Nadomešča:
SIST EN 12067-2:2004
Varnostne in nadzorne naprave za gorilnike in aparate na plin ali tekoča goriva -
Regulacijske in nadzorne funkcije v elektronskih sistemih - 2. del: Regulacija in
nadzor razmerja goriva in zraka za elektronski tip
Safety and control devices for burners and appliances burning gaseous or liquid fuels -
Control functions in electronic systems - Part 2: Fuel/air ratio control/supervision of the
electronic types
Sicherheits- und Regeleinrichtungen für Brenner und Brennstoffgeräte für gasförmige
oder flüssige Brennstoffe - Regel- und Steuerfunktionen in elektronischen Systemen -
Teil 2: Elektronische Gas-Luft-Verbundregel- und Überwachungseinrichtungen
Dispositifs de commande et de sécurité pour les brûleurs et les appareils utilisant des
combustibles gazeux ou liquides - Dispositifs électroniques de régulation - Partie 2 :
Régulation et surveillance du rapport air/combustible de type électronique
Ta slovenski standard je istoveten z: EN 12067-2:2022
ICS:
23.060.40 Tlačni regulatorji Pressure regulators
27.060.20 Plinski gorilniki Gas fuel burners
SIST EN 12067-2:2023 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 12067-2:2023

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SIST EN 12067-2:2023


EN 12067-2
EUROPEAN STANDARD

NORME EUROPÉENNE

November 2022
EUROPÄISCHE NORM
ICS 23.060.40; 27.060.20 Supersedes EN 12067-2:2004
English Version

Safety and control devices for burners and appliances
burning gaseous or liquid fuels - Control functions in
electronic systems - Part 2: Fuel/air ratio
control/supervision of the electronic type
Dispositifs de commande et de sécurité pour les Sicherheits- und Regeleinrichtungen für Brenner und
brûleurs et les appareils utilisant des combustibles Brennstoffgeräte für gasförmige oder flüssige
gazeux ou liquides - Dispositifs électroniques de Brennstoffe - Regel- und Steuerfunktionen in
régulation - Partie 2 : Régulation et surveillance du elektronischen Systemen - Teil 2: Elektronische Gas-
rapport air/combustible de type électronique Luft-Verbundregel- und Überwachungseinrichtungen
This European Standard was approved by CEN on 2 October 2022.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.





EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 12067-2:2022 E
worldwide for CEN national Members.

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SIST EN 12067-2:2023
EN 12067-2:2022 (E)
Contents Page
European foreword . 5
Introduction . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 8
4 Classification . 14
4.1 Classes of control . 14
4.2 Groups of control . 14
4.3 Classes of control functions . 14
4.4 Types of DC supplied controls . 14
5 Test conditions and uncertainty of measurements . 14
6 Design and construction . 15
6.1 General . 15
6.2 Mechanical parts of the control . 16
6.3 Materials . 16
6.4 Gas connections . 16
6.5 Electronic parts of the control . 16
6.6 Protection against internal faults for the purpose of functional safety . 17
6.101 Requirements for using alternative actuators on application level . 20
7 Performance . 20
7.1 General . 20
7.2 Leak-tightness . 20
7.3 Torsion and bending . 20
7.4 Rated flow rate . 21
7.5 Durability . 21
7.6 Performance tests for electronic controls . 21
7.7 Long-term performance for electronic controls . 21
7.8 Data exchange . 23
7.101 Functional requirements. 23
8 Electrical requirements . 26
8.1 General . 26
8.2 Protection by enclosure . 26
9 Electromagnetic compatibility (EMC) . 26
9.1 Protection against environmental influences . 26
9.2 Supply voltage variations below 85 % of rated voltage . 28
9.3 Voltage dips and interruptions . 28
9.4 Supply frequency variations . 28
9.5 Surge immunity test . 28
9.6 Electrical fast transient/burst . 29
9.7 Immunity to conducted disturbances induced by radio frequency fields . 29
9.8 Immunity to radiated fields induced by radio frequency fields. 29
9.9 Electrostatic discharge test . 29
9.10 Power frequency magnetic field immunity test . 29
2

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SIST EN 12067-2:2023
EN 12067-2:2022 (E)
9.11 Harmonics and interharmonics including mains signalling at AC power port, low
frequency immunity tests . 30
10 Marking, instructions . 30
10.1 Marking . 30
10.2 Instructions . 30
10.3 Warning notice . 32
Annex A (informative) Abbreviations and symbols . 33
Annex B (informative) Leak-tightness tests for gas controls − volumetric method . 34
Annex C (informative) Leak-tightness tests for gas controls − pressure loss method . 35
Annex D (normative) Calculation of pressure loss into leakage rate . 36
Annex E (normative) Electrical/electronic component fault modes . 37
Annex F (normative) Additional requirements for safety accessories and pressure
accessories as defined in 2014/68/EU . 38
Annex G (normative) Materials for pressurized parts . 39
Annex H (normative) Additional materials for pressurized parts . 40
Annex I (normative) Requirements for controls used in DC supplied burners and
appliances burning gaseous or liquid fuels. 41
Annex J (normative)  Method for the determination of a Safety integrity level (SIL) . 42
Annex K (normative) Method for the determination of a Performance Level (PL) . 43
Annex L (informative) Relationship between Safety Integrity Level (SIL) and Performance
Level (PL) . 44
Annex M (normative) Reset functions . 45
Annex N (informative) Guidance document on Environmental Aspects . 46
Annex O (normative) Seals of elastomer, cork and synthetic fibre mixtures . 47
Annex AA (normative) Declaration for sensors, actuators and repeatability . 48
Annex BB (normative) Special requirements for single position feed-back potentiometers
in electromechanical actuators . 52
BB.1 Requirements . 52
BB.2 Endurance test . 52
Annex CC (informative) Overall fuel/air ratio accuracy . 53
CC.1 General . 53
CC.2 Method A: . 53
CC.3 Method B: . 53
Annex DD (informative) Guideline for the integration of an ERC, ERS or ERT into the
appliance. 55
DD.1 General . 55
DD.2 Integrational aspects . 55
DD.3 Rules for mechanical integration . 56
DD.4 Rules for electrical integration . 56
3

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SIST EN 12067-2:2023
EN 12067-2:2022 (E)
DD.5 Rules for functional integration/functional tests of the appliance . 56
DD.6 Responsibility matrix . 56
Annex EE (informative) Guideline for the definition of limits for safe operation of the
appliance . 57
EE.1 Introduction . 57
EE.2 General aspects . 57
EE.3 Rules for the evaluation of the risk of explosion . 58
EE.4 Rules for the evaluation of the risk of poisoning . 59
EE.5 Rules for the evaluation of the risk of fire . 61
EE.6 Rules for the evaluation of the risks due to vibration . 62
Annex FF (normative) Requirements for using alternative actuators on application level . 63
FF.1 General . 63
FF.2 Requirements for the use of alternative actuators . 63
FF.3 Documentation . 65
Annex ZA (informative) Relationship between this European Standard and the essential
requirements of Directive 2009/142/EC aimed to be covered . 66
Annex ZB (informative) Relationship between this European Standard and the essential
requirements of Regulation (EU) 2016/426 aimed to be covered . 67
Annex ZC (informative) Relationship between this European Standard and the essential
requirements of Directive 2014/68/EU aimed to be covered . 68
Bibliography . 69

4

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SIST EN 12067-2:2023
EN 12067-2:2022 (E)
European foreword
This document (EN 12067-2:2022) has been prepared by Technical Committee CEN/TC 58 “Safety and
control devices for burners and appliances burning gaseous or liquid fuels”, the secretariat of which is
held by BSI.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by May 2023, and conflicting national standards shall be
withdrawn at the latest by November 2025.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 12067-2:2004.
The following significant changes compared to the previous edition have been incorporated in this
document:
a) alignment with EN 13611:2019;
b) title change to include liquid fuel and to bring it in line with the title of EN 13611:2019;
c) integration of the requirements for fuel/air ratio using oil as the fuel;
d) addition of the control types ERS and ERT;
e) update to EN 60730-1:2016;
f) update of requirements for fault reaction time and fault tolerating time;
g) update of the Annexes for sensors and actuators (see Annex AA);
h) inclusion of the use of pressure and combustion products sensing devices already conforming to
1
EN 1854:— , EN 60730-2-6:2016, and EN 16340:2014 respectively;
i) new Annex Guideline for the integration of ERC, ERS or ERT into the appliances (see Annex DD);
j) new Annex Guideline for the definition of limits for safe operation on the appliance (see
Annex EE);
k) new Annex Requirements for using alternative actuators on application level (see Annex FF).
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organisations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the
United Kingdom.
5

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SIST EN 12067-2:2023
EN 12067-2:2022 (E)
Introduction
This document is intended to be used in conjunction with EN 13611:2019.
This document refers to clauses of EN 13611:2019 or adapts clauses by stating “with the following
modification”, “with the following addition”, “is replaced by the following” or “is not applicable” in the
corresponding clause.
This document adds clauses or subclauses to the structure of EN 13611:2019 which are particular to
this document. Subclauses which are additional to those in EN 13611:2019 are numbered starting from
101. Additional Annexes are designated as Annex AA, Annex BB, Annex CC, etc. It should be noted that
these clauses, subclauses and Annexes are not indicated as an addition.
If by reference to EN 13611:2019 the term “control” is given, this term should be read as fuel/air ratio
control/supervision system”.
EN 12067-2 compliance for electronic fuel/air ratio control/supervision system cannot be claimed
based upon SIL classification according to EN 61508.
SIL classification cannot be claimed based upon compliance with this document only. A supplementary
method for SIL determination is specified in EN 13611:2019, Annex J.
6

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SIST EN 12067-2:2023
EN 12067-2:2022 (E)
1 Scope
EN 13611:2019, Clause 1 is replaced by the following:
This document specifies the safety, design, construction and performance requirements, and testing for
electronic fuel/air ratio control systems (ERC), electronic fuel/air ratio supervision systems (ERS) and
electronic fuel/air ratio trim systems (ERT) intended for use with burners and appliances burning
gaseous or liquid fuels. It also describes the procedures for evaluating these requirements and specifies
information necessary for installation and use.
This document is applicable to:
— closed loop fuel/air ratio control systems, see 3.101;
— fuel/air ratio supervision systems, see 3.102;
— closed loop fuel/air ratio trim systems, see 3.103;
and does not differentiate into classification by heat input.
NOTE The documents for burners, appliances or processes which use ERC, ERS or ERT can override the
requirements of this document.
2 Normative references
EN 13611:2019, Clause 2 applies with the following additions:
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
EN 298:2022, Automatic burner control systems for burners and appliances burning gaseous or liquid
fuels
EN 267:2020, Forced draught burners for liquid fuels
EN 676:2020, Forced draught burners for gaseous fuels
1
EN 1854:— , Safety and control devices for burners and appliances burning gaseous and/or liquid fuels —
Pressure sensing devices for gas burners and gas burning appliances
2
EN 13611:2019 , Safety and control devices for burners and appliances burning gaseous and/or liquid
fuels — General requirements
EN 16340:2014, Safety and control devices for burners and appliances burning gaseous or liquid fuels —
Combustion product sensing devices
EN 60204-1:2018, Safety of machinery — Electrical equipment of machines — Part 1: General
requirements (IEC 60204-1:2016)
3
EN 60335-1:2012 , Household and similar electrical appliances — Safety — Part 1: General requirements
(IEC 60335-1:2010)

1
Under preparation. Stage at the time of publication: FprEN 1854:2022.
2
As impacted by EN 13611:2019/AC:2021.
7

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SIST EN 12067-2:2023
EN 12067-2:2022 (E)
4
EN 60529:1991 , Degrees of protection provided by enclosures (IP Code) (IEC 60529:1989)
5
EN 60730-1:2016 , Automatic electrical controls — Part 1: General requirements (IEC 60730-1:2013,
modified)
6
EN 60730-2-5:2015 , Automatic electrical controls — Part 2-5: Particular requirements for automatic
electrical burner control systems (IEC 60730-2-5:2013)
7
EN 60730-2-6:2016 , Automatic electrical controls — Part 2-6: Particular requirements for automatic
electrical pressure sensing controls including mechanical requirements (IEC 60730-2-6:2015)
8
EN IEC 60730-2-14:2019 , Automatic electrical controls — Part 2-14: Particular requirements for
electric actuators (IEC 60730-2-14:2017)
EN IEC 61000-6-2:2019, Electromagnetic compatibility (EMC) — Part 6-2: Generic standards —
Immunity standard for industrial environments (IEC 61000-6-2:2016)
9
EN 61000-6-4:2007 , Electromagnetic compatibility (EMC) — Part 6-4: Generic standards — Emission
standard for industrial environments (IEC 61000-6-4:2006)
EN 61010-2-202:2017, Safety requirements for electrical equipment for measurement, control and
laboratory use — Part 2-202: Particular requirements for electrically operated valve actuators
(IEC 61010-2-202:2016)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 13611:2019 apply with the
following modifications.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
• ISO Online browsing platform: available at https://www.iso.org/obp
• IEC Electropedia: available at https://www.electropedia.org/

3
As impacted by EN 60335-1:2012/AC:2014, EN 60335-1:2012/A11:2014, EN 60335-1:2012/A13:2017,
EN 60335-1:2012/A1:2019, EN 60335-1:2012/A2:2019, EN 60335-1:2012/A14:2019 and EN 60335-
1:2012/A15:2021.
4
As impacted by EN 60529:1991/corrigendum May 1993, EN 60529:1991/A1:2000, EN 60529:1991/A2:2013
and EN 60529:1991/AC:2016-12.
5
As impacted by EN 60730-1:2016/A1:2019 and EN 60730-1:2016/A2:2022.
6
As impacted by EN 60730-2-5:2015/A1:2019 and EN 60730-2-5:2015/A2:2021.
7
As impacted by EN 60730-2-6:2016/A1:2020.
8
As impacted by EN IEC 60730-2-14:2019/A2:2021 and EN IEC 60730-2-14:2019/A1:2022.
9
As impacted by EN 61000-6-4:2007/A1:2011.
8

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SIST EN 12067-2:2023
EN 12067-2:2022 (E)
3.101
electronic fuel/air ratio control system
ERC
closed loop system consisting of the electronic control unit, actuating elements for the fuel flow and the
air flow as a minimum, and allocated feedback signal(s)
Note 1 to entry: Figure 1 shows an example of different feedback alternatives. For details, see also Table 1.

Key
1 electronic control unit (ECU) 8 sensor flame
2 combustion process 9 sensor flue gas
3 actuator air 10 actuator air feedback
4 actuator fuel 11 actuator fuel feedback
5 sensor air 12 automatic burner control system
6 sensor fuel
7 sensor fuel/air mixture  scope of ERC
a
From the ERC point of view, 12 acts in case a safe state is requested by 1 to de-energize the safety
shut-off valves.
Figure 1 — Scope of the electronic fuel/air ratio control system (ERC)
3.102
electronic fuel/air ratio supervision system
ERS
supervision system consisting of electronic control unit and sensor(s), providing at least one output
signal to indicate if the fuel/air ratio is outside of the safe area of the application
Note 1 to entry: Figure 2 shows an example of different feedback alternatives. For details, see also Table 1.
9

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SIST EN 12067-2:2023
EN 12067-2:2022 (E)

Key
1 electronic control unit (ECU) 8 sensor flame
2 combustion process 9 sensor flue gas
3 actuator air 10 actuator air feedback
4 actuator fuel 11 actuator fuel feedback
5 sensor air 12 automatic burner control system
6 sensor fuel 13 arbitrary control
7 sensor fuel/air mixture  scope of ERS
a
From the ERS point of view, 12 acts in case a safe state is requested by 1 to de-energize the safety
shut-off valves.
Figure 2 — Scope of the electronic fuel/air ratio supervision system (ERS)
3.103
electronic fuel/air ratio trim system
ERT
closed loop system consisting of the electronic control unit, actuating element(s) or control output(s) to
influence the fuel/air ratio controlled by other means, and the allocated feedback signal(s)
Note 1 to entry: Figure 3 shows an example of different feedback alternatives. For details, see also
...

SLOVENSKI STANDARD
oSIST prEN 12067-2:2020
01-februar-2020
Regulatorji razmerja plina in zraka za plinske gorilnike in plinske aparate - 2. del:
Elektronski tip
Gas/air ratio controls for gas burners and gas burning appliances - Part 2: Electronic
types
Gas-Luft-Verbundregeleinrichtungen für Gasbrenner und Gasgeräte - Teil 2:
Elektronische Ausführung
Dispositifs de régulation du rapport air/gaz pour brûleurs à gaz et appareils à gaz - Partie
2: Dispositifs électroniques
Ta slovenski standard je istoveten z: prEN 12067-2
ICS:
23.060.40 Tlačni regulatorji Pressure regulators
27.060.20 Plinski gorilniki Gas fuel burners
oSIST prEN 12067-2:2020 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN 12067-2:2020

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oSIST prEN 12067-2:2020


DRAFT
EUROPEAN STANDARD
prEN 12067-2
NORME EUROPÉENNE

EUROPÄISCHE NORM

November 2019
ICS Will supersede EN 12067-2:2004
English Version

Gas/air ratio controls for gas burners and gas burning
appliances - Part 2: Electronic types
Dispositifs de régulation du rapport air/gaz pour Gas-Luft-Verbundregeleinrichtungen für Gasbrenner
brûleurs à gaz et appareils à gaz - Partie 2: Dispositifs und Gasgeräte - Teil 2: Elektronische Ausführung
électroniques
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 58.

If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations
which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC
Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.


EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 12067-2:2019 E
worldwide for CEN national Members.

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Contents Page
European foreword . 6
Introduction . 7
1 Scope . 8
2 Normative references . 8
3 Terms and definitions . 9
Figure 1 — Scope of the electronic fuel/air ratio control system (ERC) . 9
Figure 2 — Scope of the electronic fuel/air ratio supervision system (ERS) . 10
Figure 3 — Scope of the electronic fuel/air ratio trim system (ERT) . 11
Figure 4 — Relationship between fault tolerating time and fault reaction time control for
ERC and ERS . 12
Figure 5 — Relationship between fault reaction time control for ERT . 13
4 Classification . 14
4.1 Classes of control . 14
4.2 Groups of control . 14
4.3 Classes of control functions . 14
4.4 Types of DC supplied controls . 14
5 Test conditions and uncertainty of measurements . 14
6 Design and construction . 14
6.1 General . 14
Table 1 — Acceptable feedback types . 15
6.2 Mechanical parts of the control . 16
6.3 Materials . 16
6.4 Gas connections . 16
6.5 Electronic parts of the control . 16
6.5.1 General . 16
6.5.2 Switching elements . 16
6.5.3 Electrical components . 16
6.6 Protection against internal faults for the purpose of functional safety . 17
6.6.1 Design and construction requirements . 17
6.6.2 Class A . 17
6.6.3 Class B . 17
6.6.4 Class C . 18
6.6.5 Circuit and construction evaluation . 20
7 Performance . 20
7.1 General . 20
7.2 Leak-tightness . 20
7.3 Torsion and bending . 20
7.4 Rated flow rate . 20
7.5 Durability . 20
7.6 Performance tests for electronic controls . 20
7.6.1 At ambient temperature . 20
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7.6.2 At minimum temperature. 20
7.6.3 At maximum temperature . 20
7.7 Long-term performance for electronic controls . 20
7.7.1 General . 20
7.7.1.101 Performance requirements . 20
7.7.1.102 Test conditions . 21
7.7.2 Stress test . 21
7.7.3 Long term performance test . 22
7.8 Data exchange . 22
7.9 Functional requirements . 23
7.9.1 General . 23
7.9.2 Interface to the automatic burner control system . 23
7.9.3 Start-up sequence . 23
7.9.4 Ranges of operation . 23
Figure 7 — Fault reaction time control for ERC, ERS and ERT . 24
7.9.5 Restart from safe state . 24
7.9.6 Accuracy requirements . 25
7.9.7 Requirements for ACF . 25
8 Electrical requirements . 26
8.1 General . 26
8.2 Protection by enclosure . 26
9 Electromagnetic compatibility (EMC) . 26
9.1 Protection against environmental influences . 26
9.2 Supply voltage variations below 85 % of rated voltage. 27
9.3 Voltage dips and interruptions . 27
9.4 Supply frequency variations . 27
9.5 Surge immunity test . 28
9.6 Electrical fast transient/burst . 28
9.7 Immunity to conducted disturbances induced by radio frequency fields . 28
9.8 Harmonics and interharmonics including mains signalling at a. c. power port, low
frequency immunity tests . 28
9.9 Immunity to radiated fields induced by radio frequency fields . 29
9.10 Electrostatic discharge test . 29
9.11 Power frequency magnetic field immunity test . 29
10 Marking, instructions . 29
10.1 Marking . 29
10.2 Instructions . 29
10.3 Warning notice . 31
10.101 Technical information for the safety after integration in the appliance . 31
Annex A (informative) Abbreviations and symbols . 32
Annex B (informative) Leak-tightness test for gas controls − Volumetric method . 33
Annex C (informative) Leak-tightness for gas controls − Pressure loss method . 34
Annex D (normative) Calculation of pressure loss into leakage rate . 35
Annex E (normative) Electrical/electronic component fault modes . 36
Table E.1 — Electrical/electronic component faults modes . 36
Annex F (normative) Additional requirements for safety accessories and pressure
accessories as defined in 2014 /68/EU . 37
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Annex G (normative) Materials for pressurized parts . 38
Annex H (informative) Additional materials for pressurized parts . 39
Annex I (normative) Requirements for controls used in DC supplied burners and
appliances burning gaseous or liquid fuels . 40
Annex J (normative)  Method for the determination of a safety integrity level (SIL) . 41
Annex K (normative) Method for the determination of a performance level (PL) . 42
Annex L (informative) Relationship between safety integrity level (SIL) and performance
level (PL) . 43
Annex M (normative) Reset functions . 44
Annex N (informative) Guidance document on environmental aspects . 45
Annex O (normative) Seals of elastomer, cork and synthetic fibre mixtures . 46
Annex AA (normative) Declaration for sensors, actuators and repeatability . 47
Table AA.1 — Declaration for sensors . 48
Table AA.2 — Declaration for actuators . 49
Table AA.3 — Declaration for accuracy . 50
Annex BB (normative) Special requirements for single position feed-back potentiometers
in electromechanical actuators . 51
Annex CC (informative) Overall fuel/air ratio accuracy . 52
Table CC.1 — Tolerances (exemplary) . 53
Annex DD (informative) Guideline for the integration of an ERC, ERS or ERT into the
appliance . 54
DD.1 General . 54
DD.2 Integrational aspects . 54
DD.3 Rules for mechanical integration . 55
DD.4 Rules for electrical integration . 55
DD.5 Rules for functional integration / functional tests of the appliance. 55
DD.6 Responsibility matrix . 55
Table DD.1 — Responsibility matrix . 55
Annex EE (informative) Guideline for the definition of limits for safe operation of the
appliance . 56
EE.1 Foreword . 56
EE.2 General aspects . 56
EE.2.1 Principles . 56
EE.2.2 Risk of explosion . 56
EE.2.3 Risk of poisoning . 56
EE.2.4 Risk of fire . 56
EE.2.5 Risk of vibrations . 56
EE.2.6 Other risks . 57
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EE.3 Rules for the evaluation of the risk of explosion . 57
EE.3.1 General . 57
EE.3.2 ERC, ERS or ERT used in gas burners in accordance with EN 676 . 57
EE.3.3 ERC, ERS or ERT used in other appliances . 57
Table EE.1 — Example of lower explosion limits (LEL) and ignition temperatures for
different combustibles. . 57
Table EE.2 — Maximum concentration of combustibles for safe operation . 58
EE.4 Rules for the evaluation of the risk of poisoning . 58
Figure EE.2 — Test room dimensions . 59
Table EE.3 — Maximum leakage rate . 60
EE.5 Rules for the evaluation of the risk of fire . 60
EE.6 Rules for the evaluation of the risks due to vibration . 60
Annex FF (normative) Requirements for using alternative actuators on application level . 62
FF.1 General . 62
FF.2 Requirements for the use of alternative actuators . 62
FF.2.1 Safety and functional requirements specification . 62
FF.2.1.1 Requirements for actuators . 62
FF.2.1.2 Requirements for the interface to the ECU . 63
FF.2.2 Risk assessment . 63
FF.2.3 Test of the ERC/ERS/ERT with alternative actuators in the application . 64
FF.2.4 Alternative actuators SIL qualified according to EN 61508 . 64
FF.3 Documentation . 64
Annex ZA (informative) Relationship between this European Standard and the essential
requirements of Regulation (EU) 2016/426 aimed to be covered . 65
Table ZA.1 — Correspondence between this European Standard with Regulation (EU)
2016/426 . 66
Annex ZB (informative) Relationship between this European Standard and the Essential
Requirements of EU Directive 2014/68/EU concerning pressure equipment . 69
Bibliography . 70

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European foreword
This document (prEN 12067-2:2019) has been prepared by Technical Committee CEN/TC 58 “Safety
and control devices for burners and appliances burning gaseous or liquid fuels”, the secretariat of which
is held by BSI.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 12067-2:2004.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association, and supports essential requirements of EU Directives.
For relationship with EU Directives, see informative Annexes ZA and ZB, which are integral parts of this
document.
It should be noted that the following significant changes compared to the previous edition have been
incorporated in this European Standard:
a) alignment with EN 13611:2019;
b) title changed to include liquid fuel and to bring it in line with the title of EN 13611:2019
b) integration of the requirements for fuel/air ratio using oil as the fuel;
c) addition of the control types ERS and ERT and
d) updating to EN 60730-1:2016;
e) update requirements for fault reaction time and fault tolerating time;
f) updating the Annexes for sensors and actuators (see, Annex AA);
g) including the use of pressure and combustion products sensing devices already conforming to
EN 1854:2010, EN 60730-2-6:2016, and EN 16340:2014 respectively;
h) new Annex Guideline for the integration of ERC, ERS or ERT into the appliances (see, Annex DD);
i) new Annex Guideline for the definition of limits for safe operation on the appliance (see, Annex EE.)
j) new Annex Requirements for using alternative actuators on application level (see, Annex FF.)
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Introduction
This document recognizes the safety philosophy specified by CEN/TC 58 dealing with the safety,
construction and performance of controls for burners and appliances burning gaseous or liquid fuels
and to their testing.
This document refers to clauses of EN 13611:2019 and adapts them, indicating the changes by stating
“with the following modification”, “with the following addition”, “is replaced by the following” or “is not
applicable”. It also adds clauses or subclauses to the structure of EN 13611:2019 which are particular to
this standard (prEN 12067-2:2019). Additional subclauses or annexes are either numbered starting
from 101 or are designated as Annex AA, BB, CC etc. However, it should be noted that these clauses and
subclauses are not indicated as additions in the text.
EN 12067-2 compliance for electronic fuel/air ratio control system cannot be claimed based upon SIL
classification in accordance with EN 61508.
SIL classification cannot be claimed based upon compliance with this document only. A supplementary
method for SIL determination is specified in EN 13611:2019, Annex J.
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1 Scope
This document specifies the safety, construction and performance requirements for electronic fuel/air
ratio control system (ERC), electronic fuel/air ratio supervision system (ERS) and electronic fuel/air
ratio trim system (ERT) intended for use with burners and appliances burning gaseous or liquid fuels. It
also describes the test procedures for evaluating these requirements and specifies information
necessary for installation and use.
This document is applicable to
— closed loop fuel/air ratio control systems, see 3.101;
— fuel/air ratio supervision systems, see 3.102;
— closed loop fuel/air ratio
...