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1、BRITISH STANDARD BS EN 12067-2:2004 Gas/air ratio controls for gas burners and gas burning appliances Part 2: Electronic types The European Standard EN 12067-2:2004 has the status of a British Standard ICS 23.060.40; 27.060.20 ? Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 15:31:46 GMT+00:
2、00 2006, Uncontrolled Copy, (c) BSI BS EN 12067-2:2004 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 5 April 2004 BSI 5 April 2004 ISBN 0 580 43627 6 National foreword This British Standard is the official English language version of EN 120
3、67-2:2004. The UK participation in its preparation was entrusted by Technical Committee GSE/22, Safety and control devices for gas burners and gas burning appliances, to Subcommittee GSE/22/19, Pneumatic air/gas ratio controls and governors, which has the responsibility to: A list of organizations r
4、epresented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence
5、 Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself
6、 confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and pro
7、mulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 25 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date
8、Comments Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 15:31:46 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12067-2 March 2004 ICS 23.060.40; 27.060.20 English version Gas/air ratio controls for gas burners and gas burning appliances - Par
9、t 2: Electronic types Dispositifs de rgulation du rapport air/gaz pour brleurs gaz et appareils gaz - Partie 2: Dispositifs lectroniques Gas-Luft-Verbundregeleinrichtungen fr Gasbrenner und Gasgerte - Teil 2: Elektronische Ausfhrung This European Standard was approved by CEN on 2 February 2004. CEN
10、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 appli
11、cation 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 translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has t
12、he same status as the official versions. 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, Slova
13、kia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2004 CENAll rights of exploitation in any form and by any means reserved worldwide
14、 for CEN national Members. Ref. No. EN 12067-2:2004: E Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 15:31:46 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 12067-2:2004 (E) 2 Contents page Foreword. 4 Introduction 5 1Scope 6 2Normative references 6 3Terms and definitions. 6 3.1electronic ga
15、s/air ratio control (electronic GARC). 6 3.2electronic control box (ECB) 7 3.3actuator 7 3.4sensor 7 3.5combustion process. 7 3.6defined safe state 7 3.7fault tolerating time 8 3.8safety shut-down . 8 3.9lock-out 8 3.9.1non-volatile lock-out. 8 3.9.2volatile lock-out 8 3.10abnormal operation 8 3.11f
16、orm closure construction 8 4Classification . 9 5Units of measurement and test conditions. 9 6Construction requirements 9 6.1General 9 6.2Mechanical requirements 9 6.2.1General 9 6.2.2Special requirements for electromechanical actuators with position feed-back sensors 10 6.3Electrical equipment 10 6.
17、3.1General 10 6.3.2Class of protection. 10 6.3.3Electronics and software . 10 7Functional requirements. 10 7.1General 10 7.2Burner control interface. 11 7.3Safety shut-down initiated by the electronic GARC. 11 7.4Start-up sequence . 11 7.5Preset/predefined range 11 7.6Restart from defined safe state
18、 . 11 7.7Accuracy requirements 11 7.7.1General 11 7.7.2Sensor(s) and actuators 12 7.7.3Repeatability 12 7.8Protection against internal faults . 12 7.8.1Failure modes of components. 12 7.8.2Safety class . 12 7.9Information to be supplied by the manufacturer 12 7.10Documentation 13 7.11Assessment. 13
19、8Protection against environmental influences. 13 8.1General 13 Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 15:31:46 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 12067-2:2004 (E) 3 8.2Test conditions 13 8.3Performance tests . 14 8.3.1At ambient temperature. 14 8.3.2At low temperature 14 8
20、.3.3At high temperature. 14 8.4Void 14 8.5Endurance . 14 8.5.1General 14 8.5.2Vibration test 15 8.5.3Humidity. 15 8.6EMC-requirements 15 8.6.1General 15 8.6.2Supply voltage variations. 15 8.6.3Supply voltage interruptions or decreases 15 8.6.4Supply frequency variations 16 8.6.5Surge immunity 16 8.6
21、.6Electrical fast transient burst . 16 8.6.7Electromagnetic conducted and radiated disturbances induced by radio-frequency fields 16 8.6.8Electrostatic discharge immunity. 16 9Marking and installation . 16 9.1Marking 16 9.2Installation and operating instructions. 16 9.3Warning note . 17 Annex A (inf
22、ormative) Approval path for the electronic GARC. 18 Annex B (normative) Manufacturers declaration for sensors, actuators and repeatability 19 Annex C (normative) Special requirements for single position feed-back potentiometers in electromechanical actuators 23 Annex ZA (informative) Clauses of this
23、 European Standard addressing essential requirements or other provisions of EU Directives 24 Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 15:31:46 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 12067-2:2004 (E) 4 Foreword This document (EN 12067-2:2004) has been prepared by Technical Commit
24、tee CEN /TC 58, “Safety and control devices for gas-burners and gas-burning appliances“, 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 September 2004, an
25、d conflicting national standards shall be withdrawn at the latest by September 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 Directive(s). For relationship with EU Direc
26、tive(s), see informative annex ZA, which is an integral part of this document. This European Standard covers type testing only. This standard recognizes the safety level specified by CEN/TC 58 dealing with the safety, construction and performance of controls for Gas Burners and Gas Burning Appliance
27、s and to their testing. Annex A is informative. Annexes B and C are normative. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia,
28、 Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 15:31:46 GMT+00:00 2006, Uncontr
29、olled Copy, (c) BSI EN 12067-2:2004 (E) 5 Introduction For electronic gas/air ratio control systems (GARC) there are numerous solutions for specific applications in the market. For that reason TC 58 decided to draft a standard for type testing for closed loop electronic GARC only. This standard does
30、 not override requirements of relevant appliance standards. This standard does not differentiate into classification by heat input or relates to applications. When GARCs are fitted to appliances the safety of the appliance should not be reduced by any normal or abnormal operation of the GARC describ
31、ed in this standard. The accuracy of actual gas/air ratio is not specified as a fixed value in this standard. The standard specifies which parameters have to be declared by the manufacturer and under what conditions these have to be fulfilled. These parameters will relate to the GARC rather than the
32、 combustion process. The standard does not include a standard test rig, however the purpose of the tests is to verify the manufacturers declaration under the conditions required in the standard. Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 15:31:46 GMT+00:00 2006, Uncontrolled Copy, (c) BS
33、I EN 12067-2:2004 (E) 6 1 Scope This European Standard specifies the safety, construction and performance requirements for electronic gas/air ratio control systems (GARCs) intended for use with gas burners and gas burning appliances. It also describes the test procedures for evaluating these require
34、ments and specifies information necessary for installation and use. This standard is only applicable to closed loop gas/air ratio controls (see 3.1) and does not differentiate into classification by heat input. This standard applies to electronic GARCs that can be tested independently, as well as pa
35、rt of an appliance or a gas burner. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text, and the publications are listed hereafter. For dated reference
36、s, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies (including amendments). EN 298:2003; Automatic gas burner cont
37、rol systems for gas burners and gas burning appliances with or without fans. EN 13611:2000, Safety and control devices for gas burners and gas-burning appliances - General requirements. ENV 14459:2002, Method of risk analysis and recommendations for the use of electronics in systems for the control
38、of gas burners and gas burning appliances. EN 60068-2-6:1995, Environmental testing - Part 2: Tests Tests Fc: Vibration (sinusoidal) (IEC 60068-2- 6:1995 + Corrigendum 1995). EN 60529, Degrees of protection provided by enclosures (IP Code) (IEC 60529:1989). EN 60730-1:2000, Automatic electrical cont
39、rols for household and similar use Part 1: General requirements (IEC 60730-1:1999, modified). EN 60730-2-5, Automatic electrical controls for household and similar use - Part 2-5: Particular requirements for automatic electrical burner control systems (IEC 60730-2-5:2000, modified). EN 61000-4-11, E
40、lectromagnetic compatibility (EMC) Part 4: Testing and measurement techniques Section 11: Voltage dips, short interruptions and voltage variations immunity tests (IEC 61000-4-11:1994). 3 Terms and definitions For the purposes of this European Standard, the following terms and definitions apply. 3.1
41、electronic gas/air ratio control (electronic GARC) closed loop modulating system consisting of the electronic control, actuating elements for the gas flow and the air flow as a minimum, and allocated feedback signal(s), see Figure 1 Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 15:31:46 GMT
42、+00:00 2006, Uncontrolled Copy, (c) BSI EN 12067-2:2004 (E) 7 Figure 1 Scope of the electronic GARC 3.2 electronic control box (ECB) electronic main control module incorporating all inputs and outputs for the controlling elements 3.3 actuator device for controlling the amount of gas and/or air 3.4 s
43、ensor device which gives a signal related to a physical property to which it responds 3.5 combustion process chemical reaction between gas and air to produce heat 3.6 defined safe state state of the system with the following characteristics: a) the system passively assumes a state in which the outpu
44、t terminals ensure a safe situation under all circumstances or; b) the system actively executes a protective action causing it to shut down and lock out, or; c) the system remains in operation, continuing to satisfy all safety related functional requirements Licensed Copy: sheffieldun sheffieldun, n
45、a, Sat Oct 28 15:31:46 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 12067-2:2004 (E) 8 3.7 fault tolerating time time between the occurrence of a fault and the shut down of the burner, which is tolerated by the application without creating a hazardous situation (Figure 2) Fault tolerating time Faul
46、t detection timeFault reaction time Fault occurs Fault flagged Shut down I-I-I Figure 2 Fault tolerating time 3.8 safety shut-down process which is effected immediately following the response of a protection device or the detection of a fault in the electronic GARC and places the burner out of opera
47、tion; the resulting state of the system is defined by deactivated terminals for the gas shut-off valves and the ignition device definition 3.17 of EN 298:2003 3.9 lock-out 3.9.1 non-volatile lock-out safety shut-down condition of the system, such that a restart can only be accomplished by a manual r
48、eset of the system and by no other means definition 3.18.1 of EN 298:2003 3.9.2 volatile lock-out safety shut-down condition of the system, such that a restart can only be accomplished by either a manual reset of the system or an interruption of the mains power and its subsequent restoration definit
49、ion 3.18.2 of EN 298:2003 3.10 abnormal operation operation of the appliance under the effect of internal failures or under the effect of foreseeable influences outside the specified operational conditions definition 3.19 of ENV 14459:2002 3.11 form closure construction construction ensuring non-slippage Licensed Copy: sheffieldun sheffieldun, na, Sat