1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 126:2012Multifunctional controls for gasburning appliancesBS EN 126:2012 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 126:2012. Its
2、upersedes BS EN 126:2004 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee GSE/22, Safety and control devices for gas and oilburners and gas burning appliances.A list of organizations represented on this committee can beobtained on request to its secretar
3、y.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2012. Published by BSI StandardsLimited 2012ISBN 978 0 580 72421 3ICS 23.060.40Compliance with a British Standard cannot confe
4、r immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 30 April 2012.Amendments issued since publicationDate Text affectedBS EN 126:2012EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 126 March 2012 ICS 23.060.40
5、 Supersedes EN 126:2004English Version Multifunctional controls for gas burning appliances Equipements multifonctionnels pour les appareils gaz Mehrfachstellgerte fr Gasgerte This European Standard was approved by CEN on 30 December 2011. CEN members are bound to comply with the CEN/CENELEC Internal
6、 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
7、 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 versio
8、ns. 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, Romania, Slovakia, Slov
9、enia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2012 CEN All rights of exploitation in any form and by any means reserved worldwide f
10、or CEN national Members. Ref. No. EN 126:2012: EBS EN 126:2012EN 126:2012 (E) 2 Contents Page Foreword 4Introduction .51 Scope 62 Normative references 63 Terms and definitions .74 Classification 74.1 Classes of control 74.2 Groups of control.74.3 Classes of control functions 75 Units of measurement
11、and test conditions .86 Construction requirements .86.101 General 86.102 MFC based on combination of controls 86.102.1 General 86.102.2 Interaction between Controls .96.102.3 Alternative gas connections .96.103 MFC based on Application Control Functions 106.103.1 Assessment for ACFs in gas appliance
12、s . 106.103.2 Gas shut-off control function 107 Performance 107.101 General . 107.102 External leak-tightness of MFC . 107.103 Thermostat function . 107.104 Internal leak tightness of MFC . 108 EMC/Electrical requirements . 109 Marking, installation and operating instructions 119.1 Marking 119.2 Ins
13、tallation and operating instructions 119.3 Warning notice 11Annex A (informative) Gas connections in common use in the various countries . 12Annex B (informative) Leak-tightness test volumetric method 13Annex C (informative) Leak-tightness test pressure loss method . 14Annex D (normative) Conversion
14、 of pressure loss into leakage rate . 15Annex E (normative) Electrical/electronic component fault modes . 16Annex F (normative) Additional requirements for safety accessories and pressure accessories as defined in EC Directive 97/23/EC . 17Annex G (normative) Materials for pressurized parts 18Annex
15、H (informative) Additional materials for pressurized parts 19Annex I (normative) Requirements for controls used in DC supplied gas burners and gas burning appliances . 20Annex AA (normative) Automatic water operated gas valve . 21AA.1 Construction requirements 21BS EN 126:2012EN 126:2012 (E) 3 AA.2
16、Performance requirements . 21AA.2.1 Sealing force 21AA.2.2 Endurance 21AA.2.3 Test of automatic water-operated gas valves. 21AA.2.4 Flow rate and leak-tightness after endurance 21Annex ZA (informative) Relationship between this European Standard and the Essential Requirements of EU Directive 2009/14
17、2/EC relating to appliances burning gaseous fuels 22Bibliography 24Figures Figure 1 Standards house . 5Tables Table 1 External leakage rate 10Table ZA Correspondence between this European Standard and Directive 2009/142/EC relating to appliances burning gaseous fuels (1 of 2) . 22Table ZA Correspond
18、ence between this European Standard and Directive 2009/142/EC relating to appliances burning gaseous fuels (2 of 2) . 23BS EN 126:2012EN 126:2012 (E) 4 Foreword This document (EN 126:2012) has been prepared by Technical Committee CEN/TC 58 “Safety and control devices for burners and appliances burni
19、ng 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 September 2012, and conflicting national standards shall be withdrawn at the l
20、atest by September 2012. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 126:2004. This document has been
21、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 Directive(s), see informative Annex ZA, which is an integral part of this document. This document refers to claus
22、es of EN 13611:2007+A2:2011 or adapts it 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 sub-clauses to the structure of EN 13611:2007+A2:2011 which are parti
23、cular to this standard, i.e. sub-clauses or annexes which are additional to those in EN 13611:2007+A2:2011 are numbered starting from 101 or are designated as Annex AA, BB, CC etc. It should be noted that these clauses and sub-clauses are not indicated as an addition. It should be noted that the fol
24、lowing significant technical changes have been made to the document since the previous edition: a) alignment with EN 13611:2007+A2:2011; b) the maximum inlet pressure is increased to 50 kPa (500 mbar); c) it is no longer necessary for at least one of the control functions to be a shut-off function b
25、ut combinations of electronic controls only are excluded; d) introduction of Application Control Function in the scope (see 3.103, 6.103); e) referencing the control standards as shown in Figure 1 in total, instead of referencing these standards clause by clause. According to the CEN/CENELEC Interna
26、l Regulations, the national standards organizations 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, Luxembou
27、rg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 126:2012EN 126:2012 (E) 5 Introduction The general requirements for controls are given in EN 13611:2007+A2:2011 and methods for classification and assessmen
28、t for new controls and control functions are given in EN 14459:2007, Clauses 1 up to and including 7.13 (see Figure 1). The requirements for controls are given in the specific control standard EN 126 (see Figure 1) specifies multifunctional controls with two or more controls and Application Control
29、Functions, e.g. the Gas Shut-off Control Function, being inherently multifunctional controls, see 6.103. Key a) This European Standard specifies automatic water operated gas valves in Annex AA b) EN 12067-1 (Gas/air ratio controls) and EN 12078 (Zero governors) were merged into the new EN 88-1(press
30、ure regulators). Figure 1 Standards house Each control integrated in the MFC shall meet the applicable requirements of the relevant control standard(s). In addition, this standard covers requirements for the safety related interactions between the different devices. EN 13611 + EN 14459 Generic part
31、EN 88-1b)EN125 EN161 EN257 EN298 EN 1106EN 1643EN 12067-2EN 88-2EN 126a)EN 1854BS EN 126:2012EN 126:2012 (E) 6 1 Scope This European Standard specifies the safety, construction and performance requirements for multifunctional controls intended for use with gas burners, gas appliances and similar use
32、, hereafter referred to as ”MFC”. This European Standard is applicable to MFC with declared maximum inlet pressures up to and including 50 kPa (500 mbar) of nominal connection sizes up to and including DN 150 for use with one or more fuel gases in accordance with EN 437. MFC consist of two or more f
33、unctions, at least one of which is a mechanical control, as specified in the relevant control standards (see Figure 1). MFC consisting only of electronics are not covered by EN 126 (an example is a combination of functions according to EN 298 and EN 1643). 2 Normative references The following docume
34、nts, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 26:1997, Gas-fired insta
35、ntaneous water heaters for the production of domestic hot water, fitted with atmospheric burners EN 88-1, Pressure regulators and associated safety devices for gas appliances Part 1: Pressure regulators for inlet pressures up to and including 50 kPa EN 125, Flame supervision devices for gas burning
36、appliances Thermoelectric flame supervision devices EN 161, Automatic shut-off valves for gas burners and gas appliances EN 257, Mechanical thermostats for gas-burning appliances EN 298, Automatic gas burner control systems for gas burners and gas burning appliances with or without fans EN 437, Test
37、 gases Test pressures Appliance categories EN 1106, Manually operated taps for gas burning appliances EN 1643, Valve proving systems for automatic shut-off valves for gas burners and gas appliances EN 1854, Pressure sensing devices for gas burners and gas burning appliances EN 12067-2, Gas/air ratio
38、 controls for gas burners and gas burning appliances Part 2: Electronic types EN 13611:2007+A2:2011, Safety and control devices for gas burners and gas-burning appliances General requirements EN 14459:2007, Control functions in electronic systems for gas burners and gas burning appliances Methods fo
39、r classification and assessment ISO 262, ISO general purpose metric screw threads - Selected sizes for screws, bolts and nuts BS EN 126:2012EN 126:2012 (E) 7 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 13611:2007+A2:2011and the following apply. 3.
40、101 control device which provides functionality as described in the specific control standard 3.102 multifunctional control MFC combination of two or more controls and/or Application Control Function(s) whereby the functional parts cannot operate if separated 3.103 application control function ACF f
41、unction to protect against harm(s) originating from a specific hazard by providing safe operation of gas burners and gas burning appliances Note 1 to entry: The assembly to provide this function may consist of a combination of controls and/or multifunctional control(s) (e.g. actuators, sensors and c
42、ontrol electronics). 3.104 gas shut-off function Appliance Control Function which switches the gas flow off Note 1 to entry: The assembly to provide this Application Control Function may consist of a combination of the following parts: closure members, actuators, sensors and the control electronics.
43、 3.105 automatic shut-off valve valve which opens when energized and closes automatically when de-energized 3.106 closing mechanism part of the actuating mechanism that operates the closure member to the closed position guaranteeing the gas shut-off function with the required tightness 4 Classificat
44、ion 4.1 Classes of control Shall be according to EN 13611:2007+A2:2011, 4.1 with the following addition: The MFC is classified according to the classification of the standards as listed in 6.102.1. 4.2 Groups of control Shall be according to EN 13611:2007+A2:2011, 4.2. 4.3 Classes of control functio
45、ns Shall be according to EN 13611:2007+A2:2011, 4.3 with the following addition: BS EN 126:2012EN 126:2012 (E) 8 Applicable classifications for MFCs are derived from the classification of the respective controls and/or ACFs, as listed in 6.102.1 and 6.103, that are defined to be part of the MFC 5 Un
46、its of measurement and test conditions Shall be according to EN 13611:2007+A2:2011, Clause 5. 6 Construction requirements EN 13611:2007, Clause 6 is replaced with the following: 6.101 General MFC consist of: a combination of controls according to 6.102; a single ACF (see definition 3.103); a combina
47、tion of Control(s) and/or Application Control Function(s) according to 6.103. Requirements for construction of the controls incorporated in the MFC are covered in the relevant control standards. Where no control standard is available the requirements of EN 13611:2007+A2:2011 and EN 14459:2007 are ap
48、plicable. In addition, this standard covers in 6.102.2 requirements for the safety related interactions between the different functions of the MFC. Where there are no requirements for these interactions between two or more controls, a risk assessment shall be performed as given in 6.102.2.2 to ident
49、ify additional requirements. MFCs shall be designed such that access to internal parts requires the use of tools. Blockage of auxiliary canals and orifices shall not lead to an unsafe situation otherwise they shall be protected against blockage by suitable means. 6.102 MFC based on combination of controls 6.102.1 General MFC are based on a combination of the functionality provided by the controls as given by the following list: automatic
