Multifunctional controls for gas burning appliances

This European Standard specifies the safety, construction and performance requirements for multifunctional
controls intended for use with gas burners, gas appliances and similar use, 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 functions, 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).

Mehrfachstellgeräte für Gasgeräte

Diese Europäische Norm legt die Sicherheits-, Bau- und Funktionsanforderungen an Mehrfachstellgeräte für Gasbrenner und Gasgeräte und ähnliche Anwendungen, nachstehend Mehrfachstellgeräte genannt, fest.
Diese Europäische Norm gilt für Mehrfachstellgeräte mit einem angegebenen höchsten Eingangsdruck bis einschließlich 50 kPa (500 mbar) mit Anschlussnennweiten bis einschließlich DN 150 zur Verwendung mit einem oder mehreren Brenngas(en) nach EN 437.
Mehrfachstellgeräte haben zwei oder mehr Funktionen, die durch mindestens ein mechanisches Regel- und Steuergerät dargestellt und in den jeweiligen RS-Normen festgelegt sind (siehe Bild 1). EN 126 gilt nicht für rein elektronische Mehrfachstellgeräte (z. B. eine Kombination aus EN 298 und EN 1643).

Equipements multifonctionnels pour les appareils à gaz

La présente Norme européenne prescrit les exigences de sécurité, de construction et de fonctionnement
relatives aux équipements auxiliaires multifonctionnels pour brûleurs à gaz, appareils à gaz et équipements
similaires, dénommés ci-après «MFC».
Elle s'applique aux MFC dont la pression amont maximale est inférieure ou égale à 50 kPa (500 mbar), de
diamètre nominal de raccordement inférieur ou égal à DN 150, et pour utilisation d’un ou plusieurs des gaz en
conformité avec l’EN 437.
Un MFC comporte au moins deux fonctions, dont au moins une est une commande mécanique, selon les
spécifications des normes applicables sur les équipements auxiliaires (voir Figure 1). Les équipements
multifonctionnels uniquement à base d’électronique ne relèvent pas de l’EN 126 (par exemple une
combinaison de fonctions selon l’EN 298 et l’EN 1643).

Večnamenske naprave za nadzor plinskih aparatov

Ta evropski standard določa zahteve v zvezi z varnostjo, izdelavo in lastnostmi za večnamenske naprave za nadzor (MFC) plinskih gorilnikov, aparatov in podobno uporabo, v nadaljevanju: »večnamenske naprave«. Ta evropski standard se uporablja za večnamenske naprave z deklariranim najvišjim vhodnim tlakom do vključno 50 kPa (500 mbar) nazivnih velikosti priključkov do vključno DN 150 za uporabo z enim ali več gorivnih plinov v skladu s standardom EN 437. Večnamenske naprave imajo vsaj dve funkciji, pri čemer je najmanj ena mehanski nadzor, kakor je določeno v ustreznih nadzornih standardih. Večnamenske naprave, ki temeljijo le na elektroniki, niso zajete v standardu EN 126 (primer je kombinacija funkcij v skladu s standardoma EN 298 in EN 1643).

General Information

Status
Published
Publication Date
27-Mar-2012
Current Stage
9060 - Closure of 2 Year Review Enquiry - Review Enquiry
Due Date
02-Sep-2017
Completion Date
02-Sep-2017

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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Mehrfachstellgeräte für GasgeräteEquipements multifonctionnels pour les appareils à gazMultifunctional controls for gas burning appliances27.060.20Plinski gorilnikiGas fuel burners23.060.99Drugi ventiliOther valvesICS:Ta slovenski standard je istoveten z:EN 126:2012SIST EN 126:2012en,fr,de01-september-2012SIST EN 126:2012SLOVENSKI

STANDARDSIST EN 126:20041DGRPHãþD
SIST EN 126:2012
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 126
March 2012 ICS 23.060.40 Supersedes EN 126:2004English Version
Multifunctional controls for gas burning appliances
Equipements multifonctionnels pour les appareils à gaz

Mehrfachstellgeräte für Gasgeräte This European Standard was approved by CEN on 30 December 2011.

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, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre:
Avenue Marnix 17,

B-1000 Brussels © 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 126:2012: ESIST EN 126:2012

EN 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 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 appliances ......................................................................................... 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 Installation 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 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 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 ................................................................................................................ 21SIST EN 126:2012

EN 126:2012 (E) 3 AA.2 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 2009/142/EC relating to appliances burning gaseous fuels ........ 22Bibliography ...................................................................................................................................................... 24

Figures 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 — Correspondence between this European Standard and Directive 2009/142/EC relating to appliances burning gaseous fuels (2 of 2) ............................................................................................. 23 SIST EN 126:2012

EN 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 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 September 2012, and conflicting national standards shall be withdrawn at the latest 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 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 clauses 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 particular 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 following 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 but 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 Internal 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, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.

SIST EN 126:2012

EN 126:2012 (E) 5 Introduction The general requirements for controls are given in EN 13611:2007+A2:2011 and methods for classification and assessment 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 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(pressure 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 EN 88-1 b) EN 125 EN 161 EN 257 EN 298 EN 1106 EN 1643 EN 12067-2 EN 88-2

EN 126a)EN 1854 SIST EN 126:2012

EN 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, 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 functions, 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 documents, 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 instantaneous water heaters for the production of domestic hot water, fitted with atmospheric burners EN 88-1, Pressure regulators and associated safety

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