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 BS EN 12067-2:2004 This British Standard was published under the authorit
2、y 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 12067-2:2004. The UK participation in its preparation was entrusted by Technical Committee GSE/22, Safety and co
3、ntrol 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 represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Sta
4、ndards 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 Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. Th
5、is 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 confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible int
6、ernational/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN
7、 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 CommentsEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM EN120672 March2004 ICS23.060.40;27.060.20 Englishvers
8、ion Gas/airratiocontrolsforgasburnersandgasburning appliancesPart2:Electronictypes Dispositifsdergulationdurapportair/gazpourbrleurs gazetappareilsgazPartie2:Dispositifslectroniques GasLuftVerbundregeleinrichtungenfrGasbrennerund GasgerteTeil2:ElektronischeAusfhrung ThisEuropeanStandardwasapprovedby
9、CENon2February2004. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheCentr
10、alSecretariatortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheCentralSecretariathasthesamestatusast heofficial versions. CENmembersarethenational
11、standardsbodiesofAustria,Belgium,Cyprus,CzechRepublic,Denmark,Estonia,Finland,France, Germany,Greece,Hungary,Iceland,Ireland,Italy,Latvia,Lithuania,Luxembourg,Malta,Netherlands,Norway,Poland,Portugal, Slovakia, Slovenia,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION CO
12、MITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2004CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.EN120672:2004:EEN120672:2004(E) 2 Contents page Foreword. 4 Introduction 5 1 Scope 6 2 Normativere
13、ferences 6 3 Termsanddefinitions . 6 3.1 electronicgas/airratiocontrol(electronicGARC) . 6 3.2 electroniccontrolbox(ECB) 7 3.3 actuator 7 3.4 sensor 7 3.5 combustionprocess . 7 3.6 definedsafestate 7 3.7 faulttoleratingtime . . 8 3.8 safetyshutdown . 8 3.9 lockout 8 3.9.1 nonvolatilelockout. 8 3.9.2
14、 volatilelockout. . 8 3.10 abnormaloperation. . 8 3.11 formclosureconstruction 8 4 Classification . 9 5 Unitsofmeasurementandtestconditions. 9 6 Constructionrequirements . . 9 6.1 General 9 6.2 Mechanicalrequirements . . 9 6.2.1 General 9 6.2.2 Specialrequirementsforelectromechanicalactuatorswithpos
15、itionfeedbacksensors 10 6.3 Electricalequipment 10 6.3.1 General 10 6.3.2 Classofprotection. 10 6.3.3 Electronicsandsoftware . 10 7 Functionalrequirements. 10 7.1 General 10 7.2 Burnercontrolinterface . 11 7.3 SafetyshutdowninitiatedbytheelectronicGARC. 11 7.4 Startupsequence . 11 7.5 Preset/predefi
16、nedrange. . 11 7.6 Restartfromdefinedsafestate . 11 7.7 Accuracyrequirements. . 11 7.7.1 General 11 7.7.2 Sensor(s)andactuators . . 12 7.7.3 Repeatability 12 7.8 Protectionagainstinternalfaults . 12 7.8.1 Failuremodesofcomponents . 12 7.8.2 Safetyclass . 12 7.9 Informationtobesuppliedbythemanufactur
17、er 12 7.10 Documentation 13 7.11 Assessment . 13 8 Protectionagainstenvironmentalinfluences. 13 8.1 General 13EN120672:2004(E) 3 8.2 Testconditions . . 13 8.3 Performancetests . 14 8.3.1 Atambienttemperature . 14 8.3.2 Atlowtemperature 14 8.3.3 Athightemperature . 14 8.4 Void 14 8.5 Endurance . 14 8
18、.5.1 General 14 8.5.2 Vibrationtest 15 8.5.3 Humidity. 15 8.6 EMCrequirements 15 8.6.1 General 15 8.6.2 Supplyvoltagevariations. 15 8.6.3 Supplyvoltageinterruptionsordecreases . . 15 8.6.4 Supplyfrequencyvariations . . 16 8.6.5 Surgeimmunity 16 8.6.6 Electricalfasttransientburst . 16 8.6.7 Electroma
19、gneticconductedandradiateddisturbancesinducedbyradiofrequency fields16 8.6.8 Electrostaticdischargeimmunity . 16 9 Markingandinstallation . 16 9.1 Marking 16 9.2 Installationandoperatinginstructions . 16 9.3 Warningnote . 17 AnnexA (informative) ApprovalpathfortheelectronicGARC . 18 AnnexB (normativ
20、e) Manufacturersdeclarationforsensors,actuatorsandrepeatability 19 AnnexC (normative) Specialrequirementsforsinglepositionfeedbackpotentiometersin electromechanicalactuators 23 AnnexZA(informative) ClausesofthisEuropeanStandardaddressingessential requirementsorotherprovisionsofEUDirectives 24EN12067
21、2:2004(E) 4 Foreword Thisdocument(EN120672:2004)hasbeenpreparedbyTechnicalCommitteeCEN/TC58,“Safetyand controldevicesforgasburnersandgasburningappliances“,thesecretariatofwhichisheldbyBSI. ThisEuropeanStandardshallbegiventhestatusofanationalstandard,eitherbypublicationofanidentical textorbyendorseme
22、nt,atthelatestbySeptember2004,andconflictingnationalstandardsshallbe withdrawnatthelatestbySeptember2004. ThisdocumenthasbeenpreparedunderamandategiventoCENbytheEuropeanCommissionandthe EuropeanFreeTradeAssociation,andsupportsessentialrequirementsofEUDirective(s). ForrelationshipwithEUDirective(s),s
23、eeinformativeannexZA,whichisanintegralpartofthisdocument. ThisEuropeanStandardcoverstypetestingonly. ThisstandardrecognizesthesafetylevelspecifiedbyCEN/TC58dealingwiththesafety,constructionand performanceofcontrolsforGasBurnersandGasBurningAppliancesandtotheirtesting. AnnexAisinformative.AnnexesBand
24、Carenormative. AccordingtotheCEN/CENELECInternalRegulations,thenationalstandardsorganizationsofthefollowing countriesareboundtoimplementthisEuropeanStandard:Austria,Belgium,Cyprus,CzechRepublic, Denmark,Estonia,Finland,France,Germany,Greece,Hungary,Iceland,Ireland,Italy,Latvia,Lithuania, Luxembourg,
25、Malta,Netherlands,Norway,Poland,Portugal,Slovakia,Slovenia,Spain,Sweden,Switzerland andUnitedKingdom.EN120672:2004(E) 5 Introduction Forelectronicgas/airratiocontrolsystems(GARC)therearenumeroussolutionsforspecificapplicationsin themarket.ForthatreasonTC58decidedtodraftastandardfortypetestingforclos
26、edloopelectronic GARConly. Thisstandarddoesnotoverriderequirementsofrelevantappliancestandards. Thisstandarddoesnotdifferentiateintoclassificationbyheatinputorrelatestoapplications.WhenGARCs arefittedtoappliancesthesafetyoftheapplianceshouldnotbereducedbyanynormalorabnormal operationoftheGARCdescrib
27、edinthisstandard. Theaccuracyofactualgas/airratioisnotspecifiedasafixedvalueinthisstandard. Thestandardspecifieswhichparametershavetobedeclaredbythemanufacturerandunderwhat conditionsthesehavetobefulfilled.TheseparameterswillrelatetotheGARCratherthanthecombustion process. Thestandarddoesnotincludeas
28、tandardtestrig,howeverthepurposeofthetestsistoverifythe manufacturersdeclarationundertheconditionsrequiredinthestandard.EN120672:2004(E) 6 1Scope ThisEuropeanStandardspecifiesthesafety,constructionandperformancerequirementsforelectronic gas/airratiocontrolsystems(GARCs)intendedforusewithgasburnersan
29、dgasburningappliances.Italso describesthetestproceduresforevaluatingtheserequirementsandspecifiesinformationnecessaryfor installationanduse. Thisstandardisonlyapplicabletoclosedloopgas/airratiocontrols(see3.1)anddoesnotdifferentiateinto classificationbyheatinput. ThisstandardappliestoelectronicGARCs
30、thatcanbetestedindependently,aswellaspartofanappliance oragasburner. 2 Normativereferences ThisEuropeanStandardincorporatesbydatedorundatedreference,provisionsfromotherpublications. Thesenormativereferencesarecitedattheappropriateplacesinthetext,andthepublicationsarelisted hereafter.Fordatedreferenc
31、es,subsequentamendmentstoorrevisionsofanyofthesepublicationsapply tothisEuropeanStandardonlywhenincorporatedinitbyamendmentorrevision.Forundatedreferences thelatesteditionofthepublicationreferredtoapplies(includingamendments). EN298:2003;Automaticgasburnercontrolsystemsforgasburnersandgasburningappl
32、ianceswithor withoutfans. EN13611:2000,SafetyandcontroldevicesforgasburnersandgasburningappliancesGeneral requirements. ENV14459:2002, Methodofriskanalysisandrecommendationsfortheuseofelectronicsinsystemsforthe controlofgasburnersandgasburningappliances. EN6006826:1995, EnvironmentaltestingPart2:Tes
33、tsTestsFc:Vibration(sinusoidal)(IEC600682 6:1995+Corrigendum1995). EN60529, Degreesofprotectionprovidedbyenclosures(IPCode)(IEC60529:1989). EN607301:2000,AutomaticelectricalcontrolsforhouseholdandsimilarusePart 1:General requirements(IEC607301:1999,modified). EN6073025, Automaticelectricalcontrolsfo
34、rhouseholdandsimilarusePart25:Particularrequirements forautomaticelectricalburnercontrolsystems(IEC6073025:2000,modified). EN61000411, Electromagneticcompatibility(EMC)Part4:Testingandmeasurementtechniques Section11:Voltagedips,shortinterruptionsandvoltagevariationsimmunitytests(IEC61000411:1994). 3
35、 Termsanddefinitions ForthepurposesofthisEuropeanStandard,thefollowingtermsanddefinitionsapply. 3.1 electronicgas/airratiocontrol(electronicGARC) closedloopmodulatingsystemconsistingoftheelectroniccontrol,actuatingelementsforthegasflowand theairflowasaminimum,andallocatedfeedbacksignal(s),seeFigure1
36、EN120672:2004(E) 7 Figure1ScopeoftheelectronicGARC 3.2 electroniccontrolbox(ECB) electronicmaincontrolmoduleincorporatingallinputsandoutputsforthecontrollingelements 3.3 actuator deviceforcontrollingtheamountofgasand/orair 3.4 sensor devicewhichgivesasignalrelatedtoaphysicalpropertytowhichitresponds
37、 3.5 combustionprocess chemicalreactionbetweengasandairtoproduceheat 3.6 definedsafestate stateofthesystemwiththefollowingcharacteristics: a) thesystempassivelyassumesastateinwhichtheoutputterminalsensureasafesituationunderall circumstancesor; b) thesystemactivelyexecutesaprotectiveactioncausingitto
38、shutdownandlockout,or; c) thesystemremainsinoperation,continuingtosatisfyallsafetyrelatedfunctionalrequirementsEN120672:2004(E) 8 3.7 faulttoleratingtime timebetweentheoccurrenceofafaultandtheshutdownoftheburner,whichistoleratedbytheapplication withoutcreatingahazardoussituation(Figure2) Faulttolera
39、tingtimeFaultdetectiontime FaultreactiontimeFaultoccurs Faultflagged Shutdown III Figure2Faulttoleratingtime 3.8 safetyshutdown processwhichiseffectedimmediatelyfollowingtheresponseofaprotectiondeviceorthedetectionofafault intheelectronicGARCandplacestheburneroutofoperation;theresultingstateofthesys
40、temisdefinedby deactivatedterminalsforthegasshutoffvalvesandtheignitiondevice definition3.17ofEN298:2003 3.9 lockout 3.9.1 nonvolatilelockout safetyshutdownconditionofthesystem,suchthatarestartcanonlybeaccomplishedbyamanualresetof thesystemandbynoothermeans definition3.18.1ofEN298:2003 3.9.2 volatil
41、elockout safetyshutdownconditionofthesystem,suchthatarestartcanonlybeaccomplishedbyeitheramanual resetofthesystemoraninterruptionofthemainspoweranditssubsequentrestoration definition3.18.2of EN298:2003 3.10 abnormaloperation operationoftheapplianceundertheeffectofinternalfailuresorundertheeffectoffo
42、reseeableinfluences outsidethespecifiedoperationalconditionsdefinition3.19ofENV14459:2002 3.11 formclosureconstruction constructionensuringnonslippageEN120672:2004(E) 9 4Classification Therearenoclassificationsusedinthisstandard. 5 Unitsofmeasurementandtestconditions AccordingtoEN13611:2000;clause5.
43、 6Construction requirements 6.1General TheGARCshallconsistofatleasttwoactuatorsandsensors(seeFigure1andTable1whichshallbe consideredtogether).Itshallhavecontinuousselfcheckingfunctions;inmodeswhichmayberelevant,e.g. operatingmode,standbymode,startupmodeandshutdownmode.Thecompletesystemshallincludethe peripheralelements,e.g.servomotors,actuators,positionaldevices,sensors,variablespeedcontrolsfor combustionairfansandcombustionanalysisfeedbacksystems. Table1Acceptablefeedbacktypes Actuatorfeedback Actuatoroutput feedback Processfeedback Position b Speed Flow/D P PG
