SIST EN 298:2012
(Main)Automatic burner control systems for burners and appliances burning gaseous or liquid fuels
Automatic burner control systems for burners and appliances burning gaseous or liquid fuels
This European Standard specifies the safety, construction and performance requirements for automatic burner control systems, programming units and flame detector devices, intended for use with gas and oil burners and gas and oil burning appliances, with or without fans and similar use. This European Standard is applicable to automatic burner control systems that include additional functions. This European Standard does not cover automatic burner control systems utilizing thermo-electric flame supervision devices.
Feuerungsautomaten für Brenner und Brennstoffgeräte für gasförmige oder flüssige Brennstoffe
Dieses Dokument legt Anforderungen an den Bau und die Funktion, an Prüfverfahren und die Kennzeichnung
von Feuerungsautomaten, an Steuergeräte sowie Flammenwächter für Gas- und Ölbrenner sowie Gas- und
Ölgeräte mit oder ohne Gebläse fest.
Dieses Dokument gilt auch für Feuerungsautomaten, Steuergeräte und die ihnen zugehörigen Flammenwächter,
die zusätzliche Funktionen enthalten.
Feuerungsautomaten, die thermoelektrische Flammenüberwachungseinrichtungen verwenden, sind nicht
Gegenstand dieser Norm.
In dieser Norm wird nur die Typprüfung behandelt.
ANMERKUNG Europäische Normen für Brenner, Geräte oder Prozesse, die Feuerungsautomaten, Steuergeräte oder
Flammenwächter verwenden, können Vorrang vor den Anforderungen der vorliegenden Norm haben.
Systèmes automatiques de commande pour brûleurs et appareils utilisant des combustibles gazeux ou liquides
Le présent document a pour objet de fixer les exigences concernant les caractéristiques de construction et de fonctionnement, la technique des essais et le marquage des systèmes automatiques de commande des brûleurs, les unités de programmation ainsi que les dispositifs de détection de flamme pour les brûleurs et les appareils à gaz et à fioul, avec ou sans ventilateur.
Le présent document s'applique également aux systèmes automatiques de commande des brûleurs, aux unités de programmation ou aux dispositifs de détection de flamme associés comportant des fonctions supplémentaires.
La présente norme ne concerne pas les systèmes automatiques de commande des brûleurs utilisant des dispositifs de détection de flamme thermoélectriques.
Le présent document traite uniquement des essais de type.
NOTE Les normes européennes particulières pour brûleurs, appareils ou processus qui mettent en œuvre des systèmes automatiques de commande des brûleurs, des unités de programmation ou des dispositifs de détection de flamme, peuvent être considérées comme prioritaires par rapport à la présente norme.
Naprave za samodejni nadzor gorilnikov in aparatov na plin ali tekoča goriva
Ta evropski standard določa zahteve v zvezi z varnostjo, izdelavo in lastnostmi za naprave za samodejni nadzor, enote za programiranje in naprave za zaznavanje plamena, namenjene uporabi s plinskimi in oljnimi gorilniki ter aparati na plin in olje, z ali brez ventilatorjev, in za podobne namene. Ta evropski standard se uporablja za naprave za samodejni nadzor gorilnikov z dodatnimi funkcijami. Ta evropski standard ne zajema naprav za samodejni nadzor gorilnikov z uporabo termoelektričnih naprav za nadziranje plamena.
General Information
Relations
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Feuerungsautomaten für Brenner und Brennstoffgeräte für gasförmige oder flüssige BrennstoffeSystèmes automatiques de commande pour brûleurs et appareils utilisant des combustibles gazeux ou liquidesAutomatic burner control systems for burners and appliances burning gaseous or liquid fuels27.060.20Plinski gorilnikiGas fuel burners27.060.10JRULYRLiquid and solid fuel burnersICS:Ta slovenski standard je istoveten z:EN 298:2012SIST EN 298:2012en,fr,de01-september-2012SIST EN 298:2012SLOVENSKI
STANDARDSIST EN 298:2004SIST EN 230:20061DGRPHãþD
SIST EN 298:2012
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 298
May 2012 ICS 27.060.01 English Version
Automatic burner control systems for burners and appliances burning gaseous or liquid fuels
Systèmes automatiques de commande pour brûleurs et appareils utilisant des combustibles gazeux ou liquides
Feuerungsautomaten für Brenner und Brennstoffgeräte für gasförmige oder flüssige Brennstoffe This European Standard was approved by CEN on 9 March 2012.
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 298:2012: ESIST EN 298:2012
EN 298:2012 (E) 2 Contents Page Foreword .41Scope .62Normative references .63Terms and definitions .74Classification . 135Units of measurement and test condition . 136Constructional requirements . 147Performance . 188EMC/Electrical requirements . 309Marking, installation and operating instructions . 34Annex A (informative)
Gas connections in common use in the various countries . 38Annex B (informative)
Leak-tightness test − Volumetric method . 39Annex C (informative)
Leak-tightness − Pressure loss method . 40Annex D (normative)
Conversion of pressure loss into leakage rate . 41Annex E (normative)
Electrical/electronic component fault modes . 42Annex F (normative)
Additional requirements for safety accessories and pressure accessories as defined in EU 97/23/EC . 44Annex G (normative)
Materials for pressurized parts . 45Annex H (informative)
Additional materials for pressurized parts . 46Annex I (normative)
Requirements for controls used in DC supplied fuel burners and fuel burning appliances . 47Annex AA (informative)
Functional characteristics of burner control systems, to be given by the appliance standard . 49Annex BB (informative)
Fault modes of flame sensors . 50Annex CC (informative)
Functional diagrams of oil burner control systems . 52Annex ZA (informative)
Relationship between this European Standard and the Essential Requirements of EU Directive 2009/142/EC relating to appliances burning gaseous fuels . 57Bibliography . 59 SIST EN 298:2012
EN 298:2012 (E) 3 Figures
Figure 1 — Basic functional chain of a typical flame supervision . 7Figure 2 — Basic functional chain of an independent flame detector device . 8Figure 3 — Flame sensors for visible light . 28Figure 4 — Acoustic flame sensor. 29Figure CC.1 — Burner without pilot . 54Figure CC.2 — Burners with pilot which operates only during the ignition time . 55Figure CC.3 — Ignition restoration after loss of sensed flame during running position . 55Figure CC.4 — Recycling after loss of sensed flame during running position . 56Figure CC.5 — Lock-out after loss of sensed flame during running position . 56Figure CC.6 — Lock-out for the non-establishment of the flame signal (during safety time t5) . 56 Tables
Table E.1 — Electrical/electronic component faults modes . 42Table AA.1 — Functional characteristics of gas burner control systems, to be given by the appliance standard . 49Table AA.2 — Functional characteristics of oil burner control systems, to be given by the appliance standard . 49Table BB.1 — Fault modes of flame sensors . 50Table CC.1 — Symbols . 52Table ZA.1 — Correspondence between this European Standard and Directive 2009/142/EC relating to appliances burning gaseous fuels . 57 SIST EN 298:2012
EN 298:2012 (E) 4 Foreword This document (EN 298:2012) 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 November 2012, and conflicting national standards shall be withdrawn at the latest by May 2015. 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 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 the relationship of this document with EU Directive(s), see informative Annex ZA, which is an integral part of this document. This document supersedes EN 230:2005 and EN 298:2003. This document refers to clauses of EN 13611:2007+A2:2011 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 sub-clauses to the structure of EN 13611:2007+A2:2011 which are particular to this standard (EN 298:2012). Additional sub-clauses or annexes are either numbered starting from 101 or are designated as Annex AA, BB, CC etc. It should be noted however that these clauses and sub-clauses are not indicated as additions in the text. The following is a list of significant technical changes between this document and the previous editions:
Alignment with EN 13611:2007+A2:2011; Integration of the requirements from EN 230 (EN 230 is merged into prEN 298); NOTE
If, due to the reference of EN 13611 the term “gas” will be part of a requirement or test, then the term “gas” shall be substituted by the term “fuel”
Requirements from the flame supervision and the reactions in case of loss of flame have been adapted to modifications made in EN 267 and EN 676 and optimised for better understanding; Requirements and tests for “independent flame detectors” have been integrated; New requirements concerning “common cause” have been added; Requirements for the new function “remote reset from lock-out” have been added. EN 298 compliance for burner control systems or flame detector devices cannot be claimed based upon SIL classification according to EN 61508. SIL classification cannot be claimed based upon compliance with this standard only. A supplementary method for SIL determination is specified in EN 13611:2007+A2:2011, Annex J. 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, SIST EN 298:2012
EN 298:2012 (E) 5 Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. SIST EN 298:2012
EN 298:2012 (E) 6 1 Scope This European Standard specifies the safety, construction and performance requirements for automatic burner control systems, programming units and flame detector devices, intended for use with gas and oil burners and gas and oil burning appliances, with or without fans and similar use. This European Standard is applicable to automatic burner control systems that include additional functions. This European Standard does not cover automatic burner control systems utilizing thermo-electric flame supervision devices. NOTE 1 European Standards for burners, appliances or processes which use automatic burner control systems, programming units or flame detectors can override the requirements of this standard. NOTE 2 Provisions for production control are not part of this European Standard. 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 267:2009+A1:2011, Automatic forced draught burners for liquid fuels EN 1643, Valve proving systems for automatic shut-off valves for gas burners and gas appliances 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 for classification and assessment EN 60730-1:2011, Automatic electrical controls for household and similar use — Part 1: General requirements (IEC 60730-1:2010 (modified)) EN 60730-2-5:2002+A1:2004+A11:2005+A2:2010, Automatic electrical controls for household and similar use — Part 2-5: Particular requirements for automatic electrical burner control systems (IEC 60730-2-5:2000+Am1:2004+Am2:2008, (modified)) EN 60947-5-1:2004, Low-voltage switchgear and controlgear — Part 5-1: Control circuit devices and switching elements — Electromechanical control circuit devices (IEC 60947-5-1:2003)
IEV 191, International Electrotechnical Vocabulary — Chapter 191: Dependability and quality of service (Consolidated version included Amendment 1 and Amendment 2); Identical with IEC 60050-191:1990-12 (Consolidated with IEC 60050-191/A1:1993-03 and IEC 60050-191/A2:2002-01) SIST EN 298:2012
EN 298:2012 (E) 7 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 13611:2007+A2:2011 and the following apply. 3.101 flame detector device device by which the presence of a flame is detected and signalled (see Figure 1) Note 1 to entry: Flame detector devices can consist of a flame sensor, an amplifier and a relay for signal transmission. These parts, with the possible exception of the actual flame sensor, can be assembled in a single housing for use in conjunction with a programming unit.
Key 1 automatic burner control system (see 3.110) 2 flame detector device (see 3.101) 3 flame 4 flame sensor (see 3.103) 5 amplifier 6 filter 7 threshold 8 programming unit (see 3.109) 9 shut-off valve (see 3.104) 10 shut-off valve terminal 11 flame signal (see 3.107) 12 flame failure response time (see 3.105.1) 13 sensed flame (see 3.106) Figure 1 — Basic functional chain of a typical flame supervision
3.102 independent flame detector device flame detector device which operates independent of the programming unit to provide the class C control function (see Figure 2) Note 1 to entry: Self-checking functions are incorporated in this type of flame detector device. SIST EN 298:2012
EN 298:2012 (E) 8
Key 1 independent flame detector device (see 3.102) 2 flame 3 flame sensor (see 3.103) 4 amplifier 5 filter 6 threshold 7 flame signal (see 3.107) 8 flame failure detection time (see 3.105.2) 9 sensed flame (see 3.106) Figure 2 — Basic functional chain of an independent flame detector device 3.103 flame sensor device which reacts to the presence of the flame by providing an output signal that is used for further signal processing 3.104 shut-off valve
safety device which releases the fuel flow when energized and stops the fuel flow automatically when de-energized
Note 1 to entry: For further information refer to EN 161 or EN 126 for gas and EN ISO 23553-1 for oil, or to other similar devices if mentioned in the relevant appliance standard. 3.105 time in case of flame failure
3.105.1 flame failure response time
FFRT response time between the loss of a sensed flame and the resulting de-energizing of the shut-off valve terminals
Note 1 to entry: FFRT may be referred to as “extinction safety time” in appliance standards.
3.105.2 flame failure detection time FFDT response time of an independent flame detector device between the loss of a sensed flame and the flame signal indicating the absence of a flame
3.106 sensed flame physical value monitored by the flame sensor 3.107 flame signal signal given by the flame detector device in case of sensed flame SIST EN 298:2012
EN 298:2012 (E) 9 3.108 flame simulation condition which occurs when the flame signal indicates the presence of a flame when in reality no flame is present 3.109 programming unit unit which executes the program, reacts to signals from control and safety devices, gives the control commands, controls the start-up sequence, supervises the burner operation and causes controlled shut-down, and if necessary, safety-shut-down and lock-out Note 1 to entry: The programming unit follows a predetermined sequence of actions and always operates in conjunction with a flame detector device. 3.110 automatic burner control system system comprising at least a programming unit and all the elements of a flame detector device
Note 1 to entry: The various functions of an automatic burner control system can be in one or more housings. 3.111 start position stage where the system is not in lock-out position and has not yet received the start signal but can proceed with the start-up sequence when required Note 1 to entry: At this stage, the output terminals for any shut-off valve and ignition device are not energized. 3.112 start signal signal (e.g. from a thermostat) which releases the system from its start position and commences the predetermined program 3.113 purge forced introduction of air through the combustion chamber and flue passages in order to displace any remaining fuel/air mixture and/or products of combustion 3.114 pre-purge purge which takes place between the start signal and the energization of the shut-off valve or, in the case of gas, the energization of the ignition device, if this comes first 3.115 post-purge purge which takes place immediately following shut-down 3.116 first safety time interval between the pilot shut-off valve, the start shut-off valve or the main shut-off valve, as applicable, being energized and the pilot shut-off valve, start shut-off valve or the main shut-off valve, as applicable, being de-energized if no flame signal is present Note 1 to entry: Where there is no second safety time, this is called the safety time. 3.117 second safety time where there is a first safety time applicable to either a pilot or start fuel flame only, the second safety time is the interval between the main shut-off valve being energized and the main shut-off valve being de-energized if no main flame signal is present SIST EN 298:2012
EN 298:2012 (E) 10 3.118 running position
position of the system in which the burner is in normal operation under the supervision of the programming unit and its flame detector device 3.119 controlled shut-down process by which the power to the shut-off valve(s) is removed before any other action takes place as a result of the action of a controlling function 3.120 safety-shut-down process which is effected immediately following the response of a protection device or the detection of a fault in the automatic burner control system and puts the burner out of operation Note 1 to entry: The resulting state of the system is defined by deactivated terminals for the shut-off valves and the ignition device. 3.121 lock-out
Note 1 to entry: Lock-out can mean non-volatile lock-out or volatile lock-out. 3.121.1 non-volatile lock-out safety-shut-down condition of the system, where a restart can only be accomplished by the manual reset of the system and by no other means 3.121.2 volatile lock-out safety-shut-down condition of the system, where a restart can only be accomplished by either the manual reset of the system, or an interruption of the main power and its subsequent restoration 3.122 Ignition restoration spark restoration process by which, following loss of flame signal, the ignition device is switched on again without total interruption of the fuel supply 3.123 recycling process by which, after a safety-shut-down, a full start-up sequence is automatically repeated 3.124 timings
3.124.1 waiting time for burners without fans, interval between the start signal being given and the energization of the ignition device or shut-off valves, whichever comes first Note 1 to entry: During this time natural ventilation of the combustion chamber and the flue passages can take place. 3.124.2 waiting time interval between the start signal being given (and air registers in purge position, if applicable) and the energization of the ignition device SIST EN 298:2012
EN 298:2012 (E) 11 Note 1 to entry: During this time natural ventilation of the combustion chamber and the flue passages takes place. 3.124.3 pre-purge time period during which purging takes place at the proven air rate prior to the energization of the ignition device or shut-off valves, whichever comes first 3.124.4 pre-purge time period preceding the signal to open the shut-off valve during which the combustion chamber is compulsorily ventilated 3.124.5 post-purge time period during which purging takes place at the proven air rate between any shut-down and the moment the fan is switched off 3.124.6 post-purge time period following the signal to close the shut-off valve during which the combustion chamber is compulsorily ventilated 3.124.7 inter-purge time period during which purging of the combustion chamber takes place at the proven air rate after unsuccessful ignition and prior to the next recycle attempt 3.124.8 inter-waiting time period during which natural ventilation of the combustion chamber takes place after unsuccessful ignition and prior to the next recycle attempt 3.125 sequences
3.125.1 start-up sequence sequence of actions executed by the system which brings the burner from the start position to the running position 3.125.2 first stage part of the start-up sequence which allows the release of start fuel into the combustion chamber 3.125.3 second stage part of the start-up sequence which allows the release of further fuel into the combustion chamber
3.126
system for permanent operation system that is designed to remain in the running position for longer than 24 h without interruption 3.127 system for non-permanent operation system that is designed to remain in the running position for less than 24 h SIST EN 298:2012
EN 298:2012 (E) 12 3.128 self-checking function of the flame detector device automatic internal function of the system which checks the operation of the flame detector device 3.129 air flow simulation condition which occurs when the air flow sensor indicates the presence of air flow when in reality no air flow is present 3.130 spark supervision process of monitoring the ignition spark 3.131 pilot or start fuel flame proving period interval between the end of the first safety time and the beginning of the second safety time which is used to prove that the pilot or start fuel flame is stable 3.132 intermittent first stage first stage that is ignited prior to ignition of the main flame and is shut off simultaneously with the main flame 3.133 interrupted first stage
first stage that is ignited each time the burner is started up and which is extinguished at the end of the second safety time 3.134 burner ignition systems
3.134.1 ignition by supervised gas-fired pilot burner system which releases the main fuel when the ignition burner flame is present 3.134.2 ignition by non-supervised gas-fired pilot burner system in which the release of the main fuel is not prevented by the absence of the flame of the pilot burner 3.135 ignition timings
3.135.1 total ignition time period during which the ignition device is energized
Note 1 to entry: This time includes pre-ignition, ignition and post-ignition times.
3.135.2 pre-ignition time period between the energization of the ignition device and the start of the safety time 3.135.3 ignition time period between the start of the safety time and the first detection of a flame signal Note 1 to entry: The maximum ignition time ends prior to or simultaneous with the safety time when no flame signal has been detected. SIST EN 298:2012
EN 298:2012 (E) 13 3.135.4 post-ignition time period between the first detection of the flame signal and the de-energization of the ignition device 3.136 maximum throughput
mass of oil consumed during one hour at the highest throughput stated by the manufacturer Note 1 to entry: Maximum throughput is expressed in kilograms per hour (kg/h). [SOURCE: EN 267:2009+A1:2011, 3.2.1.1] 3.137 common cause failures failures of different items, resulting from a single event, where these failures are not consequences of each other
Note 1 to entry: Common cause failures should not be confused with common mode failures. [SOURCE: IEV 191-04-23] 4 Classification 4.1 Classes of control Classification is not given for burner control systems or for flame detector devices. 4.2 Groups of control EN 13611:2007+A2:2011, 4.2 is not applicable. 4.3 Classes of control functions Shall be according to EN 13611:2007+A2:2011, 4.3 with the following addition: The burner control system is a class C control function; The flame detector device, if independent from the programming unit, is a class C control function. 5 Units of measurement and test conditions 5.1 Dimensions Shall be according to EN 13611:2007+A2:2011, 5.1. 5.2 Pressures Shall be according to EN 13611:2007+A2:2011, 5.2. 5.3 Bending moments and torques EN 13611:2007+A2:2011, 5.3 is not applicable. 5.4 Test conditions and measurement tolerances Shall be according to EN 13611:2007+A2:2011, 5.4 with the following modifications: SIST EN 298:2012
EN 298:2012 (E) 14 Replace the first 4 paragraphs by the following: Where possible those tests already covered by EN 60730-2-5 shall be combined. Add the following paragraph at the end of the clause: All tests are performed in the order written in this European Standard (i.e. EN 298) except for that of 7.10 and 6.6. 6 Constructional requirements
6.1 General EN 13611:2007+A2:2011, 6.1 is not applicable. 6.2
Mechanical parts of the control
EN 13611:2007+A2:2011, 6.2 is not applicable. 6.3 Materials EN 13611:2007+A2:2011, 6.3 is not applicable. 6.4 Gas connections EN 13611:2007+A2:2011, 6.4 is not applicable. 6.5 Electronic parts of the control 6.5.1 General Shall be according to EN 13611:2007+A2:2011, 6.5.1 with the following addition: NOTE 1 The requirement to include at least two operating elements does not apply to flame detector devices which are not intended to energize shut-off valves directly. The requirement for two independent operating elements can be replaced by a requirement for one operating element for each shut-off valve (two operating elements in total), under the following conditions which guarantee the same overall safety level:
an integrated solution consisting of a Burner control function and a Valve Proving System according to EN 1643 and
the valve proving system checking the leakage during each burner cycle.
NOTE 2 The above requirement does not supersede the other requirements of this document e.g. fault assessment. The construction of any additional functions included in the automatic burner control system, programming unit or flame detector device for which no provisions exist in this standard, shall be such that they do not degrade the safe and correct operation of the automatic burner control system, programming unit or flame detector device. Measures shall be taken to protect against the failure of two (or more) switching elements, due to a common cause, by an external short-circuit that would prevent the burner control system from performing a safety shutdown.
Acceptable methods are current limitation, overcurrent protection device or internal fault detecting functions. SIST EN 298:2012
EN 298:2012 (E) 15 The suitability of measures to maintain the capability to interrupt the energization of the shut-off valve terminals by means of at least one switching element, or by interrupting a non-replaceable overcurrent protection device, shall be verified by the following test. The shut-off valve terminals of the burner control system are connected to a switch that is intended to switch the short-circuit current. With this switch opened, the burner control system is connected as described in EN 60730-1:2011, H.27.1.1.2 with the outputs energized to simulate normal operation (with the contacts of the internal switching elements closed). Where overcurrent protection devices are used as the protective measure, the power supply to the burner control system shall have the capability of supplying an inrush current of at least 500 A. When current limitation techniques are used, the power supply to the burner control system shall not limit the current. A short-circuit is applied between the shut-off valve terminals of the burner control system by closing the switch. The test is terminated if there is no current flow through the switch, or after one hour. If an overcurrent protection device is repl
...
SLOVENSKI STANDARD
oSIST prEN 298:2010
01-julij-2010
1DSUDYH]DVDPRGHMQLQDG]RUJRULOQLNRYLQDSDUDWRYQDSOLQDOLWHNRþDJRULYD
JRULOQLãNLDYWRPDWL
Automatic burner control systems for burners and appliances burning gaseous or liquid
fuels
Feuerungsautomaten für Brenner und Brennstoffgeräte für gasförmige oder flüssige
Brennstoffe
Systèmes automatiques de commande pour brûleurs et appareils utilisant des
combustibles gazeux ou liquides
Ta slovenski standard je istoveten z: prEN 298
ICS:
27.060.10 *RULOQLNLQDWHNRþHLQWUGR Liquid and solid fuel burners
JRULYR
27.060.20 Plinski gorilniki Gas fuel burners
oSIST prEN 298:2010 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN 298:2010
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oSIST prEN 298:2010
EUROPEAN STANDARD
DRAFT
prEN 298
NORME EUROPÉENNE
EUROPÄISCHE NORM
April 2010
ICS 27.060.20 Will supersede EN 230:2005, EN 298:2003
English Version
Automatic burner control systems for burners and appliances
burning gaseous or liquid fuels
Systèmes automatiques de commande pour brûleurs et Feuerungsautomaten für Brenner und Brennstoffgeräte für
appareils utilisant des combustibles gazeux ou liquides gasförmige oder flüssige Brennstoffe
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 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 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
Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2010 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 298:2010: E
worldwide for CEN national Members.
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oSIST prEN 298:2010
prEN 298:2010 (E)
Contents Page
Foreword .5
1 Scope .6
2 Normative references .6
3 Terms and definitions .6
4 Classification . 12
4.1 Classes of control . 12
4.2 Groups of control. 12
4.3 Classes of control functions . 12
5 Units of measurement and test conditions . 12
5.1 Dimensions . 12
5.2 Pressures . 12
5.3 Bending moments and torques . 12
5.4 Test conditions and measurement tolerances . 12
6 Constructional requirements . 13
6.1 General . 13
6.2 Mechanical parts of the control . 13
6.3 Materials . 13
6.4 Gas connections . 13
6.5 Electronic parts of the control . 13
6.6 Protection against internal faults for the purpose of functional safety . 15
7 Performances . 17
7.1 General . 17
7.2 Leak-tightness . 17
7.3 Test for leak-tightness . 17
7.4 Torsion and bending . 17
7.5 Torsion and bending tests . 18
7.6 Rated flow rate . 18
7.7 Test for rated flow rate . 18
7.8 Durability . 18
7.9 Performance tests for electronic controls . 18
7.10 Long-term performance for electronic controls . 19
7.101 Functional requirements . 20
8 EMC/Electrical requirements . 30
8.1 Protection against environmental influences . 30
8.2 Supply voltage variations below 85 % of rated voltage . 31
8.3 Short term voltage interruptions and decreases . 31
8.4 Supply frequency variations . 31
8.5 Surge immunity test . 32
8.6 Electrical fast transient/burst . 32
8.7 Immunity to conducted disturbances . 33
8.8 Immunity to radiated fields . 33
8.9 Electrostatic discharge immunity test . 33
8.10 Power frequency magnetic field immunity test . 33
8.11 Electrical requirements . 34
9 Marking, installation and operating instructions . 34
9.1 Marking . 34
9.2 Installation and operating instructions . 34
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9.3 Warning Notice . 36
Annex A (informative) Gas connections in common use in the various countries . 37
Annex B (informative) Leak-tightness test − Volumetric method . 38
Annex C (informative) Leak-tightness − Pressure loss method . 39
Annex D (normative) Conversion of pressure loss into leakage rate . 40
Annex E (normative) Electrical/electronic component fault modes . 41
Annex F (normative) Additional requirements for safety accessories and pressure accessories as
defined in EU Directive 97/23/EC . 43
Annex G (normative) Materials for pressurized parts . 44
Annex H (informative) Additional materials for pressurized parts . 45
Annex I (normative) Requirements for controls used in DC supplied fuel burners and fuel burning
appliances . 46
Annex AA (informative) Functional characteristics of burner control systems, to be given by the
appliance standard . 48
Annex BB (informative) Fault modes of flame sensing element . 49
Annex CC (informative) Functional diagrams of oil burner controls . 51
Annex ZA (informative) Relationship between this European Standard and the Essential
Requirements of EU Directive 90/396/EEC relating to appliances burning gaseous fuels . 57
Bibliography . 59
Figures
Figure 1 — Flame sensors for visible light . 28
Figure 2 — Acoustic flame sensor . 29
Figure CC.1 — Burner without pilot . 53
Figure CC.2 — Burners with pilot which operates only during the ignition time . 54
Figure CC.3 — Ignition restoration after extinction of flame during operation . 55
Figure CC.4 — Re-cycling after extinction of flame during operation . 55
Figure CC.5 — Lock-out after extinction of flame during operation . 55
Figure CC.6 — Lock-out for the non-establishment of the flame signal (during safety time t ) . 56
5
Tables
Table 1 — Safety times . 25
Table E.1 — Electrical/electronic component faults modes . 41
Table AA.1 — Functional characteristics of gas burner control systems, to be given by the appliance
standard . 48
Table AA.2 — Functional characteristics of oil burner control systems, to be given by the appliance
standard . 48
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Table BB.1 — Fault modes of flame sensing element . 49
Table CC.1 — Symbols . 51
Table ZA.1 — Correspondence between this European Standard and Directive 90/396/EEC relating to
appliances burning gaseous fuels. 57
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Foreword
This document (prEN 298:2010) 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 230:2005, EN 298:2003.
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 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 which are particular to
this standard. It should be noted that these clauses and sub clauses are not indicated as an addition.
During the public enquiry stage this Document refers to some IEC standards, i.e. IEC 60730-1 and
IEC 60730-2-5. These IEC standards are in the process of becoming European Standards. It is the intention
of the responsible working group to update the IEC references to the related EN references, if the revised
EN 60730-1 and EN 60730-2-5 are publicly available before this Document is launched for formal vote.
Note that the following provides details of significant technical changes between this document and the
previous edition:
a) Alignment with EN 13611:2007.
b) Integration of the requirement from EN 230 (EN 230 is merged into prEN 298)
Note: if due to the reference of EN 13611 the term “gas” will be part of a requirement or test, then the
term “gas” shall be substituted by the term “fuel”.
c) Requirements and tests were updated where necessary.
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1 Scope
This document specifies requirements for the construction and function, test methods and marking of
automatic burner control systems, for programming units as well as for flame detector devices for gas and oil
burners and gas and oil burning appliances with or without fans.
This Document also applies to automatic burner control systems, programming units and their associated
flame detector devices that include additional functions.
Automatic burner control systems utilizing thermo-electric flame supervision devices are not covered by this
standard.
This Document covers type testing only.
NOTE European standards for burners, appliances or processes which use automatic burner control systems,
programming units or flame detectors can override the requirements of this standard.
2 Normative references
The following referenced documents are indispensable for the application 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 267:2009, Automatic forced draught burners for liquid fuels
EN 13611:2007 Safety and control devices for gas burners and gas burning appliances ― General requirements
EN 60127-1, Miniature fuses ― Part 1: definitions for miniature fuses and general requirements for miniature
fuse-links (IEC 60127-1:2006)
EN 60947-1:2007, Low-voltage switchgear and controlgear ― Part 1: General rules (IEC 60947-1:2007)
EN 60947-5-1:2004, Low-voltage switchgear and controlgear — Part 5-1: Control circuit devices and switching
elements; electromechanical control circuit devices (IEC 60947-5-1:2003)
IEC 60730-1:2010, Automatic electrical controls for household and similar use — Part 1: General requirements
IEC 60730-2-5:2009, Automatic electrical controls for household and similar use — Part 2-5: Particular
1)
requirements for automatic electrical burner control systems
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 13611:2007 and the following apply.
3.1
flame detector device
device by which the presence of a flame is detected and signalled
NOTE It can consist of a flame sensor, an amplifier and a relay for signal transmission. These parts, with the possible
exception of the actual flame sensor, can be assembled in a single housing for use in conjunction with a programming
unit.
1) The Edition 3.2 combines IEC 60730-2-5 (2000-04), AMD 1 (2004-07) and AMD 2 (2008-11) or IEC 60730-2-5 Edition
3.1 (2004-09) and AMD 2 (2008-11).
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3.2
flame sensor
device which reacts to the presence of the flame by providing an output signal that is used as the input for the
flame detector amplifier
3.3
extinction safety time
flame failure response time
FFRT
response time between loss of sensed flame and the resulting de-energizing of the terminals for the safety shut-
off valves of the burner control system
3.3.1
sensed flame
physical value monitored by the flame sensor
3.3.2
flame signal
signal given by the flame detector device in case of sensed flame
3.4
flame simulation
condition which occurs when the flame signal indicates the presence of a flame when in reality no flame is
present
3.5
programming unit
unit which reacts to signals from control and safety devices, gives control commands, controls the start-up
sequence, supervises the burner operation and causes controlled shut-down, and if necessary safety shut-down
and lock-out
NOTE The programming unit follows a predetermined sequence of actions and always operates in conjunction with a
flame detector device.
3.6
automatic burner control system
system comprising at least a programming unit and all the elements of a flame detector device
NOTE The various functions of an automatic burner control system can be in one or more housings.
3.7
start position
stage, where the system is not in lock-out position, has not yet received the start signal but can proceed with the
start-up sequence when required
NOTE At this stage, the output terminals for any automatic shut-off valve and ignition device are not energized.
3.8
start signal
signal e.g. from a thermostat, which releases the system from its start position and commences the
predetermined programme
3.9
programme
sequence of control operations determined by the programming unit involving switching on, starting up,
supervising and switching off the burner (for fuel oil see diagrams in Annex DD)
NOTE Safety actions such as safety shut down and lock out are also part of the programme.
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3.10
purge
forced introduction of air through the combustion chamber and flue passages in order to displace any remaining
fuel/air mixture and/or products of combustion
3.10.1
pre-purge
purge which takes place between the start signal and the energization of the ignition device
3.10.2
post-purge
purge which takes place immediately following shut-down
3.11
first safety time
interval between the pilot fuel valve, the start fuel valve or main fuel valve, as applicable, being energized and
the pilot fuel valve, start fuel valve or main fuel valve, as applicable, being de-energized if no flame is present
NOTE Where there is no second safety time, this is called the safety time.
3.12
second safety time
where there is a first safety time applicable to either a pilot or start fuel flame only, the second safety time is the
interval between the main fuel valve being energized and the main fuel valve being de-energized if no main
flame is present
3.13
burner without fan
burner where the primary air required for combustion is provided by the action of the fuel and the secondary air
is freely available from the surroundings
3.14
burner with fan
burner in which some or all of the air required for the combustion is supplied by means of a fan (i.e. forced
draught or induced draught)
3.15
running position of the system
position of the system in which the burner is in normal operation under the supervision of the programming unit
and its flame detector device
3.16
controlled shut-down
process by which the power to the fuel shut-off valve(s) is removed before any other action takes place, e.g. as a
result of the action of a controlling function
3.17
safety shut-down
process which is effected immediately following the response of a protection device or the detection of a fault in
the automatic burner control system and puts the burner out of operation
NOTE The resulting state of the system is defined by deactivated terminals for the fuel shut-off valves and the
ignition device.
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3.18
lock-out
3.18.1
non-volatile lock-out
safety shut-down condition of the system, such that a restart can only be accomplished by a manual reset of the
system and by no other means
3.18.2
volatile lock-out
safety shut-down condition of the system, such that a restart can only be accomplished by either the manual
reset of the system, or an interruption of the main power and its subsequent restoration
3.19
ignition-restoration
spark restoration
process by which, following loss of flame signal, the ignition device will be switched on again without total
interruption of the fuel supply
3.20
recycling
process by which, after a safety shut-down a full start-up sequence is automatically repeated
3.21
functions of automatic burner control systems
3.21.1
waiting time
for burners without fans, interval between the start signal being given and the energization of the ignition
device or gas valves, which ever comes first
NOTE During this time natural ventilation of the combustion chamber and the flue passages can take place.
3.21.2
waiting time
interval between the start signal being given (and air registers in purge position, if applicable) and the
energization of the ignition device
NOTE During this time natural ventilation of the combustion chamber and the flue passages takes place.
3.21.3
pre-purge time
period during which purge takes place at the proven air rate prior to the energization of the ignition device
or gas valves, which ever comes first
3.21.4
purge time
period during which the combustion chamber is compulsorily ventilated without any fuel being supplied
3.21.5
pre-purge time
period preceding the signal to open the fuel valve during which the combustion chamber is compulsorily
ventilated
3.21.6
post-purge time
period during which purge takes place at the proven air rate between any shut-down and the moment the
fan is switched off
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3.21.7
post-purge time
period following the signal to close the fuel valve during which the combustion chamber is compulsorily
ventilated
3.21.8
inter-purge time
period during which purging of the combustion chamber takes place at the proven air rate after unsuccessful
ignition and prior to the next recycle attempt
3.21.9
inter-waiting time
period during which natural ventilation of the combustion chamber takes place after unsuccessful ignition and
prior to the next recycle attempt
3.22
sequences
3.22.1
start-up sequence
sequence of actions executed by the system which brings the burner from the start position to the running
position
3.22.2
first stage
part of the start-up sequence which allows the release of start fuel into the combustion chamber
3.22.3
second stage
part of the start-up sequence which allows the release of further fuel into the combustion chamber (if applicable)
3.23
system for permanent operation
system that is designed to remain in the running position for longer than 24 h without interruption
3.24
system for non-permanent operation
system that is designed to remain in the running position for less than 24 h
3.25
self-checking function of the flame detector device
automatic internal function of the system which checks the operation of the flame detector device
3.26
air flow simulation
condition which occurs when the air flow sensor indicates the presence of air flow when in reality no air flow is
present
3.27
spark supervision
process of monitoring the ignition spark
3.28
pilot or start fuel flame proving period
interval between the end of the first safety time and the beginning of the second safety time which is used to
prove that the pilot or fuel flame is stable
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3.29
intermittent first stage
first stage that is ignited prior to ignition of the main flame and is shut off simultaneously with it
3.30
interrupted first stage
first stage that is ignited each time the burner is started up and which is extinguished at the end of the second
safety time
3.31
burner ignition systems
3.31.1
automatic electrical ignition
system in which the fuel is ignited using only electrical energy
3.31.1.1
ignition by controlled spark
system which allows the fuel to be released only when the presence of the ignition spark has been proven
3.31.1.2
ignition by non controlled spark
system in which the ignition spark is not proven
3.31.2
automatic ignition with liquid or gaseous fuel
system by which the fuel is ignited by a pilot burner using liquid or gaseous fuel; the operation of the pilot
burner may be either interrupted or intermittent
NOTE 1 Interrupted pilot burners may be operated manually.
NOTE 2 Intermittent pilot or first stage burners are operated automatically.
3.31.2.1
ignition by controlled pilot burner
system which release the main fuel when the ignition burner flame is present
3.31.2.2
ignition by non-controlled pilot burner
system in which the release of the main fuel is not prevented by the absence of the flame of the pilot burner
3.32
ignition
3.32.1
total ignition time
period during which the ignition device is in operation. Pre-ignition, actual ignition and post-ignition times make
up the total ignition time
3.32.2
pre-ignition time
period between the start of the ignition cycle and the signal to open the valve
3.32.3
ignition time
period bet
...
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