1、BRITISH STANDARDBS EN 15270:2007Pellet burners for small heating boilers Definitions, requirements, testing, markingThe European Standard EN 15270:2007 has the status of a British StandardICS 97.100.30g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g4
2、0g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 15270:2007This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 January 2008 BSI 2008ISBN 978 0 580 56069 9National forewordThis British S
3、tandard is the UK implementation of EN 15270:2007.The UK participation in its preparation was entrusted to Technical Committee RHE/10, Heating boilers.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all th
4、e necessary provisions of a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.Amendments/corrigenda issued since publicationDate CommentsEUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 15270December 2007ICS
5、97.100.30English VersionPellet burners for small heating boilers - Definitions,requirements, testing, markingBrleurs granuls pour petites chaudires de chauffage -Dfinitions, exigences, essais, marquagePelletbrenner fr kleine Heizkessel - Definitionen,Anforderungen, Prfung, KennzeichnungThis European
6、 Standard was approved by CEN on 3 November 2007.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concern
7、ing such nationalstandards may be obtained on application to the CEN 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 translationunder the responsibility of a CEN member into its own lan
8、guage and notified to the CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Lux
9、embourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2007 CEN All right
10、s of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 15270:2007: EEN 15270:2007 (E) 2 Contents Page Foreword3 1 Scope 4 2 Normative references 4 3 Terms, definitions and symbols.4 4 Classification and groupings for pellet burners.8 5 Requirements.9 6
11、Testing 16 7 Conformity evaluation.25 8 Marking .25 9 Operating instructions 25 10 Test report 27 Annex A (informative) Vocabulary.29 Annex B (informative) Fireproof non-metallic materials for pellet burners.32 Annex C (normative) Requirements for electronic burner start up functions and pellet-air
12、ratio controls34 Annex D (informative) Example of risk assessment to prevent back burning36 Annex E (informative) Example of risk assessment and the allocation of safety level for control functions using electronic devices for pellet burners38 Annex F (informative) Long term stability test (optional
13、)40 Annex G (informative) Measurement methods for some physical parameters.41 Annex H (normative) Determination of organic gaseous compounds content 44 Annex I (informative) Conformity evaluation46 Bibliography 49 EN 15270:2007 (E) 3 Foreword This document (EN 15270:2007) has been prepared by Techni
14、cal Committee CEN/TC 57 “Central heating boilers”, the secretariat of which is held by DIN. 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 June 2008, and conflicting national standards shall be w
15、ithdrawn at the latest by June 2008. 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. According to the CEN/CENELEC Internal Regulations
16、, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands
17、, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. EN 15270:2007 (E) 4 1 Scope This European Standard relates to pellet burners having a maximum heat input of not more than 70 kW, intended for fitting with appropriate boilers for hot water, an
18、d intended for high quality pellets in accordance with CEN/TS 14961:2005 Annex A. This standard contains requirements and test methods for safety, combustion quality, operating characteristics and maintenance of pellet burners and covers and also all external equipment that influences the safety sys
19、tems. This standard also contains information on how to enable a correct match between pellet burner and boiler. Pellet burners that are sold as a complete unit together with their own dedicated boilers are not covered. NOTE Other fuels will be considered in future amendments to this standard. 2 Nor
20、mative 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 230:2005, Automatic burner c
21、ontrol systems for oil burners EN 298:2003, Automatic gas burner control systems for gas burners and gas burning appliances with or without fans EN 12067-2:2004, Gas/air ratio controls for gas burners and gas burning appliances Part 2: Electronic types CEN/TS 14961:2005, Solid biofuels Fuel specific
22、ations and classes EN 15036-1, Heating boilers Test regulations for airborne noise emissions from heat generators Part 1: Airborne noise emissions from heat generators CEN/TS 15404, Solid recovered fuels Methods for the determination of ash melting behaviour by using characteristic temperatures prEN
23、 15456, Heating boilers Electrical power consumption for heat generators System boundaries - Measurements EN 60335-2-102, Household and similar electrical appliances Safety Part 2-102: Particular requirements for gas, oil and solid-fuel burning appliances having electrical connections (IEC 60335-2-1
24、02:2004, modified) EN 60529, Degrees of protection provided by enclosures (IP code) (IEC 60529:1989) EN 60730-1:2002, Automatic electrical controls for household and similar use Part 1: General requirements (IEC 60730-1:1999,modified) EN 60730-2-5:2002, Automatic electrical controls for household an
25、d similar use Part 2-5: Particular requirements for automatic electrical burner control systems (IEC 60730-2-5:2000, modified) 3 Terms, definitions and symbols For the purpose of this standard, the following terms and definitions apply. NOTE For reference use only the equivalent terms in Danish, Eng
26、lish, French, German and Swedish, are found in informative Annex A. EN 15270:2007 (E) 5 3.1 pellet burner device for burning pellets where the control can be of different types; on-off, mechanical, modulating or multi stage. The pellets can be fed horizontally, from above or from below 3.2 modulatin
27、g burner burner where the throughput may be infinitely varied between the lower and upper limits 3.3 multistage burner burner where several firing stages can be utilised. Burners with only two firing rates are included in this category 3.4 ignition device device used to ignite the pellets in the bur
28、ner head of a pellet burner, it can be either manual, automatic or with a basic fire bed. The ignition can be caused by a hot air element, automatic ignition with liquid or gaseous fuels, electric coil or electric glow plug 3.5 basic fire bed quantity of glowing embers which ensures ignition of the
29、test fuel to be charged 3.6 conveyor system, auger, feed screw mechanical arrangement, normally incorporating a feed screw, used for transporting the pellets from the fuel hopper to the burner head 3.7 fuel hopper fuel store from which fuel is fed to the pellet burner 3.8 storage with external fuel
30、hopper external fuel store from which fuel is fed to the pellet burner and which is separate from the pellet burner. It can be located either inside or outside the room where the pellet burner is located 3.9 storage with integral fuel hopper integral fuel store container from which fuel is fed to th
31、e pellet burner and which is integral with the pellet burner 3.10 burner head part of a pellet burner where the pellets are burned 3.11 back burning situation in which the flames from the burning pellets in the burner head propagate and ignite the pellets in the conveyor system 3.12 temperature limi
32、ter safety level B device that causes the safe shutdown and lockout of the fuel supply and/or the combustion air supply respectively if the limiter value exceeds a pre-set limit. According to EN 14597 it is a device of Type “TB” EN 15270:2007 (E) 6 3.13 safety temperature limiter safety level C devi
33、ce that causes the safe shutdown and lockout of the fuel supply and/or the combustion air supply respectively if the limiter value exceeds a pre-set limit. According to EN 14597 it is a device of Type “STB” 3.14 sprinkle system safety device that allows small droplets of water to be released onto th
34、e pellets in the conveyor system if back burning occurs 3.15 drop chute sloping channel, through which the pellets fall from a conveyor system into a burner head or into moving equipment 3.16 cell feeder device that intermittently interrupts the fuel stream thus only allowing a small amount of pelle
35、ts at a time to be supplied to the burner, thereby preventing the flue gases from reaching the hopper 3.17 fire damper mobile closure within a duct which is designed to prevent the passage of fire 3.18 combustion air supply air required by the pellet burner to ensure the safe and efficient combustio
36、n of pellets and supplied into the combustion chamber, which is entirely or partially used to burn the pellets in the burner head 3.19 ash discharge arrangement for removing the ash from the burner head or the combustion chamber which may be automatically controlled 3.20 non volatile lockout shutdow
37、n condition such that a restart can be accomplished only by a manual reset and by no other means 3.21 volatile lockout shutdown condition such that a restart can be accomplished by restoration of the electrical supply after its loss or by manual reset 3.22 heat input, in kW, amount of heat as a func
38、tion of time released by the burner at a given throughput 3.23 maximum heat input, in kW, maximum heat input, at continuous burning, as specified by the manufacturer 3.24 minimum heat input, in kW, minimum heat input, at continuous burning, as specified by the manufacturer 3.25 excess air ratio rati
39、o between the effectively introduced quantity of air and the theoretically required quantity of air EN 15270:2007 (E) 7 3.26 safety device device providing one or more safety related functions or parts of a safety related function, built in one physical unit 3.27 safety system system including the e
40、ntire set of safety related controls and safety related measures or a part of it to provide the safety of the pellet burner or the part of it 3.28 Symbols, descriptions and units Symbols used in this standard are listed in Table 1. All gaseous volumes are expressed in m, and referred to 0 C and 1,01
41、3 bar. Table 1 Symbols, descriptions and units Symbol Description Unit a Ash content in the test fuel at dry bases mass fraction in % Bd Mass of test fuel referred to the test duration kg/h at dry bases Bw Mass of test fuel referred to the test duration kg/h at firing CC Carbon content of the test f
42、uel mass fraction in % CCOCarbon monoxide content of the dry flue gases volume fraction in % CCO2Carbon dioxide content of the dry flue gases volume fraction in % COGCCalculated content of organic gaseous compounds mg/m dry flue gas at 10 % O2CrCarbon content of residues referred to quantity of test
43、 fuel mass fraction in % CTHC,m Measured total hydrocarbon content expressed in mg/m methane equivalents in wet flue gas mg/m methane CTHC,p Measured total hydrocarbon content expressed in mg/m propane equivalents in wet flue gas mg/m propane Gd Actual specific dry flue gas volume m/kg fuel Gw Actua
44、l specific wet flue gas volume m/kg fuel EN 15270:2007 (E) 8 Table 1 (continued) Symbol Description Unit CH Hydrogen content mass fraction in % s mr Total residue in boiler after test kg O2, m Measured oxygen content in dry flue gas % as mean value OGC Organic gaseous compound Qib Heat input kW R To
45、tal residue referred to the mass of test fuel mass fraction in % t Test duration h THC Total hydrocarbon content mg/m Tamb Ambient temperature C Treturn Return temperature C Tflow Flow temperature C CWMoisture content mass fraction in % Excess air ratio 4 Classification and groupings for pellet burn
46、ers 4.1 Classification For the purpose of this standard pellet burners are classified in accordance with the following: Methods of control and grouped as detailed in 4.2; Means of ignition and grouped as detailed in 4.3; External or integral fuel hopper; Combustion chamber; Monobloc or other type of
47、 burner. 4.2 Methods of control of pellet burner Methods of control are grouped as follows: a. On-off control; b. Modulating control; c. Multi-stage control. 4.3 Means of ignition Means of ignition are grouped as follows: a. Manual ignition; b. Automatic electric ignition; EN 15270:2007 (E) 9 c. Pil
48、ot fire; d. Hot air element; e. Automatic ignition with liquid or gaseous fuels. 5 Requirements 5.1 Design 5.1.1 General design 5.1.1.1 Materials The quality of materials, form and dimensioning of the components shall ensure that the pellet burner is capable of operating safely and during a reasonab
49、le economic life time, if installed, operated, maintained and adjusted correctly under the conditions specified by the manufacturer and exposed to the related mechanical, chemical and thermal stresses. The materials of construction shall withstand all normally occurring chemical, mechanical and thermal stresses. The construction of the burners shall be such that no instability, distortion or breakage likely to impair its safety can occur. Levers and similar devices which have to be operated by the installer or user shall be appropri
