1、November 2008DEUTSCHE NORM English price group 31No part of this standard may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 27.060.20!$Rw“1478496
2、www.din.deDDIN EN 676Amendment A2:2008)English version of DIN EN 676:2008-11A2:2008)Englische Fassung DIN EN 676:2008-11SupersedesDIN EN 676:2003-11www.beuth.deDocument comprises 104 pages Automatic forced draught burners for gaseous fuels (includesAutomatische Brenner mit Geblse fr gasfrmige Brenns
3、toffe (enthlt nderungDIN EN 676:2008-11 2 Start of validity This standard takes effect on 1 November 2008. DIN EN 676:2003-11 may be used in parallel until June 2010. National foreword This standard includes safety requirements. This standard has been prepared by Technical Committee CEN/TC 131 “Gas
4、burners using fans” (Secretariat: DIN, Germany). The responsible German body involved in its preparation was the Normenausschuss Heiz- und Raumluft-technik (Heating and Ventilation Technology Standards Committee), Technical Committee NA 041-01-63 AA Gasbrenner mit Geblse (SpA CEN/TC 131). The start
5、and finish of text introduced or altered by amendment is indicated in the text by tags A1 (Amendment A1 relating to the Machinery Directive 98/37/EC) and A2 (Amendment A2 relating to the Pressure Equipment Directive 97/23/EC). In the consolidated version, the following wording concerning the amendme
6、nts is incorrect: “According to edition 1996 the following fundamental changes are given: revisions for special applications; implementation of NOx-classes and forming of arithmetic average values for determining the NOx-values; implementation of appliance categories for forced draught burners.” The
7、 correct reading is: “Compared with edition EN 676:2003 the following fundamental changes have been made: Inclusion of hazards of burners considered as “machinery” in accordance with Directive 98/37/EC and Directive 2006/42/EC (Machinery Directives). Additional requirements for burners with pressuri
8、sed parts and burners firing pressurised bodies as defined in the Pressure Equipment Directive (PED) 97/23/EC.” Amendments This standard differs from DIN EN 676:2003-11 as follows: a) Inclusion of hazards of burners considered as “machinery” in accordance with Directive 98/37/EC and Directive 2006/4
9、2/EC (Machinery Directives). b) Additional requirements for burners with pressurised parts and burners firing pressurised bodies as defined in the Pressure Equipment Directive (PED) 97/23/EC. DIN EN 676:2008-11 3 Previous editions DIN 4788: 1966-02 DIN 4788-2: 1977-06, 1990-02 DIN EN 676: 1996-12, 2
10、003-11 DIN EN 676:2008-11 4 This page is intentionally blank EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 676:2003+A2 June 2008 ICS 27.060.20 Supersedes EN 676:2003 English Version Automatic forced draught burners for gaseous fuels Brleurs automatiques air souffl pour combustibles gazeux Aut
11、omatische Brenner mit Geblse fr gasfrmige Brennstoffe This European Standard was approved by CEN on 3 April 2003 and includes Amendment 1 approved by CEN on 1 April 2008 and Amendment 2 approved by CEN on 1 April 2008. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which s
12、tipulate 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 Management Centre or to any CEN member. This European Stand
13、ard 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 Management Centre has the same status as the official versions. CEN members are the national sta
14、ndards bodies of Austria, Belgium, Bulgaria, 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 K
15、ingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2008 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 676:2003+A2:20
16、08: EEN 676:2003+A2:2008 (E) Contents Foreword4 1 Scope 6 2 Normative references 6 3 Terms and definitions .9 3.1 General terms and definitions9 3.2 Specific terms and definitions10 4 !Constructional and operational requirements safety requirements and/or protective measures“.16 4.1 Conversion to di
17、fferent gases 16 4.2 Construction.16 4.3 Equipment 18 4.4 Functional and operational requirements.24 4.5 !Machine safety requirements and/or protective measures .31 5 Test methods32 5.1 General32 5.2 Functional tests .36 5.3 Operation 37 5.4 Tests to be carried out on the working and test diagrams .
18、38 5.5 Combustion42 5.6 Start-up .43 5.7 Obtaining the heat input .43 5.8 Electrical safety44 5.9 !Verification of safety and /or protective measures.44 6 Marking, labelling and packaging 44 6.1 General44 6.2 Data plate45 6.3 Other marking 45 6.4 Instructions for installation, adjustment, maintenanc
19、e and operation46 6.5 Marking on the packaging 47 Annex A (informative) Determination of the combustion characteristics - carbon monoxide and nitrogen oxides 60 Annex B (informative) Examples of control box sequencing 62 Annex C (informative) Test gases63 C.1 General63 C.2 Conditions for preparation
20、 of the test gases63 C.3 Practical application of the test gases 64 Annex D (informative) Gas connections conditions in common use in the various countries .67 Annex E (informative) Tests .68 E.1 Supplementary testing 68 E.2 Drawing review.68 E.3 Individual test and inspection 68 E.4 Test report 69
21、Annex F (informative) Use of alternative gas lines and test documentation 70 F.1 Use of alternative gas lines 70 F.2 Test documentation.70 Annex G (informative) Correction of the influence of combustion air temperature and humidity on NOx- emissions .71 Annex H (informative) Check of the air proving
22、 device.72 2DIN EN 676:2008-11 PageEN 676:2003+A2:2008 (E) Annex I (informative) !Additional recommendations for specific applications“.73 I.1 !General 73 I.2 Pre-heating of the combustion air .73 I.3 Continuous working of the air ventilator 73 I.4 Variable excess of combustion air 73 I.5 Burner wit
23、h start gas flame 73 I.6 Air filtering74 Annex J (normative) !Machine related hazards safety requirements and/or protective measures .75 J.1 General75 J.2 List of significant hazards 75 J.3 Safety requirements and /or protective measures.75 J.4 Verification of machine safety requirements and/or prot
24、ective measures .78 J.5 Information for use 78 Annex K (normative) #Additional requirements for burners with pressurised parts and burners firing pressurised bodies as defined in Pressure Equipment Directive (PED) 97/23/EC .79 K.1 General79 K.2 Design.79 K.3 Materials .79 K.4 Pressurised parts 79 K.
25、5 Gas line components 80 K.6 Gas pressure governor .81 K.7 High gas pressure over load protection device .81 K.8 Automatic safety shut-off valve .81 K.9 Air proving device .81 K.10 Automatic burner control system 81 K.11 Means for draining and venting .81 K.12 General functions requirements 82 K.13
26、External safety limiter .83 K.14 Design according to EN 50156-183 K.15 Consideration: safety life cycle84 K.16 Tests of pressurised parts85 K.17 Other marking 86 K.18 Instructions for installation, adjustment, maintenance and operation86 Annex ZA (informative) A-deviations 87 Annex ZB (informative)
27、Clauses of this European Standard addressing essential requirements or other provisions of EU Directives88 Annex ZC (informative) #Relationship between this European Standard and the essential safety requirements of the Pressure Equipment (PED) Directive 97/23/EC$ 91 Annex ZD (informative) !Relation
28、ship between this European Standard and the Essential Requirements of EU Directive 98/37/EC Machinery Directive“ .98 Annex ZE (informative) !Relationship between this European Standard and the Essential Requirements of EU Directive 2006/42/EC Machinery Directive“ .99 Bibliography100 3DIN EN 676:2008
29、-11 EN 676:2003+A2:2008 (E) Foreword This document (EN 676:2003+A2:2008) has been prepared by Technical Committee CEN/TC 131 “Gas burners using fans”, the secretariat of which is held by DIN. This document shall be given the status of a national standard, either by publication of an identical text o
30、r by endorsement, at the latest by December 2008 and conflicting national standards shall be withdrawn at the latest by June 2010. This document includes Amendment 1, approved by CEN on 2008-04-01 and Amendment 2, approved by CEN on 2008-04-01. This document supersedes #EN 676:2003$. The start and f
31、inish of text introduced or altered by amendment is indicated in the text by tags ! “ and # $. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive(s). For relationship wit
32、h EU Directive(s), see informative #Annexes ZB, ZC, ZD and ZE$, which are integral parts of this document. !deleted text“ According to edition 1996 the following fundamental changes are given: revisions for special applications; implementation of NOx-classes and forming of arithmetic average values
33、for determining the NOx-values; implementation of appliance categories for forced draught burners. #Following a request from CEN/TC 131, CEN has agreed to defer the date of withdrawal of EN 676:2003 for a transition period of 2 years.$ #Annexes A, B, C, D, E, F, G, H, I, ZA, ZB, ZC, ZD and ZE are in
34、formative.$ !Annexes J and K are normative.“ This document includes a Bibliography. 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, Cyprus, Czech Republic, De
35、nmark, 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. 4DIN EN 676:2008-11 EN 676:2003+A2:2008 (E) Introduction This E
36、uropean Standard is primarily intended for automatic forced draught gas burners having a combustion air fan, operated with gaseous fuels, and intended to be marketed as a complete assembly. EN 437 sets out a system of classification of appliances into categories defined according to the gases and pr
37、essures for which they are designed. Such a system of classification, when applied to forced draught burners, can lead to difficulties in defining the precise category to which a particular burner should be allocated. For example many burners are designed to operate on a wide range of fuel gases wit
38、h little or no modification other than adjustment of air supply. The technical committee responsible for the standard decided that the following appliance categories for forced draught burners should apply: single categories: I2Rfor natural gas and I3Rfor liquefied petroleum gas; dual category: II2R
39、 /3Rfor natural and liquefied petroleum gas. All the burners of this standard marked with these categories are commissioned on site and the measured values are recorded in a commissioning report. However it should be noted that the Gas Appliance Directive requires the specification of the type of ga
40、s and the supply pressure used as well as the burner category. Forced draught gas burners according to this standard are often used in industrial applications. The safety principles are the same as for forced draught gas burners used for household/commercial applications. Industrial forced draught g
41、as burners however should operate safely in their industrial environment and the risks involved can differ from those for household applications. These industrial forced draught gas burners can be characterized by the ability to withstand industrial environmental influences, like moisture, high temp
42、erature, electrical and magnetic phenomena, vibrations, etc. Principal requirements for installation and construction of gas burners and industrial thermal processing are covered by EN 746-family. Special requirements for forced draught burners for industrial premises will be given as a note with th
43、e addition “Industrial application“. Further information and application limitation for EN 676 forced draught burners which are used for industrial application are given in informative annex I. !This document is a type C standard as stated in EN ISO 12100-1 and EN ISO 12100-2. The machinery concerne
44、d and the extent to which hazards, hazardous situations and hazardous events are covered are indicated in the scope of this document. When provisions of this type C standard are different from those which are stated in type A or B standards, the provisions of this type C standard take precedence ove
45、r the provisions of the other standard, for machines that have been designed and built according to the provisions of this type C standard.“ 5DIN EN 676:2008-11 EN 676:2003+A2:2008 (E) 1 Scope !This European Standard specifies the terminology, the general requirements for the construction and operat
46、ion of automatic forced draught gas burners and also the provision of control and safety devices, and the test procedure for these burners.“ This standard is applicable to !automatic gas burners with a combustion air fan (hereinafter called “burners“) as described in 3.1.2 and gas line components, i
47、ntended for use in appliances of different types, and that are operated with gaseous fuels;“ total pre-mixed burners and nozzle mixed burners. The standard is applicable to !single burners with a single combustion chamber;“ single-fuel and dual-fuel burners when operating only on gas; !gas function
48、of dual-fuel burners designed to operate simultaneously on gaseous and liquid fuels.“ !This European Standard deals with all significant machine hazards, hazardous situations and events relevant to burners, when they are used as intended and under conditions of misuse which are reasonably foreseeabl
49、e by the manufacturer, see Annex J. This European Standard specifies the requirements to be met by the manufacturer to ensure the safety during commissioning, start-up, operation, shut-down and maintenance. This European Standard does not deal with hazards due to specific applications. This European Standard is not applicable to automatic forced draught gas burners which are manufactured before the date of its publication as EN.“ #This European Standard does not apply to burners specifically designed for use in industrial processe
