SIST EN 676:2004
(Main)Automatic forced draught burners for gaseous fuels
Automatic forced draught burners for gaseous fuels
This European Standard specifies the terminology, the general requirements for the construction and operation of automatic forced draught gas burners and also the provision of control and safety devices, and the type test procedure for these burners.
This standard is applicable to
¾ automatic gas burners with a combustion air fan (hereinafter called "burners") that are equipped as described in clause 4, intended for use in heat generators of different types, and that are operated with fuel gases;
¾ total pre-mixed burners and nozzle mixed burners.
The standard is applicable to
¾ single burners with a single combustion chamber, although such burners are fitted to a single appliance, in which case the requirements of the relevant appliance standard shall additionally apply;
¾ single-fuel and dual-fuel burners when operating only on gas;
¾ the gas function of dual-fuel burners designed to operate simultaneously on gaseous and liquid fuels in which case the requirements of EN 267 will also apply in respect of the liquid fuel function.
Automatische Brenner mit Gebläse für gasförmige Brennstoffe
Diese Norm legt die Begriffe, die allgemeinen Anforderungen für den Bau und die Funktion von automatischen Gasbrennern mit Gebläse sowie die Ausrüstung mit Regel- und Sicherheitseinrichtungen und das Verfahren für die Typprüfung dieser Brenner fest.
Diese Norm gilt für
¾ automatische Gasbrenner mit Verbrennungsluft-Gebläse (im Folgenden Brenner genannt), die nach Abschnitt 4 ausgerüstet sind und deren Verwendung in Wärmeerzeugern verschiedener Art behandelt wird und die mit technischen Brenngasen betrieben werden;
¾ Vormischbrenner und Düsenbrenner.
Diese Norm gilt für
¾ Einzelbrenner mit nur einem einzigen Feuerraum, aber auch solche, die mit Geräten zusammengebaut werden; in diesem Fall gelten die zusätzlichen Geräteanforderungen;
¾ Brenner und Zweistoffbrenner für den ausschließlichen Betrieb mit Gas;
¾ auch den Betrieb mit Gas von Zweistoffbrennern, die gleichzeitig mit gasförmigen oder flüssigen Brenn-stoffen betrieben werden. In diesem Fall gelten auch die Anforderungen von EN 267 für den Betrieb mit flüssigen Brennstoffen.
Bruleurs automatiques a air soufflé pour combustibles gazeux
La présente Norme européenne prescrit la terminologie, les exigences générales concernant la construction et le fonctionnement des brûleurs automatiques à gaz à air soufflé, leur équipement avec des dispositifs de régulation et de sécurité et les méthodes d'essais de type pour ces brûleurs.
La présente Norme européenne est applicable :
aux brûleurs automatiques à gaz avec ventilateur d'air de combustion (dénommés ci après " brûleurs ") équipés comme indiqué à l'article 4, destinés à être utilisés sur des générateurs de chaleur de différents types et qui fonctionnent avec des combustibles gazeux ;
aux brûleurs à pré-mélange total et aux brûleurs à mélange au nez.
La présente Norme européenne est aussi applicable :
aux brûleurs individuels, alimentant une seule chambre de combustion, installés sur un seul appareil, auquel cas les exigences de la norme concernant l'appareil s'appliquent de façon additionnelle ;
aux brûleurs mono et bi combustible pour leur fonctionnement exclusif au gaz ;
au fonctionnement au gaz des brûleurs bi-combustibles conçus pour fonctionner simultanément aux combustibles liquides et gazeux; dans ce cas, les exigences de l'EN 267 s'appliquent pour le fonctionnement aux combustibles liquides.
Samodejni plinski ventilatorski gorilniki
General Information
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Standards Content (Sample)
SLOVENSKI STANDARD
01-januar-2004
1DGRPHãþD
SIST EN 676:1997
Samodejni plinski ventilatorski gorilniki
Automatic forced draught burners for gaseous fuels
Automatische Brenner mit Gebläse für gasförmige Brennstoffe
Bruleurs automatiques a air soufflé pour combustibles gazeux
Ta slovenski standard je istoveten z: EN 676:2003
ICS:
27.060.20
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD
EN 676
NORME EUROPÉENNE
EUROPÄISCHE NORM
August 2003
ICS 27.060.20 Supersedes EN 676:1996
English version
Automatic forced draught burners for gaseous fuels
Brûleurs automatiques à air soufflé pour combustibles Automatische Brenner mit Gebläse für gasförmige
gazeux Brennstoffe
This European Standard was approved by CEN on 3 April 2003.
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 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 Management Centre has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,
Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United
Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36 B-1050 Brussels
© 2003 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 676:2003 E
worldwide for CEN national Members.
Contents
1 Scope .6
2 Normative references .6
3 General definitions .7
3.1 Specific definitions .8
4 Constructional and operational requirement.14
4.1 Conversion to different gases .14
4.2 Construction.14
4.3 Equipment.15
4.4 Functional and operational requirements .21
5 Test methods.29
5.1 General.29
5.2 Functional tests.33
5.3 Operation .34
5.4 Tests to be carried out on the working and test diagrams.35
5.5 Combustion .38
5.6 Start-up .39
5.7 Obtaining the heat input.39
5.8 Electrical safety.40
6 Marking, labelling and packaging .40
6.1 General.40
6.2 Data plate.40
6.3 Other marking.41
6.4 Instructions for installation, adjustment, maintenance and operation .41
6.5 Marking on the packaging.42
6.6 Official languages to be used.42
Annex A (informative) Determination of the combustion characteristics - carbon monoxide and
nitrogen oxides .55
Annex B (informative) Examples of control box sequencing .57
Annex C (informative) Test gases.58
C.1 General.58
C.2 Conditions for preparation of the test gases.58
C.3 Practical application of the test gases .59
Annex D (informative) Gas connections conditions in common use in the various countries.62
Annex E (informative) Tests .63
E.1 Supplementary testing .63
E.2 Drawing review.63
E.3 Individual test and inspection .63
E.4 Test report .64
Annex F (informative) Use of alternative gas lines and test documentation .65
F.1 Use of alternative gas lines.65
F.2 Test documentation.65
Annex G (informative) Correction of the influence of combustion air temperature and humidity on NO -
x
emissions.66
Annex H (informative) Check of the air proving device.67
Annex I (informative) Specific additional requirements and limitations for use of EN 676 burners for
industrial applications.68
I.1 Pre-heating of the combustion air.68
I.2 Continuous working of the air ventilator.68
I.3 Electronic air/fuel ratio and O -controllers.68
I.4 Variable excess of combustion air.68
I.5 Burner with start gas flame .69
I.6 Air filtering.69
Annex ZA (informative) A-deviations .70
Annex ZB (informative) Clauses of this European Standard addressing essential requirements or other
provisions of EU Directives .71
Foreword
This document EN 676:2003 has been prepared by Technical Committee CEN/TC 131 “Gas burners using fans”,
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 February 2004, and conflicting national standards shall be withdrawn at the latest
by February 2004.
This document has been prepared under a mandate given to CEN by the European Commission and the European
Free Trade Association, and supports essential requirements of EU Directive(s).
For relationship with EU Directive(s), see informative Annex ZB, which is an integral part of this document.
NOTE This European Standard had also been proposed for inclusion in the mandate under the EU Directive 98/37/EC
(Machinery Directive). As the mandate has been given after the Standard had been accepted by the Technical Committee for
submission to Formal Vote and in order not to further delay its publication, it will be reviewed within the context of the Directive
98/37/EC directly after the publication.
According to edition 1996 the following fundamental changes are given:
revisions for special applications;
implementation of NO -classes and forming of arithmetic average values for determining the NO -values;
x x
implementation of appliance categories for forced draught burners.
Annexes A, B, C, D, E, F, G, H, J and ZA are informative.
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, Czech Republic, Denmark, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal,
Slovakia, Spain, Sweden, Switzerland and the United Kingdom.
Introduction
This European 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
pressures 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 with 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: I for natural gas and I for liquefied petroleum gas;
2R 3R
dual category: II for natural and liquefied petroleum gas.
2R /3R
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 gas 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 gas 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 temperature, 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 the 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
...
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