Forced draught burners for gaseous fuels

This European Standard specifies the terminology, the general requirements for the construction and operation of forced draught gas burners and also the provision of control and safety devices, and the test procedure for these burners.
This Europen Standard is applicable to
— automatic gas burners with a combustion air fan (hereinafter called "burners") and gas line components, intended for use in appliances of different types, and that are operated with gaseous fuels;
— pre-mixed burners and nozzle mixed burners;
— single burners with a single combustion chamber;
— single-fuel and dual-fuel burners when operating only on gas;
— the gas function of dual-fuel burners designed to operate simultaneously on gaseous and liquid fuels, which, for the latter, the requirements of EN 267 also apply.
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 foreseeable, see Annex J.
This European Standard specifies the requirements to ensure the safety during commissioning, start-up, operation, shut-down and maintenance.
This European Standard does not apply to burners specifically designed for use in industrial processes carried out on industrial premises.
This European Standard deals also with the additional requirements for the burners in the scope with pressurised parts and /or firing pressurised bodies, see Annex K.
This European Standard deals also with forced draught burners intended to be used with biogenous gaseous fuels, mixtures with line-conveyed gas and special gaseous fuels.
This European Standard deals also with burners equipped to increase the total appliance efficiency; see Annex M.

Gebläsebrenner für gasförmige Brennstoffe

Die vorliegende Europäische Norm legt die Terminologie für und die allgemeinen Anforderungen an die Konstruktion und den Betrieb von Gasgebläsebrennern und die Bereitstellung von Steuerungs- und Sicherheitseinrichtungen fest sowie das Prüfverfahren für diese Brenner.
Diese Europäische Norm ist anwendbar auf:
   automatische Gasbrenner mit einem Verbrennungsluftgebläse (im Folgenden als „Brenner“ bezeichnet) und gasseitige Ausrüstungsteile, die für die Verwendung in unterschiedlichen Gerätetypen vorgesehen sind und mit gasförmigen Brennstoffen betrieben werden;
   Vormischbrenner und Düsenbrenner;
   Einzelbrenner mit einem einzigen Feuerraum;
   Brenner und Zweistoffbrenner für den ausschließlichen Betrieb mit Gas;
   den Gasbetrieb von Zweistoffbrennern, die für den gleichzeitigen Betrieb mit gasförmigen und flüssigen Brennstoffen konstruiert sind, wobei in letzterem Fall auch die Anforderungen der EN 267 gelten.
Diese Europäische Norm behandelt sämtliche signifikanten maschinenbezogenen Gefährdungen, Gefährdungssituationen und Gefährdungsereignisse im Hinblick auf Brenner, wenn diese zweckent-sprechend sowie unter zweckentfremdeten Bedingungen verwendet werden, die vernünftigerweise vorher¬sehbar sind, siehe Anhang J.
Diese Europäische Norm legt die Anforderungen fest, die für die Sicherheit während Inbetriebnahme, Anlauf, Betrieb und Abschaltung sowie Wartung erforderlich sind.
Diese Europäische Norm gilt nicht für Brenner, die speziell für den Einsatz in industriellen Prozessen ausgelegt sind, die in industriellen Anlagen erfolgen.
Diese Europäische Norm behandelt darüber hinaus die zusätzlichen Anforderungen für die Brenner mit druckbeaufschlagten Teilen und/oder für die Gasbrenner, die Druckgeräte befeuern, siehe Anhang K.
Diese Europäische Norm behandelt ebenfalls Gebläsebrenner, die für biogene gasförmige Brennstoffe, Mischungen mit leitungsgeführtem Gas und spezielle gasförmige Brennstoffe bestimmt sind.
Diese Europäische Norm behandelt auch Brenner mit Ausrüstung für die Steigerung der Gesamt-Geräte-effizienz der Anlage; siehe Anhang M.

Brûleurs à air soufflé pour combustibles gazeux

Le présent document définit la terminologie, les exigences générales concernant la construction et le fonctionnement des brûleurs à gaz à air soufflé, leur équipement avec des dispositifs de régulation et de sécurité et les méthodes d’essais pour ces brûleurs.
Le présent document est applicable :
-   aux brûleurs automatiques à gaz avec ventilateur d’air de combustion (dénommés ci-après « brûleurs ») et aux composants de la ligne gaz, destinés à être utilisés sur des appareils de différents types et qui fonctionnent avec des combustibles gazeux ;
-   aux brûleurs à pré-mélange et aux brûleurs à mélange au nez ;
-   aux brûleurs individuels alimentant une seule chambre de combustion ;
-   aux brûleurs mono  et bicombustibles pour leur fonctionnement exclusif au gaz ;
-   au fonctionnement au gaz des brûleurs bicombustibles conçus pour fonctionner simultanément aux combustibles gazeux et liquides, les exigences de l'EN 267 s'appliquant également aux combustibles liquides.
Le présent document traite des risques significatifs des machines, des situations et événements dangereux liés aux brûleurs lorsqu’ils sont utilisés comme prévu et dans des conditions anormales raisonnablement prévisibles, voir l’Annexe J.
Le présent document spécifie les exigences à satisfaire afin d’assurer la sécurité lors de la réception, de la mise en route, de l’utilisation, de l’arrêt et de l’entretien.
Le présent document ne s’applique pas aux brûleurs spécialement conçus pour une utilisation dans un processus industriel réalisé sur un site industriel.
Le présent document traite également des exigences complémentaires s’appliquant aux brûleurs avec parties sous pression et/ou installés sur des appareils sous pression, voir l’Annexe K.
Le présent document traite également des brûleurs à air soufflé destinés à être utilisés avec des biogaz, des mélanges contenant des gaz distribués et des combustibles gazeux spéciaux.
Le présent document traite également des brûleurs équipés pour augmenter le rendement global de l'appareil, voir l'Annexe M.

Plinski ventilatorski gorilniki

General Information

Status
Published
Public Enquiry End Date
02-Mar-2017
Publication Date
09-Mar-2020
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
05-Feb-2020
Due Date
11-Apr-2020
Completion Date
10-Mar-2020

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SLOVENSKI STANDARD
SIST EN 676:2020
01-april-2020
Nadomešča:
SIST EN 676:2004+A2:2008
SIST EN 676:2004+A2:2008/AC:2009
Plinski ventilatorski gorilniki
Forced draught burners for gaseous fuels
Gebläsebrenner für gasförmige Brennstoffe
Brûleurs à air soufflé pour combustibles gazeux
Ta slovenski standard je istoveten z: EN 676:2020
ICS:
27.060.20 Plinski gorilniki Gas fuel burners
SIST EN 676:2020 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN 676:2020
---------------------- Page: 2 ----------------------
SIST EN 676:2020
EN 676
EUROPEAN STANDARD
NORME EUROPÉENNE
January 2020
EUROPÄISCHE NORM
ICS 27.060.20 Supersedes EN 676:2003+A2:2008
English Version
Forced draught burners for gaseous fuels

Brûleurs à air soufflé pour combustibles gazeux Gebläsebrenner für gasförmige Brennstoffe

This European Standard was approved by CEN on 9 October 2019.

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, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and

United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 676:2020 E

worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN 676:2020
EN 676:2020 (E)
Contents Page

European foreword ....................................................................................................................................................... 7

Introduction .................................................................................................................................................................... 9

1 Scope ................................................................................................................................................................. 10

2 Normative references ................................................................................................................................. 10

3 Terms and definitions ................................................................................................................................ 13

3.1 General terms and definitions ................................................................................................................. 13

3.2 Combustible gases ....................................................................................................................................... 15

3.3 Test rig and combustion chamber ......................................................................................................... 18

3.4 Composition of the gaseous combustion products .......................................................................... 18

3.5 Burner operation ......................................................................................................................................... 19

3.5.1 Gas rate ............................................................................................................................................................ 19

3.5.2 Permanent and intermittent burner operation ................................................................................ 20

3.6 Gas line components ................................................................................................................................... 21

3.7 Adjusting, control and safety devices ................................................................................................... 21

3.8 Sequencing times ......................................................................................................................................... 25

3.9 Combustion .................................................................................................................................................... 27

3.10 Diagrams ......................................................................................................................................................... 27

4 Constructional and operational requirements – safety requirements and/or

protective measures.................................................................................................................................... 27

4.1 Conversion to different gases .................................................................................................................. 27

4.2 Construction ................................................................................................................................................... 27

4.2.1 General ............................................................................................................................................................. 27

4.2.2 Design ............................................................................................................................................................... 28

4.2.3 Accessibility for maintenance and use ................................................................................................. 28

4.2.4 Soundness ....................................................................................................................................................... 28

4.2.5 Materials .......................................................................................................................................................... 28

4.2.6 Mounting ......................................................................................................................................................... 29

4.2.7 Connections .................................................................................................................................................... 29

4.3 Equipment ...................................................................................................................................................... 29

4.3.1 Motors and fans ............................................................................................................................................ 29

4.3.2 Electrical safety and EMC related to safety ......................................................................................... 30

4.3.3 Adjustable air damper ................................................................................................................................ 30

4.3.4 Gas line components ................................................................................................................................... 30

4.4 Functional and operational requirements ......................................................................................... 39

4.4.1 General function requirements .............................................................................................................. 39

4.4.2 Operational requirements ........................................................................................................................ 47

4.4.3 Heat input range of the burner ............................................................................................................... 48

4.4.4 Dual-fuel burner ........................................................................................................................................... 48

4.4.5 Working diagram and test diagram ...................................................................................................... 48

4.4.6 Determination of the flame stability and safe range of operation ............................................. 48

4.4.7 Limiting values for combustion emissions ......................................................................................... 48

4.4.8 Starting characteristics .............................................................................................................................. 51

4.4.9 Appliance categories ................................................................................................................................... 51

4.4.10 Reset from lock-out ..................................................................................................................................... 51

4.5 Machine safety requirements and/or protective measures ......................................................... 52

---------------------- Page: 4 ----------------------
SIST EN 676:2020
EN 676:2020 (E)

5 Test methods .................................................................................................................................................. 52

5.1 General ............................................................................................................................................................. 52

5.1.1 Test gases for forced draught burners .................................................................................................. 52

5.1.2 Test pressures ................................................................................................................................................ 52

5.1.3 Test rig .............................................................................................................................................................. 53

5.1.4 Types of test .................................................................................................................................................... 62

5.2 Functional tests ............................................................................................................................................. 62

5.2.1 General ............................................................................................................................................................. 62

5.2.2 Start-up ............................................................................................................................................................. 62

5.2.3 Pre-purge ......................................................................................................................................................... 62

5.2.4 Start-up heat input ....................................................................................................................................... 62

5.2.5 Ignition ............................................................................................................................................................. 62

5.2.6 Safety times ..................................................................................................................................................... 63

5.3 Operation ......................................................................................................................................................... 63

5.3.1 External soundness ...................................................................................................................................... 63

5.3.2 Resistance of the burner to over-heating ............................................................................................ 64

5.3.3 Temperature of the control and safety devices ................................................................................. 64

5.3.4 Ignition — flame stability .......................................................................................................................... 64

5.3.5 Operation — flame stability ...................................................................................................................... 66

5.3.6 Auxiliary electricity consumption (ErP) .............................................................................................. 67

5.3.7 Sound power level L (ErP) ..................................................................................................................... 67

5.4 Tests to be carried out on the working and test diagrams ............................................................ 67

5.4.1 Tests at point 1 .............................................................................................................................................. 67

5.4.2 Tests at point Hp1 ......................................................................................................................................... 68

5.4.3 Tests at points 2, 5 (single, multi-stage and modulating burners) and 6 (multi-stage

and modulating burners) ........................................................................................................................... 68

5.4.4 Tests at points Hp2 (single, multi-stage and modulating burners) and Hp6 (multi-

stage and modulating burners) ............................................................................................................... 69

5.4.5 Tests at point 3 .............................................................................................................................................. 69

5.4.6 Tests at point 4 .............................................................................................................................................. 69

5.4.7 Tests at first stage points or minimum heat input............................................................................ 70

5.4.8 Summary .......................................................................................................................................................... 70

5.5 Combustion ..................................................................................................................................................... 71

5.6 Start-up ............................................................................................................................................................. 72

5.7 Obtaining the heat input ............................................................................................................................ 72

5.7.1 Determination of heat input at reference conditions ...................................................................... 72

5.7.2 Determination of heat input at ambient conditions ........................................................................ 74

5.8 Electrical safety ............................................................................................................................................. 74

5.9 Verification of safety and /or protective measures ......................................................................... 75

6 Marking, labelling and packaging ........................................................................................................... 75

6.1 General ............................................................................................................................................................. 75

6.2 Data plate ......................................................................................................................................................... 75

6.3 Other marking ................................................................................................................................................ 76

6.4 Instructions for installation, adjustment, maintenance and operation.................................... 76

6.5 Packaging ......................................................................................................................................................... 78

6.6 Marking on the packaging ......................................................................................................................... 78

Annex A (normative) Determination of combustion characteristics — Carbon monoxide

and nitrogen oxides, conversion and corrections............................................................................. 79

A.1 CO content (Q ), calculation from ml/m into mg/kWh .............................................................. 79

A.2 NO content (Q ), calculation from ml/m into mg/kWh ........................................................ 80

x NO
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SIST EN 676:2020
EN 676:2020 (E)

A.3 Correction for the influence of combustion air temperature and humidity on NO

emissions Q ............................................................................................................................................. 81

NOx

A.4 NO mean value for evaluating the NO classes ................................................................................. 81

x x

A.5 CO content f .......................................................................................................................................... 82

2 CO
3 3

A.6 Other conversion factors for emissions, calculated from ml/m into mg/m at 3 % O

reference flue gas conditions ................................................................................................................... 82

Annex B (informative) Examples of control box sequencing .................................................................... 84

Annex C (informative) Test gases ........................................................................................................................ 85

C.1 General ............................................................................................................................................................. 85

C.2 Conditions for preparation of the test gases ...................................................................................... 85

C.3 Practical application of the test gases .................................................................................................. 86

Annex D (informative) Gas connections conditions in common use in the various countries ...... 89

Annex E (informative) Tests ................................................................................................................................... 91

E.1 Supplementary testing ............................................................................................................................... 91

E.2 Drawing review ............................................................................................................................................. 91

E.3 Individual test and inspection ................................................................................................................. 91

E.4 Test report ...................................................................................................................................................... 92

Annex F (informative) Use of alternative gas lines and test documentation ....................................... 93

F.1 Use of alternative gas lines ....................................................................................................................... 93

F.2 Test documentation .................................................................................................................................... 93

Annex G (informative) Void ................................................................................................................................... 94

Annex H (informative) Check of the air proving device .............................................................................. 95

Annex I (informative) Additional recommendations for specific applications .................................. 96

I.1 General ............................................................................................................................................................. 96

I.2 Pre-heating of the combustion air ......................................................................................................... 96

I.3 Continuous working of the air ventilator ............................................................................................ 96

I.4 Variable excess of combustion air ......................................................................................................... 96

I.5 Burner with start gas flame ...................................................................................................................... 96

I.6 Air filtering ..................................................................................................................................................... 97

Annex J (normative) Machine Directive (2006/42/CE) related hazards – safety

requirements and/or protective measures ....................................................................................... 98

J.1 General ............................................................................................................................................................. 98

J.2 List of significant hazards ......................................................................................................................... 98

J.3 Safety requirements and /or protective measures ......................................................................... 98

J.4 Verification of machine safety requirements and/or protective measures ......................... 102

J.5 Information for use ................................................................................................................................... 102

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SIST EN 676:2020
EN 676:2020 (E)

Annex K (normative) Additional requirements for burners with pressurized parts and

burners firing pressurized bodies as defined in Pressure Equipment Directive (PED)

2014/68/EU ................................................................................................................................................. 103

K.1 General .......................................................................................................................................................... 103

K.2 Pressurized parts ....................................................................................................................................... 103

K.3 Electrical safety and gas line components ........................................................................................ 104

K.4 Gas pressure regulator ............................................................................................................................ 104

K.5 High gas pressure over load protection device............................................................................... 104

K.6 Automatic safety shut-off valve ............................................................................................................ 105

K.7 Air proving device ..................................................................................................................................... 105

K.8 Automatic burner control system ........................................................................................................ 105

K.9 Means for draining and venting............................................................................................................ 105

K.10 General functions requirements .......................................................................................................... 106

K.11 External safety limiter ............................................................................................................................. 106

K.12 Design according to Annex L in conjunction with EN 60204-1.................................................. 107

K.13 Consideration: safety life cycle ............................................................................................................. 108

K.14 Tests of pressurized parts ...................................................................................................................... 109

K.15 Other marking ............................................................................................................................................. 110

K.16 Instructions for installation, adjustment, maintenance and operation................................. 110

Annex L (normative) Electrical requirements – modifications to EN 60204-1:2006 ..................... 112

L.1 Scope............................................................................................................................................................... 112

L.2 Normative references ............................................................................................................................... 112

L.3 Terms and definitions .............................................................................................................................. 112

L.4 General requirements .............................................................................................................................. 113

L.5 Incoming supply conductor terminations and devices for disconnecting and

switching off ................................................................................................................................................. 116

L.6 Protection against electric shock ......................................................................................................... 116

L.7 Protection of equipment ......................................................................................................................... 116

L.8 Equipotential bonding ............................................................................................................................. 116

L.9 Control circuits and control functions ............................................................................................... 116

L.10 Operator interface and machine-mounted control devices ....................................................... 126

L.11 Electrical equipment (Controlgear: location, mounting, and enclosures) ............................ 126

L.12 Conductors and cables ............................................................................................................................. 127

L.13 Wiring practices ......................................................................................................................................... 127

L.14 Electric motors and associated equipment ...................................................................................... 127

L.15 Accessories and lighting .......................................................................................................................... 127

L.16 Marking, warning signs and reference designations .................................................................... 127

---------------------- Page: 7 ----------------------
SIST EN 676:2020
EN 676:2020 (E)

L.17 Technical documentation ........................................................................................................................ 127

L.18 Verification ................................................................................................................................................... 128

Annex M (informative) Burner equipped to increase the efficiency .................................................... 129

Annex N (informative) Electrical interfaces for burners .......................................................................... 130

Annex O (informative) Environmental checklist EN 676 .......................................................................... 135

Annex P (informative) Guide for the applicability of the different standards on electrical

safety ............................................................................................................................................................... 137

Annex Q (informative) Verification procedures for market surveillance purposes (ErP) ........... 139

Q.1 General ........................................................................................................................................................... 139

Q.2 Minimization of the influence of the measurement procedure................................................. 139

Q.3 Verification of the declared parameters ............................................................................................ 139

Annex R (informative) Impact of the variations of the gas quality in EU gas grids to gas

burners .......................................................................................................................................................... 140

Annex S (informative) A-Deviations .................................................................

...

SLOVENSKI STANDARD
kSIST FprEN 676:2017
01-februar-2017
Plinski ventilatorski gorilniki
Forced draught burners for gaseous fuels
Gebläsebrenner für gasförmige Brennstoffe
Brûleurs à air soufflé pour combustibles gazeux
Ta slovenski standard je istoveten z: FprEN 676
ICS:
27.060.20 Plinski gorilniki Gas fuel burners
kSIST FprEN 676:2017 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
kSIST FprEN 676:2017
---------------------- Page: 2 ----------------------
kSIST FprEN 676:2017
FINAL DRAFT
EUROPEAN STANDARD
FprEN 676
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2016
ICS 27.060.20 Will supersede EN 676:2003+A2:2008
English Version
Forced draught burners for gaseous fuels

Brûleurs à air soufflé pour combustibles gazeux Gebläsebrenner für gasförmige Brennstoffe

This draft European Standard is submitted to CEN members for unique acceptance procedure. It has been drawn up by the

Technical Committee CEN/TC 131.

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-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, Former Yugoslav Republic of Macedonia, 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.

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
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels

© 2016 CEN All rights of exploitation in any form and by any means reserved Ref. No. FprEN 676:2016 E

worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
kSIST FprEN 676:2017
FprEN 676:2016 (E)
Contents Page

European foreword ....................................................................................................................................................... 9

Introduction ................................................................................................................................................................. 10

1 Scope ................................................................................................................................................................. 11

2 Normative references ................................................................................................................................. 11

3 Terms and definitions ................................................................................................................................ 14

3.1 General terms and definitions ................................................................................................................. 14

3.2 Combustible gases ....................................................................................................................................... 16

3.3 Test rig and combustion chamber ......................................................................................................... 18

3.4 Composition of the gaseous combustion products .......................................................................... 19

3.5 Burner operation ......................................................................................................................................... 19

3.5.1 Gas rate ............................................................................................................................................................ 19

3.5.2 Permanent and intermittent burner operation ................................................................................ 21

3.6 Gas line components ................................................................................................................................... 21

3.7 Adjusting, control and safety devices ................................................................................................... 22

3.8 Sequencing times ......................................................................................................................................... 25

3.9 Combustion .................................................................................................................................................... 27

3.10 Diagrams ......................................................................................................................................................... 28

4 Constructional and operational requirements – safety requirements and/or

protective measures.................................................................................................................................... 28

4.1 Conversion to different gases .................................................................................................................. 28

4.2 Construction ................................................................................................................................................... 28

4.2.1 General ............................................................................................................................................................. 28

4.2.2 Design ............................................................................................................................................................... 28

4.2.3 Accessibility for maintenance and use ................................................................................................. 29

4.2.4 Soundness ....................................................................................................................................................... 29

4.2.5 Materials .......................................................................................................................................................... 29

4.2.6 Mounting ......................................................................................................................................................... 29

4.2.7 Connections .................................................................................................................................................... 30

4.3 Equipment ...................................................................................................................................................... 30

4.3.1 Motors and fans ............................................................................................................................................ 30

4.3.2 Electrical safety and EMC related to safety ......................................................................................... 30

4.3.3 Adjustable air damper ................................................................................................................................ 31

4.3.4 Gas line components ................................................................................................................................... 31

4.4 Functional and operational requirements ......................................................................................... 40

4.4.1 General function requirements .............................................................................................................. 40

4.4.2 Operational requirements ........................................................................................................................ 48

4.4.3 Heat input range of the burner ............................................................................................................... 49

4.4.4 Dual-fuel burner ........................................................................................................................................... 49

4.4.5 Working diagram and test diagram ...................................................................................................... 49

4.4.6 Determination of the flame stability and safe range of operation ............................................. 49

4.4.7 Limiting values for combustion emissions ......................................................................................... 49

4.4.8 Starting characteristics .............................................................................................................................. 52

4.4.9 Appliance categories ................................................................................................................................... 52

4.4.10 Reset from lock-out ..................................................................................................................................... 52

4.5 Machine safety requirements and/or protective measures ......................................................... 53

---------------------- Page: 4 ----------------------
kSIST FprEN 676:2017
FprEN 676:2016 (E)

5 Test methods .................................................................................................................................................. 53

5.1 General ............................................................................................................................................................. 53

5.1.1 Test gases for forced draught burners .................................................................................................. 53

5.1.2 Test pressures ................................................................................................................................................ 53

5.1.3 Test rig .............................................................................................................................................................. 54

5.1.4 Types of test .................................................................................................................................................... 63

5.2 Functional tests ............................................................................................................................................. 63

5.2.1 General ............................................................................................................................................................. 63

5.2.2 Start-up ............................................................................................................................................................. 63

5.2.3 Pre-purge ......................................................................................................................................................... 63

5.2.4 Start-up heat input ....................................................................................................................................... 63

5.2.5 Ignition ............................................................................................................................................................. 63

5.2.6 Safety times ..................................................................................................................................................... 64

5.3 Operation ......................................................................................................................................................... 64

5.3.1 External soundness ...................................................................................................................................... 64

5.3.2 Resistance of the burner to over-heating ............................................................................................ 65

5.3.3 Temperature of the control and safety devices ................................................................................. 65

5.3.4 Ignition — flame stability .......................................................................................................................... 65

5.3.5 Operation — flame stability ...................................................................................................................... 67

5.3.6 Auxiliary electricity consumption (ErP) .............................................................................................. 68

5.3.7 Sound power level L (ErP) ..................................................................................................................... 68

5.4 Tests to be carried out on the working and test diagrams ............................................................ 68

5.4.1 Tests at point 1 .............................................................................................................................................. 68

5.4.2 Tests at point Hp1 ......................................................................................................................................... 69

5.4.3 Tests at points 2, 5 (single, multi-stage and modulating burners) and 6 (multi-stage

and modulating burners) ........................................................................................................................... 69

5.4.4 Tests at points Hp2 (single, multi-stage and modulating burners) and Hp6 (multi-

stage and modulating burners) ............................................................................................................... 70

5.4.5 Tests at point 3 .............................................................................................................................................. 70

5.4.6 Tests at point 4 .............................................................................................................................................. 70

5.4.7 Tests at first stage points or minimum heat input............................................................................ 71

5.4.8 Summary .......................................................................................................................................................... 71

5.5 Combustion ..................................................................................................................................................... 72

5.6 Start-up ............................................................................................................................................................. 73

5.7 Obtaining the heat input ............................................................................................................................ 73

5.7.1 Determination of heat input at reference conditions ...................................................................... 73

5.7.2 Determination of heat input at ambient conditions ........................................................................ 75

5.8 Electrical safety ............................................................................................................................................. 75

5.9 Verification of safety and /or protective measures ......................................................................... 76

6 Marking, labelling and packaging ........................................................................................................... 76

6.1 General ............................................................................................................................................................. 76

6.2 Data plate ......................................................................................................................................................... 76

6.3 Other marking ................................................................................................................................................ 77

6.4 Instructions for installation, adjustment, maintenance and operation.................................... 77

6.5 Packaging ......................................................................................................................................................... 79

6.6 Marking on the packaging ......................................................................................................................... 79

Annex A (normative) Determination of combustion characteristics — Carbon monoxide and

nitrogen oxides, conversion and corrections ..................................................................................... 80

A.1 CO content (Q ), calculation from ml/m into mg/kWh .............................................................. 80

A.2 NO content (Q ), calculation from ml/m into mg/kWh ........................................................ 81

x NO
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A.3 Correction for the influence of combustion air temperature and humidity on NO

emissions Q ............................................................................................................................................. 82

NOx

A.4 NO mean value for evaluating the NO classes ................................................................................. 82

x x

A.5 CO content f .......................................................................................................................................... 83

2 CO
3 3

A.6 Other conversion factors for emissions, calculated from ml/m into mg/m at 3 % O

reference flue gas conditions ................................................................................................................... 83

Annex B (informative) Examples of control box sequencing ...................................................................... 85

Annex C (informative) Test gases .......................................................................................................................... 86

C.1 General ............................................................................................................................................................. 86

C.2 Conditions for preparation of the test gases ...................................................................................... 86

C.3 Practical application of the test gases .................................................................................................. 87

C.3.1 Choice of test gases ...................................................................................................................................... 87

C.3.2 Conditions of supply and adjustment of the burner ........................................................................ 89

Annex D (informative) Gas connections conditions in common use in the various countries ........ 90

Annex E (informative) Tests ..................................................................................................................................... 92

E.1 Supplementary testing ............................................................................................................................... 92

E.2 Drawing review ............................................................................................................................................. 92

E.3 Individual test and inspection ................................................................................................................. 92

E.4 Test report ...................................................................................................................................................... 93

Annex F (informative) Use of alternative gas lines and test documentation ....................................... 94

F.1 Use of alternative gas lines ....................................................................................................................... 94

F.2 Test documentation .................................................................................................................................... 94

Annex G (informative) Void ..................................................................................................................................... 95

Annex H (informative) Check of the air proving device ................................................................................ 96

Annex I (informative) Additional recommendations for specific applications .................................... 97

I.1 General ............................................................................................................................................................. 97

I.2 Pre-heating of the combustion air ......................................................................................................... 97

I.3 Continuous working of the air ventilator ............................................................................................ 97

I.4 Variable excess of combustion air ......................................................................................................... 97

I.5 Burner with start gas flame ...................................................................................................................... 97

I.6 Air filtering ..................................................................................................................................................... 98

Annex J (normative) Machine Directive (2006/42/CE) related hazards – safety

requirements and/or protective measures ....................................................................................... 99

J.1 General ............................................................................................................................................................. 99

J.2 List of significant hazards ......................................................................................................................... 99

J.3 Safety requirements and /or protective measures ......................................................................... 99

J.3.1 General ............................................................................................................................................................. 99

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J.3.2 Additional requirements ........................................................................................................................ 102

J.3.2.1 Mechanical safety, stability and control devices ............................................................................ 102

J.3.2.2 Motors and fans .......................................................................................................................................... 102

J.3.2.3 Electrical safety .......................................................................................................................................... 102

J.4 Verification of machine safety requirements and/or protective measures ......................... 103

J.5 Information for use ................................................................................................................................... 103

J.5.1 General .......................................................................................................................................................... 103

J.5.2 Instructions for installation, adjustment, maintenance and operation................................. 103

Annex K (normative) Additional requirements for burners with pressurized parts and

burners firing pressurized bodies as defined in Pressure Equipment Directive (PED)

2014/68/EU ................................................................................................................................................. 104

K.1 General .......................................................................................................................................................... 104

K.2 Pressurized parts ....................................................................................................................................... 104

K.2.1 Design ............................................................................................................................................................. 104

K.2.2 Materials ....................................................................................................................................................... 104

K.2.3 Permanent joints ....................................................................................................................................... 105

K.3 Electrical safety and gas line components ........................................................................................ 105

K.3.1 Electrical safety .......................................................................................................................................... 105

K.3.2 Gas line components ................................................................................................................................. 105

K.4 Gas pressure regulator ............................................................................................................................ 105

K.5 High gas pressure over load protection device............................................................................... 105

K.6 Automatic safety shut-off valve ............................................................................................................ 106

K.7 Air proving device ..................................................................................................................................... 106

K.8 Automatic burner control system ........................................................................................................ 106

K.9 Means for draining and venting............................................................................................................ 106

K.10 General functions requirements .......................................................................................................... 107

K.11 External safety limiter ............................................................................................................................. 107

K.12 Design according to Annex L in conjunction with EN 60204-1.................................................. 108

K.12.1 General .......................................................................................................................................................... 108

K.12.2 Pressure control ......................................................................................................................................... 108

K.12.3 Burner control and flame detection.................................................................................................... 108

K.12.4 Safe shut off of the gas supply ............................................................................................................... 109

K.12.5 Air/fuel ratio control ................................................................................................................................ 109

K.12.6 Integration of the superior safety equipment of the boiler and of the firing system. ...... 109

K.13 Consideration: safety life cycle ............................................................................................................. 109

K.14 Tests of pressurized parts ...................................................................................................................... 110

K.14.1 Component pressure strength test ...................................................................................................... 110

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K.14.2 Component design mechanical deformation test ........................................................................... 111

K.14.3 Component design welded joint test ................................................................................................... 111

K.14.4 External soundness ................................................................................................................................... 111

K.15 Other marking ............................................................................................................................................. 111

K.16 Instructions for installation, adjustment, maintenance and operation ................................. 111

Annex L (normative) Electrical requirements – modifications to EN 60204-1:2006 ....................... 113

L.1 Scope ............................................................................................................................................................... 113

L.2 Normative references ............................
...

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