SIST EN 15420:2011
(Main)Gas-fired central heating boilers - Type C boilers of nominal heat input exceeding 70 kW, but not exceeding 1 000 kW
Gas-fired central heating boilers - Type C boilers of nominal heat input exceeding 70 kW, but not exceeding 1 000 kW
This document specifies the requirements and test methods concerning, in particular, the construction, safety, fitness for purpose, and rational use of energy, as well as the classification and marking of gas-fired central heating boilers that are fitted with atmospheric burners, fan-assisted atmospheric burners or fully premixed burners, and are hereafter referred to as "boilers".
This document applies to boilers of type C, as listed in 4.2:
- that use one or more combustible gases of the three gas families at the pressures stated in
Tables 14 and 15;
- that have a nominal heat input (on the basis of net calorific value) exceeding 70 kW, but not exceeding 1 000 kW, including modular boilers;
- where the temperature of the heat transfer fluid does not exceed 105 °C during normal operation;
- where the maximum operating pressure in the water circuit does not exceed 6 bar;
- which can give rise to condensation under certain circumstances.
The document applies to boilers designed for sealed water systems or for open water systems.
The document does not contain all the requirements necessary for boilers:
- Intended to be installed in the open or in living rooms;
- permanently fitted with more than one flue outlet;
- of the condensing type;
- intended to be connected to a common flue having mechanical extraction;
- type C21, C41, C51, C61, C7 and C81 boilers;
- fitted with a forced draught burner in accordance with EN 676;
- producing hot water for domestic purposes. This document only covers type testing.
Heizkessel für gasförmige Brennstoffe - Heizkessel des Typs C mit einer Nennwärmebelastung größer als 70 kW aber gleich oder kleiner als 1 000 kW
Diese Norm behandelt die Anforderungen und die Prüfmethoden im Hinblick auf die Konstruktion, die
Sicherheit, die Gebrauchstauglichkeit und den wirtschaftlichen Einsatz von Energie sowie die Klassifizierung
und die Kennzeichnung von gasbeheizten Zentralheizungskesseln mit atmosphärischen Brennern, mit
gebläseunterstützten atmosphärischen Brennern oder mit voll vorgemischten Brennern, die im weiteren
Verlauf als „Kessel“ bezeichnet werden.
Diese Norm behandelt, wie in 4.2 aufgelistet, Kessel der Bauart C:
- die ein oder mehrere Brenngase der drei Gasfamilien bei den in den Tabellen 14 und 15 angegebenen
Drücken verwenden;
- die Nennwärmebelastung (bezogen auf den Heizwert) über 70 kW, aber nicht über 1 000 kW (einschließlich
der Kombikessel) haben;
- bei denen die Temperatur der Wärme übertragenden Flüssigkeit beim üblichen Betrieb 105 °C nicht
überschreitet;
- bei denen der höchste Betriebsdruck im Wasserkreislauf 6 bar nicht überschreitet;
- bei denen unter bestimmten Umständen Kondensation eintreten kann.
Die Norm gilt sowohl für Kessel mit geschlossenem als auch mit offenem Wasserkreislauf.
Diese Norm enthält nicht alle für Kessel erforderlichen Anforderungen:
- die im Freien oder in Wohnräumen aufgestellt werden;
- die dauerhaft mit mehr als einem Abgasstutzen ausgerüstet sind;
- der Bauart „Brennwertkessel“;
- die an eine gemeinsame Abgasanlage mit mechanischer Abgasabführung anzuschließen sind;
- der Bauarten C21, C41, C51, C61, C71 und C81;
- die in Übereinstimmung mit EN 676 mit einem Gebläsebrenner ausgerüstet sind;
- die Warmwasser für den sanitären Bedarf erzeugen.
Diese Norm gilt nur für Typprüfungen.
Chaudières de chauffage central utilisant les combustibles gazeaux - Chaudières de type C dont le débit calorifique nominal est supérieur à 70 kW mais inférieur ou égal à 1 000 kW
Le présent document spécifie les exigences et les méthodes d’essai concernant les chaudières de chauffage
central utilisant les combustibles gazeux et équipées de brûleurs atmosphériques, de brûleurs
atmosphériques assistés d’un ventilateur ou de brûleurs à prémélange total, ci-après dénommées
« chaudières », en particulier leur conception, leur sécurité, leur aptitude à la fonction, leur utilisation
rationnelle de l’énergie, ainsi que leur classification et leur marquage.
Le présent document s’applique aux chaudières de type C, telles qu’énumérées en 4.2 :
- utilisant un ou plusieurs combustibles gazeux appartenant aux trois familles de gaz et aux pressions
indiquées dans les Tableaux 14 et 15 ;
- de débit calorifique nominal (sur pouvoir calorifique inférieur) compris entre 70 kW et 1 000 kW, y compris
les chaudières modulaires ;
- dont la température du fluide caloporteur ne dépasse pas 105 °C en fonctionnement normal ;
- dont la pression maximale de service dans le circuit d’eau ne dépasse pas 6 bar ;
- pouvant provoquer une condensation dans certaines circonstances.
Le présent document s’applique aux chaudières à circuit d’eau fermé ou ouvert.
Le document ne contient pas toutes les exigences nécessaires pour les chaudières :
- destinées à être installées en plein air ou dans des locaux d’habitation ;
- dotées de manière permanente de plusieurs conduits d’évacuation des produits de combustion ;
- à condensation ;
- destinées à être raccordées à une cheminée commune à extraction mécanique ;
- de type C21, C41, C51, C61, C7 et C81 ;
- dotées d’un brûleur à air soufflé conforme à l’EN 676 ;
- produisant de l’eau chaude pour usage domestique.
Le présent document couvre uniquement les essais de type.
Plinski kotli za centralno gretje - Tip kotlov C z imensko močjo nad 70 kW do vključno 1000 kW
Ta dokument določa zahteve in preskusne metode, ki zlasti zadevajo izgradnjo, varnost, zahteve za uporabnost in racionalno uporabo energije, kot tudi klasifikacijo in označevanje plinskih kotlov za centralno ogrevanje, ki so opremljeni z atmosferskimi gorilniki, z atmosferskimi gorilniki z ventilatorjem ali v celoti vnaprej pripravljeni gorilniki, v nadaljevanju »kotli«.
Ta dokument velja za kotle tipa C, kot so navedeni v točki 4.2:
- ki uporabljajo enega ali več vnetljivih plinov iz treh družin plinov pri tlakih, navedenih v preglednicah 14 in 15.
- ki imajo nazivni dovod toplote (na osnovi neto kalorične vrednosti), ki presega 70 kW, vendar ne presega 1000 kW, vključno z modularnimi kotli;
- kjer temperatura tekočine za prenos toplote ne presega 105 °C med običajnim delovanjem;
- kjer najvišji obratovalni tlak v vodnem tokokrogu ne presega 6 barov;
- ki lahko pod določenimi okoliščinami povzročijo kondenzacijo.
Ta dokument velja za kotle, načrtovane za zaprte vodne sisteme, ali za odprte vodne sisteme.
Ta dokument ne vsebuje vseh zahtev, potrebnih za kotle:
- namenjene namestitvi v odprt prostor ali dnevni prostor;
- na katere je stalno nameščen več kot en izhod dimnika;
- kondenzacijskega tipa;
- namenjene povezavi s skupnim dimnikom z mehansko ekstrakcijo;
- tipa C21, C41, C51, C61, C7 in C81;
- opremljene z gorilniki na prisilni vlek v skladu z EN 676;
- ki proizvajajo vročo vodo za gospodinjstva. Ta dokument zajem zgolj tipsko preskušanje.
General Information
Relations
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Heizkessel für gasförmige Brennstoffe - Heizkessel des Typs C mit einer Nennwärmebelastung größer als 70 kW aber gleich oder kleiner als 1 000 kWChaudières de chauffage central utilisant les combustibles gazeaux - Chaudières de type C dont le débit calorifique nominal est supérieur à 70 kW mais inférieur ou égal à 1 000 kWGas-fired central heating boilers - Type C boilers of nominal heat input exceeding 70 kW, but not exceeding 1 000 kW97.100.20Plinski grelnikiGas heaters91.140.10Sistemi centralnega ogrevanjaCentral heating systemsICS:Ta slovenski standard je istoveten z:EN 15420:2010SIST EN 15420:2011en,fr,de01-januar-2011SIST EN 15420:2011SLOVENSKI
STANDARD
SIST EN 15420:2011
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 15420
December 2010 ICS 91.140.10 English Version
Gas-fired central heating boilers -Type C boilers of nominal heat input exceeding 70 kW, but not exceeding 1 000 kW
Chaudières de chauffage central utilisant les combustibles gazeux - Chaudières de type C dont le débit calorifique nominal est supérieur à 70 kW mais inférieur ou égal à 1 000 kW
Heizkessel für gasförmige Brennstoffe - Heizkessel der Bauart C mit einer Nennwärmebelastung größer als 70 kW aber gleich oder kleiner als 1 000 kW This European Standard was approved by CEN on 23 October 2010.
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 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 Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2010 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 15420:2010: ESIST EN 15420:2011
EN 15420:2010 (E) 2 Contents Page Foreword . 71 Scope. 82 Normative references . 83 Terms and definitions . 103.1 Combustible gases . 103.2 Constituent parts of the boiler . 123.2.1 Gas supply . 123.2.2 Air supply and combustion products evacuation . 133.2.3 Adjusting, control and safety devices . 153.3 Operation of the boiler. 173.3.1 Gas rates . 173.3.2 Outputs. 183.3.3 Efficiency . 183.3.4 Gas combustion . 193.3.5 Times . 193.3.6 spark restoration . 203.3.7 recycling . 203.3.8 controlled shutdown . 203.3.9 safety shutdown . 203.3.10 Locking out . 203.4 Auxiliary energy . 213.4.1 electric auxiliary energy . 213.5 Country of destination . 213.5.1 direct country of destination . 213.5.2 indirect country of destination . 214 Classification of boilers. 214.1 Gases and categories . 214.2 Mode of air supply and evacuation of the combustion products . 224.2.1 Type C Boilers . 224.2.2 Type of installation of the boiler . 224.2.3 Presence and position of a fan . 234.3 Classification according to operating conditions) . 234.3.1 Standard boiler . 234.3.2 Low-temperature boiler . 234.3.3 Gas condensing boiler) . 244.4 Modular boiler . 245 Constructional requirements . 245.1 General . 245.2 Conversion to different gases . 245.3 Materials and method of construction . 245.3.1 General . 245.3.2 Materials and thicknesses of walls or tubes under water pressure . 255.3.3 Thermal insulation . 335.4 Combustion products evacuation duct . 345.4.1 Stability under mechanical loading . 345.4.2 Stability under exposure to heat . 345.4.3 Corrosion resistance . 345.4.4 Resistance to condensate and moisture under normal operating conditions . 345.5 Design . 34SIST EN 15420:2011
EN 15420:2010 (E) 3 5.5.1 General . 345.5.2 Modular boilers . 355.6 Use and servicing . 355.7 Connections to the gas and water pipes . 355.7.1 General . 355.7.2 Connections to the gas pipe . 355.7.3 Connections to the central heating circuit . 365.8 Soundness . 365.8.1 Soundness of the gas circuit . 365.8.2 Soundness of the combustion circuit . 365.9 Supply of combustion air and the evacuation of the combustion products . 375.9.1 General . 375.9.2 Air supply and combustion products evacuation duct) . 375.9.3 Terminal . 375.9.4 Terminal guard . 375.9.5 Fitting piece . 385.9.6 Control dampers in the air or combustion products circuit . 385.9.7 Special requirements for certain components of boilers with a fan . 385.9.8 Condensate discharge. 395.10 Checking the state of operation . 405.11 Drainage . 405.12 Electrical equipment . 405.13 Operational safety in the event of failure of the auxiliary energy . 405.14 Adjusting, control and safety devices . 405.14.1 General . 405.14.2 Adjusters and range rating devices . 415.14.3 Gas circuit . 415.14.4 Gas pressure regulator. 435.14.5 Ignition devices . 435.14.6 Flame supervision systems . 445.14.7 Thermostats and water temperature limiting devices . 455.15 Burners . 465.16 Pressure test points . 465.17 Chemical composition of the condensate . 466 Operational requirements . 466.1 General . 466.2 Soundness . 466.2.1 Soundness of the gas circuit . 466.2.2 Soundness of the combustion circuit . 476.2.3 Soundness of the water circuit . 486.3 Nominal, maximum and minimum heat inputs, and nominal output . 486.3.1 Nominal heat input or maximum and minimum heat inputs . 486.3.2 Adjustment of the heat input by the downstream pressure . 486.3.3 Ignition rate . 486.3.4 Nominal output . 486.3.5 Gas pressure regulator. 486.4 Safety of operation . 496.4.1 Limiting temperatures . 496.4.2 lgnition – Cross-lighting – Flame stability. 506.4.3 Pre-purge . 516.4.4 Functioning of a permanent ignition burner when the fan stops during the standby time . 526.5 Adjusting, control and safety devices . 526.5.1 General . 526.5.2 Ignition devices . 526.5.3 Flame supervision devices . 536.5.4 Ignition burner and ignition rates . 556.5.5 Air proving . 55SIST EN 15420:2011
EN 15420:2010 (E) 4 6.5.6 Gas pressure switches . 566.5.7 Control thermostat and safety temperature limiter . 576.5.8 Condensate discharge blockage . 586.6 Combustion . 586.6.1 Carbon monoxide . 586.6.2 Limit conditions . 586.6.3 Special conditions . 586.6.4 Sooting . 586.6.5 Other pollutants . 586.7 Useful efficiencies . 596.7.1 Useful efficiency at the nominal heat input . 596.7.2 Useful efficiency at part load . 596.8 Criteria for condensation in the flue . 606.9 Resistance of the materials to pressure . 606.9.1 General . 606.9.2 Boilers of sheet steel or non-ferrous metals . 606.9.3 Boilers of cast iron and cast materials . 606.10 Hydraulic resistance . 616.11 Condensation in the boiler . 616.12 Combustion air and flue dampers . 617 Test methods . 617.1 General . 617.1.1 Characteristics of the reference and limit gases . 617.1.2 General test conditions . 677.2 Soundness . 707.2.1 Soundness of the gas circuit . 707.2.2 Soundness of the combustion circuit . 717.2.3 Soundness of the water circuit . 727.3 Nominal, maximum and minimum heat inputs, and nominal output . 727.3.1 Nominal heat input or maximum and minimum heat inputs . 727.3.2 Adjustment of the heat input by the downstream pressure . 737.3.3 Ignition rate . 747.3.4 Nominal output . 747.3.5 Gas pressure regulator. 747.4 Safety of operation . 747.4.1 Limiting temperatures . 747.4.2 Ignition - Cross-lighting - Flame stability . 767.4.3 Pre-purge . 797.4.4 Functioning of a permanent ignition burner when the fan stops during standby time . 807.5 Adjusting, control and safety devices . 807.5.1 General . 807.5.2 Ignition devices . 807.5.3 Flame supervision devices . 817.5.4 Ignition burner and ignition rates . 837.5.5 Air proving . 837.5.6 Gas pressure switches . 857.5.7 Control thermostat and safety temperature limiter . 857.5.8 Condensate discharge blockage . 877.6 Combustion . 877.6.1 Carbon monoxide . 877.6.2 Limit conditions . 887.6.3 Special conditions . 897.6.4 Other pollutants . 917.7 Useful efficiencies . 957.7.1 Useful efficiency at the nominal heat input . 957.7.2 Useful efficiency at part load . 967.8 Criteria for condensation in the flue . 101SIST EN 15420:2011
EN 15420:2010 (E) 5 7.8.1 Determination of flue losses . 1017.8.2 Minimum temperature of the combustion products . 1027.9 Resistance of materials to pressure . 1027.9.1 General . 1027.9.2 Boilers of sheet steel or non-ferrous metals . 1027.9.3 Boilers of cast iron and cast materials . 1037.10 Hydraulic resistance . 1037.11 Condensation in the boiler . 1037.12 Combustion air and flue dampers . 1038 Marking and instructions . 1048.1 Marking of the boiler . 1048.1.1 General . 1048.1.2 Data plate . 1048.1.3 Supplementary marking . 1068.1.4 Packaging . 1088.1.5 Warnings on the boiler and on the packaging . 1088.1.6 Other information . 1088.2 Instructions . 1088.2.1 Technical instructions for the installer . 1088.2.2 For installation of the combustion circuit . 1098.2.3 Use and maintenance instructions for the user . 1108.2.4 Conversion instructions . 1118.3 Presentation . 111Annex A (informative)
National situations . 127A.1 Categories marketed in the various countries . 127A.2 Special categories marketed nationally or locally . 129A.3 Gas groups distributed locally . 129A.4 Boiler supply pressures . 130A.5 Gas connections in common use in the various countries . 132Annex B (informative)
Special national conditions . 133Annex C (informative)
A-deviations . 134Annex D (informative)
Classification of type C boilers . 135Annex E (informative)
Practical method of calibrating the test rig to enable
the heat loss Dp to be determined . 142Annex F (informative)
Main symbols and abbreviations used . 143Annex G (informative)
Compilation of test conditions . 144Annex H (informative)
Valving .
...
SLOVENSKI STANDARD
kSIST FprEN 15420:2010
01-julij-2010
3OLQVNLNRWOL]DFHQWUDOQRRJUHYDQMH7LSNRWORY&]LPHQVNRPRþMRQDGN:GR
YNOMXþQRN:
Gas-fired central heating boilers - Type C boilers of nominal heat input exceeding 70 kW,
but not exceeding 1 000 kW
Heizkessel für gasförmige Brennstoffe - Heizkessel des Typs C mit einer
Nennwärmebelastung größer als 70 kW aber gleich oder kleiner als 1 000 kW
Chaudières de chauffage central utilisant les combustibles gazeaux - Chaudières de type
C dont le débit calorifique nominal est supérieur à 70 kW mais inférieur ou égal à 1 000
kW
Ta slovenski standard je istoveten z: FprEN 15420
ICS:
91.140.10 Sistemi centralnega Central heating systems
ogrevanja
kSIST FprEN 15420:2010 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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kSIST FprEN 15420:2010
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kSIST FprEN 15420:2010
EUROPEAN STANDARD
FINAL DRAFT
FprEN 15420
NORME EUROPÉENNE
EUROPÄISCHE NORM
April 2010
ICS 91.140.10
English Version
Gas-fired central heating boilers - Type C boilers of nominal heat
input exceeding 70 kW, but not exceeding 1000 kW
Chaudières de chauffage central utilisant les combustibles Heizkessel für gasförmige Brennstoffe - Heizkessel des
gazeaux - Chaudières de type C dont le débit calorifique Typs C mit einer Nennwärmebelastung größer als 70 kW
nominal est supérieur à 70 kW mais inférieur ou égal à aber gleich oder kleiner als 1000 kW
1000 kW
This draft European Standard is submitted to CEN members for unique acceptance procedure. It has been drawn up by the Technical
Committee CEN/TC 109.
If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations which
stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other language
made by translation under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the
same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland,
Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2010 CEN All rights of exploitation in any form and by any means reserved Ref. No. FprEN 15420:2010: E
worldwide for CEN national Members.
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kSIST FprEN 15420:2010
FprEN 15420:2010 (E)
Contents Page
Foreword . 7
1 Scope. 8
2 Normative references . 8
3 Terms and definitions . 10
3.1 Combustible gases . 10
3.2 Constituent parts of the boiler . 12
3.2.1 Gas supply . 12
3.2.2 Air supply and combustion products evacuation . 13
3.2.3 Adjusting, control and safety devices . 15
3.3 Operation of the boiler. 17
3.3.1 Gas rates . 17
3.3.2 Outputs. 18
3.3.3 Efficiency . 18
3.3.4 Gas combustion . 19
3.3.5 Times . 19
3.3.6 spark restoration . 20
3.3.7 recycling . 20
3.3.8 controlled shutdown . 20
3.3.9 safety shutdown . 20
3.3.10 Locking out . 20
3.4 Auxiliary Energy . 21
3.4.1 electric auxiliary energy . 21
3.5 Country of destination . 21
3.5.1 direct country of destination . 21
3.5.2 indirect country of destination . 21
4 Classification of boilers. 21
4.1 Gases and categories . 21
4.2 Mode of air supply and evacuation of the combustion products . 22
4.2.1 Type C Boilers . 22
4.2.2 Type of installation of the boiler . 22
4.2.3 Presence and position of a fan . 23
)
4.3 Classification according to operating conditions . 23
4.3.1 Standard boiler . 23
4.3.2 Low-temperature boiler . 23
)
4.3.3 Gas condensing boiler . 24
4.4 Modular boiler . 24
5 Constructional requirements . 24
5.1 General . 24
5.2 Conversion to different gases . 24
5.3 Materials and method of construction . 24
5.3.1 General . 24
5.3.2 Materials and thicknesses of walls or tubes under water pressure . 25
5.3.3 Thermal insulation . 33
5.4 Combustion products evacuation duct . 33
5.4.1 Stability under mechanical loading . 33
5.4.2 Stability under exposure to heat . 33
5.4.3 Corrosion resistance . 34
5.4.4 Resistance to condensate and moisture under normal operating conditions . 34
5.5 Design . 34
2
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kSIST FprEN 15420:2010
FprEN 15420:2010 (E)
5.5.1 General . 34
5.5.2 Modular boilers . 34
5.6 Use and servicing . 34
5.7 Connections to the gas and water pipes . 35
5.7.1 General . 35
5.7.2 Connections to the gas pipe . 35
5.7.3 Connections to the central heating circuit . 35
5.8 Soundness . 36
5.8.1 Soundness of the gas circuit . 36
5.8.2 Soundness of the combustion circuit . 36
5.9 Supply of combustion air and the evacuation of the combustion products . 36
5.9.1 General . 36
)
5.9.2 Air supply and combustion products evacuation duct . 37
5.9.3 Terminal . 37
5.9.4 Terminal guard . 37
5.9.5 Fitting piece . 37
5.9.6 Control dampers in the air or combustion products circuit . 37
5.9.7 Special requirements for certain components of boilers with a fan . 38
5.9.8 Condensate discharge. 39
5.10 Checking the state of operation . 39
5.11 Drainage . 39
5.12 Electrical equipment . 40
5.13 Operational safety in the event of failure of the auxiliary energy . 40
5.14 Adjusting, control and safety devices . 40
5.14.1 General . 40
5.14.2 Adjusters and range rating devices . 40
5.14.3 Gas circuit . 41
5.14.4 Gas pressure regulator. 42
5.14.5 Ignition devices . 43
5.14.6 Flame supervision systems . 43
5.14.7 Thermostats and water temperature limiting devices . 44
5.15 Burners . 45
5.16 Pressure test points . 45
5.17 Chemical composition of the condensate . 45
6 Operational requirements . 46
6.1 General . 46
6.2 Soundness . 46
6.2.1 Soundness of the gas circuit . 46
6.2.2 Soundness of the combustion circuit . 46
6.2.3 Soundness of the water circuit . 47
6.3 Nominal, maximum and minimum heat inputs, and nominal output . 47
6.3.1 Nominal heat input or maximum and minimum heat inputs . 47
6.3.2 Adjustment of the heat input by the downstream pressure . 47
6.3.3 Ignition rate . 47
6.3.4 Nominal output . 47
6.3.5 Gas pressure regulator. 48
6.4 Safety of operation . 48
6.4.1 Limiting temperatures . 48
6.4.2 lgnition – Cross-lighting – Flame stability. 49
6.4.3 Pre-purge . 50
6.4.4 Functioning of a permanent ignition burner when the fan stops during the
standby time . 51
6.5 Adjusting, control and safety devices . 51
6.5.1 General . 51
6.5.2 Ignition devices . 51
6.5.3 Flame supervision devices . 52
6.5.4 Ignition burner and ignition rates . 54
6.5.5 Air proving . 54
3
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FprEN 15420:2010 (E)
6.5.6 Gas pressure switches . 55
6.5.7 Control thermostat and safety temperature limiter . 56
6.5.8 Condensate discharge blockage . 57
6.6 Combustion . 57
6.6.1 Carbon Monoxide . 57
6.6.2 Limit conditions . 57
6.6.3 Special conditions . 57
6.6.4 Sooting . 57
6.6.5 Other pollutants . 57
6.7 Useful efficiencies . 58
6.7.1 Useful efficiency at the nominal heat input . 58
6.7.2 Useful efficiency at part load . 58
6.8 Criteria for condensation in the flue . 59
6.9 Resistance of the materials to pressure . 59
6.9.1 General . 59
6.9.2 Boilers of sheet steel or non-ferrous metals . 59
6.9.3 Boilers of cast iron and cast materials . 59
6.10 Hydraulic resistance . 60
6.11 Condensation in the boiler . 60
6.12 Combustion air and flue dampers . 60
7 Test methods . 60
7.1 General . 60
7.1.1 Characteristics of the reference and limit gases . 60
7.1.2 General test conditions . 66
7.2 Soundness . 70
7.2.1 Soundness of the gas circuit . 70
7.2.2 Soundness of the combustion circuit . 70
7.2.3 Soundness of the water circuit . 71
7.3 Nominal, maximum and minimum heat inputs, and nominal output . 71
7.3.1 Nominal heat input or maximum and minimum heat inputs . 71
7.3.2 Adjustment of the heat input by the downstream pressure . 72
7.3.3 Ignition rate . 73
7.3.4 Nominal output . 73
7.3.5 Gas pressure regulator. 73
7.4 Safety of operation . 73
7.4.1 Limiting temperatures . 73
7.4.2 Ignition - Cross-lighting - Flame stability . 75
7.4.3 Pre-purge . 78
7.4.4 Functioning of a permanent ignition burner when the fan stops during standby
time . 79
7.5 Adjusting, control and safety devices . 79
7.5.1 General . 79
7.5.2 Ignition devices . 79
7.5.3 Flame supervision devices . 80
7.5.4 Ignition burner and ignition rates . 82
7.5.5 Air proving . 82
7.5.6 Gas pressure switches . 84
7.5.7 Control thermostat and safety temperature limiter . 84
7.5.8 Condensate discharge blockage . 86
7.6 Combustion . 86
7.6.1 Carbon Monoxide . 86
7.6.2 Limit conditions . 87
7.6.3 Special conditions . 88
7.6.4 Other pollutants . 90
7.7 Useful efficiencies . 93
7.7.1 Useful efficiency at the nominal heat input . 93
7.7.2 Useful efficiency at part load . 94
7.8 Criteria for condensation in the flue . 101
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kSIST FprEN 15420:2010
FprEN 15420:2010 (E)
7.8.1 Determination of flue losses . 101
7.8.2 Minimum temperature of the combustion products . 102
7.9 Resistance of materials to pressure . 102
7.9.1 General . 102
7.9.2 Boilers of sheet steel or non-ferrous metals . 102
7.9.3 Boilers of cast iron and cast materials . 103
7.10 Hydraulic resistance . 103
7.11 Condensation in the boiler . 103
7.12 Combustion air and flue dampers . 103
8 Marking and instructions . 104
8.1 Marking of the boiler . 104
8.1.1 General . 104
8.1.2 Data plate . 104
8.1.3 Supplementary marking . 105
8.1.4 Packaging . 108
8.1.5 Warnings on the boiler and on the packaging . 108
8.1.6 Other information . 108
8.2 Instructions . 108
8.2.1 Technical instructions for the installer . 108
8.2.2 For installation of the combustion circuit . 109
8.2.3 Use and maintenance instructions for the user . 110
8.2.4 Conversion instructions . 111
8.3 Presentation . 111
Annex A (informative) National situations . 127
A.1 Categories marketed in the various countries . 127
A.2 Special categories marketed nationally or locally . 129
A.3 Gas groups distributed locally . 129
A.4 Boiler supply pressures .
...
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