EN 15420:2010
(Main)Gas-fired central heating boilers - Type C boilers of nominal heat input exceeding 70 kW, but not exceeding 1 000 kW
General Information
- Abstract
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.
- Status
- Withdrawn
- Publication Date
- 30-Nov-2010
- Withdrawal Date
- 23-Oct-2012
- Technical Committee
- CEN/TC 109 - Central heating boilers using gaseous fuels
- Current Stage
- 9960 - Withdrawal effective - Withdrawal
- Start Date
- 24-Oct-2012
- Completion Date
- 24-Oct-2012
- Directive
- Not Harmonized2009/142/EC - Appliances burning gaseous fuels
Not Harmonized90/396/EEC - Appliances burning gaseous fuels
Relations
- Effective Date
- 31-Oct-2012
- Effective Date
- 28-Jan-2026
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Frequently Asked Questions
EN 15420:2010 is a standard published by the European Committee for Standardization (CEN). Its full title is "Gas-fired central heating boilers - Type C boilers of nominal heat input exceeding 70 kW, but not exceeding 1 000 kW". This standard covers: 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.
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.
EN 15420:2010 is classified under the following ICS (International Classification for Standards) categories: 91.140.10 - Central heating systems. The ICS classification helps identify the subject area and facilitates finding related standards.
EN 15420:2010 has the following relationships with other standards: It is inter standard links to EN 15502-2-1:2012, EN ISO 19125-2:2006. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN 15420:2010 is associated with the following European legislation: EU Directives/Regulations: 2009/142/EC, 90/396/EEC; Standardization Mandates: M/BC/CEN/89/6. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.
EN 15420:2010 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
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
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
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 . 147H.1 General . 147H.2 Boilers with permanent ignition burner or alternating ignition burner or leakage control device or with pre-purge . 147H.2.1 Heat inputs up to 150 kW . 147H.2.2 Heat inputs up to 300 kW . 148H.3 Boilers without permanent ignition burner or alternating ignition burner, without leakage control device and without pre-purge . 149H.3.1 Heat inputs up to 150 kW . 149H.3.2 Heat inputs up to 300 kW . 150H.4 Heat Inputs exceeding 300 kW but not exceeding 1 000 kW . 151H.4.1 Boilers with permanent ignition burner or alternating ignition burner or leakage control device or with pre-purge . 151H.4.2 Boilers without permanent ignition burner or alternating ignition burner, without a leakage control device and without pre-purge . 152Annex I (informative)
Determination of the heat losses from the test rig of the indirect method and the contributions of the circulating pump of the test rig . 153SIST EN 15420:2011
Means of determining the ignition time at full rate . 154Annex K (informative)
Example of the calculation of the NOx weighting factors for a boiler
with several rates . 155K.1 Apportioning of Qpi = 20 % . 155K.2 Apportioning of Qpi = 40 % . 155K.3 Apportioning of Qpi = 60 % . 155K.4 Apportioning of Qpi = 70 % . 156K.5 Total apportioning . 156Annex L (informative)
Calculation of conversions of NOx . 157Annex M (normative)
Test apparatus for type C2 boilers (see 7.4.2.3.3) . 158Annex N (informative)
Requirements and test methods for separate air supply and combustion products evacuation ducts of type C6 boilers) . 159N.1 Requirements . 159N.1.1 Pressure losses . 159N.1.2 Pressure loss under the influence of wind . 159N.1.3 Suction under the influence of wind . 159N.1.4 Recirculation of the combustion products. 159N.2 Test methods . 160N.2.1 Pressure loss in still air . 160N.2.2 Pressure loss under the influence of wind . 160N.2.3 Suction under the influence of wind . 160N.2.4 Recirculation of the combustion products. 161N.2.5 Wind test conditions . 161Annex O (informative)
Use of test gases . 164O.1 Boilers within a range . 164O.2 Guidance on the use of test gases . 164Annex ZA (informative)
Clauses of this European Standard addressing essential requirements or provisions of EU Directives . 165Bibliography . 168 SIST EN 15420:2011
70 kW EN 1057, Copper and copper alloys — Seamless, round copper tubes for water and gas in sanitary and heating applications EN 1092-1, Flanges and their joints — Circular flanges for pipes, valves, fittings and accessories, PN designated — Part 1: Steel flanges EN 1092-2, Flanges and their joints — Circular flanges for pipes, valves, fittings and accessories, PN designated — Part 2: Cast iron flanges EN 1092-3, Flanges and their joints — Circular flanges for pipes, valves, fittings and accessories, PN designated — Part 3: Copper alloy flanges EN 1561, Founding — Grey cast irons EN 1643, Valve proving systems for automatic shut off valves for gas burners and gas appliances EN 1854, Pressure sensing devices for gas burners and gas burning appliances EN 10029, Hot rolled steel plates 3 mm thick or above — Tolerances on dimensions, shape and mass EN 12067-1, Gas/air ratio controls for gas burners and gas burning appliances — Part 1: Pneumatic types EN 12067-2, Gas/air ratio controls for gas burners and gas burning appliances — Part 2: Electronic types EN 50165, Electrical equipment of non-electric appliances for household and similar purposes — Safety requirements EN 60335-1:1992, Safety of household and similar electrical appliances — Part 1: General requirements (IEC 60335-1:2001, modified) EN 60529, Degrees of protection provided by enclosures (IP code) (IEC 60529:1989) EN 60730-2-9, Automatic electrical controls for household and similar use — Part 2-9: Particular requirements for temperature sensing controls (IEC 60730-2-9:2000, modified) EN ISO 228-1, Pipe threads where pressure-tight joints are not made on the threads — Part 1: Dimensions, tolerances and designation (ISO 228-1:2000) EN ISO 3166-1, Codes for the representation of names of countries and their subdivisions — Part 1: Country codes (ISO 3166-1:2006) EN ISO 4063, Welding and allied processes — Nomenclature of processes and reference numbers (ISO 4063:2009) SIST EN 15420:2011
d 3.1.6 calorific value quantity of heat produced by the complete combustion, at a constant pressure equal to 1 013,25 mbar, of a unit volume or mass of gas, the constituents of the combustible mixture being taken at reference conditions and the products of combustion being brought back to the same conditions NOTE
A distinction is made between: a) The gross calorific value: the water produced by combustion is assumed to be condensed
Symbol:
Hs b) The net calorific value: the water produced by combustion is assumed to be in the vapour state
Hi c) Unit: 1) either in megajoules per cubic metre (MJ/m3) of dry gas under the reference conditions; or in megajoules per kilogram (MJ/kg) of dry gas. 3.1.7 Wobbe index ratio of the calorific value of a gas per unit volume and the square root of its relative density under the same reference conditions, that is said to be gross or net according to whether the calorific value used is the gross or net calorific value Symbols: gross Wobbe index: Ws
net Wobbe index: Wi NOTE The Wobbe indices are expressed:
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