EN 303-7:2006

Heating boilers - Part 7: Gas-fired central heating boilers equipped with a forced draught burner of nominal heat output not exceeding 1 000 kW

This European Standard specifies the requirements and test methods for the construction, the safety and the rational energy usage for gas-fired central heating boilers equipped with a forced draught burner. These boilers are formed of the assembly of a boiler body and a forced draught gas burner achieved on the production site of the manufacturer, the whole being designed and marketed as a complete boiler. The boiler body shall be in accordance with EN 303-1. The construction of the forced draught gas burner shall be in accordance with EN 676.

Heizkessel - Teil 7 : Zentralheizkessel für gasförmige Brennstoffe mit einem Gebläsebrenner mit einer Nennwärmeleistung kleiner als oder gleich 1 000 kW

Diese Europäische Norm legt die Anforderungen und Prüfungen für die Konstruktion, die Sicherheit und den wirtschaftlichen Energieeinsatz von Standard- und Niedertemperatur-Zentralheizkesseln für gasförmige Brennstoffe fest, die mit einem Gebläsebrenner ausgerüstet sind.
Diese Heizungskessel werden in der Fertigung des Herstellers aus dem Zusammenbau eines Kesselkörpers und eines Gasgebläsebrenners gebildet, die als zusammengehörende Einheit angeboten werden.
Die vorliegende Norm behandelt nicht den Fall eines Zusammenbaus aus Kesselkörper und Gasgebläse¬brenner, die getrennt voneinander angeboten werden. In diesem Fall gilt die EN 303-3.
Diese Europäische Norm ist für Kessel vom Typ B23 mit einer Nennwärmeleistung bis 1000 kW und einer normalen Betriebstemperatur die 105 °C und einen wasserseitigen Maximaldruck von nicht über 8 bar anzuwenden.
Die vorliegende Norm beinhaltet nicht alle notwendigen Anforderungen für die:
   Kessel mit Brennwertnutzung und Kombikessel;
   Kessel, die zur Installation im Freien vorgesehen sind;
   Kessel, die permanent mit mehr als einem Abgasstutzen ausgerüstet sind;
   Kessel, die für den Anschluss an eine gemeinsame Abgasanlage mit mechanischer Absaugung vorgesehen sind;
   Kessel, die mit mehreren Feuerräumen ausgerüstet sind.
Die vorliegende Norm gilt nicht für Kessel zur Aufstellung in Wohnräumen (siehe 3.6).
Diese Norm umfasst ausschließlich die Typprüfung.

Chaudière de chauffage - Partie 7 : Chaudières de chauffage central équipées d'un brûleur à air soufflé utilisant les combustibles gazeux de puissance utile inférieure ou égale à 1 000 kW

La présente norme européenne spécifie les exigences et les méthodes d'essais relatives à la construction, la sécurité et l'utilisation rationnelle de l'énergie d'un assemblage ou d'une unité constitué d'un corps de chaudière conforme à la norme EN 303-1 et d'un brûleur à air soufflé utilisant les combustibles gazeux. Dans le cas d'un assemblage composé d'un corps de chaudière et d'un brûleur à gaz à air soufflé conçus séparément, dénommé ci-après "chaudière", le brûleur à gaz à air soufflé doit être conforme à l'EN 676.

Kotli za gretje - 7. del: Plinski kotli za centralno gretje z ventilatorskimi gorilniki z imensko grelno močjo do vključno 1000 kW

General Information

• Status: Published
• Publication Date: 10-Oct-2006
• Withdrawal Date: 29-Apr-2007
• ICS: 91.140.10 - Central heating systems
• Technical Committee: CEN/TC 109 - Central heating boilers using gaseous fuels
• Drafting Committee: CEN/TC 109 - Central heating boilers using gaseous fuels
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 11-Oct-2006
• Completion Date: 11-Oct-2006
• Directive: 2009/142/EC - DIRECTIVE 2009/142/EC OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL of 30 November 2009 relating to appliances burning gaseous fuels
• Directive: 90/396/EEC - Appliances burning gaseous fuels
• Directive: 92/42/EEC - Efficiency requirements for new hot-water boilers fired with liquid or gaseous fuels
• Mandate: M/066 - Standardization mandate to CEN concerning Efficiency requirements for boilers
• Mandate: M/BC/CEN/89/6 - Standardization request to CEN concerning appliances burning gaseous fuels
• Ref Project: SIST EN 303-7:2007 - Heating boilers - Part 7: Gas-fired central heating boilers equipped with a forced draught burner of nominal heat output not exceeding 1 000 kW

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Heating boilers - Part 7: Gas-fired central heating boilers equipped with a forced draught burner of nominal heat output not exceeding 1 000 kWChaudiere de chauffage - Partie 7 : Chaudieres de chauffage central équipées d'un bruleur a air soufflé utilisant les combustibles gazeux de puissance utile inférieure ou égale a 1 000 kWHeizkessel - Teil 7 : Zentralheizkessel für gasförmige Brennstoffe mit einer Gebläsebrenner mit einer Nennwärmeleistung kleiner als oder gleich 1 000 kWTa slovenski standard je istoveten z:EN 303-7:2006SIST EN 303-7:2007en,fr,de91.140.10ICS:SLOVENSKI
STANDARDSIST EN 303-7:200701-februar-2007

EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 303-7October 2006ICS 91.140.10 English VersionHeating boilers - Part 7: Gas-fired central heating boilersequipped with a forced draught burner of nominal heat outputnot exceeding 1 000 kWChaudière de chauffage - Partie 7 : Chaudières dechauffage central équipées d'un brûleur à air souffléutilisant les combustibles gazeux de puissance utileinférieure ou égale à 1 000 kWHeizkessel - Teil 7 : Zentralheizkessel für gasförmigeBrennstoffe mit einer Gebläsebrenner mit einerNennwärmeleistung kleiner als oder gleich 1 000 kWThis European Standard was approved by CEN on 14 December 2005.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Central Secretariat or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, 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 STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2006 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 303-7:2006: E

Diameters of combustion products evacuation ducts marketed in the various countries.49 Annex B (informative)
Practical method of calibrating the test rig to enable determination of heat loss Dp.50 Annex C (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 (see 5.8.2.3.1.3).51 Annex D (informative)
Determination of the operating time at full rate prior to modulation.52 Annex E (normative)
Determination of the combustion characteristics – Carbon monoxide and nitrogen oxides.53 Annex F (normative)
Case of a forced draught burner complying with EN 676.55 Annex G (informative)
Main symbols and abbreviations used.56 Annex H (informative)
A-deviations.57 Annex ZA (informative)
Clauses of this European Standard addressing essential requirements or
other provisions of EU Directives.58 Bibliography.61

1 Scope This European Standard specifies the requirements and test methods for the construction, the safety and the rational energy usage for gas-fired standard and low temperature central heating boilers equipped with a forced draught burner.
These boilers comprise a boiler body and a forced draught gas burner brought together at the producer's assembly facility, the whole being designed and marketed as a complete boiler. This standard does not apply to the case of the assembly of a boiler body and a forced draught gas burner designed and marketed separately. In this case, EN 303-3 applies. This European Standard applies to type B23 boilers with a nominal heat output not exceeding 1000 kW with a water temperature at normal operation not exceeding 105 °C and with a maximum water-side operating pressure not exceeding 8 bar. This European Standard does not contain all the necessary requirements for:  condensing boilers and combination boilers;  boilers intended to be installed in the open;  boilers permanently fitted with more than one flue outlet;  boilers intended to be connected to a common flue having mechanical extraction;  boilers equipped with several combustion chambers. This European Standard does not apply to living-space dedicated boilers (see 3.6). This European Standard only covers type testing. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 303-1:1999, Heating boilers  Part 1: Heating boilers with forced draught burners  Terminology, general requirements, testing and marking EN 437, Test gases  Test pressures  Appliance categories EN 676, Automatic forced draught burners for gaseous fuels EN 60335-1:2002, Household and similar electrical appliances - Safety  Part 1: General requirements
(IEC 60335-1:2001, modified) EN ISO 3166-1, Codes for the representation of name of countries and their subdivisions  Part 1: Country codes (ISO 3166-1:1997) CEN/TR 1749, European scheme for the classification of gas appliances according to the method of evacuation of the combustion products (types)

Qn heat input stated by the manufacturer 3.3 Outputs 3.3.1 useful output P quantity of heat transmitted to the heat carrier in unit time NOTE Outputs are expressed in kilowatts (kW) 3.3.2 nominal output Pn useful output stated by the manufacturer 3.4 useful efficiency
ηηηηu ratio of the useful output to the heat input NOTE the useful efficiency is expressed in percent (%). 3.5 nominal voltage voltage or range of voltages stated by the manufacturer, at which the boiler can operate normally
1) Boilers fitted with a range-rating device operate at a nominal heat input between the maximum and minimum adjustable heat inputs. Modulating boilers operate between the nominal heat input and the minimum controlled heat input. The maximum heat input corresponds to the nominal output of the boiler in accordance with EN 303-1.

(CEN/TR 1749) 3.9.1 type B appliance intended to be connected to a flue that evacuates the products of combustion to the outside of the room containing the appliance. The combustion air is drawn directly from the room 3.9.2 type B2 type B appliance without draught diverter 3.9.3 type B23 type B2 appliance incorporating a fan upstream of the combustion chamber/heat exchanger 3.10 forced draught burner burner in which the combustion air is introduced by means of a fan 3.11 automatic forced draught burner forced draught burner that is fitted with automatic ignition, flame monitoring and burner control devices. Ignition, flame monitoring and the on/off switching of the burner occur automatically. The heat input of the burner can be adjusted during operation either automatically or manually 3.12 total pre-mixed burner burner in which at least all the air theoretically required for complete combustion of the gas is mixed with the gas upstream of the mixture outlet ports 3.13 nozzle mixed burner burner i
...