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CEN

EN 303-7:2006

(Main)

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

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
90/396/EEC - Appliances burning gaseous fuels
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
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

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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



EN 303-7:2006 (E) 2 Contents Page Foreword.3 1 Scope.4 2 Normative references.4 3 Terms and definitions.5 4 Constructional and operational requirements.9 4.1 General principles.9 4.2 Operational requirements.9 5 Test methods.18 5.1 General principles.18 5.2 External tightness of the gas line.21 5.3 Heat input rates.21 5.4 Gas pressure governor.22 5.5 Safety of operation.22 5.6 Control and safety equipments.25 5.7 Combustion.26 5.8 Useful efficiencies.
...

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This document specifies the requirements and tests methods concerning the construction, safety, fitness for purpose, and rational use of energy, as well as the classification and marking of hybrid units.
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Replace the second paragraph by the following text :
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Replace the 2nd dash of the third paragraph by the following text :
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This European Standard specifies the requirements and test methods for the construction, the safety and the rational energy usage of an assembly made up of a boiler body complying with EN 303- 11) and a forced draught gas burner complying with EN 676, using combustible gases, hereafter referred to as a "boiler".  This European Standard applies to a boiler:  - with a nominal output not exceeding 1 000 kW.  This European Standard does not contain all the necessary requirements for:  - assemblies designed as units;  - condensing boilers and low temperature boilers;  - boilers intended to be installed in the open;  - boilers permanently fitted with more than one flue outlet;  - boilers fitted with a draught diverter;  -  boilers intended to be connected to a common flue having mechanical    extraction.  This European Standard does not apply to living-space dedicated boilers   If the boiler body has already been tested with a liquid fuel burner, in accordance with EN 303-1, EN 303-2 and EN 304, only the tests described in annex G need to be performed.  In the case of a range of boilers, see annex F.  This European Standard does not contain all the necessary requirements for low temperature boilers. Nevertheless, the testing methods defined by this European Standard for the determination of useful efficiencies can be used for low temperature boilers, after being adapted in accordance with annex H.  This European Standard only covers type testing.

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aa)   appliances that are intended to be connected to gas grids where the quality of the distributed gas is likely to vary to a large extent over the lifetime of the appliance (see Annex AB);
ab)   appliances using flue dampers;
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ad)   appliances of the types A, B14, B¬2, B3, B4, B5 and C;
ae)   appliances intended to be connected to a (common) flue having mechanical extraction;
af)   appliances with gas/air ratio control;
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Amendment for the addition of ecodesign requirements (Regulation No 813/2013)
and energy labelling requirements (Regulation No 811/2013)
This European Standard specifies the common requirements and test methods concerning, in particular the construction, safety, fitness for purpose, and rational use of energy, as well as the classification, marking and energy labelling 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 European Standard is to be used in conjunction with the specific Parts 2 (Part 2-1 and following ones).
This European Standard applies to boilers of types B and C, according to CEN/TR 1749:2014:
a)   that use one or more combustible gases of the three gas families at the pressures stated in EN 437;
b)   where the temperature of the heat transfer fluid does not exceed 105 °C during normal operation;
c)   where the maximum operating pressure in the water circuit does not exceed 6 bar;
d)   which can give rise to condensation under certain circumstances;
e)   which are declared in the installation instructions to be either a “condensing” boiler or a "low temperature boiler" or a “standard boiler”. If no declaration is given the boiler is to be considered a “standard boiler”
f)   which are intended to be installed inside a building or in a partially protected place;
g)   which are intended to produce hot water either by the instantaneous or storage principle, the whole being marketed as a single unit.
This European Standard applies to boilers designed for sealed water systems or for open water systems.
This general standard and the specific standards (see Part 2) provide requirements for boilers with known constructions. For boilers with any alternative constructions, which might not fully be covered by this standard or a specific standard, the risk associated with this alternative construction will need to be assessed.
An example of an assessment methodology, based upon risk assessment, is given in Clause 11.
This European Standard is not intended to cover appliances intended for connection to gas grids where the quality of the distributed gas is likely to vary to a large extent over the lifetime of the appliance.

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This document is applicable to wall mounted and flush mounted room temperature sensors.
The following aspects are not covered by this document:
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-   extract air temperature sensors.
NOTE   The measured value available at the output of the sensor is influenced by the place where the sensor device is located and factors such as air velocity, wall temperature, self/waste heating of the device and the air temperature. The perceived temperature, which is important for the well-being of a person, depends among other factors on air temperature, temperature of the surrounding walls and air flow rate as indicated in EN ISO 7730.
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