EN 303-2:2017

Heating boilers - Part 2: Heating boilers with forced draught burners - Special requirements for boilers with atomizing oil burners

This European Standard is applicable to boilers used for central heating in accordance with prEN 303 1:2016 up to a nominal heat output of 1 000 kW and EN 303 4 up to a nominal heat output of 70 kW with forced draught burners in accordance with EN 267 that are designed for operating with liquid fuels.
The performance requirements of this standard apply to type testing to heating boilers (standard, low temperature and condensing boilers) which are tested on a test rig in accordance with the test code given in EN 304.
This standard applies also to room sealed boilers as defined in EN 15035 regarding efficiency and emissions.
This standard can also be used as the basis for evaluation of boiler-/burner units.

Heizkessel - Teil 2: Heizkessel mit Gebläsebrennern - Spezielle Anforderungen an Heizkessel mit Ölzerstäubungsbrennern

Diese Europäische Norm gilt für Heizkessel für Zentralheizungen nach prEN 303-1:2016 bis zu einer Nennwärmeleistung von 1 000 kW und EN 303-4 bis zu einer Nennwärmeleistung von 70 kW mit Gebläsebrennern nach EN 267, die für den Betrieb mit flüssigen Brennstoffen konzipiert wurden.
Die Leistungsanforderungen dieser Norm gelten für die Typ-Prüfung von Heizkesseln (Standard-, Niedertemperatur- und Brennwertkessel), die auf einem Prüfstand geprüft werden, in Übereinstimmung mit den in prEN 304 beschriebenen Prüfregeln.
Die Norm gilt auch für raumluftunabhängige Kessel  gemäß der Definition in EN 15035 was Wirkungsgrad und Emissionen betrifft.
Diese Norm kann auch als Grundlage für die Bewertung von Heizkessel-/Brennereinheiten dienen.

Chaudières de chauffage - Partie 2: Chaudières avec brûleurs à air soufflé - Prescriptions spéciales pour chaudières avec brûleurs fioul à pulvérisation

La présente Norme européenne s'applique aux chaudières de chauffage central conformes au prEN 303-1:2016 jusqu'à une puissance thermique nominale de 1 000 kW et à l'EN 303-4 jusqu'à une puissance thermique nominale de 70 kW, pourvues de brûleurs à air soufflé conformes à l'EN 267 et conçues pour fonctionner avec des combustibles liquides.
Les exigences de performance de la présente norme s'appliquent aux essais de type de chaudières de chauffage (chaudières standard, à basse température et à condensation) soumises à essai sur un banc d'essai conformément aux règles d'essai du prEN 304:2016.
La présente norme s'applique également aux chaudières étanches définies dans l'EN 15035, pour ce qui concerne le rendement et les émissions.
La présente norme peut aussi servir de base pour l'évaluation des assemblages de chaudière/brûleur.

Kotli za gretje - 2. del: Kotli z ventilatorskimi gorilniki - Posebne zahteve za kotle z razprševalnimi oljnimi gorilniki

Ta standard se uporablja za kotle za gretje v skladu s standardom EN 303-1 do nazivne toplotne moči 1000 kW in standardom EN 303-4 do nazivne toplotne moči 70 kW z razprševalnimi oljnimi gorilniki v skladu s standardom EN 267, ki so zasnovani za delovanje s tekočimi gorivi. Ta evropski standard se uporablja za nizkotemperaturne kotle v skladu s standardom EN 303-1/A1 in določa z gretjem povezane zahteve, potrebne za tekoča goriva za nizkotemperaturne kotle in potreben dodatni preskus trajanja za naftne nizkotemperaturne kotle. Zahteve glede zmogljivosti v tem standardu veljajo za tipsko preskušanje za ogrevalne kotle (standardne, nizkotemperaturne in kondenzacijske kotle), ki se preskušajo na preskusni napravi v skladu s preskusno kodo, navedeno v standardu EN 304.  Ta standard se glede učinkovitosti in emisij uporablja tudi za kotle za uporabo v zaprtih prostorih, kot je opredeljeno v standardu EN 15035. Ta standard določa potrebne tehnične zahteve glede ogrevanja za kotle za gretje s tekočimi gorivi. OPOMBA: Ta standard je mogoče uporabljati tudi kot osnovo za vrednotenje enot vodnih kotlov/gorilnikov.

General Information

• Status: Published
• Publication Date: 15-Aug-2017
• Withdrawal Date: 27-Feb-2018
• ICS: 91.140.10 - Central heating systems
• Technical Committee: CEN/TC 57 - Central heating boilers
• Drafting Committee: CEN/TC 57/WG 2 - Test method for the determination of efficiency at a partial load of 30%
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 16-Aug-2017
• Due Date: 29-Sep-2017
• Completion Date: 16-Aug-2017
• Directive: 811/2013 - Commission Delegated Regulation (EU) No 811/2013 of 18 February 2013 supplementing Directive 2010/30/EU of the European Parliament and of the Council with regard to the energy labelling of space heaters, combination heaters, packages of space heater, temperature control and solar device and packages of combination heater, temperature control and solar device
• Directive: 813/2013 - Commission Regulation (EU) No 813/2013 of 2 August 2013 implementing Directive 2009/125/EC of the European Parliament and of the Council with regard to ecodesign requirements for space heaters and combination heaters
• Mandate: M/495 - Standardisation mandate to CEN, CENELEC and ETSI under Directive 2009/125/EC relating to harmonised standards in the field of Ecodesign
• Mandate: M/535 - [C(2016)2626) Standardisation request to the European standardisation organisations to draft harmonised European standards pursuant to Article 10(1) of Regulation (EU) No 1025/2012 of the European Parliament and of the Council in support of implementation of Commission Regulation (EU) No 813/2013 of 2 August 2013 implementing Directive 2009/125/EC of the European Parliament and of the Council with regard to eco-design requirements for space heaters and combination heaters and Commission Delegated Regulation (EU) No 811/2013 of 18 February 2013 supplementing Directive 2010/30/EU of the European Parliament and of the Council with regard to the energy labelling of space heaters, combination heaters, packages of space heaters, temperature control and solar device and packages of combination heater, temperature control and solar device
• Ref Project: SIST EN 303-2:2017 - Heating boilers - Part 2: Heating boilers with forced draught burners - Special requirements for boilers with atomizing oil burners

Relations

• Replaces: EN 15034:2006/AC:2008 - Heating boilers - Condensing heating boilers for fuel oil
• Effective Date: 08-Jun-2022
• Replaces: EN 15034:2006 - Heating boilers - Condensing heating boilers for fuel oil
• Effective Date: 08-Jun-2022
• Replaces: EN 303-2:1998 - Heating boilers - Part 2: Heating boilers with forced draught burners - Special requirements for boilers with atomizing oil burners
• Effective Date: 23-Aug-2017
• Replaces: EN 303-2:1998/A1:2003 - Heating boilers - Part 2: Heating boilers with forced draught burners - Special requirements for boilers with atomizing oil burners
• Effective Date: 23-Aug-2017
• Revised: prEN 303-2 - Heating boilers - Part 2: Heating boilers with forced draught burners - Special requirements for boilers with atomizing oil burners
• Effective Date: 19-Jan-2023

Standards Content (Sample)

SLOVENSKI STANDARD
01-december-2017
1DGRPHãþD
SIST EN 15034:2007
SIST EN 15034:2007/AC:2008
SIST EN 303-2:1999
SIST EN 303-2:1999/A1:2004
Kotli za gretje - 2. del: Kotli z ventilatorskimi gorilniki - Posebne zahteve za kotle z
razprševalnimi oljnimi gorilniki
Heating boilers - Part 2: Heating boilers with forced draught burners - Special
requirements for boilers with atomizing oil burners
Heizkessel - Teil 2: Heizkessel mit Gebläsebrenner; Spezielle Anforderungen an
Heizkessel mit Ölzerstäubungsbrennern
Chaudières de chauffage - Partie 2 : Chaudières avec brûleurs à air soufflé, prescriptions
spéciales pour chaudières avec brûleurs fioul à pulvérisation
Ta slovenski standard je istoveten z: EN 303-2:2017
ICS:
27.060.10 *RULOQLNLQDWHNRþHLQWUGR Liquid and solid fuel burners
JRULYR
91.140.10 Sistemi centralnega Central heating systems
ogrevanja
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 303-2
EUROPEAN STANDARD
NORME EUROPÉENNE
August 2017
EUROPÄISCHE NORM
ICS 91.140.10 Supersedes EN 15034:2006, EN 303-2:1998
English Version
Heating boilers - Part 2: Heating boilers with forced
draught burners - Special requirements for boilers with
atomizing oil burners
Chaudières de chauffage - Partie 2: Chaudières avec Heizkessel - Teil 2: Heizkessel mit Gebläsebrennern -
brûleurs à air soufflé - Prescriptions spéciales pour Spezielle Anforderungen an Heizkessel mit
chaudières avec brûleurs fioul à pulvérisation Ölzerstäubungsbrennern
This European Standard was approved by CEN on 26 June 2017.

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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, 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: Avenue Marnix 17, B-1000 Brussels
© 2017 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 303-2:2017 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
3.1 General terms and definitions . 5
3.2 Terms and definitions relevant to eco-design and labelling regulations terms . 6
4 Performance requirements . 6
4.1 General . 6
4.2 Boiler efficiency . 6
4.2.1 Air ratio for efficiency measurement . 6
4.2.2 Boilers of heat output ≤ 70 kW . 6
4.2.3 Boilers of heat output > 70 kW and ≤ 400 kW . 7
4.2.4 Boilers of heat output > 400 kW and ≤ 1000 kW . 7
4.3 Draught requirements and gas side resistance. 7
4.4 Emission values . 7
4.5 Standby heat loss . 7
4.6 Auxiliary electricity consumption . 8
4.7 Sound power level . 8
4.8 Samples for testing . 8
5 Material performance . 8
5.1 General . 8
5.2 Test specimen and test duration . 8
5.3 Adjustment values for the test. 8
Annex A (normative) Assembly criteria . 11
Annex B (informative) Example of test evaluation for a 3-months duration test . 13
Annex ZA (informative) Relationship between this European Standard and the ecodesign
requirements of Commission Regulation (EU) No [813/2013] aimed to be covered . 15
Bibliography . 16

European foreword
This document (EN 303-2:2017) has been prepared by Technical Committee CEN/TC 57 “Central
heating boilers”, the secretariat of which is held by DIN.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by February 2018, and conflicting national standards
shall be withdrawn at the latest by February 2018.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association, and supports essential requirements of Regulation (EU) No
813/2013.
For relationship with EU Regulation(s), see informative Annex ZA, which is an integral part of this
document.
This document supersedes EN 303-2:1998 and EN 15034:2006.
The main technical changes compared to EN 303-2:1998 are the following:
a) Complete new structure;
b) Technical changes related to ecodesign and energy labelling:
1) 4.2, boiler efficiency and seasonal space heating efficiency;
2) 4.4, limitation of the emissions;
3) 4.5, standby heat loss;
4) 4.6, auxiliary electrical consumption;
5) 4.7, sound power level.
c) Additions related to ecodesign and energy labelling:
1) Annex ZA.
The following structure is intended for the standards for heating boilers:
— EN 303-1, Heating boilers — Part 1: Heating boilers with forced draught burners — Terminology,
general requirements, testing and marking
— EN 303-2, Heating boilers — Part 2: Heating boilers with forced draught burners — Special
requirements for boilers with atomizing oil burners
— EN 303-3, Heating boilers — Part 3: Gas fired central heating boilers — Assembly comprising a boiler
body and a forced draught burner
— EN 303-4, Heating boilers — Part 4: Heating boilers with forced draught burners — Special
requirements for boilers with forced draught oil burners with outputs up to 70 kW and a maximum
operating pressure of 3 bar — Terminology, special requirements, testing and marking
— EN 303-5, Heating boilers — Part 5: Heating boilers for solid fuels, manually and automatically
stoked, — nominal heat output of up to 500 kW - Terminology, requirements, testing and marking
— EN 304, Heating boilers — Test code for heating boilers for atomizing oil burners
— EN 303-6, Heating boilers - Part 6: Heating boilers with forced draught burners; specific
requirements for the domestic hot water operation of combination boilers with atomizing oil burners
of nominal heat input not exceeding 70 kW
According to the CEN-CENELEC Internal Regulations, the national standards organisations of the
following countries are bound to implement this European Standard: 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, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
1 Scope
This European Standard is applicable to boilers used for central heating in accordance with
EN 303-1:2017 up to a nominal heat output of 1 000 kW and EN 303-4 up to a nominal heat output of
70 kW with forced draught burners in accordance with EN 267 that are designed for operating with
liquid fuels.
The performance requirements of this standard apply to type testing to heating boilers (standard, low
temperature and condensing boilers) which are tested on a test rig in accordance with the test code
given in EN 304.
This standard applies also to room sealed boilers as defined in EN 15035 regarding efficiency and
emissions.
This standard can also be used as the basis for evaluation of boiler-/burner units.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
EN 267:2009+A1:2011, Automatic forced draught burners for liquid fuels
EN 303-1:2017, Heating boilers - Part 1: Heating boilers with forced draught burners - Terminology,
general requirements, testing and marking
EN 303-4:1999, Heating boilers - Part 4: Heating boilers with forced draught burners - Special
requirements for boilers with forced draught oil burners with outputs up to 70 kW and a maximum
operating pressure of 3 bar - Terminology, special requirements, testing and marking
EN 304:2017, Heating boilers - Test code for heating boilers for atomizing oil burners
EN 15035:2006, Heating boilers - Special requirements for oil fired room sealed units up to 70 kW
EN 15036-1:2006, Heating boilers - Test regulations for airborne noise emissions from heat generators -
Part 1: Airborne noise emissions from heat generators
EN 15316-4-1:2017, Energy performance of buildings - Method for calculation of system energy
requirements and system efficiencies - Part 4-1: Space heating and DHW generation systems, combustion
systems (boilers, biomass), Module M3-8-1, M8-8-1
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 303-1:2017 and the following
apply.
3.1 General terms and definitions
3.1.1
range rated boiler
appliance where the heat output is fixed in a given range
3.1.2
modulating boiler
appliance where the heat output is varying in a given range automatically
3.1.3
standby heat loss
P
stby
the heat loss of a boiler space heater, boiler combination heater in operating mode without heat
demand, expressed in kW
3.1.4
combination boiler (combi boiler)
boiler designed both for central heating and for the production of domestic hot water
Note 1 to entry: Depending on its type of domestic hot water production, the combination boiler is classified in
accordance with the manufacturer's declaration as instantaneous type or storage type.
3.2 Terms and definitions relevant to eco-design and labelling regulations terms
3.2.1
sound power level
L
WA
A-weighted sound power level, indoors, expressed in dB(A)
3.2.2
package
unit of boilers or combination boilers, temperature control and/or solar devices means a package
offered to the end-user containing one or more boilers or combination boilers combined with one or
more temperature controls and/or one or more solar devices
Note 1 to entry: Definition based on Labelling Regulation 811/2013 Article 2 - (19) and (20).
4 Performance requirements
4.1 General
All the following performance tests are carried out using an oil forced draught burner in accordance
with EN 267.
Multi-stage or modulating burners shall operate within the output range of the boiler.
If
...