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SLOVENSKI STANDARD
01-februar-2023
Nadomešča:
SIST EN 303-5:2021
Kotli za gretje - 5. del: Kotli na trdna goriva z ročnim in avtomatskim polnjenjem z
nazivno močjo do 500 kW - Terminologija, zahteve, preskušanje in označevanje
(vključuje dopolnilo A1)
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
Heizkessel - Teil 5: Heizkessel für feste Brennstoffe, manuell und automatisch
beschickte Feuerungen, Nennwärmeleistung bis 500 kW - Begriffe, Anforderungen,
Prüfungen und Kennzeichnung
Chaudières de chauffage - Partie 5 : Chaudières spéciales pour combustibles solides, à
chargement manuel et automatique, puissance utile inférieure ou égale à 500 kW -
Définitions, exigences, essais et marquage
Ta slovenski standard je istoveten z: EN 303-5:2021+A1:2022
ICS:
91.140.10 Sistemi centralnega Central heating systems
ogrevanja
97.100.30 Grelniki na trdo gorivo Solid fuel heaters
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN 303-5:2021+A1
EUROPEAN STANDARD
NORME EUROPÉENNE
November 2022
EUROPÄISCHE NORM
ICS 91.140.10 Supersedes EN 303-5:2021
English Version
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
Chaudières de chauffage - Partie 5 : Chaudières Heizkessel - Teil 5: Heizkessel für feste Brennstoffe,
spéciales pour combustibles solides, à chargement manuell und automatisch beschickte Feuerungen,
manuel et automatique, puissance utile inférieure ou Nennwärmeleistung bis 500 kW - Begriffe,
égale à 500 kW - Définitions, exigences, essais et Anforderungen, Prüfungen und Kennzeichnung
marquage
This European Standard was approved by CEN on 15 February 2021 and includes Amendment 1 approved by CEN on 14
September 2022.
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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 303-5:2021+A1:2022 E
worldwide for CEN national Members.
Contents Page
European foreword . 5
Introduction . 7
1 Scope . 8
1.1 General . 8
1.2 Fuels . 9
2 Normative references . 10
3 Terms and definitions . 13
4 Requirements . 20
4.1 General requirements . 20
4.1.1 General requirements for all boilers . 20
4.1.2 General requirements for condensing boilers . 21
4.2 Construction requirements . 22
4.2.1 Production documentation. 22
4.2.2 Heating boilers (parts) made of steel . 23
4.2.3 Boilers made of cast materials . 29
4.2.4 Design requirements . 30
4.2.5 Requirements for boilers with outside combustion air supply and room sealed
appliances . 33
4.3 Safety requirements . 34
4.3.1 General . 34
4.3.2 Manual stoked boilers . 35
4.3.3 Safety against back burning for automatic stoked boilers. 35
4.3.4 Prevention of the transmission of toxic components . 38
4.3.5 Safety against fuel overload of the boiler or interruption in fuel supply . 39
4.3.6 Safety against lack of air supply or insufficient combustion . 39
4.3.7 Surface temperatures . 40
4.3.8 Leakage of the boilers category 1 . 40
4.3.9 Temperature control and limiting devices . 40
4.3.10 Assessment of additional risk . 42
4.3.11 Additional safety requirements for condensing boilers . 42
4.3.12 Additional safety requirements for outside air supply boilers and room sealed
appliances . 43
4.3.13 Heating boiler accessories . 43
4.4 Performance requirements . 44
4.4.1 General . 44
4.4.2 Energy efficiency . 44
4.4.3 Flue gas temperature . 46
4.4.4 Draught . 46
4.4.5 Combustion period . 46
4.4.6 Minimum heat output . 47
4.4.7 Emission limits . 47
5 Test . 49
5.1 Test conditions . 49
5.1.1 General . 49
5.1.2 Choice of boiler and fittings to be tested . 49
5.1.3 Condition of the boiler . 50
5.1.4 Type test . 50
5.2 Measuring instruments and methods . 50
5.3 Test fuel . 51
5.4 Pressure test for boilers of sheet or sheet metal of non-ferrous metal . 53
5.4.1 Tests to be carried out before production . 53
5.4.2 Test during production. 53
5.5 Pressure test for boilers of cast iron or non-ferrous metals . 54
5.5.1 Test to be carried out before production . 54
5.5.2 Test during production. 54
5.6 Conducting the boiler performance test . 55
5.6.1 General . 55
5.6.2 Setting up the test rig . 55
5.6.3 Measured quantities . 56
5.6.4 Test method and test duration . 57
5.7 Determination of the heat output and the efficiency of the boiler . 57
5.7.1 Method for the measurement of the heat output . 57
5.7.2 Determining the nominal heat output . 58
5.7.3 Determining the minimum heat output . 58
5.7.4 Verification of nominal heat output with condensation . 59
5.7.5 Verification of the minimum continuous heat output with condensation . 59
5.7.6 Determination of the boiler efficiency (direct method) . 59
5.7.7 Electrical consumption . 59
5.8 Determination of the emission values . 60
5.8.1 Heating boiler with manual stoking . 60
5.8.2 Heating boiler with automatic stoking . 60
5.9 Calculation . 60
5.9.1 Boiler heat output .
...