EN 15502-1:2021+A1:2023
(Main)Gas-fired heating boilers - Part 1: General requirements and tests
Gas-fired heating boilers - Part 1: General requirements and tests
This European Standard specifies the common requirements and test methods, 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.
NOTE For further background information on appliance types see CEN/TR 1749:2014 [1].
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 water is below or above 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 instructions for installation to be either a "condensing" boiler or a "low temperature boiler" or a "standard boiler" or an "other boiler". If no declaration is given the boiler is to be considered both a "standard boiler" and an "other boiler";
NOTE The Ecodesign Directive defines "other boilers", "low temperature boilers" and "condensing boilers". The Boiler Efficiency Directive defines "standard boilers", "low temperature boilers" and "condensing boilers". Depending on the legislation applied, a boiler can be both "a standard boiler" and an "other boiler"."
f) which are intended to be installed inside a building or in a partially protected place;
g) which are intended to produce also hot water either by the instantaneous or storage principle as a single unit.
This European Standard applies to boilers designed for sealed water systems or for open water systems.
NOTE 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 (see Annex EE).
This European Standard is not intended to cover appliances designed and constructed to burn gas containing toxic components.
Heizkessel für gasförmige Brennstoffe - Teil 1: Allgemeine Anforderungen und Prüfungen
Dieses Dokument legt die allgemeinen Anforderungen und Prüfverfahren sowie die Klassifizierung, Kennzeichnung und Energiekennzeichnung von Zentralheizkesseln für gasförmige Brennstoffe fest, die mit atmosphärischen Brennern, gebläseunterstützten atmosphärischen Brennern oder Brennern mit vollständiger Vormischung ausgerüstet sind und nachfolgend kurz „Kessel“ genannt werden.
Dieses Dokument ist in Verbindung mit den entsprechenden Teilen 2 (Teil 2 1, Teil 2 2 und folgende) anzuwenden.
Dieses Dokument gilt für Kessel der Bauarten B und C:
ANMERKUNG Für weitere Hintergrundinformationen zu Gerätearten siehe EN 1749:2020.
a) die mit einem oder mehreren brennbaren Gasen der drei Gasfamilien mit den in EN 437:2021 genannten Drücken betrieben werden;
b) bei denen die Temperatur des Wassers unter normalen Betriebsbedingungen 105 °C nicht überschreitet;
c) deren maximaler wasserseitiger Betriebsdruck 6 bar nicht überschreitet;
d) bei denen sich unter bestimmten Bedingungen Kondenswasser bildet;
e) die in der Installationsanleitung entweder als „Brennwertkessel“ oder als „Niedertemperaturkessel“ oder als „Standardkessel“ oder als „andere Kessel“ bezeichnet werden. Wenn keine Angabe gemacht wird, wird der Kessel sowohl als „Standardkessel“ als auch als „anderer Kessel“ betrachtet;
f) die für die Aufstellung im Inneren eines Gebäudes oder an einem teilweise geschützten Ort vorgesehen sind;
g) die dafür vorgesehen sind, nach dem Durchlaufprinzip oder nach dem Speicherprinzip auch Warmwasser herzustellen, wobei das Ganze als eine Einheit vertrieben wird.
Dieses Dokument ist für Kessel anwendbar, die für geschlossene oder offene Wassersysteme ausgelegt sind.
ANMERKUNG Diese allgemeine Norm und die speziellen Normen (siehe Teil 2) enthalten Anforderungen an Kessel mit bekannter Bauweise. Für Kessel mit alternativer Bauweise, die eventuell nicht vollständig durch diese oder eine spezielle Norm abgedeckt werden, bedarf das Risiko, das mit dieser alternativen Bauweise verbunden ist, einer Abschätzung.
Ein Beispiel für eine auf einer Risikoanalyse beruhende Bewertungsmethode wird in Abschnitt 11 beschrieben.
Dieses Dokument ist nicht für Geräte zum Anschluss an Gasversorgungsnetze bestimmt, bei denen die Qualität des zur Verteilung kommenden Gases wahrscheinlich über die Lebensdauer des Geräts stark variiert (siehe Anhang AB).
Dieses Dokument behandelt nicht alle Anforderungen an:
aa) Geräte über 1 000 kW;
ab) Geräte, die für die Verbrennung von Gas ausgelegt und konstruiert sind, das Kohlenmonoxid und andere giftige Komponenten enthält;
ac) Geräte mit einer Zusatzheizung.
Chaudières de chauffage central utilisant les combustibles gazeux - Partie 1: Exigences générales et essais
Le présent document spécifie les exigences et les méthodes d’essai communes, ainsi que la classification, le marquage et l’étiquetage énergétique concernant les chaudières de chauffage central utilisant les combustibles gazeux et équipées de brûleurs atmosphériques, de brûleurs atmosphériques assistés d’un ventilateur ou de brûleurs à prémélange total, ci-après dénommées « chaudières ».
Le présent document est à utiliser conjointement avec les Parties 2 spécifiques (Partie 2-1, Partie 2-2 et suivantes).
Le présent document s’applique aux chaudières des types B et C :
NOTE Pour de plus amples informations sur la structure des types d’appareils, voir EN 1749:2020.
a) utilisant un ou plusieurs combustibles gazeux appartenant aux trois familles de gaz et aux pressions indiquées dans l’EN 437:2021 ;
b) dont la température de l’eau ne dépasse pas 105 °C en fonctionnement normal ;
c) dont la pression maximale de service dans le circuit d’eau ne dépasse pas 6 bar ;
d) pouvant condenser dans certaines circonstances ;
e) déclarées dans la notice d’installation comme étant « chaudière à condensation » ou « chaudière à basse température » ou « chaudière standard » ou « autre chaudière ». En l’absence d’information, la chaudière doit être considérée comme une « chaudière standard » ou une « autre chaudière » ;
f) destinées à être installées dans un bâtiment ou à un emplacement partiellement protégé ;
g) destinées à produire aussi instantanément de l’eau chaude ou capables de la stocker, sous forme monobloc.
Le présent document s’applique aux chaudières à circuit d’eau fermé ou ouvert.
NOTE La présente norme et les normes spécifiques (voir Parties 2) fournissent des exigences relatives aux chaudières dont la construction est connue. Pour les chaudières de construction différente susceptibles de ne pas être couvertes par la présente norme ou une norme spécifique, le risque associé à cette construction différente doit être évalué.
L’Article 11 donne un exemple de méthodologie d’évaluation basée sur l’évaluation des risques.
Le présent document ne s’applique pas aux appareils destinés à être raccordés au réseau de gaz lorsque la qualité du gaz distribué peut varier de façon importante pendant la durée de vie de l’appareil (voir Annexe AB).
Le présent document ne couvre pas toutes les exigences pour :
aa) les appareils d’une puissance supérieure à 1 000 kW ;
ab) les appareils conçus et construits pour brûler un gaz contenant du monoxyde de carbone ou d’autres composants toxiques ;
ac) les appareils équipés d’un dispositif de chauffage d’appoint.
Plinski kotli za ogrevanje - 1. del: Splošne zahteve in preskusi
Ta evropski standard določa splošne zahteve in preskusne metode ter klasifikacijo, označevanje in energetsko označevanje plinskih kotlov za centralno ogrevanje z nameščenimi atmosferskimi gorilniki, atmosferskimi gorilniki z ventilatorjem ali gorilniki s popolnim vnaprejšnjim mešanjem (v nadaljevanju: »kotli«).
Ta evropski standard je treba uporabljati v povezavi s posebnimi 2. deli (del 2-1 in naslednji deli).
Ta evropski standard se uporablja za kotle tipov B in C:
OPOMBA: Za dodatne informacije o tipih kotlov glej standard CEN/TR 1749:2014 [1].
a) ki uporabljajo enega ali več gorljivih plinov iz treh družin plinov pri tlakih, navedenih v standardu EN 437;
b) pri katerih temperatura vode pri običajnem delovanju ne presega 105 °C;
c) pri katerih najvišji obratovalni tlak v vodnem omrežju ne presega 6 barov;
d) ki lahko pod določenimi pogoji povzročijo kondenzacijo;
e) ki so v navodilih za namestitev navedeni kot »kondenzacijski kotli« ali »nizkotemperaturni kotli« ali »standardni kotli« ali »drugi kotli«; Če ni navedene deklaracije, se kotel šteje za »standardni kotel« in »drug kotel«.
OPOMBA: Direktiva o okoljsko primerni zasnovi opredeljuje »druge kotle«, »nizkotemperaturne kotle« in »kondenzacijske kotle«. OPOMBA: Direktiva o učinkovitosti kotlov opredeljuje »standardne kotle«, »nizkotemperaturne kotle« in »kondenzacijske kotle«. Glede na uporabljeno zakonodajo je kotel lahko »standardni kotel« in »drug kotel«.
f) ki so namenjeni vgradnji v zgradbi ali delno zaščitenem prostoru;
g) ki so namenjeni ogrevanju vode po načelu pretočnosti ali načelu shranjevanja.
Ta evropski standard se uporablja za kotle za zaprte ali odprte vodne sisteme.
OPOMBA: Ta splošni standard in posebni standardi (glej 2. del) določajo zahteve za kotle z znanimi konstrukcijami. V zvezi s kotli z drugačnimi konstrukcijami, ki morda niso v celoti zajeti v tem standardu ali posebnem standardu, je treba oceniti tveganje, povezano z drugačno konstrukcijo.
Primer metodologije ocenjevanja, ki temelji na oceni tveganja, je naveden v točki 11.
Ta evropski standard ni namenjen obravnavi aparatov za povezavo s plinskimi omrežji, v katerih bo kakovost distribuiranega plina med življenjsko dobo aparata verjetno znatno nihala (glej dodatek EE).
Ta evropski standard ni namenjen obravnavi aparatov, zasnovanih in izdelanih za zgorevanje plina, ki vsebuje strupene sestavine.
General Information
- Status
- Published
- Publication Date
- 12-Dec-2023
- Technical Committee
- CEN/TC 109 - Central heating boilers using gaseous fuels
- Drafting Committee
- CEN/TC 109/WG 1 - Domestic central heating boilers using gaseous fuels
- Current Stage
- 6060 - Definitive text made available (DAV) - Publishing
- Start Date
- 13-Dec-2023
- Completion Date
- 13-Dec-2023
Relations
- Effective Date
- 18-Oct-2023
- Merged From
EN 15502-1:2021/AC:2022 - Gas-fired heating boilers - Part 1: General requirements and tests - Effective Date
- 18-Oct-2023
Overview
EN 15502-1:2021+A1:2023 (CEN) is the European standard for gas-fired central heating boilers - Part 1: General requirements and tests. It defines common requirements, classification, marking and energy labelling for boilers fitted with atmospheric, fan‑assisted atmospheric or fully premixed burners. This Part 1 is intended to be used together with the specific Part 2 documents (Part 2‑1 and following) and applies to appliance types B and C.
Key scope points:
- Applies to boilers using one or more combustible gases from the three gas families at pressures per EN 437.
- Covers boilers where water temperature may be below or above 105 °C and where max water‑side operating pressure ≤ 6 bar.
- Includes condensing, low‑temperature and standard boilers; instantaneous or storage domestic hot water variants.
- Applies to sealed and open water systems, intended for indoor or partially protected installation.
- Excludes appliances for gas networks with highly variable gas quality and boilers burning gases with toxic components (see Annex EE).
Key topics and technical requirements
This standard sets out technical and test requirements across product life cycle and safety domains, for example:
- Classification, marking & energy labelling - gas families, appliance types, pressure classes.
- Construction & materials - materials, corrosion durability, insulation and water‑contact materials.
- Burners & combustion - atmospheric, fan‑assisted and premixed burner requirements and conversion to different gases.
- Controls & safety devices - gas pressure regulators, ignition, flame supervision, gas/air ratio control, thermostats, remote control.
- Operational tests - soundness (gas, combustion, water circuits), hydraulic resistance, heat input/output determination, ignition and flame stability, limiting temperatures.
- Electrical & electromagnetic safety, fan behaviour, drainage, frost protection, and performance for domestic hot water.
- Risk assessment - Clause 11 gives an example methodology for alternative constructions not fully covered by the standard.
Applications & users
Who uses EN 15502-1:
- Manufacturers - product design, type testing, documentation, CE/conformity assessment and energy labelling.
- Testing and certification bodies - standardized test methods and acceptance criteria.
- Installers and technical specifiers - selecting compliant boilers for buildings and systems.
- Regulators and compliance officers - aligning national rules with CEN requirements.
- R&D and safety engineers - assessing alternative constructions and carrying out risk assessments.
Practical uses:
- Verifying compliance for market access, preparing installation instructions, conducting safety and performance testing, and ensuring compatibility with ecodesign and efficiency labelling requirements.
Related standards
- EN 15502 Part 2 series (product‑specific requirements and tests) - to be used in conjunction with Part 1.
- EN 437 - reference and limit gases.
- CEN/TR 1749:2014 - background on appliance types.
Keywords: EN 15502-1:2021+A1:2023, gas-fired heating boilers, boiler testing, CEN standard, condensing boiler, low temperature boiler, energy labelling, Part 1 general requirements.
Frequently Asked Questions
EN 15502-1:2021+A1:2023 is a standard published by the European Committee for Standardization (CEN). Its full title is "Gas-fired heating boilers - Part 1: General requirements and tests". This standard covers: This European Standard specifies the common requirements and test methods, 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. NOTE For further background information on appliance types see CEN/TR 1749:2014 [1]. 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 water is below or above 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 instructions for installation to be either a "condensing" boiler or a "low temperature boiler" or a "standard boiler" or an "other boiler". If no declaration is given the boiler is to be considered both a "standard boiler" and an "other boiler"; NOTE The Ecodesign Directive defines "other boilers", "low temperature boilers" and "condensing boilers". The Boiler Efficiency Directive defines "standard boilers", "low temperature boilers" and "condensing boilers". Depending on the legislation applied, a boiler can be both "a standard boiler" and an "other boiler"." f) which are intended to be installed inside a building or in a partially protected place; g) which are intended to produce also hot water either by the instantaneous or storage principle as a single unit. This European Standard applies to boilers designed for sealed water systems or for open water systems. NOTE 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 (see Annex EE). This European Standard is not intended to cover appliances designed and constructed to burn gas containing toxic components.
This European Standard specifies the common requirements and test methods, 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. NOTE For further background information on appliance types see CEN/TR 1749:2014 [1]. 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 water is below or above 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 instructions for installation to be either a "condensing" boiler or a "low temperature boiler" or a "standard boiler" or an "other boiler". If no declaration is given the boiler is to be considered both a "standard boiler" and an "other boiler"; NOTE The Ecodesign Directive defines "other boilers", "low temperature boilers" and "condensing boilers". The Boiler Efficiency Directive defines "standard boilers", "low temperature boilers" and "condensing boilers". Depending on the legislation applied, a boiler can be both "a standard boiler" and an "other boiler"." f) which are intended to be installed inside a building or in a partially protected place; g) which are intended to produce also hot water either by the instantaneous or storage principle as a single unit. This European Standard applies to boilers designed for sealed water systems or for open water systems. NOTE 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 (see Annex EE). This European Standard is not intended to cover appliances designed and constructed to burn gas containing toxic components.
EN 15502-1:2021+A1:2023 is classified under the following ICS (International Classification for Standards) categories: 27.060.30 - Boilers and heat exchangers; 91.140.10 - Central heating systems. The ICS classification helps identify the subject area and facilitates finding related standards.
EN 15502-1:2021+A1:2023 has the following relationships with other standards: It is inter standard links to EN 15502-1:2021, EN 15502-1:2021/AC:2022. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN 15502-1:2021+A1:2023 is associated with the following European legislation: EU Directives/Regulations: 2016/426, 811/2013, 813/2013; Standardization Mandates: M/066, M/535, M/595. 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.
You can purchase EN 15502-1:2021+A1:2023 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of CEN standards.
Standards Content (Sample)
SLOVENSKI STANDARD
01-december-2024
Nadomešča:
SIST EN 15502-1:2022
SIST EN 15502-1:2022/AC:2023
Plinski kotli za ogrevanje - 1. del: Splošne zahteve in preskusi
Gas-fired heating boilers - Part 1: General requirements and tests
Heizkessel für gasförmige Brennstoffe - Teil 1: Allgemeine Anforderungen und
Prüfungen
Chaudières de chauffage central utilisant les combustibles gazeux - Partie 1: Exigences
générales et essais
Ta slovenski standard je istoveten z: EN 15502-1:2021+A1:2023
ICS:
27.060.30 Grelniki vode in prenosniki Boilers and heat exchangers
toplote
91.140.10 Sistemi centralnega Central heating systems
ogrevanja
97.100.20 Plinski grelniki Gas heaters
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN 15502-1:2021+A1
EUROPEAN STANDARD
NORME EUROPÉENNE
December 2023
EUROPÄISCHE NORM
ICS 27.060.30; 91.140.10 Supersedes EN 15502-1:2021
English Version
Gas-fired heating boilers - Part 1: General requirements
and tests
Chaudières de chauffage central utilisant les Heizkessel für gasförmige Brennstoffe - Teil 1:
combustibles gazeux - Partie 1: Exigences générales et Allgemeine Anforderungen und Prüfungen
essais
This European Standard was approved by CEN on 25 July 2021 and includes Corrigendum 1 issued by CEN on 7 September 2022
and Amendment approved by CEN on 11 October 2023. This European Standard was corrected and reissued by the CEN-
CENELEC Management Centre on 05 June 2024.
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 NORMALISATIO N
EUROPÄISCHES KOMITEE FÜR NORMUN G
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 15502-1:2021+A1:2023 E
worldwide for CEN national Members.
Contents Page
European foreword . 9
Introduction . 11
1 Scope . 12
2 Normative references . 13
3 Terms, definitions and symbols. 15
4 Classification . 36
4.1 Gases and categories . 36
4.2 Mode of air supply and evacuation of the combustion products . 36
4.3 Maximum water-side operating pressure . 36
5 Construction . 36
5.1 General . 36
5.1.1 General requirements . 36
5.1.2 General verfication . 37
5.2 Conversion to different gases . 37
5.3 Materials . 37
5.3.1 General . 37
5.3.2 Materials and thicknesses of walls or tubes with water side operating pressure for
boilers of pressure class-3 . 38
5.3.3 Domestic water connections . 39
5.3.4 Thermal Insulation . 39
5.3.5 Materials in contact with water for human consumption . 39
5.3.6 Durability against corrosion of metallic combustion product circuits . 40
5.4 Method of construction . 41
5.4.1 Design . 41
5.4.2 Checking the state of operation . 42
5.4.3 Use and servicing . 42
5.4.4 Connections to the gas and water pipes . 43
5.4.5 Soundness . 43
5.4.6 Supply of combustion air and evacuation of the combustion products . 44
5.4.7 Dampers . 44
5.4.8 Air proving . 44
5.4.9 Gas/air ratio controls . 45
5.4.10 Fan . 46
5.4.11 Drainage . 46
5.4.12 Operational safety in the event of failure of the auxiliary energy . 46
5.4.13 Special provision for Low Temperature Boilers and Condensing Boilers . 46
5.5 Burners . 47
5.6 Pressure test points . 48
5.7 Requirements for the application of control and safety devices . 48
5.7.1 General. 48
5.7.2 Adjusters and range-rating devices . 48
5.7.3 Gas circuit . 49
5.7.4 Gas pressure regulator . 50
5.7.5 Ignition devices. 51
5.7.6 Flame supervision devices . 51
5.7.7 Gas/air ratio control tubes . 52
5.7.8 Thermostats and water flow temperature limiting devices . 52
5.7.9 Remote control . 53
5.7.10 Expansion vessel and pressure gauge . 54
5.7.11 Protection against frost for boilers intended to be installed in a partially protected
place 54
5.7.12 Adjusting, control and safety devices for the domestic hot water circuit . 55
6 Electrical and electromagnetic safety . 55
7 Controls . 55
7.1 General . 55
7.2 Detailed specifications . 56
7.2.1 Control and safety devices . 56
7.2.2 Valves used in boilers . 56
7.2.3 Not relevant aspects for controls tested in combination with the boiler . 56
7.2.4 Relevant aspects for controls tested in combination with the boiler . 57
7.3 Thermostats and flow temperature limiting devices . 57
7.3.1 General. 57
7.3.2 Construction requirements . 58
7.3.3 Performance . 59
8 Operational requirements . 61
8.1 General . 61
8.1.1 Characteristics of the reference and limit gases . 61
8.1.2 General test conditions . 62
8.2 Soundness . 66
8.2.1 Soundness of the gas circuit . 66
8.2.2 Soundness of the combustion circuit . 67
8.2.3 Soundness of the water circuit . 67
8.2.4 Soundness of the domestic water circuit . 68
8.3 Hydraulic resistance . 68
8.3.1 Requirements . 68
8.3.2 Test conditions . 68
8.4 Heat inputs and heat output . 69
8.4.1 Determination of the nominal heat input or the maximum and minimum heat input
8.4.2 Adjustment of the heat input by the downstream gas pressure . 71
8.4.3 Ignition rate . 71
8.4.4 Nominal output . 71
8.4.5 Verification of the nominal condensing output . 71
8.4.6 Nominal domestic hot water heat input . 72
8.4.7 Water pressure to obtain the nominal heat input for instantaneous combination
boilers . 72
8.4.8 Obtaining the domestic hot water temperature for instantaneous combination
boilers . 72
8.4.9 Heating-up time of the domestic hot water . 73
8.5 Limiting temperatures. 73
8.5.1 General . 73
8.5.2 Limiting temperatures of the adjusting, control and safety devices . 73
8.5.3 Limiting temperatures of the side walls, the front and the top . 74
8.5.4 Limiting temperature of the test panels and the floor . 74
8.6 Ignition, cross lighting, flame stability . 75
8.6.1 General . 75
8.6.2 Limit conditions . 75
8.6.3 Special flue conditions . 76
8.6.4 Reduction of the gas rate of the ignition burner . 77
8.7 Reduction of the gas pressure . 77
8.7.1 Requirements . 77
8.7.2 Test conditions . 77
8.8 Defective closure of the gas valve immediately upstream of the main burner . 77
8.8.1 Requirements . 77
8.8.2 Test conditions . 78
8.9 Pre-purge . 78
8.10 Functioning of a permanent ignition burner when the fan stops during the standby
time 78
8.10.1 Requirements . 78
8.10.2 Test conditions . 78
8.11 Adjustment, control and safety devices . 78
8.11.1 Requirement . 78
8.11.2 Test method for determining the operating temperature range . 78
8.11.3 Combination Boilers . 79
8.11.4 Control devices . 82
8.11.5 Ignition devices. 82
8.11.6 Flame supervision device . 84
8.11.7 Gas pressure regulator . 87
8.11.8 Thermostats and flow temperature limiting devices . 88
8.12 Carbon monoxide . 90
8.12.1 General. 90
8.12.2 Limit conditions. 92
8.12.3 Special conditions . 92
8.12.4 Sooting . 93
8.12.5 Condensate discharge blockage test . 94
8.13 NO . 94
x
8.13.1 Requirement . 94
8.13.2 Test methods . 95
8.13.3 Calculation of emissions of NO in mg/kWh based on GCV . 97
X
8.14 Special provisions for boilers intended to be installed in a partially protected place
8.14.1 Frost protection system for boilers intended to be installed in a partially protected
place 98
8.14.2 Protection against the ingress of rain . 98
8.15 Formation of condensate . 98
8.15.1 Requirements . 98
8.15.2 Test conditions . 98
8.16 Temperature of combustion products . 99
8.16.1 Requirements . 99
8.16.2 Test conditions . 99
8.17 Sound power level L . 99
WA
9 Useful efficiencies . 99
9.1 General . 99
9.1.1 Correction of measured efficiency to reference conditions . 99
9.1.2 Use of the general test conditions . 100
9.2 Useful efficiency at the nominal heat input. 100
9.2.1 Requirements . 100
9.2.2 Tests . 100
9.3 Useful efficiency at part load . 102
9.3.1 Requirements . 102
9.3.2 Tests . 102
9.4 Heat output, Seasonal energy efficiency and energy consumption . 109
9.4.1 Rated heat output (P and P ) . 109
rated 4
9.4.2 Useful heat output at 30% of rated heat output and low-temperature regime (P )
9.4.3 Useful efficiency (GCV) at rated heat output and high-temperature regime (η ) 109
9.4.4 Useful efficiency (GCV) at 30% of rated heat output and low-temperature regime
(η1) 110
9.4.5 Ignition burner power consumption (GCV) (P ) . 110
ign
9.4.6 Calculation of the seasonal space heating energy efficiency (η ) . 110
s
9.4.7 Calculation of the annual energy consumption for space heating (Q ) (GCV) . 112
HE
9.4.8 Water heating energy efficiency and energy consumption of combination boilers for
water heating mode . 112
10 Electric auxiliary energy . 113
10.1 Auxiliary energy consumption . 113
10.1.1 General . 113
10.1.2 System boundaries . 113
10.1.3 Auxiliary energy at nominal heat input . 113
10.1.4 Auxiliary energy at part load . 114
10.1.5 Auxiliary energy at stand-by . 114
10.2 Auxiliary electricity consumption measurements required for eco-design and
labelling regulations . 114
10.2.1 General . 114
10.2.2 System boundaries . 114
10.2.3 Auxiliary electricity consumption [kW] at nominal heat input . 115
10.2.4 Auxiliary electricity consumption at part load [kW] . 115
10.2.5 Auxiliary electricity consumption at stand by [kW] . 115
11 Risk assessment . 115
12 Marking and instructions . 116
12.1 Boiler marking . 116
12.1.1 Data plate . 116
12.1.2 Markings related to the state of adjustment . 117
12.1.3 Packaging . 117
12.1.4 Warnings notices on the boiler and the packaging . 117
12.1.5 Other information . 118
12.2 Instructions . 119
12.2.1 Instructions for installation . 119
12.2.2 Instructions for use and servicing . 124
12.2.3 Conversion instructions . 124
12.3 Presentation . 125
Annex A (normative) Properties of carbon and stainless steels . 133
Annex B (normative) Minimum requirements for cast iron . 134
Annex C (normative) Parts in aluminium and aluminium alloys . 135
Annex D (normative) Parts in copper or copper alloys . 136
Annex E (normative) Minimum thicknesses for rolled parts . 137
Annex F (normative) Nominal minimum thicknesses of boiler sections of cast materials
under water pressure . 138
Annex G (normative) Parameters for welded joints and welding processes . 139
Annex H (informative) Examples of the composition of the gas circuit according to 5.7.3.2
Annex I (informative) Compilation of the test conditions for the various gas families . 153
Annex J (normative) Calculation of conversions of NOx . 155
Annex K (informative) Example of calculation of the weighting factors NOx . 157
Annex L (informative) Practical method of calibrating the test rig to enable the heat loss
Dp to be determined . 159
Annex M (informative) Means of determining the ignition time at full rate . 160
Annex N (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 . 161
Annex O (informative) Example of a risk assessment method. 162
Annex P (informative) Examples of risk assessment with a method described in Annex O165
Annex Q (informative) Realisation of a protective measure. 170
Annex R (informative) Overall classification of a basic risk . 172
Annex S (informative) Not exhaustive list of classification examples . 175
Annex T (normative) Correction for the determined efficiency in the low water
temperature test of low temperature boilers (LTB) and condensing boilers (CB) . 178
Annex U (normative) Use of test gases . 180
Annex V (informative) Alternative method for heat output as enthalpy difference. 181
Annex AA (informative) Product Information related to Eco-design Regulation and
Labelling Regulation . 184
Annex AB (informative) Variations in gas quality . 188
Annex AC (normative) Non-exhaustive list of materials used in contact with drinking water
Annex ZA (informative) Left empty on purpose . 195
Annex ZB (informative) Clauses of this European Standard addressing the methods for the
verification of the efficiency of the EU Directive 92/42/EEC, relating to the efficiency of new
hot boilers with an output of 4 – 400 kW . 196
Annex ZC (informative) Relationship between this European Standard and the ecodesign
requirements of Commission Regulation (EU) No 813/2013 L 239/136 aimed to be covered
Annex ZD (informative) Relationship between this European Standard and the energy
labelling requirements of Commission Delegated Regulation (EU) No 811/2013 L 239/1
aimed to be covered . 200
Annex ZE (informative) Relationship between this European Standard and the essential
requirements of Regulation (EU) 2016/426 of the European Parliament and of the Council
of 9 March 2016 on appliances burning gaseous fuels and repealing Directive 2009/142/EC
aimed to be covered . 203
Bibliography . 213
European foreword
This document (EN 15502-1:2021+A1:2023) has been prepared by Technical Committee CEN/TC 109
“Central heating boilers using gaseous fuels”, the secretariat of which is held by NEN.
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 June 2024, and conflicting national standards shall be
withdrawn at the latest by June 2024.
The start and finish of text introduced or altered by corrigendum is indicated in the text by tags ˜™.
This document supersedes !EN 15502-1:2021".
This document includes Amendment 1, approved by CEN on 2023-10-11.
The start and finish of text introduced or altered by amendment is indicated in the text by tags !"
!deleted paragraphs"
EN 15502 consists of the following parts under the general title “Gas-fired heating boilers":
— Part 1: General requirements and tests (this standard);
— Part 2-1: Specific standard for type C appliances and type B2, B3 and B5 appliances of a nominal heat
input not exceeding 1 000 kW;
—
Part 2-2: Specific standard for type B1 appliances.
This document is to be used in conjunction with the specific Parts 2.
This document has been prepared under mandates M89/6 and M066, given to CEN by the European
Commission and the European Free Trade Association, and supports essential requirements as meant in
article 3 of EU Directive 2009/142/EC, relating to appliances burning gaseous fuels and the verification
methods valid for production and measurements, as meant in article 5.2 of EU Directive 92/42/EEC,
relating to the efficiency requirements for new hot water boilers fired with liquid or gaseous fuels, with
an output of 4 – 400 kW.
This document has been prepared under the mandates M/534 and M/535, given to CEN by the European
Commission and the European Free Trade Association to provide a means of conforming to:
— requirements of Commission Regulation (EC) 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;
— requirements of Commission Delegated Regulation (EC) No 811/2013 of 18 February 2013
supplementing Directive 2010/30/EC of the European Parliament and of the Council with regard to
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.
For relationship with EU Directive(s) and Commission Regulations, see informative Annexes ZB, ZC and
ZD, ZE which are integral parts of this document.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
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, 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, Turkey and the United
Kingdom.
Introduction
The basic function of gas-fired heating boiler is to generate heat by direct heat transfer in a heat
exchanger, from the combustion gasses to the water.
The boiler can include in one design more than one function. It can include for example:
— a sanitary hot water function;
— a function to supply the combustion air from the outside/open air;
— a function to dispose the combustion products to the outside/open air.
The boiler design can be supplied to the market in more than one part. If the boiler is supplied to the
market in multiple parts, the boiler is the assembly of various parts according to the instructions for
installation.
Boilers can be designed to be connected to specific parts of a building. Connection to a chimney and the
means of combustion air supply is particularly relevant.
This document is a first part of a series of standards that will describe the special requirements for
specific appliance types of the boiler. This European Standard contains the common requirements that
are applicable for the majority of the appliance types of the boiler.
Matters related to quality assurance systems, tests during production, and certificates of conformity of
auxiliary devices are not dealt with in this series of European Standards.
1 Scope
This document specifies the common requirements and test methods, 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 document is to be used in conjunction with the specific Parts 2 (Part 2-1, Part 2-2 and following
ones).
This document applies to boilers of types B and C:
NOTE For further background information on appliance types see EN 1749:2020.
a) that use one or more combustible gases of the three gas families at the pressures stated in EN
437:2021;
b) where the temperature of the water 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 instructions for installation to be either a "condensing" boiler or a "low
temperature boiler" or a "standard boiler" or an "other boiler". If no declaration is given the boiler is
to be considered both a "standard boiler" and an "other boiler";
f) which are intended to be installed inside a building or in a partially protected place;
g) which are intended to produce also hot water either by the instantaneous or storage principle as a
single unit.
This document applies to boilers designed for sealed water systems or for open water systems.
NOTE 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 document 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 (see Annex AB).
This document does not cover all the requirements for :
aa) appliances above 1000 kW;
ab) appliances designed and constructed to burn gas containing carbon monoxide or other toxic
components;
ac) appliance having a supplementary heater.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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 88-1:2011+A1:2016, Pressure regulators and associated safety devices for gas appliances - Part 1:
Pressure regulators for inlet pressures up to and including 50 kPa
EN 125:2010+A1:2015, Flame supervision devices for gas burning appliances - Thermoelectric flame
supervision devices
EN 126:2012, Multifunctional controls for gas burning appliances
EN 161:2011+A3:2013, Automatic shut-off valves for gas burners and gas appliances
EN 298:2012, Automatic burner control systems for burners and appliances burning gaseous or liquid fuels
EN 437:2021, Test gases - Test pressures - Appliance categories
EN 573-1:2004, Aluminium and aluminium alloys - Chemical composition and form of wrought products -
Part 1: Numerical designation system EN 1057:2006+A1:2010, Copper and copper alloys - Seamless, round
copper tubes for water and gas in sanitary and heating applications
EN 1092-1:2018, Flanges and their joints —- Circular flanges for pipes, valves, fittings and accessories, PN
designated – Part 1: Steel flanges
EN 1092-2:1997, Flanges and their joints - Circular flanges for pipes, valves, fittings and accessories, PN
designated - Part 2: Cast iron flanges
EN 1092-3:2003, Flanges and their joints - Circular flanges for pipes, valves, fittings and accessories, PN
designated - Part 3: Copper alloy flanges
EN 1092-4:2002, Flanges and their joints - Circular flanges for pipes, valves, fittings and accessories, PN
designated - Part 4: Aluminium alloy flanges
EN 1561:2011, Founding - Grey cast irons
EN 1749:2020, Classification of gas appliances according to the method of supplying combustion air and of
evacuation of the combustion products
EN 1856-1:2009, Chimneys - Requirements for metal chimneys - Part 1: System chimney products
EN 10029:2010, Hot-rolled steel plates 3 mm thick or above - Tolerances on dimensions and shape
EN 10088-1:2014, Stainless steels - Part 1: List of stainless steels EN 10226-1:2004, Pipe threads where
pressure tight joints are made on the threads - Part 1: Taper external threads and parallel internal threads
- Dimensions, tolerances and designation
EN 10226-2:2005, Pipe threads where pressure tight joints are made on the threads - Part 2: Taper external
threads and taper internal threads - Dimensions, tolerances and designation
EN 12067-2:2004, Gas/air ratio controls for gas burners and gas burning appliances - Part 2: Electronic
types
EN 13203-1:2015, Gas fired domestic appliances producing hot water - Part 1: Assessment of
pe
...
표준 EN 15502-1:2021+A1:2023은 가스 연료 난방 보일러에 대한 일반 요구 사항 및 테스트 방법을 상세히 규정하고 있습니다. 이 유럽 표준은 대기 압력 버너, 팬 보조 대기 압력 버너 또는 완전 혼합 버너가 장착된 중앙 난방 보일러의 분류, 마킹 및 에너지 라벨링을 포함하여 가스 연료 보일러에 대한 공통 요구 사항을 명확히 설정합니다. 본 표준의 범위는 타입 B 및 C 보일러에 적용되며, 다양한 연료 가스를 사용하는 보일러를 포괄합니다. 운영 중 물의 온도가 105°C를 초과하거나 미만인 경우, 최대 수조 압력이 6바를 초과하지 않는 조건 등 다양한 운영 조건을 충족해야 합니다. 또한 특정 조건 하에서 응축을 유발할 수 있는 보일러를 포함하여, 설치 안내서에 “응축 보일러”, “저온 보일러”, “표준 보일러” 또는 “기타 보일러”로 명시된 경우의 요구 사항도 포함되어 있습니다. 이 표준의 강점은 보일러의 설치를 위해 설계된 밀폐 수조 시스템 또는 개방 수조 시스템에 모두 적용될 수 있는 기술적 요구 사항을 포괄적으로 다룬다는 것입니다. 이를 통해 제조업체 및 설치업체는 보일러의 유형과 사용 조건에 따라 여러 상황에서 표준화된 성능 및 안전 요구 사항을 충족할 수 있습니다. 표준 EN 15502-1은 리스크 평가 방법론을 제공하여, 전통적인 구조 외에 대체 구조를 갖는 보일러의 안전성을 평가할 수 있는 체계를 마련하고 있습니다. 이러한 접근은 업계에서의 실제 적용에서 중요한 활용 가치를 지닙니다. 또한, 이 표준은 가스 그리드에 연결될 예정인 장비에 대해, 장비의 수명 동안 배포되는 가스의 품질에 큰 변동이 있을 것으로 예상되는 경우에는 적용되지 않도록 명확히 하고 있어, 사용자와 제조업체 모두에게 필요한 명확한 가이드라인을 제공합니다. 결론적으로, EN 15502-1:2021+A1:2023 표준은 가스 연료 보일러의 안전성과 효율성을 보장하기 위해 필요한 핵심 기준을 제시하며, 절차 및 성능 요구 사항을 체계적으로 정리하여 업계의 안전성을 제고하고 있습니다.
SIST EN 15502-1:2022+A1:2024は、ガス燃焼暖房ボイラーに関する欧州標準であり、その範囲はガスを燃料とする中央暖房ボイラーの一般要件と試験方法を規定しています。この標準は、大気式燃焼器、ファンアシスト型大気式燃焼器、あるいは完全混合型燃焼器を装備したボイラーに適用され、ボイラーの分類、表示、エネルギーラベリングに関する詳細なガイドラインを提供します。 この標準の強みとして、まず、異なるガスファミリーで動作するボイラーに関する共通要件を定めている点が挙げられます。これにより、さまざまな燃料条件下でのボイラーの安全性や性能を一貫して評価することが可能です。また、ボイラーの動作温度が105℃以下または以上である場合や、最大運転圧力が6バールを超えない場合に関する明確な基準を設けており、設計者や製造者にとって重要な情報源となります。 さらに、この標準は、設置が建物内部または部分的に保護された場所で行われることを想定しているため、マッチングした使用環境に対する柔軟性を提供しています。また、温水の即時供給や蓄熱を行うボイラーにも適用されるため、幅広い製品に対してカバーできる点が評価されます。 エコデザイン指令やボイラー効率指令といった関連法規とも整合しており、標準ボイラー、低温ボイラー、凝縮ボイラーという分類が法的に明確化されています。これは、業界関係者にとって非常に重要な情報であり、製品開発や販売戦略に影響を与える要素となります。 最後に、この標準はリスク評価に基づく代替構造の評価方法を提供しており、安全性の向上と共に適切なガイドラインを示します。そのため、プレミックス燃焼器を含む多様なボイラー構造を持つ製品に対しても適用可能なフレームワークを提供しています。 全体として、SIST EN 15502-1:2022+A1:2024は、ガス燃焼暖房ボイラーに関する包括的な標準を提供しており、設計、製造、設置における安全性と効率性を確保するための重要な基準となります。
La norme EN 15502-1:2021+A1:2023 établit des exigences générales et des méthodes d'essai pour les chaudières à gaz destinées au chauffage central. Son domaine d'application est clair et bien défini, englobant les chaudières équipées de brûleurs atmosphériques, de brûleurs à air soufflé ou de brûleurs entièrement prémélangés. Cette norme s'applique spécifiquement aux chaudières de types B et C, et prend en compte différents types de gaz combustibles. L'une des forces majeures de cette norme réside dans sa capacité à définir des exigences communes, ainsi que des méthodes d'évaluation appropriées pour les appareils de chauffage à gaz. Le fait qu'elle couvre également la classification, le marquage et l'étiquetage énergétique renforce sa pertinence sur le marché, notamment dans le cadre de la transition énergétique et de la recherche d'efficacité énergétique. Le système de classification des chaudières, en intégrant des notions telles que "chaudière à condensation", "chaudière basse température" ou "chaudière standard", contribue à une meilleure compréhension des performances des équipements par les consommateurs. De plus, la mention des systèmes d'eau scellés et ouverts dans la norme indique une attention particulière à la diversité des installations possibles, ce qui élargit son champ d'application. L'inclusion d'un processus d'évaluation des risques pour les constructions alternatives constitue également un atout, car elle appelle à une vigilance accrue face à des conceptions qui ne seraient pas complètement couvertes par la norme. Cela démontre une flexibilité et une adaptabilité essentielles aux évolutions technologiques. En somme, la norme EN 15502-1:2021+A1:2023 s'avère d'une grande pertinence dans le contexte actuel de la régulation des chaudières à gaz. Elle offre un cadre rigoureux et détaillé pour garantir la sécurité, l'efficacité et la durabilité des chaudières, tout en répondant aux exigences des législations européennes sur la performance énergétique.
The EN 15502-1:2021+A1:2023 standard serves as a pivotal framework for the evaluation and classification of gas-fired central heating boilers. This European Standard establishes essential requirements and test methods applicable to boilers equipped with atmospheric burners, fan-assisted atmospheric burners, or fully premixed burners. Its comprehensive scope is crucial for ensuring the safety and efficiency of boilers categorized as types B and C. One of the standard's strengths lies in its meticulous definition of operational parameters, including the usage of various combustible gases at specified pressures, as outlined in EN 437. Furthermore, the standard accommodates different operational scenarios, addressing boilers operating at water temperatures below or above 105 °C and having a maximum water circuit pressure of 6 bar. This breadth of applicability ensures that it encompasses a wide range of heating solutions that may lead to condensation under specific conditions. The EN 15502-1 standard is rigorously structured, allowing for clear classification, marking, and energy labelling of boilers. By specifying that boilers must be clearly labeled as "condensing," "low temperature," "standard," or "other," it enhances market transparency, helping consumers make informed choices and encouraging compliance with the Ecodesign Directive and Boiler Efficiency Directive. Another noteworthy aspect is its relevance to both sealed and open water systems, significantly expanding its potential user base in the market. Additionally, the provisions for assessing alternative boiler constructions through risk assessment methodology highlight the standard's adaptability in the face of evolving industry needs and innovations. The exclusion of appliances intended for gas grids with highly variable gas quality, along with those designed for burning toxic gas components, indicates a responsible approach to safety and compatibility issues, thereby reinforcing the credibility of the standard. In conclusion, the EN 15502-1:2021+A1:2023 standard embodies a comprehensive and robust framework tailored for ensuring the quality, safety, and operational efficiency of gas-fired heating boilers. Its detailed specifications and methodologies provide critical guidance for manufacturers and users alike, ensuring that the boilers in question meet contemporary requirements for performance and safety.
Die Norm EN 15502-1:2021+A1:2023 gibt einen umfassenden Rahmen für gasbeheizte Heizkessel vor und definiert die allgemeinen Anforderungen sowie die Prüfmethoden. Die Relevanz dieser Norm erstreckt sich über eine Vielzahl von Aspekten, wobei insbesondere die Klassifizierung, das Markieren und das Energie-Labeling von Heizkesseln mit atmosphärischen Brennern, gebläseunterstützten atmosphärischen Brennern oder voll gemischten Brennern hervorgehoben wird. Ein zentraler Stärke der Norm ist ihre Vielseitigkeit, da sie für Heizkessel der Typen B und C gilt, die eine breite Palette an Konstruktionen und Einsatzmöglichkeiten abdecken. Die Anforderungen zielen dabei gleichermaßen auf Kessel, die mit verschiedenen Brenngasen betrieben werden, sowie auf solche, die unter unterschiedlichen Temperatur- und Druckbedingungen arbeiten. Diese umfassende Betrachtung ermöglicht eine klare Einstufung der Geräte hinsichtlich ihrer Nutzung und Betriebssicherheit. Die Norm betont auch die Notwendigkeit, spezifische Anforderungen für Kessel zu erfüllen, die als „Kondensationskessel“ oder „Niedertemperaturkessel“ deklariert sind. Dies ist besonders relevant im Kontext der energieeffizienten Heiztechnologien und der gesetzlichen Vorgaben wie der Ökodesign-Richtlinie, die für Anbieter und Hersteller entscheidend ist. Der Fokus auf die Vielfalt der Einsatzmöglichkeiten, sowohl in geschlossenen als auch in offenen Wassersystemen, ermöglicht es der Norm, den unterschiedlichen Bedürfnissen der Industrie gerecht zu werden. Zudem wird eine Risikoanalyse für alternative Kesselkonstruktionen bereitgestellt, was die Sicherheit und den Schutz der Verbraucher weiter erhöht. Schließlich ist zu beachten, dass diese Norm klar definiert, welche Geräte von den Anforderungen ausgeschlossen sind, z. B. solche, die an Gasnetze angeschlossen werden sollen, wo die Gasqualität erheblich schwanken kann. Dadurch wird sichergestellt, dass die Norm gezielt auf die entsprechenden Geräte anwendbar ist und Missverständnisse oder Fehlanwendungen vermieden werden. Insgesamt bietet die Norm EN 15502-1:2021+A1:2023 eine solide Basis für die Entwicklung, Prüfung und den sicheren Betrieb von gasbeheizten Heizkesseln, was ihre Relevanz für Hersteller und Betreiber im Kontext der aktuellen Energieeffizienzstandards unterstreicht.
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