SIST-TS CEN/TS 15502-3-1:2025

Gas-fired central heating boilers - Part 3-1: H2NG and ACCF - Expansion of EN 15502-2-1:2022

Scope of CEN/TS 15502-3-1
EN 15502-2-1:2022, Clause 1 applies with the following modifications:
Add after k):
l) which are fully premixed appliances equipped with an Adaptive Combustion Control Function (ACCF) 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 including gas grids for natural gases of the second family where up to 20% hydrogen volume is added to the natural gas (H2NG-Y20).
m) which are fully premixed appliances equipped with a Pneumatic Gas Air Ratio controller (PGAR) that are intended to be connected to gas grids for natural gases of the second family where up to 20% hydrogen volume is added to the natural gas (H2NG-Y20), where the quality of the distributed gas without adding the hydrogen is not likely to vary to a large extent over the lifetime of the appliance.
Replace ab) and ak) and al) by the following:
ab) 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 of EN 15502-1:2021), except for fully premixed appliances with a ACCF, as ACCF appliances are designed to adapt to variations in gas quality.
ak) appliances that are intended to burn natural gases of the second family where hydrogen is added to the natural gas, except for fully premixed appliances with a ACCF or PGAR (which are covered by this document);
al) Partially premixed appliances equipped with an adaptive combustion control function (ACCF).

Gasbefeuerte Zentralheizkessel - Teil 3-1: Wasserstoffbeimischung und adaptive Verbrennungsregelung - Ergänzung zur DIN EN 15502-2-1:2022

Der Anwendungsbereich muss EN 15502 2 1:2022, Abschnitt 1, mit den folgenden Änderungen entsprechen:
Am Ende der Liste, nach k), ist Folgendes hinzuzufügen:
„Dieses Dokument schließt gasbefeuerte Zentralheizungskessel der Bauarten C1 bis C(11) und der Bauarten B2, B3 und B5 ein“:
l)   die Geräte mit vollständiger Vormischung sind, ausgestattet mit einer adaptiven Verbrennungsregelungsfunktion (ACCF, en: adaptive combustion control function), die zum Anschluss an Gasnetze bestimmt sind, bei denen die Qualität des verteilten Gases über die Lebensdauer des Geräts wahrscheinlich stark schwankt, einschließlich Gasnetze für Erdgase der zweiten Familie, bei denen dem Erdgas bis zu 20 mol% H2 zugesetzt wird (H2NG-Y20).
m)   die Geräte mit vollständiger Vormischung sind, ausgestattet mit einer pneumatischen Gas/Luft-Verbundregelung (PGAR, en: Pneumatic Gas/Air Ratio controller), die zum Anschluss an Gasnetze für Erdgase der zweiten Familie bestimmt sind, bei denen dem Erdgas bis zu 20 mol% H2 zugesetzt wird (H2NG-Y20), bei denen die Qualität des zur Verteilung kommenden Gases ohne Wasserstoffbeimischung über die Lebensdauer des Geräts wahrscheinlich nicht stark schwankt.
Die folgende Liste wird ersetzt
„Dieses Dokument behandelt nicht alle Anforderungen an“:
ab) und ak) und al) durch:
ab)   Geräte, die dafür ausgelegt sind, an ein Gasnetz angeschlossen zu werden, in dem die Qualität des verteilten Gases über die Lebensdauer des Gerätes wahrscheinlich stark schwankt (siehe Anhang AB von EN 15502 1:2021), außer für Geräte mit vollständiger Vormischung mit einer ACCF, da ACCF-Geräte dafür ausgelegt sind, sich an Schwankungen der Gasqualität anzupassen.
ak)   Geräte, die für die Verbrennung von Erdgas der zweiten Familie bestimmt sind, wenn dem Erdgas Wasserstoff zugesetzt wird, außer für Geräte mit vollständiger Vormischung mit einer ACCF oder PGAR (die von diesem Dokument abgedeckt sind);
al)   Geräte mit teilweiser Vormischung, die mit einer adaptiven Verbrennungssteuerfunktion (ACCF) ausgestattet sind.

Chaudières de chauffage central utilisant les combustibles gazeux - Partie 3-1: H2/GN et fonction adaptative de contrôle de la combustion - Élargissement de l'EN 15502-2-1:2022

Doit être conforme à l'EN 15502 2 1:2022, Article 1, avec les modifications suivantes :
Ajouter le texte suivant à la fin de la liste, après le point k) :
« Le présent document s'applique aux chaudières des types C1 à C(11), et des types B2, B3 et B5 : »
l) qui sont des appareils à pré-mélange total équipés d'une fonction adaptative de contrôle de la combustion, 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, y compris au réseau de gaz utilisant des gaz naturels de la deuxième famille où jusqu'à 20 % mol de H2 sont ajoutés au gaz naturel (H2/GN-Y20) ;
m) qui sont des appareils à pré-mélange total équipés d'un dispositif pneumatique de régulation du rapport air/gaz, destinés à être raccordés au réseau de gaz utilisant des gaz naturels de la deuxième famille où jusqu'à 20 % mol de H2 sont ajoutés au gaz naturel (H2/GN-Y20), lorsque la qualité du gaz distribué sans ajout d'hydrogène n'est pas susceptible de varier de façon importante pendant la durée de vie de l'appareil.
Dans la liste qui suit le texte :
« Le présent document ne couvre pas toutes les exigences relatives »
remplacer ab), ak) et al) par le texte suivant :
ab) 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 l'Annexe AB de l'EN 15502 1:2021), sauf pour les appareils à pré-mélange total équipés d'une fonction adaptative de contrôle de la combustion, ces appareils étant conçus pour s'adapter aux variations de la qualité du gaz ;
ak) appareils à gaz destinés à brûler des gaz naturels de la seconde famille dans lesquels de l'hydrogène est ajouté au gaz naturel, sauf pour les appareils à pré-mélange total équipés d'une fonction adaptative de contrôle de la combustion ou d'un dispositif pneumatique de régulation du rapport air/gaz (lesquels sont couverts par le présent document) ;
al) appareils à pré-mélange partiel équipés d'une fonction adaptative de contrôle de la combustion.

Plinski kotli za centralno ogrevanje - 3-1. del: Zmesi H2/NG in funkcija prilagodljivega nadzora zgorevanja (ACCF) - Razširitev standarda EN 15502-2-1:2022

General Information

• Status: Not Published
• Public Enquiry End Date: 14-May-2024
• ICS: 27.060.30 - Boilers and heat exchangers
• ICS: 27.075 - Hydrogen technologies
• ICS: 91.140.10 - Central heating systems
• ICS: 97.100.20 - Gas heaters
• Technical Committee: PLN - Gas appliances for domestic use
• Current Stage: 5520 - Unique Acceptance Procedure (UAP) (Adopted Project)
• Start Date: 10-Jan-2024
• Due Date: 29-May-2024
• Completion Date: 04-Jun-2024
• Ref Project: CEN/TS 15502-3-1:2024 - Gas-fired central heating boilers - Part 3-1: H2NG and ACCF - Expansion of EN 15502-2-1:2022

Standards Content (Sample)

SLOVENSKI STANDARD
kSIST-TS FprCEN/TS 15502-3-1:2024
01-maj-2024
Plinski kotli za centralno ogrevanje - 3-1. del: Zmesi H2/NG in funkcija
prilagodljivega nadzora zgorevanja (ACCF) - Razširitev standarda EN 15502-2-
1:2022
Gas-fired central heating boilers - Part 3-1: H2NG and ACCF - Expansion of EN 15502-2
-1:2022
Gasbefeuerte Zentralheizkessel - Teil 3-1: Wasserstoffbeimischung und adaptive
Verbrennungsregelung - Ergänzung zur DIN EN 15502-2-1:2022
Chaudières de chauffage central utilisant les combustibles gazeux - Partie 3-1: H2/GN et
fonction adaptative de contrôle de la combustion - Élargissement de l'EN 15502-2-
1:2022
Ta slovenski standard je istoveten z: FprCEN/TS 15502-3-1
ICS:
91.140.10 Sistemi centralnega Central heating systems
ogrevanja
97.100.20 Plinski grelniki Gas heaters
kSIST-TS FprCEN/TS 15502-3-1:2024 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

kSIST-TS FprCEN/TS 15502-3-1:2024

kSIST-TS FprCEN/TS 15502-3-1:2024

FINAL DRAFT
TECHNICAL SPECIFICATION
FprCEN/TS 15502-3-1
SPÉCIFICATION TECHNIQUE
TECHNISCHE SPEZIFIKATION
December 2023
ICS 27.060.30; 27.075; 91.140.10
English Version
Gas-fired central heating boilers - Part 3-1: H2NG and
ACCF - Expansion of EN 15502-2-1:2022
Chaudières de chauffage central utilisant les Gasbefeuerte Zentralheizkessel - Teil 3-1:
combustibles gazeux - Partie 3-1: H2/GN et fonction Wasserstoffbeimischung und adaptive
adaptative de contrôle de la combustion - Verbrennungsregelung - Ergänzung zur DIN EN 15502-
Élargissement de l'EN 15502-2-1:2022 2-1:2022

This draft Technical Specification is submitted to CEN members for Vote. It has been drawn up by the Technical Committee
CEN/TC 109.
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.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.

Warning : This document is not a Technical Specification. It is distributed for review and comments. It is subject to change
without notice and shall not be referred to as a Technical Specification.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

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. FprCEN/TS 15502-3-1:2023 E
worldwide for CEN national Members.

kSIST-TS FprCEN/TS 15502-3-1:2024
FprCEN/TS 15502-3-1:2023 (E)
Contents Page
European foreword . 4
Introduction . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 8
3.1 Terms and definitions . 8
3.2 Symbols. 13
4 Classification . 13
4.1 Gases and categories . 13
5 Construction . 13
6 Electrical safety . 13
7 Controls . 14
8 Operational requirements . 14
8.1 General . 14
8.2 Hydraulic resistance . 14
8.3 Hydraulic resistance . 14
8.4 Heat inputs and heat outputs . 14
8.5 Limiting temperatures . 15
8.6 Ignition, cross lighting, flame stability . 15
8.7 Reduction of gas pressure. 18
8.8 Defective closure of the gas valve immediately upstream of the main burner . 18
8.9 Pre-purge . 18
8.10 Functioning of a permanent ignition burner when the fan stops during the standby
time . 19
8.11 Adjustment, control and safety device . 19
8.12 Carbon monoxide . 20
...................................................................................................................................................................... 26
8.13 NOx
8.14 Special provisions for boilers intended to be installed in a partially protected place . 26
8.15 Formation of condensate . 26
8.16 Temperature of combustion products . 26
8.17 Sound power level . 26
9 Useful efficiencies . 26
10 Electric auxiliary energy . 27
11 Risk assessment . 27
12 Marking and instructions . 27
12.1 Boiler marking . 27
12.2 Instructions . 27
12.3 Presentation . 29
kSIST-TS FprCEN/TS 15502-3-1:2024
FprCEN/TS 15502-3-1:2023 (E)
Annex YA (normative) Specification of the normal operating conditions and settings for
boilers having an ACCF . 30
Annex YB (informative) Example of detailed information in the technical documentation for
boilers having an ACCF . 34
Annex YC (informative) Considerations on the use of limit gases for fully premixed ACCF and
H2NG appliances . 38
Annex YD (informative) Methods for generating a slope change of the Wobbe index . 48
Annex YE (informative) Determination of the average CO level with an averaging time
interval of 60 min . 51
Annex YF (normative) Summary of the test conditions for fully premixed H2NG PGAR
appliances and H2NG ACCF appliances . 55
Bibliography . 58

kSIST-TS FprCEN/TS 15502-3-1:2024
FprCEN/TS 15502-3-1:2023 (E)
European foreword
This document (FprEN 15502-3-1:2023) has been prepared by Technical Committee CEN/TC 109
“Central heating boilers using gaseous fuels”, the secretariat of which is held by NEN.
This document is currently submitted to the Vote on TS.
This document contains an expansion of the scope of EN 15502-2-1:2022 and provides requirements
needed for this expansion.
The only technical change compared to EN 15502-2-1:2022 is this expansion of the scope compared to
EN 15502-2-1:2022.
EN 15502 consists of the following parts under the general title “Gas-fired heating boilers”:
— Part 1: General requirements and tests;
— 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.
— Part 3-1: H2NG and ACCF — Expansion of EN 15502-2-1:2022.
Relationship between this document, EN 15502-2-1:2022 and EN 15502-1:2021
The reader needs to be aware of the following information:
a) This document (CEN/TS 15502-3-1) is to be used in conjunction with EN 15502-2-1:2022, while
EN 15502-2-1:2022 is to be used in conjunction with EN 15502-1:2021. This means that this TS is to
be used in conjunction with both EN 15502-2-1:2022 and EN 15502-1:2021 and that all information
in EN 15502-2-1:2022 and EN 15502-1:2021 applies as well, unless stated otherwise (see under b)).
NOTE 1 To find the actual requirements or information in the (sub)clauses of EN 15502-2-1:2022 referred
to in this TS, one might need to check EN 15502-1:2021 (as EN 15502-2-1:2022 is to be used in conjunction
with EN 15502-1:2021).
b) The numbering structure of this TS is using the numbering structure of EN 15502-2-1:2022 and
expanding on it. Where this TS states: Shall be according to EN 15502-2-1:2022, [clause number],
The numbering, title and text of that clause is to be used (incl. sub clauses, tables, equations, figures,
lists and corresponding numbering).
NOTE 2 The TS and its annexes can refer to (sub)clause numbers that are to be found either in this TS, or
EN 15502-2-1:2022, or EN 15502-1:2021
c) The relevant text of EN 15502-2-1:2022 is to be adapted accordingly in all cases where this TS states:
— shall be according to EN 15502-2-1:2022, [clause number] with the following modification;
— shall be according to EN 15502-2-1:2022, [clause number] with the following modification of
[sub clause number(s)];
— shall be according to EN 15502-2-1:2022, [clause number] with the following addition;
kSIST-TS FprCEN/TS 15502-3-1:2024
FprCEN/TS 15502-3-1:2023 (E)
— shall be according to EN 15502-2-1:2022, [clause number] with the addition of [sub clause
number(s)] at the end;
— EN 15502-2-1:2022, [clause number] is replaced by the following;
— the title of EN 15502-2-1:2022 [clause number] is replaced by the following;
— EN 15502-2-1:2022, [clause number] is not applicable.
d) Clauses or subclauses in this TS that are additional to the structure of EN 15502-2-1:2022 are
numbered “20x” (e.g. 3.1.201, 8.4.201, Table 201, Formula 201, Figure 201) or designated as Annex
“Y” (e.g Annex YA, YB, YC, etc.). These additional (sub)clauses provide requirements and information
that is specific for the appliances that are covered in the scope of this TS.
NOTE 3 The additional (sub)clauses in this TS are not indicated as an addition to EN 15502-2-1:2022.
kSIST-TS FprCEN/TS 15502-3-1:2024
FprCEN/TS 15502-3-1:2023 (E)
Introduction
EN 15502-2-1:2022, introduction applies.
kSIST-TS FprCEN/TS 15502-3-1:2024
FprCEN/TS 15502-3-1:2023 (E)
1 Scope
Shall be according to EN 15502-2-1:2022, Clause 1 with the following modifications:
Add at the end of the list, after k), following:
“This document covers gas-fired central heating boilers from the types C up to C and the types B , B
1 (11) 2 3
and B5”:
l) which are fully
...