I.S. EN 15502-1:2021

European foreword
Introduction
1 Scope
2 Normative references
3 Terms, definitions and symbols
4 Classification
5 Construction
6 Electrical and electromagnetic safety
7 Controls
8 Operational requirements
9 Useful efficiencies
10 Electric auxiliary energy
11 Risk assessment
12 Marking and instructions
Annex A (normative) Properties of carbon and stainless steels
Annex B (normative) Minimum requirements for cast iron
Annex C (normative) Parts in aluminium and aluminium alloys
Annex D (normative) Parts in copper or copper alloys
Annex E (normative) Minimum thicknesses for rolled parts
Annex F (normative) Nominal minimum thicknesses of boiler sections of cast materials under
water pressure
Annex G (normative) Parameters for welded joints and welding processes
Annex H (informative) Examples of the composition of the gas circuit according to 57
Annex I (informative) Compilation of the test conditions for the various gas families
Annex J (normative) Calculation of conversions of NOx
Annex K (informative) Example of calculation of the weighting factors NOx
Annex L (informative) Practical method of calibrating the test rig to enable the heat loss Dp to be
determined
Annex M (informative) Means of determining the ignition time at full rate
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
Annex O (informative) Example of a risk assessment method
Annex P (informative) Examples of risk assessment with a method described in Annex O165
Annex Q (informative) Realisation of a protective measure
Annex R (informative) Overall classification of a basic risk
Annex S (informative) Not exhaustive list of classification examples
Annex T (normative) Correction for the determined efficiency in the low water temperature test
of low temperature boilers (LTB) and condensing boilers (CB)
Annex U (normative) Use of test gases
Annex V (informative) Alternative method for heat output as enthalpy difference
Annex AA (informative) Product Information related to Eco-design Regulation and Labelling
Regulation
Annex AB (informative) Variations in gas quality
Annex AC (normative) Non-exhaustive list of materials used in contact with drinking water 193
Annex ZA (informative) Left empty on purpose
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
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 197
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
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
Bibliography

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”.