本欧洲标准规定了与装有大气燃烧器、风机辅助大气燃烧器的燃气集中供热锅炉的分类和标记有关的要求和试验方法，以下称为“锅炉”。 如果使用“锅炉”一词，则应理解为锅炉，包括其连接管道、管道和端子（如有）。 本文件将与FprEN 15502-1:2021一起使用 本欧洲标准涵盖B11、B11BS、B12、B12BS、B13、B13BS型燃气集中供热锅炉: 注:有关设备类型的更多背景信息，请参见EN 1749:2020 a） 标称热输入（基于净热值）不超过70 kW； b） 在EN 437:2018规定的压力下使用三种气体族中的一种或多种可燃气体； c） 在正常运行期间，传热流体的温度不超过105°c； d） 水回路中的最大工作压力不超过6巴； e） 技术说明中声明为“低温锅炉”或“标准锅炉”。如果未给出声明，则锅炉将被视为“标准锅炉”； f） 拟安装在建筑物内部或部分受保护的地方； g） 其目的是通过瞬时或储存原理，作为一个单独的单元来生产热水。 h） 设计用于密封水系统或开放水系统。 对于PED范围内的应用，可能需要进一步的要求（例如，最大允许温度超过110°C的情况，或体积乘以最大允许压力超过50 bar x l的情况）。 注:本标准规定了已知结构锅炉的要求。对于本标准可能未完全涵盖的具有任何替代结构的锅炉，需要评估与该替代结构相关的风险。 第11条给出了基于风险评估的评估方法示例。 本标准未涵盖以下各项的所有要求: i） 拟连接至天然气管网的装置，在该装置的使用寿命内，分布气体的质量可能会发生很大变化（见附录AB）； j） 使用烟道挡板的器具； k） 标称热输入（基于净热值）超过70 kW的器具； l） A、B14、B2、B3、B4、B5和C类器具； m） 拟连接到具有机械抽气的（公共）烟道的设备； n） 具有气体/空气比率控制的器具； o） 模块化锅炉； p） 在某些情况下会产生冷凝的锅炉； q） 拟安装在相对于烟道系统压力具有可预见负压的房间内的锅炉； r） 儿童和老年人专用外部部件的表面温度； s） 用于燃烧第二类天然气的装置，其中在天然气中添加氢气； t） 锅炉拟安装在老人和儿童可进入的区域。 注:例如，与烟道系统中的压力相关的负压可由密闭建筑中的机械或热通风引起。

This European Standard specifies, the requirements and test methods concerning the classification and marking of gas-fired central heating boilers that are fitted with atmospheric burners, fan assisted atmospheric burners and are hereafter referred to as 'boilers'. Where the word boiler is used, this is to be read as the boiler including its connecting ducts, ducts and terminals, if any. This document is to be used in conjunction with FprEN 15502-1:2021 This European Standard covers gas-fired central heating boilers type B11, B11BS, B12, B12BS, B13, B13BS: NOTE For further background information on appliance types see EN 1749:2020 a) that have a nominal heat input (on the basis of net calorific value) not exceeding 70 kW; b) that use one or more combustible gases of the three gas families at the pressures stated in EN 437:2018; c) where the temperature of the heat transfer fluid does not exceed 105 °C during normal operation; d) where the maximum operating pressure in the water circuit does not exceed 6 bar; e) which are declared in the technical instructions to be either a 'low temperature boiler' or a 'standard boiler'. If no declaration is given the boiler is to be considered a 'standard 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. h) which are designed for either sealed water systems or for open water systems. For applications within the scope of the PED further requirements may be necessary (e.g. situations where the maximum allowable temperature exceeds 110 °C, or where volume times maximum allowable pressure is over 50 bar x litres). NOTE This standard provides requirements for boilers with known constructions. For boilers with any alternative constructions, which might not fully be covered by this standard, the risk associated with this alternative construction needs to be assessed. An example of an assessment methodology, based upon risk assessment, is given in Clause 11. This standard does not cover all the requirements for: i) 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); j) appliances using flue dampers; k) appliances that have a nominal heat input (on the basis of net calorific value) exceeding 70 kW; l) appliances of the types A, B14, B2, B3, B4, B5 and C; m) appliances intended to be connected to a (common) flue having mechanical extraction; n) appliances with gas/air ratio control; o) modular boilers; p) boilers which can give rise to condensation under certain circumstances; q) boilers intended to be installed in a room with a foreseeable negative pressure relative to the pressure in the flue system; r) surface temperatures of external parts particular to children and elderly people; s) appliances that are intended to burn natural gases of the second family where hydrogen is added to the natural gass; t) boilers intended to be installed in areas accessible to elderly people and children. NOTE Negative pressure relative to the pressure in the flue system can for example be caused by mechanical or thermal ventilation in airtight buildings.