IEC 60335-2-40:2024涉及电动热泵、卫生热水热泵和空调的安全性，包括电动压缩机以及循环风机盘管装置、除湿机（带或不带电动压缩机）、热电热泵和部分装置，单相电器的最大额定电压不超过300 V，其他电器（包括直流（DC）供电电器和电池供电电器）的最大额定电压不超过600 V。 不打算用于正常家庭使用但可能对公众造成危险的电器，如打算供非专业人员在商店、轻工业和农场使用的电器，属于本标准的范围。 上面提到的器具可以由一个或多个工厂制造的组件组成。如果在多于一个组件中提供，则单独的组件一起使用，并且要求基于匹配组件的使用。 IEC 60335-2-34中给出了“马达-压缩机”的定义，其包括术语马达-压缩机用于指定密封马达-压缩机或半密封马达-压缩机的陈述。 此外，IEC 60335-2-21还涵盖了用于储存卫生热水热泵中包含的热水的容器的要求。 本标准不考虑ISO 817定义的A1、A2L、A2和A3组以外的制冷剂。易燃制冷剂限于基于ISO 817中规定的WCF（最差情况配方）的摩尔质量大于或等于42kg/kmol的制冷剂。 在切实可行的范围内，本标准涉及设备在正常使用中遇到的常见危险，并假定安装、维修、退役和处置都得到了安全处理d由合格人员进行，并避免制冷剂的意外释放。然而，它没有具体说明在安装、维修和处置过程中确保人员能力的标准。本标准未规定处置过程中的安全要求。 附录HH提供了有关人员能力的信息要求。用于认证计划的人员能力标准可在ISO 22712中找到。 除非本标准（包括附件）涵盖了规格，否则制冷安全要求涵盖在: -ISO 5149-1:20 14、ISO 5149-1:20 4/AMD1:2015和ISO 5149-1:20 4/AMD2:2021， -ISO 5149-2:20 14和ISO 5149-2:20 4/AMD1:2020， -ISO 5149-3:20 14和ISO 5149-3:20 14/AMD1:2021。 辅助加热器或其单独安装的规定在本标准的范围内，但仅限于设计为设备组件一部分的加热器，控制器包含在设备中。提请注意以下事实: -对于拟用于车辆或船上或飞机上的器具，可能需要附加要求； -在许多国家，例如，负责劳工保护的国家卫生当局和负责储存、运输、建筑和装置的国家当局规定了额外的要求。 本标准不适用于 -用于加热和冷却设备的加湿器（IEC 60335-2-88）； -专为工业加工而设计的器具； -拟在存在特殊条件的场所使用的器具，例如存在腐蚀性或爆炸性环境（灰尘、蒸汽或气体）。 这第八版取消并取代了2022年出版的第七版。本版构成技术修订版。 与上一版相比，此版本包括以下重大技术变更: a)第12条:第1部分第12条已适用； b)第19条:增加了双壁热交换器抗冻的要求； c)条款20:修改了何时应用测试探针18的要求； d)条款21:增加了双壁热交换器在其中一个壁失效时抵抗制冷剂压力的要求； e)第22条:修改要求，以反映设备可以连续运行，并且可以远程操作而不会引起危险，并增加了要求建造双壁热交换器以避免制冷剂泄漏到二次回路中； f）附件II已被删除并替换为IEC TS 63542的参考:2024. 本第2部分应与最新版本的IEC 60335-1及其修订一起使用，除非该版本排除了本第2部分；在这种情况下，使用不排除它的最新版本。它是在该标准第六版（2020年）的基础上建立的。

IEC 60335-2-40:2024 deals with the safety of electric heat pumps, sanitary hot water heat pumps and air conditioners, incorporating motor-compressors as well as hydronic fan coils units, dehumidifiers (with or without motor-compressors), thermoelectric heat pumps and partial units, their maximum rated voltage being not more than 300 V for single phase appliances and 600 V for other appliances including direct current (DC) supplied appliances and battery-operated appliances.
Appliances not intended for normal household use but which nevertheless can be a source of danger to the public, such as appliances intended to be used by laypersons in shops, in light industry and on farms, are within the scope of this standard.
The appliances referenced above can consist of one or more factory-made assemblies. If provided in more than one assembly, the separate assemblies are used together, and the requirements are based on the use of matched assemblies.
A definition of ‘motor-compressor’ is given in IEC 60335-2-34, which includes the statement that the term motor-compressor is used to designate either a hermetic motor-compressor or semi-hermetic motor-compressor.
Requirements for containers intended for storage of the heated water included in sanitary hot water heat pumps are, in addition, covered by IEC 60335-2-21.
This standard does not take into account refrigerants other than group A1, A2L, A2 and A3 as defined by ISO 817. Flammable refrigerants are limited to those of a molar mass of more than or equal to 42 kg/kmol based on WCF (worst case formulation) as specified in ISO 817.
As far as practical, this standard deals with common hazards presented by appliances that are encountered in normal use and assumes that installation, servicing, decommissioning, and disposal are safely handled by competent persons and accidental release of refrigerants is avoided. However, it does not specify the criteria to ensure competence of persons during installation, servicing and disposal. Safety requirements during disposal are not specified in this standard.
Annex HH provides informative requirements on competence of personnel. Criteria for competence of personnel for the purpose of certification schemes can be found in ISO 22712.
Unless specifications are covered by this standard, including the annexes, requirements for refrigerating safety are covered by:
– ISO 5149-1:2014, ISO 5149-1:2014/AMD1:2015, and ISO 5149-1:2014/AMD2:2021,
– ISO 5149-2:2014 and ISO 5149-2:2014/AMD1:2020,
– ISO 5149-3:2014 and ISO 5149-3:2014/AMD1:2021.
Supplementary heaters, or a provision for their separate installation, are within the scope of this standard, but only heaters which are designed as a part of the appliance package, the controls being incorporated in the appliance.
Attention is drawn to the fact that
– for appliances intended to be used in vehicles or on-board ships or aircraft, additional requirements can be necessary;
– in many countries, additional requirements are specified, for example, by the national health authorities responsible for the protection of labour and the national authorities responsible for storage, transportation, building constructions and installations.
This standard does not apply to
– humidifiers intended for use with heating and cooling equipment (IEC 60335-2-88);
– appliances designed exclusively for industrial processing;
– appliances intended to be used in locations where special conditions prevail, such as the presence of a corrosive or explosive atmosphere (dust, vapour or gas).
This eighth edition cancels and replaces the seventh edition published in 2022. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) Clause 12 : Part 1, Clause 12 has been made applicable;
b) Clause 19: requirement added for double wall heat exchangers to be resistant against freezing;
c) Clause 20: requirement modified for when to apply test probe 18;
d) Clause 21: requirement added for double wall heat exchangers to resistant against the pressure of the refrigerant if one of the walls fails;
e) Clause 22: requirement modified to reflect that appliances can operate continuously and can be operated remotely without giving rise to a hazard, and requirement added for double wall heat exchangers to be constructed to avoid refrigerant leaking into the secondary circuit;
f) Annex LL has been deleted and replaced by a reference to IEC TS 63542:2024.
This part 2 is to be used in conjunction with the latest edition of IEC 60335-1 and its amendments unless that edition precludes it; in that case, the latest edition that does not preclude it is used. It was established on the basis of the sixth edition (2020) of that standard.