本欧洲标准规定了人身和财产安全的要求，提供了环境保护指南，并规定 制冷系统的操作、维护和修理以及制冷剂回收的程序。 “制冷系统”一词 欧洲标准包括热泵。 EN 378的本部分规定了适用于制冷系统的分类和选择标准。这些 第2、3和4部分使用了分类和选择标准。 本标准适用于: a） 至各种尺寸的固定或移动式制冷系统 特定产品标准（如ISO 13043）所涵盖的车辆空调系统除外； b） 二次冷却或加热系统； c） 去那个地方 制冷系统； d） 在采用本标准后，如果功能和容量不相同，更换部件和增加部件； 本标准不包括使用本欧洲标准附录E中所列制冷剂的系统。 附录C规定了如何确定 给定空间中允许的制冷剂量，超过该量时，需要采取额外的保护措施来降低风险。 附录E规定了标准 针对制冷和空调中使用的不同制冷剂的安全和环境考虑。 本标准不适用于制冷 在其作为欧洲标准出版之日之前制造的系统和热泵，系统的扩展和修改除外 出版后实施。 本标准适用于新的制冷系统、现有系统的扩展或改造， 对于现有固定系统，转移到另一地点并在另一地点运行。 本标准的转换也适用于本标准的情况 对于另一种制冷剂类型，在这种情况下，应评估是否符合本标准第1部分至第4部分的相关条款。 产品系列标准 处理制冷系统的安全问题优先于涵盖同一主题的水平和通用标准。

This European Standard specifies the requirements for the safety of persons and property, provides guidance for the protection of the environment and establishes procedures for the operation, maintenance and repair of refrigerating systems and the recovery of refrigerants. The term “refrigerating system” used in this European Standard includes heat pumps. This part of EN 378 specifies the classification and selection criteria applicable to refrigerating systems. These classification and selection criteria are used in parts 2, 3 and 4. This standard applies: a) to refrigerating systems, stationary or mobile, of all sizes except to vehicle air conditioning systems covered by a specific product standard e.g. ISO 13043; b) to secondary cooling or heating systems; c) to the location of the refrigerating systems; d) to replaced parts and added components after adoption of this standard if they are not identical in function and in the capacity; Systems using refrigerants other than those listed in Annex E of this European Standard are not covered by this standard. Annex C specifies how to determine the amount of refrigerant permitted in a given space, which when exceeded, requires additional protective measures to reduce the risk. Annex E specifies criteria for safety and environmental considerations of different refrigerants used in refrigeration and air conditioning. This standard is not applicable to refrigerating systems and heat pumps which were manufactured before the date of its publication as a European Standard except for extensions and modifications to the system which were implemented after publication. This standard is applicable to new refrigerating systems, extensions or modifications of already existing systems, and for existing stationary systems, being transferred to and operated on another site. This standard also applies in the case of the conversion of a system to another refrigerant type, in which case conformity to the relevant clauses of parts 1 to 4 of the standard shall be assessed. Product family standards dealing with the safety of refrigerating systems takes precedence over horizontal and generic standards covering the same subject.