ISO 15042:2017规定了用于确定风冷空调和空气对空气热泵的容量和效率额定值的性能测试、标准条件和测试方法。 ISO 15042:2017适用于以下设备: -―基本多分系统、模块化多分系统和模块化热回收多分系统。这些多分体式系统包括带有非管道和/或管道式室内机（带整体风扇）的空对空系统和不带风扇的室内机。 ISO 15042:2017仅限于: -住宅、商业和工业分体式空调和热泵； -工厂制造，电动，使用机械压缩； -单回路和多回路分流系统，使用一台或多台压缩机，对室外机的控制不超过两步； 或 -带有单个制冷回路的分体式系统，利用一个或多个变速压缩机或替代压缩机组合，通过三个或更多步骤改变系统的容量。 这些分体式系统设计为与一台或多台室外机和两台或多台为单独运行而设计的室内机组合运行，此类模块化系统能够将回收的热量从一台或多台室内机转移到同一系统中的其他机构。 本文件中包含的测试和评级要求基于匹配组件的使用。 ISO 15042:2017不适用于以下各项的评级和测试: a） 水冷或水源设备； b） 带有冷凝器排气管的移动式（单管道）装置； c） 不构成完整制冷系统的单个组件； d） 采用吸收式制冷循环的设备。 e） 管道式空调和/或管道式热泵，额定功率小于8 kW，拟在小于25 Pa的外部静压下运行，由一个恒温器/控制器控制（参考ISO 5151）； f） 采用一个或多个制冷系统、一台室外机和一台或多台室内机的多联机系统，由一个恒温器/控制器控制（参考ISO 5151或ISO 13253）。 ISO 15042:2017不包括季节性效率或季节性部分负载性能的测定，这在一些国家可能是必需的，因为它们在实际操作条件下提供了更好的效率指示。 注:在本文件中，“设备”和“系统”是指“多联机空调器”和/或“多联机热泵”。

ISO 15042:2017 specifies the performance testing, the standard conditions and the test methods for determining the capacity and efficiency ratings of air-cooled air conditioners and air-to-air heat pumps. ISO 15042:2017 is applicable to the following equipment: -― basic multi-split systems, modular multi-split systems and modular heat recovery multi-split systems. These multi-split systems include air-to-air systems with non-ducted and/or ducted indoor units with integral fans and indoor units supplied without fans. ISO 15042:2017 is limited to: - residential, commercial and industrial split-system air conditioners and heat pumps; - factory-made, electrically driven and use mechanical compression; - single- and multiple-circuit split-systems which utilize one or more compressors with no more than two steps of control of the outdoor unit; or - split-systems with a single refrigeration circuit which utilize one or more variable-speed compressors or alternative compressor combinations for varying the capacity of the system by three or more steps. These split-systems are designed to operate with a combination of one or more outdoor units and two or more indoor units designed for individual operation, and such modular systems are capable of transferring recovered heat from one or more indoor units to other units in the same system. The requirements of testing and rating contained in this document are based on the use of matched assemblies. ISO 15042:2017 is not applicable to the rating and testing of the following: a) water-cooled or water source equipment; b) mobile (single-duct) units having a condenser exhaust duct; c) individual assemblies not constituting a complete refrigeration system; d) equipment using the absorption refrigeration cycle. e) ducted air conditioners and/or ducted heat pumps, rated at less than 8 kW and intended to operate at external static pressures of less than 25 Pa, controlled by a single thermostat/controller (refer to ISO 5151); f) multiple split-system utilizing one or more refrigeration systems, one outdoor unit and one or more indoor units, controlled by a single thermostat/controller (refer to ISO 5151 or ISO 13253). ISO 15042:2017 does not cover the determination of seasonal efficiencies or seasonal part-load performances, which can be required in some countries because they provide a better indication of efficiency under actual operating conditions. NOTE Throughout this document, the terms "equipment" and "systems" mean "multi-split air conditioners" and/or "multi-split heat pumps".