ISO/TC 86/SC 6/WG 1 - Air-source air-conditioners and heat pumps

This document specifies the standard conditions for capacity and efficiency ratings of non-ducted portable air-cooled air conditioners having a single exhaust duct and non-ducted portable air-cooled heat pumps having a single exhaust duct. Such air conditioners and heat pumps may include an evaporatively cooled condenser cooled by air and the evaporation of: a) condensate collected from the evaporator; b) external supplementary water stored in a supplementary water tank; or c) both a) and b). This document also specifies the test methods for determining the capacity and efficiency ratings. This document applies to equipment that is factory-made, electrically driven and uses mechanical compression. This document is applicable to equipment utilizing one or more refrigeration systems. This document is not applicable to the rating and testing of the following: i) Water-source heat pumps or water-cooled air conditioners; ii) Multi-split-system air conditioners and air-to-air heat pumps (see ISO 15042:2017 for the testing of such equipment); iii) Individual assemblies not constituting a complete refrigeration system; iv) Equipment using the absorption refrigeration cycle; v) Ducted equipment (see ISO 13253:2017 for the testing of such equipment); vi) Evaporative coolers or any other cooling systems that are not of the vapour compression type; vii) Dehumidifiers; viii) Spot coolers.

ISO 5151:2017 specifies 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 5151:2017 is applicable to the following equipment: - non-ducted air-cooled air conditioners and non-ducted air-to-air heat pumps; or - ducted air conditioners and/or ducted heat pumps rated at less than 8 kW and intended to operate at an external static pressure of less than 25 Pa. ISO 5151:2017 is limited to: - residential, commercial and industrial single-package and split-system air conditioners and heat pumps; - factory-made, electrically driven and use mechanical compression; - utilizing single, multiple and variable capacity components; - multiple split-system utilizing one or more refrigeration systems, one outdoor unit and one or more indoor units, controlled by a single thermostat/controller. The requirements of testing and rating contained in this document are based on the use of matched assemblies. ISO 5151:2017 is not applicable to the rating and testing of the following: a) water-source heat pumps or water cooled air conditioners; b) multi-split-system air conditioners and air-to-air heat pumps (follow ISO 15042 for the testing of such equipment); c) mobile (windowless) units having a condenser exhaust duct; d) individual assemblies not constituting a complete refrigeration system; e) equipment using the absorption refrigeration cycle; f) ducted equipment except for those specified in this clause (follow ISO 13253 for the testing of such equipment). ISO 5151:2017 does not cover the determination of seasonal efficiencies, 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 "air conditioners" and/or "heat pumps".

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".

ISO 13253:2017 specifies 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 13253:2017 is applicable to the following equipment: - ducted air-cooled air conditioners and ducted air to air heat pumps. ISO 13253:2017 is limited to - residential, commercial and industrial single-package, and split-system air conditioners and heat pumps, - factory-made, electrically driven and use mechanical compression, - utilizing single, multiple and variable capacity components, and - multiple split-system utilizing one or more refrigeration systems, one outdoor unit and one or more indoor units, controlled by a single thermostat/controller. The requirements of testing and rating contained in this document are based on the use of matched assemblies. ISO 13253:2017 is not applicable to the rating and testing of the following: a) water-source heat pumps or water-cooled air-conditioners; b) multi-split-system air-conditioners and air-to-air heat pumps (see ISO 15042 for testing of such equipment); c) mobile (windowless) units having a condenser exhaust duct; d) individual assemblies not constituting a complete refrigeration system; e) equipment using the absorption refrigeration cycle; f) non-ducted equipment (see ISO 5151 for testing of such equipment); g) 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). ISO 13253:2017 does not cover the determination of seasonal efficiencies, 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 "air-conditioners" and/or "heat pumps".

ISO 16358-3:2013 specifies the testing and calculating methods for seasonal performance factor of equipment covered by ISO 5151, ISO 13253 and ISO 15042. ISO 16358-3:2013 also specifies the seasonal performance test conditions and the corresponding test procedures for determining the seasonal performance factor of equipment, as specified above, under mandatory test conditions and is intended for use only in marking, comparison, and certification purposes. ISO 16358-3:2013 does not apply to the testing and rating of: water-source heat pumps or water-cooled air conditioners; portable units having a condenser exhaust duct; individual assemblies not constituting a complete refrigeration system; or equipment using the absorption refrigeration cycle.

ISO 16358-1:2013 specifies the testing and calculating methods for seasonal performance factor of equipment covered by ISO 5151, ISO 13253 and ISO 15042. ISO 16358-1:2013 also specifies the seasonal performance test conditions and the corresponding test procedures for determining the seasonal performance factor of equipment, as specified above, under mandatory test conditions and is intended for use only in marking, comparison, and certification purposes. For the purposes of ISO 16358-1:2013, the rating conditions are those specified under T1 in the reference standards above. The procedures in ISO 16358-1:2013 may be used for other temperature conditions. ISO 16358-1:2013 does not apply to the testing and rating of: water-source heat pumps or water-cooled air conditioners; portable units having a condenser exhaust duct; individual assemblies not constituting a complete refrigeration system; or equipment using the absorption refrigeration cycle.

ISO 16358-2:2013 specifies the testing and calculating methods for seasonal performance factor of equipment covered by ISO 5151, ISO 13253 and ISO 15042. For the purposes of ISO 16358-2:2013, it is assumed that any make-up heating will be provided by electric heaters running concurrently with the heat pump. ISO 16358-2:2013 also specifies the seasonal performance test conditions and the corresponding test procedures for determining the seasonal performance factor of equipment, as specified above, under mandatory test conditions and is intended for use only in marking, comparison, and certification purposes. ISO 16358-2:2013 does not apply to the testing and rating of: water-source heat pumps or water-cooled air conditioners; portable units having a condenser exhaust duct; individual assemblies not constituting a complete refrigeration system; or equipment using the absorption refrigeration cycle.

ISO/TS 16491:2012 gives guidance on the practical applications of the principles of performance measurement of air-cooled air-conditioners and air-to-air heat pumps as described in ISO 5151, ISO 13253, and ISO 15042.