ISO 15042:2017
(Main)Multiple split-system air conditioners and air-to-air heat pumps — Testing and rating for performance
Multiple split-system air conditioners and air-to-air heat pumps — Testing and rating for performance
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".
Climatiseurs et pompes à chaleur air/air multi-split — Essais et détermination des caractéristiques de performance
General Information
Relations
Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 15042
Second edition
2017-07
Multiple split-system air conditioners
and air-to-air heat pumps — Testing
and rating for performance
Climatiseurs et pompes à chaleur air/air multi-split — Essais et
détermination des caractéristiques de performance
Reference number
©
ISO 2017
© ISO 2017, Published in Switzerland
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
ISO copyright office
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2017 – All rights reserved
Contents Page
Foreword .vi
1 Scope . 1
2 Normative references . 2
3 Terms and definitions . 2
4 Symbols . 5
5 Airflow setting . 8
5.1 General . 8
5.2 Airflow setting for ducted indoor units . 8
5.2.1 General. 8
5.2.2 Airflow setting procedure for ducted indoor units . 8
5.3 ESP for rating . 8
5.4 Airflow setting for non-ducted indoor units measured by air enthalpy method .10
5.5 Outdoor airflow .10
5.6 Unit supplied without indoor fan.10
6 Cooling tests .10
6.1 Cooling capacity test .10
6.1.1 General conditions .10
6.1.2 Temperature conditions .11
6.1.3 Test conditions.12
6.2 Maximum cooling performance test.13
6.2.1 General conditions .13
6.2.2 Temperature conditions .13
6.2.3 Airflow conditions .13
6.2.4 Test conditions.13
6.2.5 Performance requirements .13
6.3 Minimum cooling test .15
6.3.1 General conditions .15
6.3.2 Temperature conditions .15
6.3.3 Airflow conditions .15
6.3.4 Test condition .15
6.3.5 Performance requirements .16
6.4 Freeze-up drip test (applies to non-ducted multi-splits) .16
6.4.1 General conditions .16
6.4.2 Temperature conditions .16
6.4.3 Airflow conditions .16
6.4.4 Test conditions.17
6.4.5 Performance requirements .17
6.5 Condensate control test and enclosure sweat test .17
6.5.1 General conditions .17
6.5.2 Temperature conditions .17
6.5.3 Airflow conditions .17
6.5.4 Test conditions.18
6.5.5 Performance requirements .18
7 Heating tests.18
7.1 Heating capacity tests .18
7.1.1 General conditions .18
7.1.2 Temperature conditions .19
7.1.3 Airflow conditions .20
7.1.4 Defrost operation .20
7.1.5 Test procedure — General .21
7.1.6 Preconditioning period .21
7.1.7 Equilibrium period . . .21
7.1.8 Data collection period .21
7.1.9 Test procedure when a defrost cycle (whether automatically or manually
initiated) ends the preconditioning period (7.1.6) .22
7.1.10 Test procedure when a defrost cycle does not end the preconditioning
period (7.1.6) .22
7.1.11 Test procedure for transient tests .23
7.1.12 Heating capacity test results . .24
7.2 Maximum heating performance test .24
7.2.1 General conditions .24
7.2.2 Temperature conditions .24
7.2.3 Airflow conditions .25
7.2.4 Test conditions.25
7.2.5 Performance requirements .25
7.3 Minimum heating performance test .25
7.3.1 General conditions .25
7.3.2 Temperature conditions .25
7.3.3 Airflow conditions .26
7.3.4 Test conditions.26
7.3.5 Performance requirements .26
7.4 Automatic defrost performance test .26
7.4.1 General conditions .26
7.4.2 Temperature conditions .27
7.4.3 Airflow conditions .27
7.4.4 Test conditions.27
7.4.5 Performance requirements .27
8 Heat recovery test .
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.