IEC 63159-2-2:2021

Household electric instantaneous water heaters - Methods for measuring the performance - Part 2-2: Efficiency of single point of use electric instantaneous water heaters

IEC 63159-2-2:2021 This document applies to open outlet, single point-of-use, electric instantaneous water heaters intended for household or similar use, for showering purposes without downstream mixing.
This document only specifies tests for the assessment of energy efficiency.
This document does not apply to electrical instantaneous water heaters covered by other parts of this series of standards.
This International Standard is to be used in conjunction with IEC 63159-1:2021.

Chauffe-eau instantanés électrodomestiques - Méthodes de mesure de l’aptitude à la fonction - Partie 2-2: Rendement des chauffe-eau instantanés électriques à un seul point d'utilisation

L'IEC 63159-2-2:2021 s'applique aux chauffe-eau instantanés électriques à écoulement libre et à un seul point d'utilisation destinés à un usage domestique ou analogue, pour les besoins des douches sans mélange aval.
Le présent document spécifie uniquement les essais pour l'évaluation du rendement énergétique.
Le présent document ne s'applique pas aux chauffe-eau instantanés électriques couverts par d'autres parties de cette série de normes.
La présente Norme internationale doit être utilisée conjointement avec l'IEC 63159-1:2021.

General Information

• Status: Published
• Publication Date: 20-Oct-2021
• ICS: 91.140.65 - Water heating equipment
• Technical Committee: SC 59C - Electrical heating appliances for household and similar purposes
• Current Stage: PPUB - Publication issued
• Completion Date: 21-Oct-2021

Standards Content (Sample)

IEC 63159-2-2
Edition 1.0 2021-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Household electric instantaneous water heaters – Methods for measuring the
performance –
Part 2-2: Efficiency of single point of use electric instantaneous water heaters
Chauffe-eau instantanés électrodomestiques – Méthodes de mesure de
l'aptitude à la fonction –
Partie 2-2: Rendement des chauffe-eau instantanés électriques à un seul point
d'utilisation
IEC 63159-2-2:2021-10(en-fr)
---------------------- Page: 1 ----------------------
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---------------------- Page: 2 ----------------------
IEC 63159-2-2
Edition 1.0 2021-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Household electric instantaneous water heaters – Methods for measuring the
performance –

Part 2-2: Efficiency of single point of use electric instantaneous water heaters

Chauffe-eau instantanés électrodomestiques – Méthodes de mesure de
l'aptitude à la fonction –
Partie 2-2: Rendement des chauffe-eau instantanés électriques à un seul point
d'utilisation
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 91.140.65 ISBN 978-2-8322-1040-7

Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 3 ----------------------
– 2 – IEC 63159-2-2:2021 © IEC 2021
CONTENTS

FOREWORD ........................................................................................................................... 3

1 Scope .............................................................................................................................. 5

2 Normative references ...................................................................................................... 5

3 Terms and definitions ...................................................................................................... 5

4 General test conditions .................................................................................................... 5

4.3 General conditions ..................................................................................................... 5

4.3.101 Pressure, temperature, flow, and power conditions .............................................. 5

4.4 Test setup .................................................................................................................. 6

5 Energy efficiency ............................................................................................................. 6

5.1 Test method ............................................................................................................ 6

5.1.1 General ................................................................................................................... 6

5.1.1.101 Setpoints .......................................................................................................... 6

5.1.2 Static efficiency ....................................................................................................... 6

5.1.3 Start up losses ........................................................................................................ 6

5.2.2 Daily energy demand .............................................................................................. 6

Annex A (normative) Load pattern .......................................................................................... 7

Annex B (normative) Test setup ............................................................................................. 8

Bibliography .......................................................................................................................... 11

Figure B.1 – Test setup for open-outlet instantaneous heater ................................................. 8

Figure B.2 – Test setup for open-outlet instantaneous heater ................................................. 9

Figure B.3 – Example of thermocouple housing ...................................................................... 9

Figure B.4 – Outlet funnel ..................................................................................................... 10

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IEC 63159-2-2:2021 © IEC 2021 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HOUSEHOLD ELECTRIC INSTANTANEOUS WATER HEATERS –
METHODS FOR MEASURING THE PERFORMANCE –
Part 2-2: Efficiency of single point of use electric
instantaneous water heaters
FOREWORD

1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising

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International Standard IEC 63159-2-2 has been prepared by subcommittee 59C: Electrical

heating appliances for household and similar purposes, of IEC technical committee 59:

Performance of household and similar electrical appliances.
The text of this International Standard is based on the following documents:
Draft Report on voting
59C/269/FDIS 59C/273/RVD

Full information on the voting for its approval can be found in the report on voting indicated in

the above table.
The language used for the development of this International Standard is English.
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– 4 – IEC 63159-2-2:2021 © IEC 2021

This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in

accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available

at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are

described in greater detail at www.iec.ch/standardsdev/publications.
This International Standard is to be used in conjunction with IEC 63159-1:2021.

This standard supplements or modifies the corresponding clauses in IEC 63159-1. When a

particular subclause of IEC 63159-1 is not mentioned in this standard, that subclause is

applicable as far as reasonable. Where this standard states "addition", "modification" or

"replacement", the relevant requirements, test specifications or explanatory matter in

IEC 63159-1 should be adapted accordingly.

Subclauses or figures that are additional to those in IEC 63159-1 are numbered starting from

101. Additional annexes are lettered AA, BB, etc.

A list of all the parts in the IEC 63159 series, published under the general title Household

electric instantaneous water heaters – Methods for measuring the performance, can be found

on the IEC website.

The committee has decided that the contents of this document will remain unchanged until the

stability date indicated on the IEC website under webstore.iec.ch in the data related to the

specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
---------------------- Page: 6 ----------------------
IEC 63159-2-2:2021 © IEC 2021 – 5 –
HOUSEHOLD ELECTRIC INSTANTANEOUS WATER HEATERS –
METHODS FOR MEASURING THE PERFORMANCE –
Part 2-2: Efficiency of single point of use electric
instantaneous water heaters
1 Scope
This clause of IEC 63159-1:2021 is applicable except as follows.
Addition:

This document applies to open outlet, single point-of-use, electric instantaneous water heaters

intended for household or similar use, for showering purposes without downstream mixing.

This document only specifies tests for the assessment of energy efficiency.

This document does not apply to electrical instantaneous water heaters covered by other parts

of this series of standards.
2 Normative references
This clause of IEC 63159-1:2021 is applicable with the following exception:
Addition:

IEC 63159-1:2021, Household electric instantaneous water heaters – Methods for measuring

the performance – Part 1: General aspects
3 Terms and definitions
This clause of IEC 63159-1:2021 is applicable.
4 General test conditions
This clause of IEC 63159-1:2021 is applicable except as follows.
4.3 General conditions
Addition:
4.3.101 Pressure, temperature, flow, and power conditions

Pressure, temperature, and flow measurements should be maintained during testing to the

tolerance detailed in Table 1. Any deviations from these tolerances will result an invalid test.

All tests shall be performed at maximum power setting.
---------------------- Page: 7 ----------------------
– 6 – IEC 63159-2-2:2021 © IEC 2021
4.4 Test setup
Replacement:

The appliance shall be fixed in accordance with the installation instructions, except that the

shower hose shall be connected. Products covered by this document are only to be tested to

the XS load pattern detailed in Annex A, Table A.1.
The measurement setup shall correspond to Annex B.
5 Energy efficiency
This clause of IEC 63159-1:2021 is applicable except as follows.
5.1 Test method
5.1.1 General
Addition:

It is allowable to decrease the time between draw offs in order to accelerate the load pattern

detailed in Annex A, as long as it can be demonstrated that results are not affected.

Addition:
5.1.1.101 Setpoints

The appliance shall be set to achieve minimum flow (f) as specified in Annex A for all efficiency

tests. This can be increased if the appliance is unable to operate continuously and the flow rate

used recorded. This flow rate is used for all individual draw offs within the prescribed load

pattern.
5.1.2 Static efficiency
Addition:

The loss adjustment for semiconductor power switches of open outlet electronic instantaneous

water heaters is not applicable for this type of appliance.
5.1.3 Start up losses
Replacement:
The start up loss Q is the total energy in kWh that is consum
...