SIST EN IEC 63159-1:2022

Household electric instantaneous water heaters - Methods for measuring the performance - Part 1: General aspects

This document applies to electric instantaneous water heaters for domestic hot water heating
for household and similar applications, which show both of the following characteristics:
– fulfilling at least one load pattern from Annex A;
– heating up to temperatures below the boiling temperature.
This document specifies terms, definitions and measurement methods for the assessment of
energy efficiency.
This document does not take into account requirements regarding the safety of the appliances

Elektro-Durchfluss-Wassererwärmer für den Hausgebrauch – Prüfverfahren zur Messung der Gebrauchseigenschaften – Teil 1: Allgemeines

Chauffe-eau instantanés électrodomestiques - Méthodes de mesure de l'aptitude à la fonction - Partie 1: Aspects généraux

L'IEC 63159-1:2021 s'applique aux chauffe-eau instantanés électriques destinés au chauffage de l'eau chaude sanitaire pour des applications domestiques et analogues, présentant les deux caractéristiques suivantes:
– satisfaisant à au moins un diagramme de charge de l'Annexe A;
– chauffant jusqu'à des températures inférieures à la température d'ébullition.
Le présent document spécifie les termes, définitions et méthodes de mesure pour l'évaluation du rendement énergétique.
Le présent document ne tient pas compte des exigences concernant la sûreté des appareils.

Gospodinjski električni pretočni grelniki vode - Metode za merjenje lastnosti - 1. del: Splošno

Ta dokument se uporablja za električne pretočne grelnike vode v gospodinjstvih za gospodinjske in podobne aparate, pri katerih velja, da: – izpolnjujejo vsaj enega od vzorcev obremenitve iz dodatka A; – grejejo do temperatur pod temperaturo vrelišča. Ta dokument določa izraze, definicije in merilne metode za oceno energijske učinkovitosti. Ta dokument ne zajema zahtev glede varnosti aparatov.

General Information

• Status: Published
• Publication Date: 12-Jan-2022
• ICS: 91.140.65 - Water heating equipment
• ICS: 97.100.10 - Electric heaters
• Technical Committee: FGA - Consumer information related to household electrical appliances
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 13-Dec-2021
• Due Date: 17-Feb-2022
• Completion Date: 13-Jan-2022
• Ref Project: EN IEC 63159-1:2021 - Household electric instantaneous water heaters - Methods for measuring the performance - Part 1: General aspects

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN IEC 63159-1:2022
01-februar-2022

Gospodinjski električni pretočni grelniki vode - Metode za merjenje lastnosti - 1.

del: Splošno
Household electric instantaneous water heaters - Methods for measuring the
performance - Part 1: General aspects
Ta slovenski standard je istoveten z: EN IEC 63159-1:2021
ICS:
91.140.65 Oprema za ogrevanje vode Water heating equipment
97.100.10 Električni grelniki Electric heaters
SIST EN IEC 63159-1:2022 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN IEC 63159-1:2022
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SIST EN IEC 63159-1:2022
EUROPEAN STANDARD EN IEC 63159-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
November 2021
ICS 91.140.65
English Version
Household electric instantaneous water heaters - Methods for
measuring the performance - Part 1: General aspects
(IEC 63159-1:2021)

Chauffe-eau instantanés électrodomestiques - Méthodes de Elektro-Durchfluss-Wassererwärmer für den Hausgebrauch

mesure de l'aptitude à la fonction - Partie 1: Aspects - Prüfverfahren zur Messung der Gebrauchseigenschaften -

généraux Teil 1: Allgemeines
(IEC 63159-1:2021) (IEC 63159-1:2021)

This European Standard was approved by CENELEC on 2021-11-25. CENELEC members are bound to comply with the CEN/CENELEC

Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC

Management Centre or to any CENELEC member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by translation

under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the

same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,

Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the

Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2021 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.

Ref. No. EN IEC 63159-1:2021 E
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SIST EN IEC 63159-1:2022
EN IEC 63159-1:2021 (E)
European foreword

The text of document 59C/267/FDIS, future edition 1 of IEC 63159-1, prepared by SC 59C “Electrical

heating appliances for household and similar purposes” of IEC/TC 59 “Performance of household and

similar electrical appliances” was submitted to the IEC-CENELEC parallel vote and approved by

CENELEC as EN IEC 63159-1:2021.
The following dates are fixed:

• latest date by which the document has to be implemented at national (dop) 2022–08–25

level by publication of an identical national standard or by endorsement

• latest date by which the national standards conflicting with the (dow) 2024–11–25

document have to be withdrawn

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.

Any feedback and questions on this document should be directed to the users’ national committee. A

complete listing of these bodies can be found on the CENELEC website.
Endorsement notice

The text of the International Standard IEC 63159-1:2021 was approved by CENELEC as a European

Standard without any modification.

In the official version, for Bibliography, the following notes have to be added for the standards

indicated:
IEC 60335-1 NOTE Harmonized as EN 60335-1
IEC 60335-2-35 NOTE Harmonized as EN 60335-2-35
IEC 60584-1 NOTE Harmonized as EN 60584-1
IEC 60584-2 NOTE Harmonized as EN 60584-2
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SIST EN IEC 63159-1:2022
EN IEC 63159-1:2021 (E)
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any amendments)

applies.

NOTE 1 Where an International Publication has been modified by common modifications, indicated by (mod), the

relevant EN/HD applies.

NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available

here: www.cenelec.eu.
Publication Year Title EN/HD Year
IEC 63159-2-1 - Household electric instantaneous water EN IEC 63159-2-1 -
heaters - Methods for measuring the
performance - Part 2-1: Multifunctional
electric instantaneous water heaters
IEC 63159-2-2 - Household electric instantaneous water EN IEC 63159-2-2 -
heaters - Methods for measuring the
performance - Part 2-2: Efficiency of single
point of use electric instantaneous water
heaters
ISO 228-1 - Pipe threads where pressure-tight joints - -
are not made on the threads - Part 1:
Dimensions, tolerances and designation
ISO 2768-1 - General tolerances - Part 1: Tolerances for - -
linear and angular dimensions without
individual tolerance indications
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SIST EN IEC 63159-1:2022
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SIST EN IEC 63159-1:2022
IEC 63159-1
Edition 1.0 2021-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Household electric instantaneous water heaters – Methods for measuring the
performance –
Part 1: General aspects
Chauffe-eau instantanés électrodomestiques – Méthodes de mesure de
l'aptitude à la fonction –
Partie 1: Aspects généraux
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 91.140.65 ISBN 978-2-8322-1040-5

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
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SIST EN IEC 63159-1:2022
– 2 – IEC 63159-1:2021 © IEC 2021
CONTENTS

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

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

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

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

4 General test conditions .................................................................................................... 7

4.1 Measurement equipment ......................................................................................... 7

4.2 Number of appliances to be tested .......................................................................... 8

4.3 General conditions .................................................................................................. 8

4.4 Test setup ............................................................................................................... 9

5 Energy efficiency ............................................................................................................. 9

5.1 Test methods .......................................................................................................... 9

5.1.1 General ........................................................................................................... 9

5.1.2 Static efficiency ............................................................................................... 9

5.1.3 Start-up losses .............................................................................................. 10

5.2 Calculation methods ............................................................................................. 11

5.2.1 General ......................................................................................................... 11

5.2.2 Daily energy demand ..................................................................................... 11

5.2.3 Efficiency calculation ..................................................................................... 11

6 Performance tests ......................................................................................................... 12

Annex A (normative) Load pattern ........................................................................................ 13

Annex B (normative) Test setup ........................................................................................... 17

Bibliography .......................................................................................................................... 21

Figure B.1 – Test setup for open outlet instantaneous water heater ...................................... 17

Figure B.2 – Test setup for closed instantaneous water heater ............................................. 18

Figure B.3 – Temperature sensor water connection part ....................................................... 19

Figure B.4 – Example of a thermocouple feed through .......................................................... 20

Table 1 – Measurement equipment accuracy .......................................................................... 8

Table A.1 – Water heater load patterns (reference test tapping patterns) 3XS to S ............... 14

Table A.2 – Water heater load patterns (reference test tapping patterns) M to XL ................. 15

Table A.3 – Water heater load patterns (reference test tapping patterns) XXL to 4XL ........... 16

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SIST EN IEC 63159-1:2022
IEC 63159-1:2021 © IEC 2021 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HOUSEHOLD ELECTRIC INSTANTANEOUS WATER HEATERS –
METHODS FOR MEASURING THE PERFORMANCE –
Part 1: General aspects
FOREWORD

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

all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international

co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and

in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,

Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their

preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with

may participate in this preparatory work. International, governmental and non-governmental organizations liaising

with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for

Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.

2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international

consensus of opinion on the relevant subjects since each technical committee has representation from all

interested IEC National Committees.

3) IEC Publications have the form of recommendations for international use and are accepted by IEC National

Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC

Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any

misinterpretation by any end user.

4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications

transparently to the maximum extent possible in their national and regional publications. Any divergence between

any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.

5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity

assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any

services carried out by independent certification bodies.

6) All users should ensure that they have the latest edition of this publication.

7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and

members of its technical committees and IEC National Committees for any personal injury, property damage or

other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and

expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC

Publications.

8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is

indispensable for the correct application of this publication.

9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent

rights. IEC shall not be held responsible for identifying any or all such patent rights.

International Standard IEC 63159-1 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/267/FDIS 59C/271/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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SIST EN IEC 63159-1:2022
– 4 – IEC 63159-1:2021 © IEC 2021

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.

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.

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.
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SIST EN IEC 63159-1:2022
IEC 63159-1:2021 © IEC 2021 – 5 –
HOUSEHOLD ELECTRIC INSTANTANEOUS WATER HEATERS –
METHODS FOR MEASURING THE PERFORMANCE –
Part 1: General aspects
1 Scope

This document applies to electric instantaneous water heaters for domestic hot water heating

for household and similar applications, which show both of the following characteristics:

– fulfilling at least one load pattern from Annex A;
– heating up to temperatures below the boiling temperature.

This document specifies terms, definitions and measurement methods for the assessment of

energy efficiency.

This document does not take into account requirements regarding the safety of the appliances.

2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies.

For undated references, the latest edition of the referenced document (including any

amendments) applies.

IEC 63159-2-1, Household electric instantaneous water heaters – Methods for measuring the

performance – Part 2-1: Multifunctional electric instantaneous water heaters

IEC 63159-2-2, Household electric instantaneous water heaters – Methods for measuring the

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

ISO 2768-1, General tolerances – Part 1: Tolerances for linear and angular dimensions without

individual tolerance indications

ISO 228-1, Pipe threads where pressure-tight joints are not made on the threads – Part 1:

Dimensions, tolerances and designation
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.

ISO and IEC maintain terminological databases for use in standardization at the following

addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1
instantaneous water heater
appliance intended to heat water while it flows through the appliance
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SIST EN IEC 63159-1:2022
– 6 – IEC 63159-1:2021 © IEC 2021
3.1.1
electric instantaneous water heater
instantaneous water heater using electric energy as its energy source
3.1.2
closed instantaneous water heater

instantaneous water heater intended to operate at the pressure of the water system, the flow of

water being controlled by one or more valves in the outlet system
3.1.3
open-outlet instantaneous water heater

instantaneous water heater in which the flow of water is controlled by a valve in the inlet pipe,

there being no valve in the outlet pipe
3.1.4
hydraulic instantaneous water heater

instantaneous water heater whose heating elements are each switched on or off, depending on

the water flow rate or water pressure
3.2
temperature selector

actuator that presets the temperature set-point value of the water outlet and that can be

adjusted by the user
3.3
temperature control

actuator that adjusts the temperature of the outlet water by varying the flow of water through

the appliance or by varying the power applied to the heater(s), or by varying a combination of

the two
3.4
independent flow control

actuator that adjusts the flow of water through the appliance with no significant change in the

outlet's water temperature
3.5
flow regulator

actuator that limits the flow of water through the appliance regardless of variations in line

pressure
3.6
flow restrictor
device that defines a flow of water through the appliance for a set pressure
3.7
power selector

actuator that presets electrical power of the unit and that can be adjusted by the user

Note 1 to entry: The water outlet temperature depends on flow rate and/or inlet temperature.

3.8
load profile
load pattern

means of illustrating the power consumption of an instantaneous water heater over a 24-hour

period
3.9
smart control
system that can demonstrate a reduction in energy consumption
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SIST EN IEC 63159-1:2022
IEC 63159-1:2021 © IEC 2021 – 7 –
3.10
useable water

water at or above the temperature T for the relevant draw-off and load pattern specified in the

tables of Annex A
3.11
static electric losses

part of the energy that is dissipated by unwanted effects, including energy lost by unwanted

heating of resistive components
3.12
smart control factor
SCF
factor describing the water heating energy efficiency gain due to smart control
Note 1 to entry: The SCF value is between 0 and 1.
3.13
energy-related product
ErP

product that uses energy, or that does not use energy but has an impact on energy consumption

3.14
conversion coefficient

factor to indicate how much primary energy is used to generate a unit of electricity

3.15
annual electricity consumption
AEC
electricity consumption per year
3.16
declared load profile
load profile declared by the manufacturer for the appliance
4 General test conditions
4.1 Measurement equipment
Table 1 gives the accuracy of measurement equipment.
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SIST EN IE
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