Gas-fired domestic appliances producing hot water - Part 3: Assessment of energy consumption of solar supported gas-fired appliances

This document is applicable to solar supported gas-fired appliances producing domestic hot water.
It applies to a system marketed as single unit or a fully specified system that:
- has a gas heat input not exceeding 70 kW; and
- has a hot water storage tank capacity not exceeding 500 l; and
- is equipped with at least one solar collector; and
- is, with regard to the solar hydraulic circuit, considered as a forced circulation system (definition according to EN ISO 9488:1999).
The appliances covered by this European Standard are described in Annex E (normative).
This document does not apply to thermo-siphon or integral collector storage tank systems according to definitions given by EN ISO 9488:1999.
NOTE In principle, the energy consumption of thermo-siphon solar preheat systems and integral collector storage tank preheat systems can also be assessed on the basis of this standard. One appropriate procedure for that purpose is to calculate the temperature level of the domestic hot water withdrawn from the thermal solar system for the reference conditions defined in this standard by using the numerical system model and the thermal solar system performance parameters according to ISO 9459-5. Based on the temperature level of the hot water withdrawn from the store the energy consumption of the gas appliance should be determined. This determination can either be done by means of calculations or by performing a test according to FprEN 13203-2:2020 and using instead of the cold water inlet temperature the hot water temperature withdrawn from the store.
This document is not intended to assess the performance:
- of the solar collector(s), which should comply with EN 12975-1:+A1:2010 and EN 12975-2:2006; and - thermal solar systems and components, which should comply with EN 12976-1:2017 and EN 12976- 2:2019.
Standard EN 13203-1:2015 sets out in qualitative and quantitative terms the performance in delivery of domestic hot water for a selected variety of uses. It also gives a presenting the information to the user. The present document sets out a method for assessing the energy performance of a solar supported appliance. It defines a number of daily tapping cycles for each domestic hot water use, kitchen, shower, bath and a combination of these, together with corresponding test procedures including information about the available solar radiation. It enables the energy performances of different gas-fired appliances to be compared and matched to the needs of the user.

Gasgeräte für die häusliche Warmwasserbereitung - Teil 3: Bewertung des Energieverbrauchs solargestützter Gasgeräte

Dieses Dokument ist auf solar unterstützte gasbefeuerte Geräte für die sanitäre Warmwasserbereitung anwendbar. Es gilt für Systeme, die als einzelne Einheit oder als vom Hersteller umfassend beschriebenes System vertrieben werden und die:
—   eine Gaswärmebelastung von höchstens 70 kW haben,
—   ein Warmwasser-Speichervolumen von höchstens 500 l haben,
—   mit mindestens einem Sonnenkollektor ausgerüstet sind und
—   im Hinblick auf den solaren hydraulischen Kreislauf als ein erzwungenes Umlaufsystem betrachtet werden (Definition nach EN ISO 9488:1999).
Die Geräte, für die dieses Dokument gilt, werden in Anhang E (normativ) beschrieben.
Dieses Dokument ist nicht anwendbar für Thermo-Siphon-Speichersysteme oder integrierte Kollektor-Speichersysteme nach den in EN ISO 9488:1999 angegebenen Definitionen.
ANMERKUNG   Im Prinzip kann jedoch der Energieverbrauch von solar vorgeheizten Thermo-Siphon-Speichersystemen und solar vorgeheizten integrierten Kollektor-Speichersystemen auf der Grundlage dieses Dokuments beurteilt werden. Eine geeignete Verfahrensweise für diesen Zweck ist, das Temperaturniveau des aus dem thermischen Solarsystem gezapften häuslichen Warmwassers für die in dieser Norm festgelegten Referenzbedingungen mit Hilfe des numerischen Modellsystems und der Leistungsparameter des thermischen Solarsystems nach ISO 9459 5 zu berechnen. Anhand des Temperaturniveaus des aus dem Speicher gezapften Warmwassers wird der Energieverbrauch des Gasgerätes bestimmt. Diese Bestimmung kann entweder anhand von Berechnungen oder mittels Durchführung einer Prüfung nach EN 13203 2:2022 und unter Verwendung der Temperatur des aus dem Speicher gezapften Warmwassers anstelle der Kaltwasser-Eintrittstemperatur erfolgen.
Dieses Dokument ist nicht dafür vorgesehen, von Folgendem die Gebrauchstauglichkeit zu beurteilen:
—   Sonnenkollektor(en), der (die) EN 12975 1:2006+A1:2010 und EN 12975 2:2006 entsprechen sollte(n);
—   thermische Solarsysteme und Bauteile, die EN 12976 1:2021 und EN 12976 2:2019 entsprechen sollten.
EN 13203 1:2015 legt die Leistung bezüglich der Abgabe von sanitärem Warmwasser für eine Auswahl von Benutzungsarten qualitativ und quantitativ fest. Sie enthält zudem ein System zur Bereitstellung von Informationen für den Nutzer.
Dieses Dokument legt ein Verfahren zur Beurteilung des Energieverhaltens eines solar unterstützten Gerätes fest. Es legt einige tägliche Zapfvorgänge für jede häusliche Warmwasserverwendung in Küche, Dusche, Bad und einer Kombination dieser Anwendungen sowie entsprechende Prüfverfahren einschließlich Informationen über die verfügbare Solarstrahlung fest. Es ermöglicht, das Energieverhalten verschiedener gasbefeuerter Geräte zu vergleichen und den Bedürfnissen des Anwenders entsprechend anzupassen.

Appareils domestiques produisant de l’eau chaude sanitaire utilisant les combustibles gazeux - Partie 3 : Évaluation de la consommation énergétique des appareils utilisant les combustibles gazeux couplés à un capteur solaire

Le présent document s’applique aux appareils de production d’eau chaude sanitaire utilisant des combustibles gazeux et couplés à un appareil solaire. Il s’applique aux systèmes commercialisés comme une seule unité ou comme un système entièrement spécifié :
-   qui ont un débit calorifique de gaz inférieur ou égal à 70 kW ;
-   qui ont une capacité du ballon d’eau chaude inférieure ou égale à 500 l ;
-   qui sont équipés d’au moins un capteur solaire ;
-   qui sont, au regard du circuit hydraulique solaire, considérés comme des systèmes à circulation forcée (définition selon l’EN ISO 9488:1999).
Les appareils couverts par le présent document sont décrits à l’Annexe E (normative).
Le présent document ne s’applique pas aux installations à thermosiphon ou à capteur autostockeur conformément aux définitions données par l’EN ISO 9488:1999.
NOTE   En principe, la consommation énergétique des installations de préchauffage solaire, qu’elles soient à thermosiphon ou à capteur autostockeur, peut également être évaluée sur la base du présent document. Pour ce faire, il faut calculer le niveau de température de l’eau chaude domestique puisée de l’installation solaire thermique dans les conditions de référence spécifiées dans la présente norme à partir du modèle numérique de l’installation et des paramètres de performance de l’installation solaire thermique conformément à l’ISO 9459-5. Selon le niveau de température de l’eau chaude puisée du ballon, la consommation d’énergie de l’appareil à gaz est déterminée. Cette détermination peut se faire, soit par calcul, soit par un essai conformément à l’EN 13203-2:2022 en remplaçant la température d’eau froide par la température de l’eau chaude puisée du ballon.
Le présent document n’est pas destiné à évaluer la performance :
-   des capteurs solaires, dont il convient que les caractéristiques soient conformes à l’EN 12975-1:2006+A1:2010 et à l’EN 12975-2:2006 ;
-   des installations solaires thermiques et leurs composants, dont il convient que les caractéristiques soient conformes à l’EN 12976-1:2021 et à l’EN 12976-2:2019.
L’EN 13203-1:2015 définit, en termes qualitatifs et quantitatifs, la performance en puisage d’eau chaude sanitaire pour une variété sélectionnée d’usages. Elle mentionne également un système pour présenter les informations à l’utilisateur.
Le présent document définit une méthode pour évaluer les performances énergétiques d’un système couplé à un appareil solaire. Il spécifie quelques cycles de puisage journaliers pour chaque utilisation d’eau chaude sanitaire, pour la cuisine, la douche, le bain et une combinaison de ces utilisations, ainsi que les modes opératoires d’essai correspondants associés à des informations sur le rayonnement solaire disponible. Le présent document permet ainsi d’établir une comparaison des performances énergétiques des appareils utilisant des combustibles gazeux et de les adapter aux besoins de l’utilisateur.

Plinske gospodinjske naprave za pripravo tople sanitarne vode - 3. del: Ocenjevanje rabe energije solarno-plinskih naprav

General Information

Status
Published
Public Enquiry End Date
01-Mar-2021
Publication Date
14-Nov-2022
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
26-Oct-2022
Due Date
31-Dec-2022
Completion Date
15-Nov-2022

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SLOVENSKI STANDARD
SIST EN 13203-3:2022
01-december-2022
Nadomešča:
SIST EN 13203-3:2010
Plinske gospodinjske naprave za pripravo tople sanitarne vode - 3. del:
Ocenjevanje rabe energije solarno-plinskih naprav
Gas-fired domestic appliances producing hot water - Part 3: Assessment of energy
consumption of solar supported gas-fired appliances
Gasgeräte für die häusliche Warmwasserbereitung - Teil 3: Bewertung des
Energieverbrauchs solargestützter Gasgeräte

Appareils domestiques produisant de l’eau chaude sanitaire utilisant les combustibles

gazeux - Partie 3 : Évaluation de la consommation énergétique des appareils utilisant les

combustibles gazeux couplés à un capteur solaire
Ta slovenski standard je istoveten z: EN 13203-3:2022
ICS:
91.140.65 Oprema za ogrevanje vode Water heating equipment
SIST EN 13203-3:2022 en,fr,de

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

---------------------- Page: 1 ----------------------
SIST EN 13203-3:2022
---------------------- Page: 2 ----------------------
SIST EN 13203-3:2022
EN 13203-3
EUROPEAN STANDARD
NORME EUROPÉENNE
August 2022
EUROPÄISCHE NORM
ICS 91.140.65 Supersedes EN 13203-3:2010
English Version
Gas-fired domestic appliances producing hot water - Part
3: Assessment of energy consumption of solar supported
gas-fired appliances

Appareils domestiques produisant de l'eau chaude Gasgeräte für die häusliche Warmwasserbereitung -

sanitaire utilisant les combustibles gazeux - Partie 3 : Teil 3: Bewertung des Energieverbrauchs

Évaluation de la consommation énergétique des solargestützter Gasgeräte
appareils utilisant les combustibles gazeux couplés à
un capteur solaire
This European Standard was approved by CEN on 13 June 2022.

This European Standard was corrected and reissued by the CEN-CENELEC Management Centre on 7 September 2022.

CEN 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 CEN

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 CEN member into its own language and notified to the CEN-CENELEC Management

Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,

Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,

Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and

United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATIO N
EUROPÄISCHES KOMITEE FÜR NORMUN G
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 13203-3:2022 E

worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN 13203-3:2022
EN 13203-3:2022 (E)
Contents Page

European foreword ....................................................................................................................................................... 4

Introduction .................................................................................................................................................................... 5

1 Scope .................................................................................................................................................................... 6

2 Normative references .................................................................................................................................... 6

3 Terms and definitions ................................................................................................................................... 7

4 General test conditions ................................................................................................................................. 8

4.1 Reference conditions ..................................................................................................................................... 8

4.2 Measurement uncertainties ........................................................................................................................ 8

4.2.1 General ................................................................................................................................................................ 8

4.2.2 Steady-state conditions ................................................................................................................................. 8

4.3 Test conditions ................................................................................................................................................. 8

4.3.1 General ................................................................................................................................................................ 8

4.3.2 Test room ........................................................................................................................................................... 8

4.3.3 Water supply ..................................................................................................................................................... 8

4.3.4 Initial adjustment of the appliance ........................................................................................................... 8

4.3.5 Conditions for the determination of the maximum load profile .................................................... 9

4.3.6 Electrical supply .............................................................................................................................................. 9

4.3.7 Solar circuit ....................................................................................................................................................... 9

4.3.8 Solar thermal input ........................................................................................................................................ 9

5 Determination of the energy consumption of the solar supported gas-fired appliance ....... 9

5.1 General ................................................................................................................................................................ 9

5.2 Load profiles and solar cycle....................................................................................................................... 9

5.3 Determination of the energy recovered by the useful water ....................................................... 10

5.4 Calculation of gas energy ........................................................................................................................... 10

5.4.1 Calculation of daily gas energy consumption in summer mode .................................................. 10

5.4.2 Calculation of daily gas energy consumption in winter mode ..................................................... 11

5.4.3 Daily gas energy consumption seasonally weighted ....................................................................... 11

5.5 Calculation of daily electrical energy consumption ........................................................................ 11

5.6 Measurement of energy consumption in standby mode ................................................................ 11

5.6.1 General ............................................................................................................................................................. 11

5.6.2 Calculation of daily gas energy consumption in standby mode .................................................. 11

5.6.3 Calculation of daily auxiliary electrical energy consumption in standby mode ................... 11

5.7 Determination of daily auxiliary energy consumption in the off mode ................................... 11

6 Determination of ration of wasted water to total water ................................................................ 11

7 Eco design related products data ........................................................................................................... 11

7.1 Water heating energy efficiency ............................................................................................................. 11

7.2 Smart control factor (SFC) and smart ................................................................................................... 11

7.3 Annual fuel consumption (AFC) .............................................................................................................. 11

7.4 Annual electricity consumption (AEC) ................................................................................................. 11

Annex A (informative) Test conditions ............................................................................................................... 12

Annex B (informative) Examples of test rig and measurement devices .................................................. 13

Annex C (informative) Declaration of the Maximum Load Profile ............................................................ 14

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SIST EN 13203-3:2022
EN 13203-3:2022 (E)

Annex D (informative) Solar collector simulator ............................................................................................. 15

D.1 General ............................................................................................................................................................. 15

D.2 Derivation of the equation used for the calculation of T ...................................................... 16

C,out

D.3 Alternative solar collector simulator .................................................................................................... 17

Annex E (normative) Appliances covered by this document ....................................................................... 20

Bibliography ................................................................................................................................................................. 22

---------------------- Page: 5 ----------------------
SIST EN 13203-3:2022
EN 13203-3:2022 (E)
European foreword

This document (EN 13203-3:2022) has been prepared by Technical Committee CEN/TC 109 “Central

heating boilers using gaseous fuels”, the secretariat of which is held by NEN.

This European Standard shall be given the status of a national standard, either by publication of an

identical text or by endorsement, at the latest by February 2023, and conflicting national standards

shall be withdrawn at the latest by February 2023.

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

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

This document supersedes EN 13203-3:2010.

The main technical changes compared to EN 13203-3:2010 are directly aligned with evolutions of

EN 13203-2, and are the following:
— improvement of editorial errors;
— incorporation of ECOTESTS results.

This document has been prepared under a Standardization Request given to CEN by the European

Commission and the European Free Trade Association.

NOTE The present document does not meet the requirement in Regulation n° 814/2013, Annex III

measurement, point 4 - Conditions for testing solar water heaters which states: “The solar collector, solar hot

water storage tank, pump in the collector loop (if applicable) and heat generator shall be tested separately...”. The

basis of the present document is that the parts are tested simultaneously, under one set of ambient conditions.

The same applies to Regulation n° 812/2013, Annex VII, point 4.

The safety operation of the boiler is not covered by this document. Safety is proved by means of the

essential safety requirements of the Gas Appliances Regulation n°426/2016/UE. This way be achieved

by compliance with the appropriate existing harmonized standards.

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

A complete listing of these bodies can be found on the CEN website.

According to the CEN-CENELEC Internal Regulations, the national standards organisations of the

following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,

Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,

Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of

North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the

United Kingdom.
---------------------- Page: 6 ----------------------
SIST EN 13203-3:2022
EN 13203-3:2022 (E)
Introduction

This document refers to clauses of EN 13203-2:2022 or adapts clauses by stating in the corresponding

clause, on the principle:

— shall be according to EN 13203-2:2022, (clause number) with the following modification;

— shall be according to EN 13203-2:2022, (clause number) with the following addition;

— EN 13203-2:2022, (clause number) is replaced by the following;
— EN 13203-2:2022, (clause number) is not applicable.

NOTE Useful standards are EN 26, EN 89, EN 15502-1, EN 15502-2-1 and EN 15502-2-2.

---------------------- Page: 7 ----------------------
SIST EN 13203-3:2022
EN 13203-3:2022 (E)
1 Scope

This document is applicable to solar supported gas-fired appliances producing domestic hot water. It

applies to a system marketed as single unit or a fully specified system that:
— has a gas heat input not exceeding 70 kW;
— has a hot water storage tank capacity not exceeding 500 l;
— is equipped with at least one solar collector;

— is, with regard to the solar hydraulic circuit, considered as a forced circulation system (definition

according to EN ISO 9488:1999).
The appliances covered by this document are described in Annex E (normative).

This document does not apply to thermo-siphon or integral collector storage tank systems according to

definitions given by EN ISO 9488:1999.

NOTE In principle, the energy consumption of thermo-siphon solar preheat systems and integral collector

storage tank preheat systems can also be assessed based on this document. One appropriate procedure for that

purpose is to calculate the temperature level of the domestic hot water withdrawn from the thermal solar system

for the reference conditions specified in this standard by using the numerical system model and the thermal solar

system performance parameters according to ISO 9459-5. Based on the temperature level of the hot water

withdrawn from the store the energy consumption of the gas appliance is determined. This determination can

either be done by means of calculations or by performing a test according to EN 13203-2:2022 and using instead

of the cold water inlet temperature the hot water temperature withdrawn from the store.

This document is not intended to assess the performance:

— of the solar collector(s), which should comply with EN 12975-1:2006+A1:2010 and

EN 12975-2:2006;

— of thermal solar systems and components, which should comply with EN 12976-1:2021 and

EN 12976-2:2019.

EN 13203-1:2015 sets out in qualitative and quantitative terms the performance in delivery of domestic

hot water for a selected variety of uses. It also gives a presenting the information to the user.

The present document sets out a method for assessing the energy performance of a solar supported

appliance. It specifies a few daily tapping cycles for each domestic hot water use, kitchen, shower, bath

and a combination of these, together with corresponding test procedures including information about

the available solar radiation. It enables the energy performances of different gas-fired appliances to be

compared and matched to the needs of the user.
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.

Shall be according to EN 13203-2:2022, Clause 2, with the following additions:

EN 12975-1:2006+A1:2010, Thermal solar systems and components — Solar collectors — Part 1: General

requirements

EN 12975-2:2006, Thermal solar systems and components — Solar collectors — Part 2: Test methods

---------------------- Page: 8 ----------------------
SIST EN 13203-3:2022
EN 13203-3:2022 (E)

EN 12976-1:2021, Thermal solar systems and components — Factory made systems — Part 1: General

requirements

EN 12976-2:2019, Thermal solar systems and components — Factory made systems — Part 2: Test

methods

EN 13203-1:2015, Gas-fired domestic appliances producing hot water — Part 1: Assessment of

performance of hot water deliveries
EN 13203-2:2022, Gas-fired domestic appliances producing hot water —
...

SLOVENSKI STANDARD
oSIST prEN 13203-3:2021
01-februar-2021
Solarno-plinske gospodinjske naprave za pripravo tople sanitarne vode - Naprave

z močjo do vključno 70 kW in s 500-litrskim hranilnikom vode - 3. del: Ocenjevanje

rabe energije

Solar supported gas-fired domestic appliances producing hot water - Appliances not

exceeding 70 kW heat input and 500 litres water storage capacity - Part 3: Assessment

of energy consumption

Solar unterstützte gasbeheizte Geräte für die sanitäre Warmwasserbereitung für den

Hausgebrauch - Geräte, die eine Nennwärmebelastung von 70 kW und eine

Speicherkapazität von 500 Liter Wasser nicht überschreiten - Teil 3: Bewertung des

Energieverbrauchs

Appareils domestiques produisant de l'eau chaude sanitaire utilisant les combustibles

gazeux couplés à un capteur solaire - Appareils de débit calorifique inférieur ou égal à 70

kW et de capacité de stockage inférieure ou égale à 500 litres - Partie 3 : É
Ta slovenski standard je istoveten z: prEN 13203-3
ICS:
91.140.65 Oprema za ogrevanje vode Water heating equipment
oSIST prEN 13203-3:2021 en,fr,de

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

---------------------- Page: 1 ----------------------
oSIST prEN 13203-3:2021
---------------------- Page: 2 ----------------------
oSIST prEN 13203-3:2021
DRAFT
EUROPEAN STANDARD
prEN 13203-3
NORME EUROPÉENNE
EUROPÄISCHE NORM
February 2021
ICS 91.140.65 Will supersede EN 13203-3:2010
English Version
Solar supported gas-fired domestic appliances producing
hot water - Appliances not exceeding 70 kW heat input and
500 litres water storage capacity - Part 3: Assessment of
energy consumption

Appareils domestiques produisant de l'eau chaude Solar unterstützte gasbeheizte Geräte für die sanitäre

sanitaire utilisant les combustibles gazeux couplés à un Warmwasserbereitung für den Hausgebrauch - Geräte,

capteur solaire - Appareils de débit calorifique die eine Nennwärmebelastung von 70 kW und eine

inférieur ou égal à 70 kW et de capacité de stockage Speicherkapazität von 500 Liter Wasser nicht

inférieure ou égale à 500 litres - Partie 3 : É überschreiten - Teil 3: Bewertung des

Energieverbrauchs

This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee

CEN/TC 109.

If this draft becomes a European Standard, CEN 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.

This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other

language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC

Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,

Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,

Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and

United Kingdom.

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are

aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without

notice and shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 13203-3:2021 E

worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
oSIST prEN 13203-3:2021
prEN 13203-3:2021 (E)
Contents Page

European foreword ....................................................................................................................................................... 4

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

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

3 Definitions ......................................................................................................................................................... 6

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

4.1 Reference conditions ..................................................................................................................................... 7

4.2 Measurement uncertainties ........................................................................................................................ 7

4.2.1 General ................................................................................................................................................................ 7

4.2.2 Steady-state conditions ................................................................................................................................. 7

4.3 Test conditions ................................................................................................................................................. 7

4.3.1 General ................................................................................................................................................................ 7

4.3.2 Test room ........................................................................................................................................................... 7

4.3.3 Water supply ..................................................................................................................................................... 8

4.3.4 Initial adjustment of the appliance ........................................................................................................... 8

4.3.5 Conditions for the determination of the maximum load profile .................................................... 8

4.3.6 Electrical supply .............................................................................................................................................. 8

4.3.7 Solar circuit ....................................................................................................................................................... 8

4.3.8 Solar thermal input ........................................................................................................................................ 8

5 Determination of the energy consumption of the solar supported gas-fired appliance ....... 8

5.1 General ................................................................................................................................................................ 8

5.2 Load profiles ..................................................................................................................................................... 8

5.3 Determination of the energy recovered by the useful water ....................................................... 10

5.4 Calculation of gas energy ........................................................................................................................... 10

5.4.1 Calculation of daily gas energy consumption in summer mode .................................................. 10

5.4.2 Calculation of daily gas energy consumption in winter mode ..................................................... 10

5.4.3 Daily gas energy consumption seasonally weighted ....................................................................... 10

5.5 Calculation of daily electrical energy consumption ........................................................................ 10

5.6 Measurement of energy consumption in standby mode ................................................................ 10

5.6.1 General ............................................................................................................................................................. 10

5.6.2 Calculation of daily gas energy consumption in standby mode .................................................. 10

5.6.3 Calculation of daily auxiliary electrical energy consumption in standby mode ................... 10

5.7 Measurement of daily auxiliary energy consumption in the off mode ..................................... 10

6 Determination of ration of wasted water to total water ................................................................ 10

7 Eco design Related Products Data .......................................................................................................... 10

7.1 Water heating energy efficiency ............................................................................................................. 10

7.2 Smart control factor (SFC) and smart ................................................................................................... 11

7.3 Annual fuel consumption (AFC) .............................................................................................................. 11

7.4 Daily fuel consumption (Q ) .................................................................................................................. 11

fuel

7.5 Annual electricity consumption (AEC) ................................................................................................. 11

7.6 Daily electricity consumption (Q ) ..................................................................................................... 11

elec

7.7 Mixed water at 40°C (V40) for storage water heaters .................................................................... 11

Annex A (informative) Test conditions ............................................................................................................ 12

Annex B (informative) Examples of test rig and measurement devices ............................................... 13

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oSIST prEN 13203-3:2021
prEN 13203-3:2021 (E)

Annex C (informative) Declaration of the Maximum Load Profile .......................................................... 14

Annex D (informative) Solar collector simulator .......................................................................................... 15

D.1 General ............................................................................................................................................................. 15

D.2 Derivation of the equation used for the calculation of T ......................................................... 16

C,out

D.3 Alternative solar collector simulator .................................................................................................... 17

Annex E (normative) Appliances covered by this European Standard ................................................. 20

Bibliography ................................................................................................................................................................. 22

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oSIST prEN 13203-3:2021
prEN 13203-3:2021 (E)
European foreword

This document (prEN 13203-3:2021) has been prepared by Technical Committee CEN/TC 109 “Central

heating boilers using gaseous fuels”, the secretariat of which is held by NEN.
This document is currently submitted to the CEN Enquiry.

This European Standard refers to clauses of prEN 13203-2:2020 or adapts clauses by stating in the

corresponding clause, on the principle:

— shall be according to prEN 13203-2:2020, (clause number) with the following modification;

— shall be according to prEN 13203-2:2020, (clause number) with the following addition;

— prEN 13203-2:2020, (clause number) is replaced by the following;
— prEN 13203-2:2020, (clause number) is not applicable.

The safety operation of the boiler is not covered by this standard. Safety is proved by means of the

essential safety requirements of the Gas Appliances Regulation n°426/2016/UE. This way be achieved

by compliance with the appropriate existing harmonized standards.

NOTE Useful standards are EN 26, EN 89, EN 15502-1, EN 15502-2-1 and EN 15502-2-2.

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oSIST prEN 13203-3:2021
prEN 13203-3:2021 (E)
1 Scope

This document is applicable to solar supported gas-fired appliances producing domestic hot water. It

applies to a system marketed as single unit or a fully specified system that:
— has a gas heat input not exceeding 70 kW; and
— has a hot water storage tank capacity not exceeding 500 l; and
— is equipped with at least one solar collector; and

— is, with regard to the solar hydraulic circuit, considered as a forced circulation system (definition

according to EN ISO 9488:1999).

The appliances covered by this European Standard are described in Annex E (normative).

This document does not apply to thermo-siphon or integral collector storage tank systems according to

definitions given by EN ISO 9488:1999.

In principle, the energy consumption of thermo-siphon solar preheat systems and integral collector

storage tank preheat systems can also be assessed on the basis of this document. One appropriate

procedure for that purpose is to calculate the temperature level of the domestic hot water withdrawn

from the thermal solar system for the reference conditions defined in this standard by using the

numerical system model and the thermal solar system performance parameters according to

ISO 9459-5. Based on the temperature level of the hot water withdrawn from the store the energy

consumption of the gas appliance is determined. This determination can either be done by means of

calculations or by performing a test according to prEN 13203-2:2020 and using instead of the cold

water inlet temperature the hot water temperature withdrawn from the store.
This document is not intended to assess the performance:

— of the solar collector(s), which should comply with EN 12975-1+A1:2010 and EN 12975-2:2006;

and

— thermal solar systems and components, which should comply with EN 12976-1:2017 and

EN 12976-2:2019.

EN 13203-1:2015 sets out in qualitative and quantitative terms the performance in delivery of domestic

hot water for a selected variety of uses. It also gives a presenting the information to the user.

The present document sets out a method for assessing the energy performance of a solar supported

appliance. It defines a number of daily tapping cycles for each domestic hot water use, kitchen, shower,

bath and a combination of these, together with corresponding test procedures including information

about the available solar radiation. It enables the energy performances of different gas-fired appliances

to be compared and matched to the needs of the user.
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.

EN 12975-1:2010, Thermal solar systems and components — Solar collectors — Part 1: General

requirements

EN 12975-2:2006, Thermal solar systems and components — Solar collectors — Part 2: Test methods

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oSIST prEN 13203-3:2021
prEN 13203-3:2021 (E)

EN 12976-1:2017, Thermal solar systems and components - Factory made systems - Part 1: General

requirements

EN 12976-2:2019, Thermal solar systems and components - Factory made systems - Part 2: Test methods

EN 13203-1:2015, Gas fired domestic appliances producing hot water - Part 1: Assessment of performance

of hot water deliveries

prEN 13203-2:2020, Gas-fired domestic appliances producing hot water – Part 2: Assessment of energy

consumption

ISO 9459-5:2007, Solar heating — Domestic water heating systems — Part 5: System performance

characterization by means of whole-system tests and computer simulation
3 Definitions

For the purposes of this document, the terms and definitions given in prEN 13203-2:2020 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
aperture area of solar collector
maximum projected area through which solar radiation enters the collector
NOTE See definition and explanation according to EN ISO 9488:1999.
3.2
controls
all hydraulic, thermal and electr
...

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