Gas-fired domestic appliances producing hot water - Part 2: Assessment of energy consumption

This European Standard is applicable to gas-fired appliances producing domestic hot water. It applies to both instantaneous and storage tank appliances; waters-heaters and combination boilers that have:
-   a heat input not exceeding 70 kW; and
-   a hot water storage tank capacity (if any) not exceeding 500 l.
In the case of combination boilers, with or without storage tank, domestic hot water production is integrated or coupled, the whole being marketed as a single unit.
EN 13203-1 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 system for presenting the information to the user. The present document sets out a method for assessing the energy performance of the appliances. 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, enabling the energy performances of different gas-fired appliances to be compared and matched to the needs of the user. Where other technologies are combined with a gas-fired boiler or a water heater to produce domestic hot water, specific parts of EN 13203 apply.

Gasbeheizte Geräte für die sanitäre Warmwasserbereitung für den Hausgebrauch - Teil 2: Bewertung des Energieverbrauchs

Dieses Dokument gilt für gasbeheizte Geräte für die sanitäre Warmwasserbereitung. Sie gilt sowohl für Durchlauferhitzer als auch Warmwasserspeicher, Warmwasserbereiter sowie Kombikessel mit:
-   einer Wärmebelastung von höchstens 400 kW; und
-   einem Warmwasser-Speichervolumen (sofern vorhanden) von höchstens 2 000 l.
Bei Kombikesseln mit oder ohne Speicher ist die sanitäre Warmwasserbereitung im Kessel eingebaut oder am Kessel angebaut; das Gerät wird als eine Gesamteinheit vertrieben.
EN 13203 1 legt mehrere qualitative und quantitative Leistungsstufen für die sanitäre Warmwasserbereitung für eine Auswahl von Benutzungsarten fest. Sie enthält zudem ein System zur Bereitstellung von Informationen für den Nutzer. Dieses Dokument legt ein Verfahren zur Bewertung des Energieverhaltens der Geräte fest. Es definiert eine Anzahl täglicher Lastprofile für die sanitäre Warmwasserverwendung in der Küche, zum Duschen und Baden sowie für Kombinationen dieser Verwendungsarten und legt die entsprechenden Prüfverfahren fest, mit denen sich das Energieverhalten unterschiedlicher gasbeheizter Geräte vergleichen und auf die Bedürfnisse des Nutzers ausrichten lässt. Werden andere Technologien mit einem gasbeheizten Kessel oder einem Warmwasserbereiter für die sanitäre Warmwasserbereitung kombiniert, gelten die jeweils zutreffenden Teile der EN 13203.

Appareils domestiques produisant de l'eau chaude sanitaire utilisant les combustibles gazeux - Partie 2 : Evaluation de la consommation énergétique

Le présent document s’applique aux appareils de production d’eau chaude sanitaire utilisant les combustibles gazeux. Elle s’applique à la fois aux appareils de type instantané et avec ballon, chauffeeau ou chaudières à deux services, qui ont :
- un débit calorifique inférieur ou égal à 400 kW ; et
- une capacité de stockage en eau chaude (le cas échéant) inférieure ou égale à 2 000 l.
Dans le cas des chaudières à deux services avec ou sans ballon, la production d’eau chaude sanitaire est intégrée ou accolée, l’ensemble étant commercialisé comme une seule unité.
L’EN 13203-1 définit en termes qualitatifs et quantitatifs la performance du puisage d’eau chaude sanitaire pour une variété sélectionnée d’usages. Elle fournit également un système pour présenter les informations à l’utilisateur. Le présent document définit une méthode pour évaluer les performances énergétiques des appareils. Il définit plusieurs profils de soutirage journaliers pour chaque utilisation d’eau chaude sanitaire, cuisine, douche, bain et une combinaison de ces derniers, ainsi que les modes
opératoires d’essai correspondants, afin de pouvoir établir une comparaison des performances
énergétiques des appareils utilisant les combustibles gazeux et de les adapter aux besoins de
l’utilisateur. Si d’autres technologies sont combinées avec une chaudière à gaz ou un chauffe-eau pour
produire de l’eau chaude sanitaire, des parties spécifiques de l’EN 13203 s’appliquent.

Plinske gospodinjske naprave za pripravo tople sanitarne vode - 2. del: Ocenjevanje rabe energije

Ta evropski standard se uporablja za plinske gospodinjske naprave za pripravo tople sanitarne vode. uporablja se za pretočne in shranjevalne rezervoarje, grelnike za vodo in kombinirane kotle s:
– toplotno močjo, ki ne presega 70 kW in
– prostornino rezervoarja (če je na voljo) za toplo vodo do 500 l.
Pri kombiniranih kotlih, z rezervoarjem ali brez, je priprava tople vode za gospodinjstva integrirana ali združena, pri čemer se celota trži kot ena enota.
Standard EN 13203-1 v kakovostnem in količinskem smislu določa zmogljivost za pripravo tople sanitarne vode za različne izbrane namene. Zajema tudi sistem za predstavitev informacij uporabniku. Ta dokument določa metodo za ocenjevanje energetske učinkovitosti aparatov. Določa število dnevnih ciklov izpuščanja za vsako uporabo gospodinjske tople vode, kuhinjo, prho, kad in njihove kombinacije, skupaj z ustreznimi preskusnimi postopki, za omogočanje energijske zmogljivosti različnih plinskih naprav za primerjavo in uskladitev s potrebami uporabnika. Posebni deli standarda EN 13203 se uporabljajo, kadar so druge tehnologije združene s plinskimi kotli ali vodnimi grelniki za pripravo tople sanitarne vode.

General Information

Status
Published
Public Enquiry End Date
04-Jan-2017
Publication Date
12-Mar-2019
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
08-Jan-2019
Due Date
15-Mar-2019
Completion Date
13-Mar-2019

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Standards Content (sample)

SLOVENSKI STANDARD
SIST EN 13203-2:2019
01-april-2019
Nadomešča:
SIST EN 13203-2:2015
Plinske gospodinjske naprave za pripravo tople sanitarne vode - 2. del:
Ocenjevanje rabe energije
Gas-fired domestic appliances producing hot water - Part 2: Assessment of energy
consumption

Gasbeheizte Geräte für die sanitäre Warmwasserbereitung für den Hausgebrauch - Teil

2: Bewertung des Energieverbrauchs

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

gazeux - Partie 2 : Evaluation de la consommation énergétique
Ta slovenski standard je istoveten z: EN 13203-2:2018
ICS:
91.140.65 Oprema za ogrevanje vode Water heating equipment
SIST EN 13203-2:2019 en,fr,de

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

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SIST EN 13203-2:2019
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SIST EN 13203-2:2019
EN 13203-2
EUROPEAN STANDARD
NORME EUROPÉENNE
December 2018
EUROPÄISCHE NORM
ICS 91.140.65 Supersedes EN 13203-2:2015
English Version
Gas-fired domestic appliances producing hot water - Part
2: Assessment of energy consumption

Appareils domestiques produisant de l'eau chaude Gasbeheizte Geräte für die sanitäre

sanitaire utilisant les combustibles gazeux - Partie 2 : Warmwasserbereitung für den Hausgebrauch - Teil 2:

Évaluation de la consommation énergétique Bewertung des Energieverbrauchs
This European Standard was approved by CEN on 26 October 2018.

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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,

Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2018 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 13203-2:2018 E

worldwide for CEN national Members.
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SIST EN 13203-2:2019
EN 13203-2:2018 (E)
Contents Page

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

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

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

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

3 Terms and definitions ................................................................................................................................... 6

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 ................................................................................................................................. 9

4.3 Test conditions ................................................................................................................................................. 9

4.3.1 General ................................................................................................................................................................ 9

4.3.2 Test room ........................................................................................................................................................... 9

4.3.3 Water supply ..................................................................................................................................................... 9

4.3.4 Initial adjustment of the appliance ........................................................................................................ 10

4.3.5 Conditions for the determination of the maximum load profile ................................................. 10

4.3.6 Electrical supply ........................................................................................................................................... 10

5 Determination of the energy consumption of the appliance ........................................................ 11

5.1 General ............................................................................................................................................................. 11

5.2 Load profiles .................................................................................................................................................. 11

5.3 Determination of the energy recovered by the useful water ....................................................... 18

5.4 Calculation of gas energy ........................................................................................................................... 19

5.4.1 Calculation of daily gas energy consumption in summer mode .................................................. 19

5.4.2 Calculation of daily gas energy consumption in winter mode ..................................................... 19

5.4.3 Daily gas energy consumption seasonally weighted ....................................................................... 20

5.5 Calculation of daily electrical energy consumption ........................................................................ 20

5.6 Measurement of energy consumption in standby mode ................................................................ 21

5.6.1 General ............................................................................................................................................................. 21

5.6.2 Calculation of daily gas energy consumption in standby mode .................................................. 21

5.6.3 Calculation of daily auxiliary electrical energy consumption in standby mode ................... 22

5.7 Determination of daily auxiliary electrical energy consumption in off mode ....................... 22

6 Determination of the ratio of wasted water to total water ........................................................... 22

7 Eco design Related Products Data .......................................................................................................... 23

7.1 Water heating energy efficiency ............................................................................................................. 23

7.2 Annual fuel consumption (AFC) .............................................................................................................. 24

7.3 Annual electricity consumption (AEC) ................................................................................................. 25

7.4 Mixed water at 40°C (V40) for storage water heaters .................................................................... 25

Annex A (informative) Test conditions ............................................................................................................ 28

Annex B (informative) Test rig and measurement devices ...................................................................... 31

B.1 General ............................................................................................................................................................. 31

B.2 Pressure measurement .............................................................................................................................. 32

B.3 Temperature measurement ..................................................................................................................... 32

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Annex C (informative) Declaration of the Maximum Load Profile ........................................................... 36

Annex ZA (informative) Relationship between this European Standard and the ecodesign

requirements of Commission Regulation (EU) n° 814/2013 [OJEU L239 of 6 September

2013] aimed to be covered ........................................................................................................................ 37

Annex ZB (informative) Relationship between this European Standard and the energy labelling

requirements of Commission Delegated Regulation (EU) No 812/2013 [OJEU L239 of 6

September 2013] aimed to be covered ................................................................................................. 38

Annex ZC (informative) Relationship between this European Standard and the ecodesign

requirements of Commission Regulation (EU) n° 813/2013 [OJEU L239 of 6 September

2013] aimed to be covered ........................................................................................................................ 39

Annex ZD (informative) Relationship between this European Standard and the energy labelling

requirements of Commission Delegated Regulation (EU) No 811/2013 [OJEU L239 of 6

September 2013] aimed to be covered ................................................................................................. 40

Bibliography ................................................................................................................................................................. 41

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SIST EN 13203-2:2019
EN 13203-2:2018 (E)
European foreword

This document (EN 13203-2:2018) 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 June 2019, and conflicting national standards shall be withdrawn at

the latest by June 2019.

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 13203-2:2015.
The main technical changes compared to EN 13203-2:2015 are the following:

— improvement of the test conditions (e.g. water supply, initial adjustment of the appliance);

— addition of further load profile XS for small appliances;

— addition of new clause dealing with mixed water at 40°C (V40) for storage water heaters and

corresponding complement to Annex ZA (informative);

— addition of new Annex C (informative) dealing with the declaration of the maximum load profile.

The main purpose of this revision is to provide a means of conforming to requirements of Commission

Delegated Regulation (EC) n° 813/2013, (EC) n° 811/2013, (EC) n° 812/2013 and (EC) n° 814/2013.

This document has been prepared under a mandate given to CEN by the European Commission and the

European Free Trade Association, and supports essential requirements of EU Regulation(s).

For relationship with EU Directive(s), see informative Annex ZA, ZB, ZC or ZD, which are an integral part of

this document.

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, Former Yugoslav Republic of Macedonia, France, Germany, Greece,

Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,

Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.

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EN 13203-2:2018 (E)
Introduction

The safety operation of the boiler or water heater is not covered by this standard. Safety should be proved by

means of the essential safety requirements of the Gas Appliances Regulation 2016/426/UE. This may 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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EN 13203-2:2018 (E)
1 Scope

This document is applicable to gas-fired appliances producing domestic hot water. It applies to both

instantaneous and storage tank appliances; waters-heaters and combination boilers that have:

— a heat input not exceeding 400 kW; and
— a hot water storage tank capacity (if any) not exceeding 2000 l.

In the case of combination boilers, with or without storage tank, domestic hot water production is integrated

or coupled, the whole being marketed as a single unit.

EN 13203-1 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 system for presenting the information to the user. The present

document sets out a method for assessing the energy performance of the appliances. It defines a number of

daily load profiles for each domestic hot water use, kitchen, shower, bath and a combination of these, together

with corresponding test procedures, enabling the energy performances of different gas-fired appliances to be

compared and matched to the needs of the user. Where other technologies are combined with a gas-fired

boiler or a water heater to produce domestic hot water, specific parts of EN 13203 apply.

2 Normative references
There are no normative references in this document.
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
storage tank
reservoir for domestic hot water
3.2
nominal domestic hot water heat input (Q )

value of the heat input for the production of domestic hot water stated in the instructions

— Symbol: Q
— Unit: kilowatt (kW)
3.3
summer mode

conditions during which the appliance supplies energy only for the production of domestic hot water

3.4
winter mode

conditions during which the combination boiler supplies energy for the production of domestic hot water and

space heating
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EN 13203-2:2018 (E)
3.5
domestic water test temperature
temperature of the delivered water at which the tests are conducted
3.6
control cycle

the time cycle for keeping components and/or the storage tank (if any) of the domestic hot water circuit at

predetermined temperature level, consists of an «ON» duration time during which the heating of the domestic

hot water (by gas energy and/or auxiliary energy) is operating, and an «OFF» duration time during which no

heating occurs
3.7
useful water

quantity of water delivered at the tap for which the temperature increase is in accordance with the

requirement fixed for each individual delivery of the load profiles
3.8
wasted water

quantity of water delivered at the tap for which the temperature increase is not in accordance with the

requirement fixed for each individual delivery of the load profiles
3.9
stand by mode

operating state in which the appliance can provide domestic hot water at any time

Note 1 to entry: In the case of an appliance with a control cycle for keeping components and/or the storage tank (if

any) of the domestic hot water circuit at predetermined temperature level no draw-off is made.

3.10
off mode

state of an appliance, selected by the user, in which domestic hot water cannot be provided

3.11
useful water flow rate (D )
useful

quantity of water delivered by unit time at the tap for which the temperature increase is in accordance with

the requirement fixed for each individual draw-off of the load profiles
3.12
useful water temperature
water temperature, expressed in degrees Celsius, delivered at the tap
3.13
appliance flow rate

quantity of water delivered by the appliance by unit time before the mixing device, if applicable

3.14
appliance water temperature (T )

water temperature, expressed in degrees Celsius, delivered by the appliance before the mixing device

3.15
water temperature rise (∆T ) in K

difference between the useful water temperature and the cold water temperature, at which hot water is

contributing to the reference energy as specified in the load profiles
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SIST EN 13203-2:2019
EN 13203-2:2018 (E)
3.16
water temperature rise for basin draw-off types (∆T ) in K

difference between the useful water temperature and the cold water temperature, to be achieved during the

water draw-offs, with a minimum value as specified in the load profiles

Note 1 to entry: The minimum temperature difference for basin draw-offs as specified in the load profiles shall be

achieved at least once during the water draw-offs.
3.17
rapid response temperature sensor

measuring instrument with a response time such that 90 % of the final temperature rise, from 15 °C to 100 °C,

is obtained within about 1 s, when the sensor is plunged into still water
4 General test conditions
4.1 Reference conditions
Unless otherwise stated, the general test conditions shall be as follows:
— cold water temperature: 10 °C;
— maximum average variation over the test period: ± 2 K;
— cold water pressure: (2 ± 0,1) bar;
— ambient air temperature: 20 °C;
— maximum average variation over the test period ± 2 K;
— maximum individual variation during the tests ± 2 K;
— electrical supply voltage: (230 ± 2) V (single phase).
4.2 Measurement uncertainties
4.2.1 General

Except where otherwise stated in the clauses describing the tests, the uncertainties of measurements carried

out shall not be greater than the maximum uncertainties indicated below.

The standard deviations shall be evaluated taking into account the various sources of uncertainty:

contribution from the instrument, repeatability, calibration, ambient conditions, etc.

— water flow rate: ± 1 %;
— gas flow rate: ± 1 %;
— time: ± 0,2 s;
— temperatures:
— ambient: ± 1 K;
— water: ± 0,5 K;
— gas: ± 0,5 K;
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SIST EN 13203-2:2019
EN 13203-2:2018 (E)
— gas pressure: ± 1 %;
— gas calorific value: ± 1 %;
— gas density: ± 0,5 %;
— electrical energy: ± 2 %.

The stated measurement uncertainties relate to individual measurements. For measurements that combine a

number of individual measurements, smaller uncertainties on the individual measurements may be necessary

to ensure a total uncertainty within ± 2 % under the steady state conditions as defined by 4.2.2.

These uncertainties correspond to two standard deviations (2σ).
4.2.2 Steady state conditions

Steady state operating conditions are regarded as established when the appliance operates for sufficient time

to reach thermal stabilization.

To reach the steady state the water temperature at the outlet of the appliance shall not vary by more than ±

0,5 K.

NOTE This condition can be reached with a gas which is different from the reference gas, provided that the

appliance is supplied with the reference gas for at least 5 min before the requirements are verified.

4.3 Test conditions
4.3.1 General

Except where otherwise stated, the appliance is tested under the following conditions.

For combination gas boiler, the tests shall be carried out only in summer mode as defined in 3.3, and the

appliance shall be set in summer mode.

For all tests defined by this standard, the same adjustment of the appliance shall be maintained.

The load profile used for the measurement shall be the one declared according to the technical instruction of

the appliance (see also Annex C).

The tests shall be performed in the setting in which the appliance is delivered, and which is documented as

such in the technical instructions.

If there are temporary user's settings (automatically self-resetting within 24 h), these shall not be active.

4.3.2 Test room

The appliance shall be installed in a well-ventilated, draught-free room (air speed less than 0,5 m/s).

The appliance shall be protected from direct solar radiation and radiation from heat generators.

4.3.3 Water supply
For the tests:

— the domestic water pressure is the static inlet pressure under dynamic conditions measured as close as

possible to the appliance (see Figure B.2);

— the inlet and outlet temperatures of the domestic water shall be measured in the centre of the flow and as

close as possible to the appliance (see Figure B.3) or at the tap.
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SIST EN 13203-2:2019
EN 13203-2:2018 (E)

The inlet temperatures shall be measured immediately upstream of the water inlet connection. Except where

otherwise stated, the outlet temperatures shall be measured immediately downstream of the outlet

connection or, in the case of an appliance with spout delivery, by means of an immersed temperature

measuring device, e.g. a u-tube fitted at the outlet of a tube of the same length as the minimum length of the

spout normally supplied together with the appliance.
Water temperatures shall be measured with a rapid response temperature sensor.
4.3.4 Initial adjustment of the appliance

The appliance shall be installed in accordance with the installation instructions.

The heat input shall be adjusted to within ± 2 % of the nominal domestic hot water heat input.

The adjustment of the appliance water temperature (T ) shall be as follows (see Figure A.1 and Figure A.2):

a) Appliances with an adjustable temperature: the tests shall be carried out at a temperature not greater

than 65 °C, with a minimum temperature increase of 45 K above the water inlet temperature. For the load

profile XS the minimum temperature setting shall be equal to or greater than 35°C (∆T 25 K above water

inlet temperature).

b) Appliances with a fixed temperature: the tests shall be carried out at the temperature specified in the

appliance documentation, with a minimum temperature increase of 45 K above the water inlet

temperature. For the load profile XS the minimum temperature setting shall be equal to or greater than

35°C (∆T 25 K above water inlet temperature)
NOTE The test conditions of 4.3.1 are applicable.

The same conditions of initial adjustment stated in the appliance documentation shall be used for all the tests.

These conditions shall be included in the test report.
4.3.5 Conditions for the determination of the maximum load profile

The measurement of the domestic hot water efficiency shall be performed with the maximum load profile or

the one just below this load profile:

a) Instantaneous appliances shall be set to the nominal heat input as stated on the data plate. If the user

instructions specify that it is possible to adjust the outlet temperature, this temperature shall be set to the

maximum possible value not exceeding 65°C.

b) Storage appliances shall be set to the nominal heat input as stated on the data plate. If the user

instructions specify that different modes are possible to be selected, the one that is able to store more

energy and that delivers more hot water during a 24 hours period shall be used.
NOTE 1 See Annex C (informative).

NOTE 2 In case of declared maximal load profile 3XL or 4XL the load profile for testing should be XXL.

The load profile as used for the domestic hot water performance test shall be stated in the user instructions.

4.3.6 Electrical supply

The appliance shall be supplied with the nominal voltage stated in the installation instructions.

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EN 13203-2:2018 (E)
5 Determination of the energy consumption of the appliance
5.1 General

This clause defines the test methods to be employed in determining the energy consumption of appliances.

5.2 Load profiles

All patterns define a 24 h measurement cycle and within that cycle the starting times and the total energy

content (in kWh equivalent of hot water tapped) of each draw-off are defined.

Furthermore, the draw-off can be characterized in two ways, either “basin” type draw-off versus “continuous

flow” draw-off.

The aim of the “basin” type is to arrive at an average temperature of the tub, so all supplied energy can be

considered useful from the very beginning of the draw-off (minimum useful temperature rise is 0 K). The

temperature rise (ΔTp) to be achieved during tapping, shall be 30 K for floor cleaning and bath and 45 K for

the dish washes.

The aim of the “continuous flow” type is to use only the water with a minimum temperature. For the shower,

household cleaning and large draw-offs a temperature rise of 30 K shall be reached before counting the useful

energy. For the small draw-offs a temperature rise (ΔTm) of 15 K shall be reached.

NOTE 1 The temperature rises (in K) based on 10 °C inlet water temperature stated above are equivalent to the

temperatures (in °C) given by the load profiles tables in Regulations n° 811/2013, n° 812/2013, n° 813/2013 and n°

814/2013. The tapping flow rates used to perform the different draw-offs of each of the eight load profiles are defined by

Tables 1 to 8.

When these water draw-off flow rates result in a tapping period of less than 15 s the water flow rate should

be decreased such that the tapping period is (16 ± 1) s.

In the load profiles, the requirements for water flow rate and temperatures are based on the delivery at the

tap in a mix of hot and cold water. Under the conditions of the initial adjustment, the appliance itself produces

hot water with a minimum temperature rise of 45 K. For the load profile XS the minimum temperature setting

shall be equal to or greater than 35°C (∆T 25 K above water inlet temperature).

To fulfil the requirements stated in Tables 1 to 8 mixing hot water from the appliance with cold water of 10 °C

at the tap is allowed either by using a mixing device (see Figures B.1 and B.5) or by recalculating the appliance

flow rate (D ) according to the following formula:
min
useful
D = D (1)
min useful
where

D is the minimum test rig setting for the appliance flow rate of each individual draw-off

min
at temperature rise corresponding to ΔT , in l/min;
D is the useful water flow rate according to Tables 1 to 8, in l/min;
useful
ΔT is the appliance water temperature rise, with a minimum of 30 K;

ΔT is the higher value between the temperature rise to be achieved and the minimum

useful
temperature rise for counting the useful energy according to Tables 1 to 8.

If the appliance cannot deliver these flow rates, for instance due to the flow restrictor, it shall be checked that

the requirements are fulfilled by checking that (D ) is delivered.
min

If by design the appliance is fitted with a flow restrictor, the tests shall be carried out with this flow restrictor.

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The tests shall be performed by using the useful water flow rates defined by Tables 1 to 8.

Table 1 — Load profile XS
Start Energy Type of draw-off Useful ΔTp to be Minimum
Draw-off
n° (kWh) water flow achieved ΔTm for
(h:min)
rate at the during counting
tap tapping useful energy
(l/min) (K) (K)
1 07:30 0,525 Medium 3 25
2 12:45 0,525 Medium 3 25
3 20:30 1,050 Large 3 25
Q 2,100
ref
Equivalent hot water litres at 60°C 36
Table 2 — Load profile S
Draw-off Start Energy Type of draw-off Useful ΔTp to be Minimum
n° (kWh) water flow achieved ΔTm for
(h:min)
rate at the during counting
tap tapping useful energy
(l/min) (K) (K)
1 07:00 0,105 Small 3 15
2 07:30 0,105 Small 3 15
3 08:30 0,105 Small 3 15
4 09:30 0,105 Small 3 15
5 11:30 0,105 Small 3 15
6 11:45 0,105 Small 3 15
7 12:45 0,315 Dish washing n°1 4 45 0
8 18:00 0,105 Small 3 15
9 18:15 0,105 Household cleaning 3 30
10 20:30 0,420 Dish washing n°2 4 45 0
11 21:30 0,525 Large 5 35
Q 2,100
ref
...

SLOVENSKI STANDARD
SIST EN 13203-2:2019
01-april-2019
1DGRPHãþD
SIST EN 13203-2:2015
Plinske gospodinjske naprave za pripravo tople sanitarne vode - 2. del:
Ocenjevanje zmogljivosti rabe energije
Gas-fired domestic appliances producing hot water - Part 2: Assessment of energy
consumption

Gasbeheizte Geräte für die sanitäre Warmwasserbereitung für den Hausgebrauch - Teil

2: Bewertung des Energieverbrauchs

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

gazeux - Partie 2 : Evaluation de la consommation énergétique
Ta slovenski standard je istoveten z: EN 13203-2:2018
ICS:
91.140.65 Oprema za ogrevanje vode Water heating equipment
SIST EN 13203-2:2019 en,fr,de

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

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SIST EN 13203-2:2019
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SIST EN 13203-2:2019
EN 13203-2
EUROPEAN STANDARD
NORME EUROPÉENNE
December 2018
EUROPÄISCHE NORM
ICS 91.140.65 Supersedes EN 13203-2:2015
English Version
Gas-fired domestic appliances producing hot water - Part
2: Assessment of energy consumption

Appareils domestiques produisant de l'eau chaude Gasbeheizte Geräte für die sanitäre

sanitaire utilisant les combustibles gazeux - Partie 2 : Warmwasserbereitung für den Hausgebrauch - Teil 2:

Évaluation de la consommation énergétique Bewertung des Energieverbrauchs
This European Standard was approved by CEN on 26 October 2018.

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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,

Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2018 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 13203-2:2018 E

worldwide for CEN national Members.
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EN 13203-2:2018 (E)
Contents Page

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

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

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

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

3 Terms and definitions ................................................................................................................................... 6

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 ................................................................................................................................. 9

4.3 Test conditions ................................................................................................................................................. 9

4.3.1 General ................................................................................................................................................................ 9

4.3.2 Test room ........................................................................................................................................................... 9

4.3.3 Water supply ..................................................................................................................................................... 9

4.3.4 Initial adjustment of the appliance ........................................................................................................ 10

4.3.5 Conditions for the determination of the maximum load profile ................................................. 10

4.3.6 Electrical supply ........................................................................................................................................... 10

5 Determination of the energy consumption of the appliance ........................................................ 11

5.1 General ............................................................................................................................................................. 11

5.2 Load profiles .................................................................................................................................................. 11

5.3 Determination of the energy recovered by the useful water ....................................................... 18

5.4 Calculation of gas energy ........................................................................................................................... 19

5.4.1 Calculation of daily gas energy consumption in summer mode .................................................. 19

5.4.2 Calculation of daily gas energy consumption in winter mode ..................................................... 19

5.4.3 Daily gas energy consumption seasonally weighted ....................................................................... 20

5.5 Calculation of daily electrical energy consumption ........................................................................ 20

5.6 Measurement of energy consumption in standby mode ................................................................ 21

5.6.1 General ............................................................................................................................................................. 21

5.6.2 Calculation of daily gas energy consumption in standby mode .................................................. 21

5.6.3 Calculation of daily auxiliary electrical energy consumption in standby mode ................... 22

5.7 Determination of daily auxiliary electrical energy consumption in off mode ....................... 22

6 Determination of the ratio of wasted water to total water ........................................................... 22

7 Eco design Related Products Data .......................................................................................................... 23

7.1 Water heating energy efficiency ............................................................................................................. 23

7.2 Annual fuel consumption (AFC) .............................................................................................................. 24

7.3 Annual electricity consumption (AEC) ................................................................................................. 25

7.4 Mixed water at 40°C (V40) for storage water heaters .................................................................... 25

Annex A (informative) Test conditions ............................................................................................................ 28

Annex B (informative) Test rig and measurement devices ...................................................................... 31

B.1 General ............................................................................................................................................................. 31

B.2 Pressure measurement .............................................................................................................................. 32

B.3 Temperature measurement ..................................................................................................................... 32

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Annex C (informative) Declaration of the Maximum Load Profile ........................................................... 36

Annex ZA (informative) Relationship between this European Standard and the ecodesign

requirements of Commission Regulation (EU) n° 814/2013 [OJEU L239 of 6 September

2013] aimed to be covered ........................................................................................................................ 37

Annex ZB (informative) Relationship between this European Standard and the energy labelling

requirements of Commission Delegated Regulation (EU) No 812/2013 [OJEU L239 of 6

September 2013] aimed to be covered ................................................................................................. 38

Annex ZC (informative) Relationship between this European Standard and the ecodesign

requirements of Commission Regulation (EU) n° 813/2013 [OJEU L239 of 6 September

2013] aimed to be covered ........................................................................................................................ 39

Annex ZD (informative) Relationship between this European Standard and the energy labelling

requirements of Commission Delegated Regulation (EU) No 811/2013 [OJEU L239 of 6

September 2013] aimed to be covered ................................................................................................. 40

Bibliography ................................................................................................................................................................. 41

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EN 13203-2:2018 (E)
European foreword

This document (EN 13203-2:2018) 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 June 2019, and conflicting national standards shall be withdrawn at

the latest by June 2019.

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 13203-2:2015.
The main technical changes compared to EN 13203-2:2015 are the following:

— improvement of the test conditions (e.g. water supply, initial adjustment of the appliance);

— addition of further load profile XS for small appliances;

— addition of new clause dealing with mixed water at 40°C (V40) for storage water heaters and

corresponding complement to Annex ZA (informative);

— addition of new Annex C (informative) dealing with the declaration of the maximum load profile.

The main purpose of this revision is to provide a means of conforming to requirements of Commission

Delegated Regulation (EC) n° 813/2013, (EC) n° 811/2013, (EC) n° 812/2013 and (EC) n° 814/2013.

This document has been prepared under a mandate given to CEN by the European Commission and the

European Free Trade Association, and supports essential requirements of EU Regulation(s).

For relationship with EU Directive(s), see informative Annex ZA, ZB, ZC or ZD, which are an integral part of

this document.

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, Former Yugoslav Republic of Macedonia, France, Germany, Greece,

Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,

Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.

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Introduction

The safety operation of the boiler or water heater is not covered by this standard. Safety should be proved by

means of the essential safety requirements of the Gas Appliances Regulation 2016/426/UE. This may 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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1 Scope

This document is applicable to gas-fired appliances producing domestic hot water. It applies to both

instantaneous and storage tank appliances; waters-heaters and combination boilers that have:

— a heat input not exceeding 400 kW; and
— a hot water storage tank capacity (if any) not exceeding 2000 l.

In the case of combination boilers, with or without storage tank, domestic hot water production is integrated

or coupled, the whole being marketed as a single unit.

EN 13203-1 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 system for presenting the information to the user. The present

document sets out a method for assessing the energy performance of the appliances. It defines a number of

daily load profiles for each domestic hot water use, kitchen, shower, bath and a combination of these, together

with corresponding test procedures, enabling the energy performances of different gas-fired appliances to be

compared and matched to the needs of the user. Where other technologies are combined with a gas-fired

boiler or a water heater to produce domestic hot water, specific parts of EN 13203 apply.

2 Normative references
There are no normative references in this document.
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
storage tank
reservoir for domestic hot water
3.2
nominal domestic hot water heat input (Q )

value of the heat input for the production of domestic hot water stated in the instructions

— Symbol: Q
— Unit: kilowatt (kW)
3.3
summer mode

conditions during which the appliance supplies energy only for the production of domestic hot water

3.4
winter mode

conditions during which the combination boiler supplies energy for the production of domestic hot water and

space heating
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3.5
domestic water test temperature
temperature of the delivered water at which the tests are conducted
3.6
control cycle

the time cycle for keeping components and/or the storage tank (if any) of the domestic hot water circuit at

predetermined temperature level, consists of an «ON» duration time during which the heating of the domestic

hot water (by gas energy and/or auxiliary energy) is operating, and an «OFF» duration time during which no

heating occurs
3.7
useful water

quantity of water delivered at the tap for which the temperature increase is in accordance with the

requirement fixed for each individual delivery of the load profiles
3.8
wasted water

quantity of water delivered at the tap for which the temperature increase is not in accordance with the

requirement fixed for each individual delivery of the load profiles
3.9
stand by mode

operating state in which the appliance can provide domestic hot water at any time

Note 1 to entry: In the case of an appliance with a control cycle for keeping components and/or the storage tank (if

any) of the domestic hot water circuit at predetermined temperature level no draw-off is made.

3.10
off mode

state of an appliance, selected by the user, in which domestic hot water cannot be provided

3.11
useful water flow rate (D )
useful

quantity of water delivered by unit time at the tap for which the temperature increase is in accordance with

the requirement fixed for each individual draw-off of the load profiles
3.12
useful water temperature
water temperature, expressed in degrees Celsius, delivered at the tap
3.13
appliance flow rate

quantity of water delivered by the appliance by unit time before the mixing device, if applicable

3.14
appliance water temperature (T )

water temperature, expressed in degrees Celsius, delivered by the appliance before the mixing device

3.15
water temperature rise (∆T ) in K

difference between the useful water temperature and the cold water temperature, at which hot water is

contributing to the reference energy as specified in the load profiles
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3.16
water temperature rise for basin draw-off types (∆T ) in K

difference between the useful water temperature and the cold water temperature, to be achieved during the

water draw-offs, with a minimum value as specified in the load profiles

Note 1 to entry: The minimum temperature difference for basin draw-offs as specified in the load profiles shall be

achieved at least once during the water draw-offs.
3.17
rapid response temperature sensor

measuring instrument with a response time such that 90 % of the final temperature rise, from 15 °C to 100 °C,

is obtained within about 1 s, when the sensor is plunged into still water
4 General test conditions
4.1 Reference conditions
Unless otherwise stated, the general test conditions shall be as follows:
— cold water temperature: 10 °C;
— maximum average variation over the test period: ± 2 K;
— cold water pressure: (2 ± 0,1) bar;
— ambient air temperature: 20 °C;
— maximum average variation over the test period ± 2 K;
— maximum individual variation during the tests ± 2 K;
— electrical supply voltage: (230 ± 2) V (single phase).
4.2 Measurement uncertainties
4.2.1 General

Except where otherwise stated in the clauses describing the tests, the uncertainties of measurements carried

out shall not be greater than the maximum uncertainties indicated below.

The standard deviations shall be evaluated taking into account the various sources of uncertainty:

contribution from the instrument, repeatability, calibration, ambient conditions, etc.

— water flow rate: ± 1 %;
— gas flow rate: ± 1 %;
— time: ± 0,2 s;
— temperatures:
— ambient: ± 1 K;
— water: ± 0,5 K;
— gas: ± 0,5 K;
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— gas pressure: ± 1 %;
— gas calorific value: ± 1 %;
— gas density: ± 0,5 %;
— electrical energy: ± 2 %.

The stated measurement uncertainties relate to individual measurements. For measurements that combine a

number of individual measurements, smaller uncertainties on the individual measurements may be necessary

to ensure a total uncertainty within ± 2 % under the steady state conditions as defined by 4.2.2.

These uncertainties correspond to two standard deviations (2σ).
4.2.2 Steady state conditions

Steady state operating conditions are regarded as established when the appliance operates for sufficient time

to reach thermal stabilization.

To reach the steady state the water temperature at the outlet of the appliance shall not vary by more than ±

0,5 K.

NOTE This condition can be reached with a gas which is different from the reference gas, provided that the

appliance is supplied with the reference gas for at least 5 min before the requirements are verified.

4.3 Test conditions
4.3.1 General

Except where otherwise stated, the appliance is tested under the following conditions.

For combination gas boiler, the tests shall be carried out only in summer mode as defined in 3.3, and the

appliance shall be set in summer mode.

For all tests defined by this standard, the same adjustment of the appliance shall be maintained.

The load profile used for the measurement shall be the one declared according to the technical instruction of

the appliance (see also Annex C).

The tests shall be performed in the setting in which the appliance is delivered, and which is documented as

such in the technical instructions.

If there are temporary user's settings (automatically self-resetting within 24 h), these shall not be active.

4.3.2 Test room

The appliance shall be installed in a well-ventilated, draught-free room (air speed less than 0,5 m/s).

The appliance shall be protected from direct solar radiation and radiation from heat generators.

4.3.3 Water supply
For the tests:

— the domestic water pressure is the static inlet pressure under dynamic conditions measured as close as

possible to the appliance (see Figure B.2);

— the inlet and outlet temperatures of the domestic water shall be measured in the centre of the flow and as

close as possible to the appliance (see Figure B.3) or at the tap.
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The inlet temperatures shall be measured immediately upstream of the water inlet connection. Except where

otherwise stated, the outlet temperatures shall be measured immediately downstream of the outlet

connection or, in the case of an appliance with spout delivery, by means of an immersed temperature

measuring device, e.g. a u-tube fitted at the outlet of a tube of the same length as the minimum length of the

spout normally supplied together with the appliance.
Water temperatures shall be measured with a rapid response temperature sensor.
4.3.4 Initial adjustment of the appliance

The appliance shall be installed in accordance with the installation instructions.

The heat input shall be adjusted to within ± 2 % of the nominal domestic hot water heat input.

The adjustment of the appliance water temperature (T ) shall be as follows (see Figure A.1 and Figure A.2):

a) Appliances with an adjustable temperature: the tests shall be carried out at a temperature not greater

than 65 °C, with a minimum temperature increase of 45 K above the water inlet temperature. For the load

profile XS the minimum temperature setting shall be equal to or greater than 35°C (∆T 25 K above water

inlet temperature).

b) Appliances with a fixed temperature: the tests shall be carried out at the temperature specified in the

appliance documentation, with a minimum temperature increase of 45 K above the water inlet

temperature. For the load profile XS the minimum temperature setting shall be equal to or greater than

35°C (∆T 25 K above water inlet temperature)
NOTE The test conditions of 4.3.1 are applicable.

The same conditions of initial adjustment stated in the appliance documentation shall be used for all the tests.

These conditions shall be included in the test report.
4.3.5 Conditions for the determination of the maximum load profile

The measurement of the domestic hot water efficiency shall be performed with the maximum load profile or

the one just below this load profile:

a) Instantaneous appliances shall be set to the nominal heat input as stated on the data plate. If the user

instructions specify that it is possible to adjust the outlet temperature, this temperature shall be set to the

maximum possible value not exceeding 65°C.

b) Storage appliances shall be set to the nominal heat input as stated on the data plate. If the user

instructions specify that different modes are possible to be selected, the one that is able to store more

energy and that delivers more hot water during a 24 hours period shall be used.
NOTE 1 See Annex C (informative).

NOTE 2 In case of declared maximal load profile 3XL or 4XL the load profile for testing should be XXL.

The load profile as used for the domestic hot water performance test shall be stated in the user instructions.

4.3.6 Electrical supply

The appliance shall be supplied with the nominal voltage stated in the installation instructions.

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5 Determination of the energy consumption of the appliance
5.1 General

This clause defines the test methods to be employed in determining the energy consumption of appliances.

5.2 Load profiles

All patterns define a 24 h measurement cycle and within that cycle the starting times and the total energy

content (in kWh equivalent of hot water tapped) of each draw-off are defined.

Furthermore, the draw-off can be characterized in two ways, either “basin” type draw-off versus “continuous

flow” draw-off.

The aim of the “basin” type is to arrive at an average temperature of the tub, so all supplied energy can be

considered useful from the very beginning of the draw-off (minimum useful temperature rise is 0 K). The

temperature rise (ΔTp) to be achieved during tapping, shall be 30 K for floor cleaning and bath and 45 K for

the dish washes.

The aim of the “continuous flow” type is to use only the water with a minimum temperature. For the shower,

household cleaning and large draw-offs a temperature rise of 30 K shall be reached before counting the useful

energy. For the small draw-offs a temperature rise (ΔTm) of 15 K shall be reached.

NOTE 1 The temperature rises (in K) based on 10 °C inlet water temperature stated above are equivalent to the

temperatures (in °C) given by the load profiles tables in Regulations n° 811/2013, n° 812/2013, n° 813/2013 and n°

814/2013. The tapping flow rates used to perform the different draw-offs of each of the eight load profiles are defined by

Tables 1 to 8.

When these water draw-off flow rates result in a tapping period of less than 15 s the water flow rate should

be decreased such that the tapping period is (16 ± 1) s.

In the load profiles, the requirements for water flow rate and temperatures are based on the delivery at the

tap in a mix of hot and cold water. Under the conditions of the initial adjustment, the appliance itself produces

hot water with a minimum temperature rise of 45 K. For the load profile XS the minimum temperature setting

shall be equal to or greater than 35°C (∆T 25 K above water inlet temperature).

To fulfil the requirements stated in Tables 1 to 8 mixing hot water from the appliance with cold water of 10 °C

at the tap is allowed either by using a mixing device (see Figures B.1 and B.5) or by recalculating the appliance

flow rate (D ) according to the following formula:
min
useful
D = D (1)
min useful
where

D is the minimum test rig setting for the appliance flow rate of each individual draw-off

min
at temperature rise corresponding to ΔT , in l/min;
D is the useful water flow rate according to Tables 1 to 8, in l/min;
useful
ΔT is the appliance water temperature rise, with a minimum of 30 K;

ΔT is the higher value between the temperature rise to be achieved and the minimum

useful
temperature rise for counting the useful energy according to Tables 1 to 8.

If the appliance cannot deliver these flow rates, for instance due to the flow restrictor, it shall be checked that

the requirements are fulfilled by checking that (D ) is delivered.
min

If by design the appliance is fitted with a flow restrictor, the tests shall be carried out with this flow restrictor.

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EN 13203-2:2018 (E)

The tests shall be performed by using the useful water flow rates defined by Tables 1 to 8.

Table 1 — Load profile XS
Start Energy Type of draw-off Useful ΔTp to be Minimum
Draw-off
n° (kWh) water flow achieved ΔTm for
(h:min)
rate at the during counting
tap tapping useful energy
(l/min) (K) (K)
1 07:30 0,525 Medium 3 25
2 12:45 0,525 Medium 3 25
3 20:30 1,050 Large 3 25
Q 2,100
ref
Equivalent hot water litres at 60°C 36
Table 2 — Load profile S
Draw-off Start Energy Type of draw-off Useful ΔTp to be Minimum
n° (kWh) water flow achieved ΔTm for
(h:min)
rate at the during counting
tap tapping useful energy
(l/min) (K) (K)
1 07:00 0,105 Small 3 15
2 07:30 0,105 Small 3 15
3 08:30 0,105 Small 3 15
4 09:30 0,105 Small 3 15
5 11:30 0,105 Small 3 15
6 11:45 0,105 Small 3 15
7 12:45 0,315 Dish washing n°1 4 45 0
8 18:00 0,105 Small 3 15
9 18:15 0,105 Household cleaning 3 30
10 20:30 0,420 Dish washing n°2 4 45 0
11 21:30 0,525
...

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