Bsi bs en 50193 2 1 2016

If the flow rate V90%P cannot be obtained, the flow rate at a pressure difference of 0,1 MPa is defined to be 100 % If the Inlet temperature deviates more than 1 K from 15 °C, a correct

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Electric instantaneous water heaters

Part 2-1: Methods for measuring the performance — Multifunctional electric instantaneous water heaters

BSI Standards Publication

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This British Standard is the UK implementation of EN50193-2-1:2016.

The UK participation in its preparation was entrusted to TechnicalCommittee CPL/59, Performance of household electrical appliances

A list of organizations represented on this committee can beobtained on request to its secretary

This publication does not purport to include all the necessaryprovisions of a contract Users are responsible for its correctapplication

ISBN 978 0 580 86397 4ICS 91.140.65

Compliance with a British Standard cannot confer immunity from legal obligations.

This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 May 2016

Amendments issued since publication

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NORME EUROPÉENNE

English Version Electric instantaneous water heaters - Part 2-1: Methods for

measuring the performance - Multifunctional electric

instantaneous water heaters

Chauffe-eau électriques instantanés - Partie 2-1: Méthodes

de mesure de l'aptitude à la fonction - Chauffe-eau

électriques instantanés multifonctions

Elektro-Durchfluss-Wassererwärmer - Teil 2 1: Verfahren zur Messung der Gebrauchseigenschaften - Multifunktionelle Elektro-Durchfluss-Wassererwärmer

This European Standard was approved by CENELEC on 2016-03-28 CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CENELEC member

This European Standard exists in three official versions (English, French, German) A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom

European Committee for Electrotechnical Standardization Comité Européen de Normalisation Electrotechnique Europäisches Komitee für Elektrotechnische Normung

CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels

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Contents Page

European foreword 4

1 Scope 5

2 Normative references 5

3 Terms and definitions 5

4 General test conditions 7

4.4 Test setup 8

4.101 Time constants (measuring time) 8

4.102 Test setup 8

4.102.1 Measurement setup 8

4.102.2 Set points 8

4.102.3 Measurement of flow pressure and flow rate 8

4.102.4 Temperature measurement 8

5 Energy efficiency 8

6.101 Performance tests 8

6.101.1General 8

6.101.2Determination of flow rates 8

6.101.2.1Introduction 8

6.101.2.2Electronically controlled or regulated appliances 9

6.101.2.3Hydraulically controlled appliances 9

6.101.2.4Determination of the flow rate as a function of the pressure difference 10

6.101.3Pressure difference on activation of the heating capacity 10

6.101.4Behaviour at switch-on of the appliance 11

6.101.5Behaviour following the change of the flow rate 12

6.101.6Behaviour following interruption of the flow 14

6.101.7Behaviour at constant temperature setting 15

6.101.8Behaviour following the change of the temperature selector setting 16

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6.101.8.2 Electronically controlled appliances 16

6.101.9Behaviour at voltage limits 17

7.101 Additional tests for electronic instantaneous water heaters 18

7.101.1General 18

7.101.2Behaviour of the outlet temperature at decreasing water inlet temperature 18

7.101.3Behavior of the outlet temperature at changing water inlet temperature 19

Annex A (normative) Load pattern 20

Annex B (normative) Test setup 21

Annex ZZA (informative) Relationship between this European Standard and the energy labelling requirements of Commission Delegated Regulation (EU) No 812/2013 aimed to be covered 25

Annex ZZB (informative) Relationship between this European Standard and the ecodesign requirements of Commission Regulation (EU) No 814/2013 aimed to be covered 26

Bibliography 27

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European foreword

This document (EN 50193-2-1:2016) has been prepared by CLC/TC 59X "Performance of household and similar electrical appliances"

The following dates are proposed:

• latest date by which this document has to be

implemented at national level by publication of

an identical national standard or by

endorsement

• latest date by which the national standards

conflicting with this document have to

be withdrawn

This document is to be read in conjunction with EN 50193-1:2013

Clauses, subclauses, notes, tables and figures which are additional to those in EN 50193-1:2013 are numbered starting from 101

This document has been prepared under a mandate given to CENELEC by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive(s)

For the relationship with EU Directive(s) see informative Annex ZZA and ZZB, which are integral parts of this document

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1 Scope

This clause of Part 1 is applicable with the following exception:

This European Standard applies to electrical instantaneous water heaters designed to operate as multifunctional appliances with electric rated power >2 kW

This European Standard specifies tests for the assessment of the performance

2 Normative references

This clause of Part 1 is applicable with the following exception:

Addition:

EN 50193-1:2013, Electric instantaneous water heaters - Part 1: General requirements

3 Terms and definitions

This clause of Part 1 is applicable with the following exceptions:

flow pressure on activation of the heating capacity

pressure drop in the instantaneous water heater, at which the heating capacity is, and remains, activated

3.103

90% method

usually a physical value is reaching a final (average) value in an asymptotic manner To reach a valid measurement result, a stop point of the measurement has to be defined The measurement is stopped, if the value finally has reached 90% of the difference between (average) starting value and (average) final value

3.104

10%/90% method

usually a physical value is changing with a time delay in an asymptotic manner between starting value and final value To reach a valid measurement result, a starting point and a stop point have to be defined for the measurement The measurement is started, if the physical value has first reached 10% of the difference between (average) starting value and (average) final value The measurement is stopped, if the value finally has reached 90% of the difference

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Figure 101 3.105

response time

time interval between the beginning of the changing of a value or parameter and the moment a steady state condition has obtained The 90% method has to be used

3.106

volume flow rate/water flow rate

flow rate of water expressed in l/min

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After Clause 3, add the following new clause:

101 Symbols and units

For the purposes of this document, the following symbols and units apply

Table 101 – Symbols and units

Tmin °C The minimum setting of the temperature setting mechanism settable by user at which the

appliance does heat

If no user accessible temperature selector is available, the relevant measurements with

Tmin are not performed

T38 °C Standard hot water temperature set point for various tests: 38°C If the temperature setting

mechanism settable by user does not permit an outlet temperature setting of 38 °C, a temperature as close as possible above 38°C as possible shall be chosen This temperature shall be stated in the test report and shall be used for any further measurements, instead of 38 °C

The positions of the temperature setting mechanism shall be marked for reproducible

settings, taking into consideration the fact that T38 settings may dependent on the direction

of the rotation of a knob

If no user accessible temperature selector is available, the temperature factory setting is

defined to be the T38.setting

Tmax °C The maximum setting of the temperature setting mechanism settable by the user

If no user accessible temperature selector is available, the relevant measurements with

Tmax are not performed

Tpmin °C Temperature at the minimum permanent setting of the power selector settable by user at

which the appliance does heat

If no user accessible power selector is available, the relevant measurements with Tpmin are not performed

Tpmax °C Temperature at the maximum permanent setting of the power selector settable by user

If no user accessible power selector is available, the temperature factory setting is defined

to be the Tpmax setting

90%P

V ℓ/min The flow-rate where the power consumption is 90% of rated power at T38 and an

inlet-temperature of 15 °C

V

K factor The correction value for V90%P if the inlet temperature differs by more than 1K from 15 °C

T m °C Temperature from which counting of useful energy content starts

T p °C Minimum (peak) temperature to be achieved during tapping

T cold °C Cold water inlet temperature

f l/min Minimum flow rate to be reached during tapping

P min kW Minimum required instantaneous heating power to fulfil tapping

t d second Tapping duration

P real kW Minimum requited heating power of the appliance

P nom kW Nominal heating power of the appliance

Q nom kWh Nominal daily energy consumtion of the appliance

Q r kWh Real daily energy consumtion of the appliance

4 General test conditions

This clause of Part 1 is applicable with following exceptions:

Modification:

The cold water temperature Tcold shall be 15 °C ± 5 K for the performance tests according to Clause 102ff

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4.4 Test setup

This subclause of Part 1 is not applicable

Addition:

4.101 Time constants (measuring time)

Time constants shall be determined by means of the 10/90 % method

4.102 Test setup

4.102.1 Measurement setup

The appliance shall be fixed in accordance with the installation instructions

The measurement setup shall correspond to Figure B.101 for open-outlet appliances (single point) and to Figure B.102 for closed-outlet (multi point) appliances

4.102.2 Set points

Unless no specific setpoints for the individual test are defined:

All non-user adjustable setpoints shall be adjusted according to manufacturer instructions for a standard setup

User adjustable selectors have to be set as follows:

– If the appliance has a power selector, the selector shall be adjusted to the highest value

– If the appliance has a temperature independent flow selector, it shall be adjusted to the highest value – If the appliance has a flow independent temperature selector, it shall be adjusted to the highest value – All other selectors shall be set according to manufacturer instructions

4.102.3 Measurement of flow pressure and flow rate

Flow pressure and flow rate shall be measured in accordance to Annex B Flow pressure shall be determined by measuring the pressure difference

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6.101.2.2 Electronically controlled or regulated appliances

The appliance is operated under the boundary conditions of EN 50193-1:2013, Table 1

Set flow rate to V90%P

– Closed outlet appliances: The water pressure difference shall be increased up to the half of the nominal pressure of the appliance, if necessary If the flow rate V90%P cannot be obtained, the flow rate at pressure difference of half nominal pressure of the appliance is defined to be 100 %

– Open outlet appliances: 0,1 MPa is the maximum useable pressure If the flow rate V90%P cannot be obtained, the flow rate at a pressure difference of 0,1 MPa is defined to be 100 %

If the Inlet temperature deviates more than 1 K from 15 °C, a correction factor KV has to be included:

6.101.2.3 Hydraulically controlled appliances

The flow-rate shall be increased until the outlet temperature reaches the value of 38 °C If this flow rate is not

to be obtained, the water pressure shall be increased until the pressure difference has reached the half of the nominal pressure of the appliance For single point appliances 0,1 MPa is the maximum pressure to be increased

Nominal values have to be determined and recorded

This value is taken to be 100 %

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Table 103 – Nominal values for hydraulically controlled appliances

6.101.2.4 Determination of the flow rate as a function of the pressure difference

The flow rates shall be determined at pressure differences given in Table 104 and in Table 105 All flow limiting devices shall be fully opened The measurement shall be carried out without supply voltage

Table 104 – Flow pressure and flow rate for multi point appliances Pressure difference

The temperature selector shall be set to the temperature setting T38

The flow rate shall be steadily increased until the heating capacity is activated The required pressure difference and the associated flow rate shall be given in Table 106

Table 106 – Pressure difference and flow rate Outlet temperature

The pressure difference shall be steadily increased until the heating capacity is activated or switched over and remains permanently activated The necessary flow pressure and the corresponding flow rate shall be determined

These measurements shall be carried out with the minimum (T pmin ) and the maximum (T pmax) permanent settings of the power and temperature selector which can be set by the user

The pressure difference and the flow rate shall be given in Table 107

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Table 107 – Pressure difference and flow rate Outlet temperature

The withdrawal device has to be opened within 0,5 seconds

Prior to and between the measurements a flow rate shall be set at which the appliance does not switch on The flow rate shall be maintained until the inlet and the outlet temperatures do no longer differ by more than

2 K Following this the flow shall be interrupted

The hydraulic conditions for a flow rate setting of 50 %, 75 % and 100 % shall be determined for the

temperature selector setting T38 These hydraulic conditions shall be also used for measurements applying

Tmin and Tmax The functioning of automatically flow-rate limiting devices shall not be interfered with The actual determined flow rate values are entered into Table 108

The heating-up duration starts as soon as the withdrawal device is opened

If steady state condition has been reached, the measurement is continued for at least 1 additional minute to determine the respective temperature mean value

The heating-up duration is considered as complete once the water outlet temperature has reached the mean value -1K

The values shall be entered into Table 108

Table 108 – Behaviour at switch-on of the appliance at different temperature selector settings Temperature

selector

setting

Flow rate setting

%

flow-rate l/min

Heating-up duration seconds

Outlet temperature, actual value

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Prior to and between the measurements a flow rate shall be set at which the appliance does not switch on The flow rate shall be maintained until the inlet and the outlet temperatures do no longer differ by more than

2 K Following this the flow shall be interrupted

The heating-up duration starts as soon as the withdrawal device is opened First of all wait until the temperature reaches steady state, then measure for at least another minute in order to determine the mean value

The response time is determined by using the 10%/90% method

The missing data shall be entered into Table 109

Table 109 – Behaviour at switch-on of the appliance at different settings Temperature selector

setting (according to 102.1.2) Flow rate setting

l/min

Heating-up duration seconds Outlet temperature, actual value

The purpose of this test is to determine the behaviour of the appliance at varying flow rates

The changeover of the flow rates shall be done in less than 0,5 seconds

Following increasing or decreasing the flow rate, the response time and the temperature deviation of the water outlet temperature shall be determined as a function of the temperature selector setting

Both before and after the flow rate was changed, wait until the temperature reaches steady state, then measure for at least another minute in order to create a mean value of the temperature before and after changing the flow-rate From the temperature profile occurring after steady state has been reached the respective mean value of the outlet temperature shall be determined If these mean values of the temperature at both different flow-rates differ by more than 1 K from each other, then no value shall be indicated for the response time For the maximum temperature selector setting the admissible deviation is

2 K

The hydraulic conditions for a flow rate setting of 50 %, 75 % and 100 % shall be determined for the

temperature selector setting T38 (automatically operating flow-rate limiting devices should be in position “fully

open”) These hydraulic conditions shall also be used for measurements applying Tmax The functioning of automatically flow-rate limiting devices shall not be affected by The actual determined flow rate values are entered into Table 110

The response time starts if the water outlet temperature leaves the mean value by more than ± 1 K (+-2K at maximum temperature selector setting) and ends when this temperature enters the new mean value with 1K deviation (+-2K at maximum temperature selector setting)

The temperature deviation shall be given in the form of both the maximum positive and the maximum negative deviations of the water outlet temperature from the mean value after having changed the flow rate, occurring during response time

The data shall be entered into Table 110

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Table 110 – Behaviour following the change of the flow rate

at different temperature selector settings Temperatur

e selector setting

Flow rate Temperature

deviation during response time

K

Response time temperatur Outlet

e

at steady state

°C

steady state

l/min

T38

100 % - - -

75%

100%

50%

100%

Tmax 100% - - -

75%

100%

50%

100 %

Following the increase or the decrease of the difference pressure, the response time and the temperature deviation of the water outlet temperature shall be determined

Starting at a difference pressure of the half of nominal pressure (0,1 MPa for open outlet appliances) of the device (set to 100 %), reduce the flow rate until the difference pressure is 0,375 *nominal pressure (defined

to be 75 %), 0,25 *nominal pressure (defined to be 50 %) respectively These values shall be entered into Table 111 to carry out the following tests

Both before and after the flow rate was changed, wait until the temperature reaches steady state, then measure for at least another minute in order to create a mean value of the temperature before and after changing the flow-rate From the temperature profile occurring after steady state has been reached the respective mean value of the outlet temperature shall be determined

The temperature deviation shall be given in the form of both the maximum positive and the maximum negative deviations of the water outlet temperature from the mean value after having changed the flow rate, occurring during response time

The 10%/90% method is used to measure the response time

The missing data shall be entered into Table 111

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Table 111 – Behaviour following the change of the flow rate at different settings power

selector

setting

nominal pressure MPa

differenc

e pressure

Temperature deviation during response time

K

Response

Actual value

Outlet temperatur

e

Flow rate Power

T pmax

100 % - - -

75%

100%

50%

100%

T pmin 100% - - -

75%

100%

50%

100 %

6.101.6 Behaviour following interruption of the flow

6.101.6.1 Introduction

The purpose of this test is to determine the behaviour of the appliance following a short-term interruption of the water flow

The changeover of the flow rates shall be done in less than 0,5 seconds

At the temperature selector setting T38 the electronic instantaneous water heater shall be operated at flow rates given in Table 112 including Table 102, and the flows shall be interrupted for 60 seconds

The response time starts as soon as the withdrawal device is re-opened

First of all wait until the temperature reaches steady state, then measure for at least another minute in order

to create a mean value of the temperature before the flow-rate is interrupted The water outlet flow has to be interrupted for 60 seconds and then opened again by the withdrawal device Then wait until the temperature reaches steady state and measure for at least another minute in order to create a new mean value of the temperature From the temperature profile occurring after steady state has been reached the respective mean value of the outlet temperature shall be determined If this mean value after the re-opening of the withdrawal device differs by more than 1 K from mean value from the mean value of temperature before the flow had been interrupted, then no value shall be indicated for the response time

The response time is considered as complete once the water outlet temperature has entered and remained within the error band of ± 1 K

The temperature deviation shall be given in the form of both the maximum positive and the maximum negative deviations of the water outlet temperature from the mean value after the re-opening of the withdrawal device occurring during response time

The data shall be entered into Table 112

Tiêu đề	Electric instantaneous water heaters part 2-1: Methods for measuring the performance — Multifunctional electric instantaneous water heaters
Trường học	British Standards Institution
Chuyên ngành	Standards Publication
Thể loại	publication
Năm xuất bản	2016
Thành phố	Brussels

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