BS EN 50193-2-1:2016 BSI Standards Publication Electric instantaneous water heaters Part 2-1: Methods for measuring the performance — Multifunctional electric instantaneous water heaters BS EN 50193-2-1:2016 BRITISH STANDARD National foreword This British Standard is the UK implementation of EN 50193-2-1:2016 The UK participation in its preparation was entrusted to Technical Committee CPL/59, Performance of household electrical appliances A list of organizations represented on this committee can be obtained on request to its secretary This publication does not purport to include all the necessary provisions of a contract Users are responsible for its correct application © The British Standards Institution 2016 Published by BSI Standards Limited 2016 ISBN 978 580 86397 ICS 91.140.65 Compliance with a British Standard cannot confer immunity from legal obligations This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 May 2016 Amendments issued since publication Date Text affected EUROPEAN STANDARD BS EN 50193-2-1:2016 NORME EUROPÉENNE EUROPÄISCHE NORM EN 50193-2-1 ICS 91.140.65 May 2016 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 Elektro-Durchfluss-Wassererwärmer - Teil 1: Verfahren de mesure de l'aptitude la fonction - Chauffe-eau zur Messung der Gebrauchseigenschaften - électriques instantanés multifonctions 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 © 2016 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members Ref No EN 50193-2-1:2016 E BS EN 50193-2-1:2016 EN 50193-2-1:2016 (E) Contents Page European foreword Scope Normative references Terms and definitions General test conditions 4.4 Test setup .8 4.101 Time constants (measuring time) 4.102 Test setup .8 4.102.1 Measurement setup 4.102.2 Set points 4.102.3 Measurement of flow pressure and flow rate 4.102.4 Temperature measurement Energy efficiency 6.101 Performance tests 6.101.1 General 6.101.2Determination of flow rates 6.101.2.1 Introduction 6.101.2.2Electronically controlled or regulated appliances 6.101.2.3 Hydraulically controlled appliances 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 6.101.3.1 Introduction 10 6.101.3.2Electronically controlled or regulated appliances 10 6.101.3.3Hydraulically controlled appliances 10 6.101.4Behaviour at switch-on of the appliance 11 6.101.4.1 Introduction 11 6.101.4.2Electronically controlled or regulated appliances 11 6.101.4.3Hydraulically controlled appliances 12 6.101.5Behaviour following the change of the flow rate 12 6.101.5.1 Introduction 12 6.101.5.2Electronically controlled or regulated appliances 12 6.101.5.3Hydraulically controlled appliances 13 6.101.6Behaviour following interruption of the flow 14 6.101.6.1 Introduction 14 6.101.6.2Electronically controlled or regulated appliances 14 6.101.6.3Hydraulically controlled appliances 15 6.101.7Behaviour at constant temperature setting 15 6.101.7.1 Introduction 15 6.101.7.2Electronically controlled or regulated appliances 15 6.101.7.3Hydraulically controlled appliances 16 6.101.8Behaviour following the change of the temperature selector setting 16 6.101.8.1 Introduction 16 BS EN 50193-2-1:2016 EN 50193-2-1:2016 (E) 6.101.8.2 Electronically controlled appliances 16 6.101.8.3Hydraulically controlled appliances 17 6.101.9Behaviour at voltage limits 17 7.101 Additional tests for electronic instantaneous water heaters .18 7.101.1 General 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 BS EN 50193-2-1:2016 EN 50193-2-1:2016 (E) 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 (dop) 2017-03-28 implemented at national level by publication of an identical national standard or by endorsement • latest date by which the national standards (dow) 2019-03-28 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 BS EN 50193-2-1:2016 EN 50193-2-1:2016 (E) Scope This clause of Part 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 Normative references This clause of Part is applicable with the following exception: Addition: EN 50193-1:2013, Electric instantaneous water heaters - Part 1: General requirements Terms and definitions This clause of Part is applicable with the following exceptions: Addition: 3.101 setpoint value changeable value which is allocated to the appliance or the individual components thereof 3.102 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 BS EN 50193-2-1:2016 EN 50193-2-1:2016 (E) 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 3.107 heating-up duration time interval between the opening of the withdrawal device and the final outlet temperature is obtained The 90% method has to be used for 3.108 pressure difference difference between pressure at water inlet and water outlet of the appliance at a defined flow rate BS EN 50193-2-1:2016 EN 50193-2-1:2016 (E) 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 Symbol Unit Explanation Tmin °C The minimum setting of the temperature setting mechanism settable by user at which the T38 °C appliance does heat If no user accessible temperature selector is available, the relevant measurements with Tmax °C Tmin are not performed Tpmin °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 Tpmax °C 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 V ℓ/min measurements, instead of 38 °C factor The positions of the temperature setting mechanism shall be marked for reproducible 90% P settings, taking into consideration the fact that T38 settings may dependent on the direction °C of the rotation of a knob KV °C If no user accessible temperature selector is available, the temperature factory setting is °C defined to be the T38.setting Tm l/min Tp kW The maximum setting of the temperature setting mechanism settable by the user Tcold second If no user accessible temperature selector is available, the relevant measurements with f kW Tmax are not performed Pmin kW td kWh Temperature at the minimum permanent setting of the power selector settable by user at Preal kWh which the appliance does heat Pnom If no user accessible power selector is available, the relevant measurements with Tpmin are Qnom not performed Qr 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 The flow-rate where the power consumption is 90% of rated power at T38 and an inlet- temperature of 15 °C V The correction value for 90%P if the inlet temperature differs by more than 1K from 15 °C Temperature from which counting of useful energy content starts Minimum (peak) temperature to be achieved during tapping Cold water inlet temperature Minimum flow rate to be reached during tapping Minimum required instantaneous heating power to fulfil tapping Tapping duration Minimum requited heating power of the appliance Nominal heating power of the appliance Nominal daily energy consumtion of the appliance Real daily energy consumtion of the appliance General test conditions This clause of Part is applicable with following exceptions: Modification: The cold water temperature Tcold shall be 15 °C ± K for the performance tests according to Clause 102ff BS EN 50193-2-1:2016 EN 50193-2-1:2016 (E) 4.4 Test setup This subclause of Part 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 4.102.4 Temperature measurement The inlet and outlet temperatures of the water shall be measured using the setup according to Annex B Energy efficiency This clause of Part is applicable Addition: 6.101 Performance tests 6.101.1 General Smart Instantaneous water heater shall be measured as “Electronically controlled or regulated appliances” all other appliances are measured as “Hydraulically controlled appliances” 6.101.2 Determination of flow rates 6.101.2.1 Introduction The purpose of this test is to determine reference values for further measurements BS EN 50193-2-1:2016 EN 50193-2-1:2016 (E) Table 114 – Behaviour at constant temperature setting Temperature Flow rate Outlet Temperature deviation selector setting temperature K % l/min °C + - T38 50 % 75 % 100 % 6.101.7.3 Hydraulically controlled appliances Not applicable 6.101.8 Behaviour following the change of the temperature selector setting 6.101.8.1 Introduction The purpose of this test is to determine the behaviour of the appliance following the change of the temperature selector setting 6.101.8.2 Electronically controlled appliances At flow rates of 50 % and 100 %, respectively, the temperature selector setting shall be changed within second, in accordance to the specifications in given in Table 115 and Table 116 The flow rates shall be set at the minimum temperature selector setting The response time starts as soon as the temperature selector setting has been changed A criterion for the starting point might be the changing-point of the power If steady state condition has been reached, the measurement is continued for at least minute to determine the temperature mean value The response time is considered as complete once the water outlet temperature has entered the mean value -1K At the maximum temperature selector setting the temperature has to reach mean value -2K The determination of the temperature deviation starts as soon as the water outlet temperature has first reached the mean value of the outlet temperature following the new 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 before-mentioned mean value The values shall be entered into Table 115 and Table 116 16 BS EN 50193-2-1:2016 EN 50193-2-1:2016 (E) Table 115 – Behaviour following the change of the temperature selector setting at a flow rate of 50 % Temperature Outlet Flow rate Temperature Respons At steady state selector temperature, deviation during e time setting set point response time value K Outlet Flow temperatur rate a, actual e, actual value value °C + - seconds °C l/min Minimum T38 Maximum 50 % T38 Minimum - - - - - a For appliances with regulated flow-rate limiting devices the flow rate can change during response time In this case no manually interference is permitted Table 116 – Behaviour following the change of the temperature selector setting at a flow rate of 100 % Temperature Outlet Flow rate Temperature Respons At steady state selector temperature, deviation e time setting during Outlet Flow setpoint temperature rate a, value response time actual K , actual value value °C + − s °C l/min Minimum T38 Maximum 100 % T38 Minimum - - - - - a For appliances with regulated flow-rate limiting devices the flow rate can change during response time In this case no manually interference is permitted 6.101.8.3 Hydraulically controlled appliances Not applicable 6.101.9 Behaviour at voltage limits Purpose of this test is to determine the variation of the outlet temperature when operated at the supply voltage limits +5 % and -10 % The appliance shall be operated at nominal voltage The user-settable temperature selector shall be set to T38 The test shall be performed at a flow rate of 50 % including Table 102 until steady state is reached The mean values of the outlet temperatures shall be noted in Table 117 Then the appliance shall be operated at nominal voltage +5 % The user-settable temperature selector and the flow rate shall be unchanged The test shall be performed until steady state The mean value of the outlet temperature at nominal voltage +5 % shall be noted in Table 117 17 BS EN 50193-2-1:2016 EN 50193-2-1:2016 (E) Then the appliance shall be operated at nominal voltage -10 % The user-settable temperature selector and the flow rate shall be unchanged The test shall be performed until steady state The mean value of the outlet temperature at nominal voltage -10 % shall be noted in Table 117 Table 117 – Behaviour at voltage limits Operating voltage Operating voltage Temperature selector setting Outlet temperature V following steady state nominal voltage T38 nominal voltage +5 % T38 °C nominal voltage -10 % T38 7.101 Additional tests for electronic instantaneous water heaters 7.101.1 General These tests shall only be performed on appliances which according to the manufacturer are intended to be operated at an inlet temperature of T38 + 2K NOTE Appliances intended for an increased water inlet temperature are also suitable for the use in installations with preheated water, e.g heat pump or solar installations 7.101.2 Behaviour of the outlet temperature at decreasing water inlet temperature The purpose of this test is to determine the behaviour of the appliance at slowly decreasing water inlet temperatures, e.g from a solar storage tank The user-settable temperature selector shall be set to T38 The test shall be performed at a flow rate of 50 % Starting at inlet water temperature of 2K + T38 outlet temperature value, the water inlet temperature shall be reduced in 10 steps of K each At each setting of the water inlet temperature wait until the outlet temperatures has reached steady state conditions, then measure for at least another minute From the temperature profile occurring after steady state has been reached the respective mean value of the outlet temperature shall be determined Both the maximum positive and the maximum negative deviations of the water outlet temperature from the before-mentioned mean values shall be given in Table 118 Table 118 – Behaviour of the outlet temperature at decreasing water inlet temperature Temperature selector setting Inlet temperature, Outlet temperature Temperature deviation T38 set point following steady state K °C +/- T38 + 2K °C T38 + 1K T38 T38 - 1K T38 - 2K T38 - 3K T38 - 4K T38 - 5K T38 - 6K T38 - 7K T38 - 8K 18