Heat pumps with electrically driven compressors - Testing, performance rating and requirements for marking of domestic hot water units

This European Standard specifies methods for testing, rating of performance and calculation of water heating energy efficiency of air/water, brine/water, water/water and direct exchange/water heat pump water heaters and heat pump combination heaters with electrically driven compressors and connected to or including a domestic hot water storage tank for domestic hot water production.
This European Standard comprises only the testing procedure for the domestic hot water production of the heat pump system.
NOTE 1   Testing procedures for simultaneous operation for domestic hot water production and space heating are not treated in this standard. Simultaneous means that domestic hot water production and space heating generation occur at the same time and may interact.
NOTE 2   For heat pump combination heaters the seasonal efficiency of space heating is determined according to EN 14825.
This European Standard only applies to water heaters which are supplied in a package of heat pump and storage tank. In the case of water heaters consisting of several parts with refrigerant connections, this European Standard applies only to those designed and supplied as a complete package.
This European Standard does not specify requirements of the quality of the used water.

Wärmepumpen mit elektrisch angetriebenen Verdichtern - Prüfungen, Leistungsbemessung und Anforderungen an die Kennzeichnung von Geräten zum Erwärmen von Brauchwarmwasser

Diese Europäische Norm legt Verfahren zur Prüfung, Bewertung der Leistung und Berechnung der Energieeffizienz beim Erwärmen des Wassers für Wärmepumpen-Wassererwärmer und Kombi-Wärmepumpen-Heizgeräte mit elektrisch angetriebenen Verdichtern, die mit einem Speicher für Brauchwarmwasser verbunden sind oder einen solchen enthalten, bei Luft/Wasser, Sole/Wasser, Wasser/Wasser und Direktaustausch/Wasser für die sanitäre Warmwasserbereitung fest.
Diese Europäische Norm umfasst nur das Prüfverfahren für die sanitäre Warmwasserbereitung des Wärmepumpensystems.
Anmerkung 1:   Prüfverfahren für die gleichzeitige sanitäre Warmwasserbereitung und Raumheizung werden in dieser Norm nicht behandelt. Gleichzeitig bedeutet, dass die sanitäre Warmwasserbereitung und die Wärmeerzeugung für die Raumheizung zur gleichen Zeit erfolgen und in Wechselwirkung treten dürfen.
Anmerkung 2:   Für Kombi-Wärmepumpen-Heizgeräte wird die saisonale Arbeitszahl der Raumheizung nach EN 14825 bestimmt.
Diese Europäische Norm gilt nur für Wassererwärmer, die als Verbundanlage aus Wärmepumpe und Warmwasserspeicher geliefert werden. Bei Wassererwärmern, die aus mehreren Teilen mit Kältemittelanschlüssen bestehen, gilt diese Europäische Norm nur für die Geräte, die als vollständige Einheit konstruiert und geliefert werden.
Diese Europäische Norm legt keine Anforderungen an die Qualität des gebrauchten Wassers fest.

Pompes à chaleur avec compresseur entraîné par moteur électrique - Essais, détermination des performances et exigences pour le marquage des appareils pour eau chaude sanitaire

La présente Norme européenne spécifie les méthodes d’essai, la détermination des performances et le calcul de l’efficacité énergétique pour la production d’eau chaude des chauffe-eau thermodynamiques air/eau, eau glycolée/eau, eau/eau et détente directe/eau et des dispositifs mixtes par pompe à chaleur équipés de compresseurs entraînés par moteur électrique et raccordés ou intégrés à un réservoir de stockage d’eau chaude sanitaire pour la production d’eau chaude sanitaire.
La présente Norme européenne ne comprend que les procédures d’essai pour la production d’eau chaude sanitaire par le système de pompe à chaleur.
NOTE 1   Les procédures d’essai applicables simultanément à la production d’eau chaude sanitaire et au chauffage des locaux ne sont pas traitées dans la présente norme. Le terme « simultanément » signifie que la production d’eau chaude sanitaire et la génération du chauffage des locaux s’effectuent en même temps et peuvent interagir.
NOTE 2    Pour les dispositifs de chauffage mixte par pompe à chaleur, l’efficacité saisonnière pour le chauffage des locaux est déterminée conformément à l’EN 14825.
La présente Norme européenne s’applique uniquement aux chauffe-eau qui sont fournis sous forme d’ensemble comprenant une pompe à chaleur et un réservoir de stockage. Dans le cas de chauffe-eau composés d’éléments séparés avec des branchements de fluide frigorigène, la présente Norme européenne ne s’applique qu’aux appareils conçus et fournis comme un ensemble.
La présente Norme européenne ne spécifie pas d’exigences sur la qualité de l’eau utilisée.

Toplotne črpalke z električnimi kompresorji - Preskušanje, vrednotenje lastnosti in zahteve za označevanje naprav za pripravo tople sanitarne vode

Ta evropski standard določa metode za preskušanje, vrednotenje zmogljivosti in izračun energetske učinkovitosti ogrevanja kombinacij zrak/voda, slanica/voda, voda/voda in neposredna izmenjava/voda grelnikov vode s toplotno črpalko ter kombiniranih grelnikov s toplotno črpalko z električno gnanimi kompresorji, ki so povezani z ali vključujejo rezervoar za toplo sanitarno vodo za proizvodnjo tople sanitarne vode.
OPOMBA 1:Ta standard ne obravnava preskusnih postopkov za sočasno delovanje proizvodnje tople sanitarne vode in ogrevanja prostorov. Sočasno pomeni, da proizvodnja tople sanitarne vode in ogrevanje prostorov potekata ob istem času, pri čemer lahko pride do medsebojnega vpliva.
Ta evropski standard zajema le preskusni postopek za proizvodnjo tople sanitarne vode s sistemom toplotne črpalke.
OPOMBA 2: Pri kombiniranih grelnikih s toplotno črpalko se sezonska učinkovitost ogrevanja prostorov določi v skladu s standardom EN 14825.
Ta evropski standard se uporablja samo za grelnike vode, ki so dobavljeni v kompletu s toplotno črpalko in rezervoarjem za vodo. Pri grelnikih vode, ki so sestavljeni iz več delov, s priključki za hladilno sredstvo se ta evropski standard uporablja samo za tiste, ki so zasnovani in dobavljeni kot celoten komplet.
Ta evropski standard ne določa zahtev za kakovost uporabljene vode.

General Information

Status
Published
Publication Date
10-Jan-2017
Current Stage
6060 - Definitive text made available (DAV) - Publishing
Due Date
11-Jan-2017
Completion Date
11-Jan-2017

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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Wärmepumpen mit elektrisch angetriebenen Verdichtern - Prüfungen, Leistungsbemessung und Anforderungen an die Kennzeichnung von Geräten zum Erwärmen von BrauchwarmwasserPompes à chaleur avec compresseur entraîné par moteur électrique - Essais, détermination des performances et exigences pour le marquage des appareils pour eau chaude sanitaireHeat pumps with electrically driven compressors - Testing, performance rating and requirements for marking of domestic hot water units91.140.65Oprema za ogrevanje vodeWater heating equipment27.080Heat pumps23.140VWURMLCompressors and pneumatic machinesICS:Ta slovenski standard je istoveten z:EN 16147:2017SIST EN 16147:2017en,fr,de01-marec-2017SIST EN 16147:2017SLOVENSKI

STANDARDSIST EN 16147:2011/AC:2012SIST EN 16147:20111DGRPHãþD
SIST EN 16147:2017
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 16147
January
t r s y ICS
t yä r z r Supersedes EN
s x s v yã t r s sEnglish Version

Heat pumps with electrically driven compressors æ Testingá performance rating and requirements for marking of domestic hot water units Pompes à chaleur avec compresseur entraîné par moteur électrique æ Essaisá détermination des performances et exigences pour le marquage des appareils pour eau chaude sanitaire

Wärmepumpen mit elektrisch angetriebenen Verdichtern æ Prüfungená Leistungsbemessung und Anforderungen an die Kennzeichnung von Geräten zum Erwärmen von Brauchwarmwasser This European Standard was approved by CEN on

z October
t r s xä

egulations which stipulate the conditions for giving this European Standard the status of a national standard without any alterationä Upætoædate lists and bibliographical references concerning such national standards may be obtained on application to the CENæCENELEC Management Centre or to any CEN memberä

translation under the responsibility of a CEN member into its own language and notified to the CENæCENELEC Management Centre has the same status as the official versionsä

CEN members are the national standards bodies of Austriaá Belgiumá Bulgariaá Croatiaá Cyprusá Czech Republicá Denmarká Estoniaá Finlandá Former Yugoslav Republic of Macedoniaá Franceá Germanyá Greeceá Hungaryá Icelandá Irelandá Italyá Latviaá Lithuaniaá Luxembourgá Maltaá Netherlandsá Norwayá Polandá Portugalá Romaniaá Serbiaá Slovakiaá Sloveniaá Spainá Swedená Switzerlandá Turkey and United Kingdomä

EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG

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

t r s y CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Membersä Refä Noä EN

s x s v yã t r s y ESIST EN 16147:2017

EN 16147:2017 (E) 2 Contents Page European foreword ....................................................................................................................................................... 5 1 Scope .................................................................................................................................................................... 6 2 Normative references .................................................................................................................................... 6 3 Terms and definitions ................................................................................................................................... 7 4 Symbols and abbreviations ...................................................................................................................... 10 5 Installation requirements ......................................................................................................................... 12 5.1 Test apparatus and uncertainties of measurement ........................................................................ 12 5.2 Test room for the outdoor heat exchanger of air source heat pumps ...................................... 13 5.3 Installation and connection of the heat pump ................................................................................... 14 5.4 Installation of heat pumps consisting of several parts ................................................................... 14 6 Settings and test conditions ..................................................................................................................... 14 6.1 General ............................................................................................................................................................. 14 6.2 Settings for non-ducted air source units ............................................................................................. 14 6.3 Setting the external static pressure difference for ducted air source units ........................... 15 6.4 Setting the difference of temperature for heat pumps using a liquid as heat source ......... 15 6.5 Test conditions .............................................................................................................................................. 15 6.5.1 General test conditions .............................................................................................................................. 15 6.5.2 Additional test conditions ......................................................................................................................... 15 7 Performance tests ........................................................................................................................................ 18 7.1 General ............................................................................................................................................................. 18 7.2 Basic principles ............................................................................................................................................. 18 7.3 Off-peak products ........................................................................................................................................ 19 7.4 Power input corrections ............................................................................................................................ 19 7.4.1 Power input of fans for heat pumps with duct connection ........................................................... 19 7.4.2 Power input of liquid pumps ................................................................................................................... 20 7.5 Stabilization [stage A] ................................................................................................................................. 21 7.6 Filling and storage [stage B] ..................................................................................................................... 21 7.7 Filling and heating up period [stage C]................................................................................................. 21 7.8 Standby power input [stage D] ................................................................................................................ 22 7.9 Water draw-offs and COP calculation [stage E] ................................................................................. 22 7.9.1 Determination of the useful energy....................................................................................................... 22 7.9.2 Determination of the electrical energy consumption (WEL-LP) ..................................................... 24 7.9.3 Coefficient of performance (COPDHW) .................................................................................................... 25 7.10 Reference hot water temperature and volume of mixed water at 40 °C [stage F] ................ 25 7.11 Calculation of the smart control factor SCF ........................................................................................ 26 7.11.1 General ............................................................................................................................................................. 26 7.11.2 Smart Control Test procedure ................................................................................................................. 26 7.12 Determination of the ambient correction term Qcor ........................................................................ 30 7.13 Water heating energy efficiency wh ...................................................................................................... 31 7.13.1 Determination of Qelec ................................................................................................................................. 31 7.13.2 Calculation of wh for heat pump water heaters and heat pump combination water heaters ............................................................................................................................................................. 31 7.13.3 Calculation of the Annual Consumption of electric energy ........................................................... 31 7.14 Other performance ...................................................................................................................................... 31 SIST EN 16147:2017

EN 16147:2017 (E) 3 7.14.1 Rated heat output ......................................................................................................................................... 31 7.14.2 Seasonal coefficient of performance (SCOPDHW) ................................................................................ 32 8 Other tests ....................................................................................................................................................... 32 8.1 Temperature operating range ................................................................................................................. 32 8.2 Outside the operating range ..................................................................................................................... 33 8.3 Safety devices checking test ...................................................................................................................... 33 8.3.1 General ............................................................................................................................................................. 33 8.3.2 Shutting off the heat transfer medium flows ...................................................................................... 33 8.3.3 Complete power supply failure ............................................................................................................... 34 8.4 Condensate draining.................................................................................................................................... 34 9 Test results and test report ....................................................................................................................... 34 9.1 Data to be recorded...................................................................................................................................... 34 9.2 Test report ...................................................................................................................................................... 36 9.2.1 General information .................................................................................................................................... 36 9.2.2 Main results .................................................................................................................................................... 37 10 Marking ............................................................................................................................................................ 38 11 Documentation .............................................................................................................................................. 38 11.1 Technical data sheet .................................................................................................................................... 38 11.1.1 General description ..................................................................................................................................... 38 11.1.2 Performance characteristics .................................................................................................................... 38 11.2 Instructions ..................................................................................................................................................... 39 11.2.1 General ............................................................................................................................................................. 39 11.2.2 Physical description .................................................................................................................................... 39 11.2.3 Additional heating devices, if integrated in unit ............................................................................... 39 11.2.4 Control and safety ......................................................................................................................................... 39 11.2.5 Instructions for installation ...................................................................................................................... 40 11.2.6 Instructions for maintenance ................................................................................................................... 40 Annex A (normative)

Load profiles ..................................................................................................................... 41 Annex ZA (informative)

Relationship between this European Standard and the ecodesign requirements of Commission Regulation (EU) No 814/2013 aimed to be covered ............. 46 Annex ZB (informative)

Relationship between this European Standard and and the ecodesign requirements of Commission Regulation (EU) No 812/2013 aimed to be covered ............................................................................................................................................................. 48 Annex ZC (informative)

Relationship between this European Standard and the ecodesign requirements of Commission Regulation (EU) No 813/2013 aimed to be covered ............. 49 Annex ZD (informative)

Relationship between this European Standard and the ecodesign requirements of Commission Regulation (EU) No 811/2013 aimed to be covered ............. 50 Bibliography ................................................................................................................................................................. 52 Figures Figure 1 — Stages and order of the tests ............................................................................................................ 18 Figure 2 — Illustration of a test for one possible load profile .................................................................... 23 Figure 3 — Test procedure for “SMART CYCLE” ............................................................................................... 27

Tables Table 1 — Uncertainties of measurement for indicated values ................................................................. 13 SIST EN 16147:2017

EN 16147:2017 (E) 4 Table 2 — Variations allowed for the test conditions when the heat pump is running ................... 15 Table 3 — Test conditions applicable to all systems ..................................................................................... 16 Table 4 — Test conditions for particular types of systems ......................................................................... 17 Table 5 — Maximum ventilation exhaust air available dependent on declared load profile ......... 17 Table 6 — Example of a series of load profiles ................................................................................................ 28 Table 7 — k-values ..................................................................................................................................................... 30 Table 8 — Operating conditions ........................................................................................................................... 32 Table 9 — Determination of wet bulb temperature related to dry bulb temperature ..................... 33 Table 10 — Data to be recorded............................................................................................................................ 34 Table 11 — Additional data to be recorded for smart cycle test ............................................................... 36 Table 12 — Presentation of main results .......................................................................................................... 37 Table A.1 — Load profiles 3 XS to S ...................................................................................................................... 41 Table A.2 — Load profiles M to XL ........................................................................................................................ 42 Table A.3 — Load profiles XXL to 4 XL ................................................................................................................ 44 Table ZA.1 — Correspondance between this European Standard and Commission Regulation (EU) No 814/2013Correspondence between this European Standard and Commission Regulation (EU) No 814/2013 of 2 August 2013 implementing Directive 2009/125/EC of the European Parliament and of the Council with regard to ecodesign requirements for water heaters and hot water storage tanks and Commission’s standardization request M/534 (Ecodesign Water Heaters) ....................... 46 Table ZB.1 — Correspondence between this European Standard and Commission Regulation (EU) No 812/2013 of 18 February 2013 supplementing Directive 2010/30/EU of the European Parliament and of the Council with regard to the energy labelling of water heaters, hot water storage tanks and packages of water heater and solar device and Commission’s standardization request Full reference to the request ‘M/534 (Ecodesign Water Heaters)........................................................................ 48 Table ZC.1 — Correspondence between this European Standard and Commission Regulation (EU) No 813/2013 of 2 August 2013 implementing Directive 2009/125/EC of the European Parliament and of the Council with regard to ecodesign requirements for space heaters and combination heaters and Commission’s standardization request M/535 (Ecodesign Space Heaters) ........................ 49 Table ZD.1 — Correspondence between this European Standard and Commission Regulation (EU) No 811/2013 of 18 February 2013 supplementing Directive 2010/30/EU of the European Parliament and of the Council with regard to the energy labelling of space heaters, combination heaters, packages of space heater, temperature control and solar device and packages of combination heater, temperature control and solar device and Commission’s standardization request Full reference to the request M/535 (Ecodesign Space Heaters) ............................................ 50

SIST EN 16147:2017

EN 16147:2017 (E) 5 European foreword This document (EN 16147:2017) has been prepared by Technical Committee CEN/TC 113 “Heat pumps and air conditioning units”, the secretariat of which is held by AENOR. 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 July 2017, and conflicting national standards shall be withdrawn at the latest by July 2017. 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 16147:2011. 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 Directive(s). For relationship with EU Directive(s), see informative Annexes ZA, ZB, ZC and ZD, which are an integral part of this document. Note that the following provides details of significant technical changes between this document and the previous edition: a) re-structuring of the standard into the Clause 5 "Installation requirements", Clause 6 "Settings and test conditions", Clause 7 "Performance tests", Clause 8 „Other tests“ and Clause 9 „Test results and test report“; b) update of Table 1 "Uncertainties of measurement for indicated values" in terms of units; c) update of the performance test regarding the stages (i.e. A. to F.) and the order of the tests (see 7.2); d) introduction of 7.11 "Calculation of the smart control factor SCF" and 7.12 „Determination of the ambient correction term corQ“ on the basis of the European Standard EN 50440:2015; e) introduction of 7.13.3 "Calculation of the Annual Consumption of electric energy"; f) re-allocation and revision of the former "tapping cycles“ into the new annex "Load profiles" (see Tables A.1 to A.3); g) introduction of 7.14 "Other performances" regarding rated heat output and seasonal coefficient of performance; h) addition of the Annex ZA and Annex ZB for the relationship between this European Standard and the requirements of Commission Regulation (EU) No 814/2013 and (EU) No 812/2013; i) addition of the Annex ZC and Annex ZD for the relationship between this European Standard and the requirements of Commission Regulation (EU) No 813/2013 and (EU) No 811/2013. 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. SIST EN 16147:2017

EN 16147:2017 (E) 6 1 Scope This European Standard specifies methods for testing, rating of performance and calculation of water heating energy efficiency of air/water, brine/water, water/water and direct exchange/water heat pump water heaters and heat pump combination heaters with electrically driven compressors and connected to or including a domestic hot water storage tank for domestic hot water production. This European Standard comprises only the testing procedure for the domestic hot water production of the heat pump system. NOTE 1 Testing procedures for simultaneous operation for domestic hot water production and space heating are not treated in this standard. Simultaneous means that domestic hot water production and space heating generation occur at the same time and may interact. NOTE 2 For heat pump combination heaters the seasonal efficiency of space heating is determined according to EN 14825. This European Standard only applies to water heaters which are supplied in a package of heat pump and storage tank. In the case of water heaters consisting of several parts with refrigerant connections, this European Standard applies only to those designed and supplied as a complete package. This European Standard does not specify requirements of the quality of the used water. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 14511-1, Air conditioners, liquid chilling packages and heat pumps with electrically driven compressors for space heating and cooling - Part 1: Terms, definitions and classification EN 14511-2, Air conditioners, liquid chilling packages and heat pumps with electrically driven compressors for space heating and cooling - Part 2: Test conditions EN 14511-3, Air conditioners, liquid chilling packages and heat pumps with electrically driven compressors for space heating and cooling - Part 3: Test methods EN 60204-1, Safety of machinery - Electrical equipment of machines - Part 1: General requirements (IEC 60204-1) EN 60335-2-40, Household and similar electrical appliances - Safety - Part 2-40: Particular requirements for electrical heat pumps, air-conditioners and dehumidifiers (IEC 60335-2-40)

EN 61000-3-11, Electromagnetic compatibility (EMC) - Part 3-11: Limits - Limitation of voltage changes, voltage fluctuations and flicker in public low-voltage supply systems - Equipment with rated current <= 75 A and subject to conditional connection (IEC 61000-3-11) SIST EN 16147:2017

EN 16147:2017 (E) 7 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 14511-1 and the following apply. 3.1 heat pump water heater water heater that uses ambient heat from air source, water source or ground source, and/or waste heat for heat generation 3.2 heat pump combination heater heat pump space heater that is designed to also provide heat to deliver hot drinking or sanitary water at given temperature levels, quantities and flow rates during given intervals, and is connected to an external supply of drinking or sanitary water 3.3 domestic hot water water heated for household or similar purposes 3.4 storage volume mV measured volume of the tank 3.5 non heated space air heat source for a heat pump which absorbs heat by an air heat exchanger in direct contact with the air inside a non-heated space within a building 3.6 indoor air heat source for a heat pump which absorbs heat by an air heat exchanger in direct contact with the air inside a heated space within a building 3.7 coefficient of performance for domestic hot water COPDHW coefficient of performance which is determined by the use of a reference load profile and which includes the heat losses of the storage tank 3.8 reference hot water temperature θWH' temperature determined as the mean temperature value of the average temperatures during one single draw-off which ends when the hot water temperature is below 40 °C 3.9 mixed water at 40 °C 40V quantity of water at 40 °C, which has the same heat content (enthalpy) as the hot water which is delivered above 40 °C at the output of the water heater SIST EN 16147:2017

EN 16147:2017 (E) 8 3.10 off-peak product water heater that is energised for a maximum period of 8 consecutive hours between 22:00 and 07:00 of the 24 hour tapping pattern 3.11 water heating energy efficiency wh ratio between the useful energy (in domestic hot water) provided by a water heater and the energy required for its generation 3.12 load profile given sequence of water draw-offs 3.13 water draw-off given combination of useful water flow rate, useful water temperature, useful energy content and peak temperature 3.14 useful water flow rate f minimum flow rate for which hot water is contributing to the reference energy 3.15 useful water temperature mT water temperature at which hot water starts contributing to the reference energy 3.16 useful energy content tapQ energy content of hot water provided at a temperature equal to, or above, the useful water temperature, and at water flow rates equal to, or above, the useful water flow rate 3.17 peak temperature pT minimum water temperature to be achieved during water draw-off calculated as the mean value over the water draw-off 3.18 reference energy of the load profile refQ sum of the useful energy content of water draw-offs in a particular load profile SIST EN 16147:2017

EN 16147:2017 (E) 9 3.19 daily electrical energy consumption elecQ consumption of electrical energy for water heating over 24 consecutive hours under a specific load profile 3.20 smart control device that automatically adapts the water heating process to individual usage conditions with the aim of reducing energy consumption 3.21 smart control factor SCF water heating energy efficiency gain due to smart control 3.22 primary standby heat loss stbyP primary power input of a heat pump water heater in operating modes without heat demand 3.23 standby power input esP total power input of the unit during the standby test, including the power input of the unit to overcome heat losses of the tank and the power input of any auxiliary device 3.24 ambient correction term corQ energy correction term which takes into account the fact that the place where the water heater is installed is not an isothermal place 3.25 conversion coefficient CC coefficient reflecting the power generation efficiency Note 1 to entry: According to Directive 2012/27/EU the CC value is equal to 2,5. SIST EN 16147:2017

EN 16147:2017 (E) 10 4 Symbols and abbreviations Symbol Description Units AEC Annual electrical energy consumption kWh/a CC conversion coefficient, equal to 2,5 — SCF smart control factor — DHWCOP coefficient of performance for domestic hot water — pc specific heat capacity of water kJ/(kgK) ESP external static pressure Pa f useful water flow rate l/min maxf maximum flow rate of considered load profile l/min maxf(t) maximum flow rate of hot water during draw-off l/min f(t) useful water flow rate l/min i index for the draw-off — k coefficient for the determination of ambient correction term, which value is given in Table 7 — actm difference of the two weights (filled/empty) of the storage water heater kg esP standby power input kW ratedP rated heat output kW SP measured average power input for off-peak products kW stbyP primary standby heat loss kW corQ ambient correction term kWh elecQ daily electrical energy consumption kWh EL-LPQ calculated heat energy produ

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