1、BSI Standards PublicationBS EN 834:2013Heat cost allocators forthe determination of theconsumption of room heatingradiators Appliances withelectrical energy supplyIncorporating corrigendum April 2015BS EN 834:2013 BRITISH STANDARDNational forewordThe UK participation in its preparation was entrusted
2、 to Technical Committee CPI/30, Measurement of fluid flow in closed conduits.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 correc
3、t application. The British Standards Institution 2015.Published by BSI Standards Limited 2015ISBN 978 0 580 90351 9ICS 91.140.10Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strateg
4、y Committee on 31 August 2013.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e d 30 June 2 0 1 5 I m p l e m e n t a t i o n o f C E N c o r r i g e n d u m A p r i l 2 0 1 5: F i g u r e 1 u p d a t e d .This British Standard is the UK implementation of EN 834:2013, incorpor
5、ating corrigendum April 2015. It supersedes BS EN 834:1995, which is withdrawn.BS EN 834:2013EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 834 August 2013 ICS 91.140.10 Supersedes EN 834:1994English Version Heat cost allocators for the determination of the consumption of room heating radiator
6、s - Appliances with electrical energy supplyRpartiteurs de frais de chauffage pour dterminer la consommation des corps de chauffe - Appareils dots dune alimentation en nergie lectrique Heizkostenverteiler fr die Verbrauchserfassung von Raumheizflchen - Gerte mit elektrischer Energieversorgung This E
7、uropean Standard was approved by CEN on 28 December 2012. 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 referenc
8、es 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 me
9、mber 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, F
10、rance, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES
11、 KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2013 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 834:2013: EIncorporating corrigendum April 2015BS EN 834:2013EN 834:2013 (E) Contents Page Foreword 4 Int
12、roduction .5 1 Scope 5 2 Normative references 6 3 Terms and definitions .6 4 Functional principle and measurement methods 11 5 General specifications . 12 5.1 Base condition 12 5.2 c-value 13 5.3 Rating factors 13 5.4 Calendar function . 14 6 Requirements for heat cost allocators . 15 6.1 Requiremen
13、ts concerning temperature stress 15 6.2 Storage temperature . 15 6.3 Start of counting . 15 6.4 Idle counting rate 15 6.5 Temperature sensors . 15 6.6 Calculator/central processing unit 16 6.7 Auxiliary power supply 16 6.8 Overflow of the display 16 6.9 Display resolution . 16 6.10 Functional check.
14、 16 6.11 Limits of relative display deviation . 17 6.12 Ageing 17 6.13 Electrical, electrostatic and magnetic influences . 17 6.14 Thermal impact on heat cost allocators operating in accordance with the single-sensor measurement method 17 6.15 Thermal impact on heat cost allocators operating in acco
15、rdance with the two-sensor measurement method 17 6.16 Thermal impact on other devices or components 18 6.17 Impact on transmission systems 18 6.18 Sealing . 18 6.19 Calendar function . 18 6.20 Taking into account operating conditions . 18 7 Requirements for use and installation . 19 7.1 Temperature
16、limits 19 7.2 Attachment of the sensors 19 7.3 Attachment position of the sensors . 20 7.4 Connecting cable installation 20 7.5 Uniformity of heat cost allocators . 20 8 Rating requirements . 21 8.1 Rating factor KQ21 8.2 Rating factor KC21 8.3 Rating factor KT21 8.4 Resulting rating factor K 21 8.5
17、 c-value 21 2 BS EN 834:2013EN 834:2013 (E) 9 Requirements for maintenance and reading 22 9.1 Visual reading 22 9.2 Close-range reading 22 9.3 Remote reading . 22 10 Testing 22 10.1 General . 22 10.2 Test documents . 23 10.3 Test report 23 10.4 Test protocols 23 11 Test procedures . 23 11.1 Construc
18、tion test . 23 11.2 Sealing test 23 11.3 Temperature durability test 23 11.4 Test for compliance with the limits of the relative display deviation 24 11.5 Ageing resistance test 24 11.6 Test of the start of counting at normal operation and also, for heat cost allocators with room temperature sensors
19、, at operation with thermal impact . 24 11.7 Test of the idle counting rate . 25 11.8 Test of the counting rate in the case of thermal impact 25 11.9 Test for external influences 26 11.10 Test of c-values, procedure 26 11.11 Test of c-values, scope of testing 26 11.12 Test of rating factor KQ. 26 11
20、.13 Test of rating factor KC. 27 12 Marking . 27 Annex A (informative) Information and recommendations 28 A.1 General . 28 A.2 Heating systems 28 A.3 Recommended field of application 28 A.4 Heat emission not controllable by the consumer 29 A.5 Additional corrections 29 A.6 Documentation of the relat
21、ionship between the counting rate and the thermal output 30 Bibliography 32 3 BS EN 834:2013EN 834:2013 (E) Foreword This document (EN 834:2013) has been prepared by Technical Committee CEN/TC 171 “Heat cost allocation”, the secretariat of which is held by DIN. This European Standard shall be given
22、the status of a national standard, either by publication of an identical text or by endorsement, at the latest by February 2014, and conflicting national standards shall be withdrawn at the latest by February 2014. Attention is drawn to the possibility that some of the elements of this document may
23、be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 834:1994 Amendments Compared to EN 834:1994, the following changes were made: a) Definitions, requirements and test procedures have been refine
24、d and expanded, b) Introduction of new values for the lower temperature limit, c) Uniform definition for the mounting location of heat cost allocators on the radiator. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to impl
25、ement 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
26、, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. 4 BS EN 834:2013EN 834:2013 (E) Introduction This document deals with heat cost allocators with electrical power supply used for establishing the consumption value of room heating surfaces. It specifies the minimum requ
27、irements for the construction, materials, production, installation, function and evaluation of the displayed readings established by these measuring devices. This document describes test procedures to establish compliance with the stated requirements and specifies instructions for their nature and s
28、cope. 1 Scope NOTE See Clause 3 for a definition of the terms used below. This European standard applies to heat cost allocators which are used to capture the proportionate thermal output of radiators in consumer units. If an account unit comprises consumer units of different types (e.g. technically
29、 different types of heating systems or differences due to the consumer behaviour, e.g. industrial plants as opposed to private apartments), it could be necessary to divide this account unit into groups of users. Heat cost allocators enable the determination of the heat consumption only of each radia
30、tor in a consumer unit as a share of the total heat consumption of the account unit or user group (see Clause 4); it is therefore necessary to determine this total heat consumption either by measuring the consumed fuel quantity or the amount of heat delivered (the latter by means of a heat meter, fo
31、r example). For the appropriate use of the heat cost allocators in accordance with this standard, the heating system needs to: correspond to the state of the art at the time of installation of the heat cost allocators; be operated in accordance with the state of the art (see A.2). This standard spec
32、ifies that heat cost allocators shall not be used for heating systems where the temperature of the heating system falls below or exceeds the temperature limits of the heat cost allocators, where the rating factor for the thermal output, KQ, cannot be clearly specified or where the heating surface is
33、 inaccessible. This applies usually to the following heating systems: floor heating; radiant ceiling heating; flap-controlled radiators; radiators with ventilators; fan-assisted air heaters; heating systems with steam-operated radiators. 5 BS EN 834:2013EN 834:2013 (E) 2 Normative references Not app
34、licable. 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 heat cost allocator instrument for registration of the proportionate thermal output of radiators in consumer units 3.2 heat cost allocation system overall system, as verified by an insp
35、ection authority, consisting of a heat cost allocator, installation equipment, installation instructions, rating system, existing rating factors, maintenance and reading instructions 3.3 measurement method physical principle of measurement in combination with fundamental properties of the appliance
36、type Note 1 to the term: For heat cost allocators in accordance with this standard, the fundamental property of the appliance type characterizing the method is the number of measuring sensors for registering the relevant temperatures. The physical principle of measurement which is applied preferably
37、 is the temperature dependency of electrical components. 3.4 consumer unit dwellings, office, business or industrial premises in which the heat is supplied by a common central heating system or by a common district heating connection 3.5 account unit total of all consumer units 3.6 user group group
38、of consumer units within one account unit, each with a uniform heating system and comparable type of use 3.7 mean heating medium temperature tm mean value of the flow and return temperatures of the heating medium Note 1 to the term: In this standard, tmis determined by adding up the logarithmic heat
39、ing medium excess temperature, tln, (formula (2), see 5.2) and the reference air temperature, tL. 3.8 heating medium excess temperature t temperature difference between the mean heating medium temperature and the reference air temperature Note 1 to the term: In this standard, the heating medium exce
40、ss temperature (abbreviated as “excess temperature“) is determined as the logarithmic excess temperature tlnin accordance with formula (2) (see 5.2). 6 BS EN 834:2013EN 834:2013 (E) 3.9 design flow temperature tV,Avalue of the flow temperature of the radiators required in order to reach the design i
41、ndoor temperature in the heated rooms under steady state conditions at a heat load corresponding to a geographically determined design reference outside temperature 3.10 design return temperature tR,Avalue of the return temperature of the radiators required in order to reach the design indoor temper
42、ature in the heated rooms under steady state conditions at a heat load corresponding to a geographically determined design reference outside temperature 3.11 mean design heating medium temperature tm,Amean value of the design flow temperature and the design return temperature Note 1 to the term: In
43、this standard, tm,Ais determined by adding up the logarithmic mean value of the design excess temperature and the basic reference air temperature of 20 C in accordance with formula (2) (see 5.2). 3.12 base condition radiator operating condition which is freely selectable within predefined limits and
44、 which is used for specifying the rating factors and for determining the c-values 3.13 basic reference air temperature tL,Bvalue of the air temperature at base condition Note 1 to the term: For tL,Bthe specified target value is 20 C, see 5.1. 3.14 reference air temperature tL actual value of the air
45、 temperature while requirements are specified and measurements are carried out 3.15 heating medium base flow medium flow through the radiator at base condition 3.16 temperature sensors sensors consisting of a sensor element and a sensor casing, which generate a temperature-dependent signal Note 1 to
46、 the term: The sensor casing serves both to transfer heat and to protect the sensor element from mechanical influences. 3.17 measuring range of temperature sensors temperature range within which temperature sensors can be used Note 1 to the term: For pairs of temperature sensors which are used for t
47、he determination of temperature differences, in addition to the measuring range, there is also a temperature difference range. 7 BS EN 834:2013EN 834:2013 (E) 3.18 upper temperature limit tmaxmaximum mean design heating medium temperature tm,Aof the heating system heating surfaces equipped with heat
48、 cost allocators at which the heat cost allocator can be used Note 1 to the term: tmaxis a property of the heat cost allocator which is determined by the temperature resistance of the components used. 3.19 lower temperature limit tminminimum mean design heating medium temperature tm,Aof the heating
49、system at which the heat cost allocator can be used Note 1 to the term: tminis a property of the heat cost allocator, which is determined by the measurement method. This definition applies to double-pipe systems directly. For single-pipe systems, the mean design heating medium temperature tm,Aof the heating system is replaced by the mean design heating medium temperature tm,Aof the last radiator in the string or, as a substitute, the design return temperature tR,Aof the string. 3.20 start temperature tZmean heating medium temperature of the radiator,
