DIN EN 1434-6-2016 Heat meters - Part 6 Installation commissioning operational monitoring and maintenance German version EN 1434-6 2015《量热计 第6部分 安装、交付使用、操作监控和维护 德文版本EN 1434-6-2015》.pdf

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1、February 2016 English price group 13No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 17.200.10!%LS$“2414801www.din.d

2、eDIN EN 1434-6Heat meters Part 6: Installation, commissioning, operational monitoring and maintenance;English version EN 1434-6:2015,English translation of DIN EN 1434-6:2016-02Wrmezhler Teil 6: Einbau, Inbetriebnahme, berwachung und Wartung;Englische Fassung EN 1434-6:2015,Englische bersetzung von

3、DIN EN 1434-6:2016-02Compteurs dnergie thermique Partie 6: Installation, mise en service, surveillance de fonctionnement et maintenance;Version anglaise EN 1434-6:2015,Traduction anglaise de DIN EN 1434-6:2016-02SupersedesDIN EN 1434-6:2007-05www.beuth.deDocument comprises 26 pagesDTranslation by DI

4、N-Sprachendienst.In case of doubt, the German-language original shall be considered authoritative.02.16DIN EN 1434-6:2016-02 2 A comma is used as the decimal marker. National foreword This document (EN 1434-6:2015) has been prepared by Technical Committee CEN/TC 176 “Heat meters” (Secretariat: SIS,

5、Sweden). The responsible German body involved in its preparation was DIN-Normenausschuss Heiz- und Raumlufttechnik (DIN Standards Committee Heating and Ventilation Technology), Working Committee NA 041-03-05 AA Wrmezhler (SpA zu CEN/TC 176). Amendments This standard differs from DIN EN 1434-6:2007-0

6、5 as follows: a) some special cases for combined cooling and heating meters have been added; b) additional functionalities for smart metering applications have been included; c) installation requirements for heat meters, which are located next to cables like data communication cables and mains suppl

7、y cables, have been specified; d) the installation requirements for 4-wire connections have been changed; e) cooling meters have been included. Previous editions DIN 4713-4: 1980-12 DIN EN 1434-6: 1997-04, 2003-02, 2007-05 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 1434-6 November 2015 ICS

8、 17.200.10 Supersedes EN 1434-6:2007English Version Heat meters - Part 6: Installation, commissioning, operational monitoring and maintenance Compteurs dnergie thermique - Partie 6: Installation, mise en service, surveillance de fonctionnement et maintenance Wrmezhler - Teil 6: Einbau, Inbetriebnahm

9、e, berwachung und Wartung This European Standard was approved by CEN on 5 September 2015. 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 li

10、sts and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation unde

11、r the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Y

12、ugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey andUnited Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROP

13、EN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2015 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 1434-6:2015 EEN 1434-6:2015 (E) 2 Contents Page European forew

14、ord . 3 1 Scope 5 2 Normative references 5 3 Terms and definitions . 5 4 Requirements . 6 4.1 Design requirements . 6 4.2 Installation requirements 7 4.3 Heat meter commissioning 8 4.3.1 General 8 4.3.2 Certification check 8 4.3.3 Installation check 8 4.3.4 Heat meter security 8 Annex A (informative

15、) Heat meter installation . 9 Annex B (informative) Heat meter operational monitoring and maintenance 19 Annex C (informative) Suggested gauge for checking the dimensions of installed temperature sensor pockets 22 Annex ZA (informative) Relationship between this European Standard and the Essential R

16、equirements of EU Directive 2004/22/EC, MID . 23 Bibliography . 24 DINEN 1434-6:2016-02EN 1434-6:2015 (E) 3 European foreword This document (EN 1434-6:2015) has been prepared by Technical Committee CEN/TC 176 “Heat meters”, the secretariat of which is held by SIS. This European Standard shall be giv

17、en the status of a national standard, either by publication of an identical text or by endorsement, at the latest by May 2016, and conflicting national standards shall be withdrawn at the latest by May 2016. Attention is drawn to the possibility that some of the elements of this document may be the

18、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 1434-6:2007. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supp

19、orts essential requirements of EU Directive. For relationship with EU Directive, see informative Annex ZA, which is an integral part of this document. EN 1434, Heat meters consists of the following parts: Part 1: General requirements Part 2: Constructional requirements Part 3: Data exchange and inte

20、rfaces1) Part 4: Pattern approval tests Part 5: Initial verification tests Part 6: Installation, commissioning, operational monitoring and maintenance In comparison to EN 1434-6:2007, the following changes have been made: special cases for combined cooling and heating meters are added; additional fu

21、nctionalities for smart metering applications are added; installation requirements added for heat meters which are located next to cables like data communication cables and mains supply cables; installation requirement changed for 4-wire connections; cooling meters are added. According to the CEN/CE

22、NELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, 1) EN 1434-3 is maintained by CEN/TC 294. DINEN 1434-6:2016-02EN 1434-6:2015 (E) 4 Croatia, Cyprus, Czech Republic, Denmark, Estonia,

23、 Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. DINEN 1434-6:2016-02EN 1434

24、-6:2015 (E) 5 1 Scope This European Standard specifies commissioning, operational monitoring and maintenance and applies to heat meters. Heat meters are instruments intended for measuring the energy which in a heat-exchange circuit is absorbed (cooling) or given up (heating) by a liquid called the h

25、eat-conveying liquid. The heat meter indicates the quantity of heat in legal units. Electrical safety requirements are not covered by this European Standard. Pressure safety requirements are not covered by this European Standard. Surface mounted temperature sensors are not covered by this European S

26、tandard. This standard covers meters for closed systems only, where the differential pressure over the thermal load is limited. 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 refere

27、nces, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 1434-1:2015, Heat meters Part 1: General requirements 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 14

28、34-1:2015 and the following apply. 3.1 heating system heating installation of the dwelling or premises, including the exchange circuit, the heat meter, the associated fittings and the electrical equipment Note 1 to entry: The heating system typically commences and finishes at the two connections to

29、the heat mains. 3.2 heat mains heat suppliers distribution pipes to which the consumers installation is connected 3.3 inlet and outlet limbs pipes connecting the heating system to the heat mains 3.4 primary circuit circuit hydraulically connected to the heat mains 3.5 secondary circuit circuit hydra

30、ulically separated from the primary circuit 3.6 competent authority persons or organizations charged with the responsibility for the heat meter and/or its installation DINEN 1434-6:2016-02EN 1434-6:2015 (E) 6 4 Requirements 4.1 Design requirements 4.1.1 When designing the heating system, the heat me

31、ter manufacturer meter specification and installation instructions shall be followed. For DN 40 and smaller, it is possible to use short direct sensors. To achieve good temperature sensitivity, direct sensors should be installed without temperature pockets. Temperature pockets should only be used wh

32、en required for safety reasons. 4.1.2 To avoid unnecessary systematic error the temperature sensors shall be placed directly before and after the thermal load. If the differential pressure between the sensors is too high this systematic error might be too large. For typical systematic negative error

33、 as a function of differential pressure and temperature difference, see Table 1. Table 1 Typical systematic negative error as a function of differential pressure and temperature difference Diff in bar Temperature difference in K 3 5 10 20 30 40 50 60 0,5 0,2 0,2 0,1 0,1 0,1 0 0 0 1 0,5 0,4 0,3 0,2 0

34、,1 0,1 0,1 0,1 2 0,9 0,7 0,5 0,3 0,2 0,2 0,1 0,1 3 1,4 1,1 0,8 0,5 0,3 0,2 0,2 0,2 4 1,8 1,5 1,0 0,6 0,4 0,3 0,3 0,2 5 2,3 1,9 1,3 0,8 0,5 0,4 0,3 0,3 6 2,7 2,2 1,5 0,9 0,6 0,5 0,4 0,3 7 3,2 2,6 1,9 1,1 0,7 0,6 0,5 0,4 8 3,6 3,0 2,0 1,2 0,9 0,7 0,5 0,4 9 4,1 3,3 2,3 1,4 1,0 0,7 0,6 0,5 10 4,5 4,0 2,

35、5 1,5 1,1 0,8 0,7 0,5 The values are shown as fraction of the maximum permissible error for the calculator. The values below the marked line are higher than 1/3rdof the maximum permissible error for the heat calculator. If the resulting error is higher than 1/3rdof the maximum permissible error, it

36、is recommended to change the installation to have smaller differential pressure. NOTE In cases where flows from two different loads with different temperatures (e.g. for space heating and domestic warm water) are merged together just before the temperature sensor, the optimum position for the sensor

37、 is after the flow sensor. 4.1.3 For bifunctional meters for change-over systems between heating and cooling additional requirements are necessary to ensure the correct switching over function between the heating and cooling register. These requirements are: the lowest operating temperature in the i

38、nlet pipe at heating conditions shall be at least 3 C higher than any specified optional switching over temperature hc, DINEN 1434-6:2016-02EN 1434-6:2015 (E)7 the highest operating temperature in the inlet pipe at cooling conditions shall be at least 3 C lower than any specified optional switching

39、over temperature hc, the minimum temperature difference in heating and cooling application shall be more than 3 K. NOTE The above mentioned temperature range of at least 3 C covers the maximum accepted uncertainty in absolute temperature and the cable resistance. A temperature sensor with smaller to

40、lerances than 2 C for measuring absolute temperature is recommended. 4.2 Installation requirements The heat meter shall be installed in accordance with the manufacturers instructions. Before installation, the circuit into which the flow sensor is to be installed shall be thoroughly flushed to remove

41、 debris. The strainer, where fitted, shall be cleaned. The heat meter shall be protected from the risk of damage by shock and vibration induced by the surround-ings at the place of installation. The heat meter shall not be subjected to undue stresses caused by pipes and fittings. The pipe lines of t

42、he heating system up and downstream of the heat meter shall be adequately anchored. Heat meters designed to operate from an AC mains supply shall be wired in accordance with wiring regulations applicable. The AC mains power supply shall be secured against accidental interruption. However, circuit pr

43、otection shall be incorporated according to the state of the art, to safely disconnect the device when electrical problems occur. Measurement signal leads shall not be laid directly alongside other leads such as mains supply cables, low voltage supply cables and data communication cables and shall b

44、e independently supported. The separation between those groups shall not be less than 50 mm. Unless the calculator under installation was type tested according to the latest version of EN 1434-4, it is recommended to install cables and calculators with a distance of at least 60 cm to strong electrom

45、agnetic fields, e.g. frequency controlled pumps and similar high energy mains cables. Mains and external signal cables longer than 10 m shall in areas where lightning is frequent be protected with an external lightning surge protection at the cable entrance to the building. Each signal lead between

46、temperature sensors and calculator shall be one continuous length without joints except 4-wire connection solutions which are approved. Signal circuits between parts of a heat meter shall be so installed as to deter unauthorized interference and disconnection. Precautions shall be taken to prevent d

47、amage to the heat meter by unfavourable hydraulic conditions (cavitation, surging, water hammer). When the installation of the heat and cooling meters is complete, it shall be inspected and approved by representatives of the competent authority in accordance with established procedures and the inspe

48、ction shall be documented. Installation shall be done according to national legislation on legal metrology. DINEN 1434-6:2016-02EN 1434-6:2015 (E) 8 4.3 Heat meter commissioning 4.3.1 General The responsibility for the carrying out of each of the inspection phases is not necessarily restricted to on

49、e person or one authority depending on the national legislation on legal metrology, but however arranged, the following points shall be addressed and responsibilities defined. 4.3.2 Certification check Before commissioning commences it shall be ascertained firstly, that the correct heat meter has been installed by comparing the heat meter manufacturers type and size designation against the system specification. Secondly, it shall be checked that the heat meter, if a complete instrument, bears the correct pattern approval mark