DIN EN 14897-2007 Water conditioning equipment inside buildings - Devices using mercury low-pressure ultraviolet radiators - nRequirements for performance safety and testing(includ.pdf

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1、September 2007DEUTSCHE NORM English price group 13No part of this standard 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 13.060.20; 91.140.60

2、!$Hyw“1378684www.din.deDDIN EN 14897Water conditioning equipment inside buildings Devices using mercury low-pressure ultraviolet radiators Requirements for performance, safety and testing (includes AmendmentA1:2007)English version of DIN EN 14897:2007-09Anlagen zur Behandlung von Trinkwasser innerha

3、lb von Gebuden Gerte mit Quecksilberdampf-Niederdruckstrahlern Anforderungen an Ausfhrung, Sicherheit und Prfung (enthlt nderung A1:2007)Englische Fassung DIN EN 14897:2007-09SupersedesDIN EN 14897:2006-09www.beuth.deDocument comprises 32 pages 11.07DIN EN 14897:2007-09 2 National foreword This stan

4、dard has been prepared by Technical Committee CEN/TC 164 “Water supply” (Secretariat: AFNOR, France). The responsible German body involved in its preparation was the Normenausschuss Wasserwesen (Water Practice Standards Committee), Technical Committee NA 119-04-07-01 UA Wasserbehandlung. Amendments

5、This standard differs from DIN EN 14897:2006-09 as follows: a) In subclause 5.3 Table 2 has been corrected. b) Annex F has been added. Previous editions DIN EN 14897: 2006-09 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 14897:2006+A1 June 2007 ICS 13.060.20; 91.140.60 Supersedes EN 14897:200

6、6English Version Water conditioning equipment inside buildings - Devices using mercury low-pressure ultraviolet radiators - Requirements for performance, safety and testing Appareils de traitement deau lintrieur des btiments - Dispositifs utilisant des radiateurs mercure et basse pression de rayonne

7、ment UV - Exigences de performance, de scurit et essais Anlagen zur Behandlung von Trinkwasser innerhalb von Gebuden - Gerte mit Quecksilberdampf-Niederdruckstrahlern - Anforderungen an Ausfhrung, Sicherheit und Prfung This European Standard was approved by CEN on 10 May 2006 and includes Amendment

8、1 approved by CEN on 10 May 2007. 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 references concerning such natio

9、nal standards may be obtained on application to the CEN 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 member into its own language and n

10、otified to the CEN Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg,

11、 Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2007 CEN All rights o

12、f exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 14897:2006+A1:2007: EEN 14897:2006+A1:2007 (E) 2 Contents Page Foreword3 1 Scope 4 2 Normative references 4 3 Definitions 4 4 Requirements.7 4.1 General7 4.2 Radiation chamber.7 4.3 Low-pressure merc

13、ury UV lamps.7 4.4 Electrical.7 4.4.1 General7 4.4.2 UV disinfection devices 7 4.4.3 UV bactericidal treatment devices .8 4.5 Performance.8 4.6 Labelling .8 4.7 Manual.9 5 Testing 9 5.1 General9 5.2 Test rig and installation . 10 5.3 Biodosimetric measurements . 10 5.4 Performance test procedure 11

14、5.4.1 UV disinfection devices . 11 5.4.2 Processing of the data . 13 5.4.3 UV bactericidal treatment devices 15 5.4.4 Processing of the data . 15 Annex A (normative) Requirements for the device sensor 17 A.1 Calibration . 17 A.2 Selectivity 17 A.3 Measuring range linearity 17 A.4 Measuring range and

15、 resolution . 17 A.5 Temperature drift 18 A.6 Stability over time. 18 Annex B (normative) Biodosimeter calibration. 19 Annex C (informative) Monitoring window 22 Annex D (normative) Manufacturers information for the type test 23 Annex E (normative) Manufacturers information for the UV device user .

16、25 Annex F (normative) !Installation, operation and maintenance 26 Bibliography. 30 EN 14897:2006+A1:2007 (E) 3 Foreword This document (EN 14897:2006+A1:2007) has been prepared by Technical Committee CEN/TC 164 “Water supply”, the secretariat of which is held by AFNOR. This document shall be given t

17、he status of a national standard, either by publication of an identical text or by endorsement, at the latest by December 2007 and conflicting national standards shall be withdrawn at the latest by December 2007. This document includes Amendment 1, approved by CEN on 2007-05-10. This document supers

18、edes EN 14897:2006. The start and finish of text introduced or altered by amendment is indicated in the text by tags ! “. With respect to potential adverse effects on the quality of water intended for human consumption/caused by the product covered by this standard, the following is pointed out to t

19、he user of the standard. 1) This standard provides no information as to whether the product may be used without restriction in any of the Member States. 2) It should be noted that, while awaiting the adoption of verifiable European criteria, existing national regulations concerning the use and/or ch

20、aracteristics of this product remain in force. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germ

21、any, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN 14897:2006+A1:2007 (E) 4 1 Scope This document specifies definitions, principles of construction,

22、 requirements and methods for testing the performance of UV devices for drinking water installations inside buildings which are permanently connected to the mains supply at the point of entry into a building or within the water distribution system inside the building. UV devices in the sense of this

23、 standard are UV bactericidal treatment devices or UV disinfection devices. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the refere

24、nced document (including any amendments) applies. EN 1717, Protection against pollution of potable water in water installations and general requirements of devices to prevent pollution by backflow 3 Definitions For the purposes of this document, the following terms and definitions apply. 3.1 absorpt

25、ion decrease of the incident irradiance of a light beam including transformation into other forms suffered by radiant energy passing through a material substance (e. g. heat) 3.2 irradiance measure of the UV light flux divided by the area that intercepts the radiation, in W/m2 NOTE The irradiance me

26、asured in UV disinfection devices by the UV device sensor is mainly influenced by the lamp output, the transmittance of the water, and scaling/fouling of the protective quartz sleeves and the position of the lamps in the radiation chamber. 3.3 disinfection action of killing or inactivating all types

27、 of pathogenic bacteria to a specified degree of at least 99,999 % and all types of pathogenic viruses to a degree of at least 99,99 % using a UV disinfection device 3.4 bactericidal treatment action of inactivating or killing bacteria present in water to an unspecified degree using a UV bactericida

28、l treatment device 3.5 fluence dose product of irradiance in W/m2and exposure time in s, in J/m2NOTE Fluence is the correct term from a strictly scientific point of view. 3.6 germicidal fluence fluence weighted with the germicidal UV sensitivity, in J/m2EN 14897:2006+A1:2007 (E) 5 3.7 reduction equi

29、valent fluence (REF) average germicidal fluence measured by the biodosimeter in accordance with 5.3 in the radiation chamber, in J/m23.8 radiation chamber part of the device that comprises the radiation zone and the connecting pipes 3.9 radiation zone part of the radiation chamber whose volume is us

30、ed for the calculation of the fluence 3.10 exposure time time interval during which a specific volume of water within the radiation zone is exposed to the radiation, in s 3.11 microbiological dosimeter; biodosimeter test organism used to determine the equivalent fluence, whose UV inactivation behavi

31、our has been determined in a standard collimated beam apparatus (see Annex B), e. g. Bacillus subtilis spores 3.12 minimum irradiance value determined in the type test that ensures the required reduction equivalent fluence at a defined water flow rate and at a defined UV transmittance value, in W/m2

32、3.13 flow rate (Q) volume of water per unit time flowing through the UV device, in l/min or m3/h 3.14 maximum flow rate (Qmax) highest flow at which, at a defined UV transmittance of the water and a defined irradiance, the required reduction equivalent fluence can be guaranteed, in l/min or m3/h 3.1

33、5 permissible operation range those limit values for the operation parameters (irradiance at the sensor or UV transmittance of the water) and flow rate where adequate bactericidal treatment or disinfection is assured 3.16 sensor system for the measurement of the irradiance in UV disinfection devices

34、 3.16.1 reference sensor sensor used to countercheck the signal of the device sensor where national regulations apply. NOTE The reference sensor should comply to national standards where existent, e.g. !2, 3“. 3.16.2 selectivity percentage of the sensor signal that is produced by radiation with a wa

35、velength of 254 nm 3.16.3 device sensor calibrated sensor monitoring device used for continuous measurement of the irradiance EN 14897:2006+A1:2007 (E) 6 3.17 attenuation absorption and diffraction of radiation passing through an optical medium in a specific direction 3.18 lamp service life service

36、life of a UV radiator after which the irradiance that is necessary to guarantee the minimum fluence can no longer be reached under the mode of operation given by the manufacturer, and the lamp has to be replaced, in h 3.19 UV lamp radiator which produces UV light 3.20 UV device general expression fo

37、r products using UV light to irradiate water flow through, with the purpose of inactivating microrganisms being present in the water 3.21 UV disinfection device device designed to disinfect water 3.22 UV bactericidal treatment device device designed for bactericidal water treatment 3.23 turbidity re

38、duction of optical transmittance of a liquid caused by the presence of undissolved matter 3.24 UV transmittance (% T100) spectral transmission rate at a wavelength of 254 nm at an optical path length in the medium of 100 mm, in % NOTE In general, the UV transmittance includes the influence of attenu

39、ation and absorption of the through passing medium. The UV transmittance is measured in the unfiltered sample in quartz cuvettes of at least 40 mm at a wavelength of 254 nm in a spectrophotometer and is given in %. 3.25 UV radiation (UV) electromagnetic radiation according to Table 1 Table 1 UV radi

40、ation Type Wavelength nm UV-C 100 280 UV-B 280 315 UV-A 315 400 NOTE For bactericidal and disinfection purposes, part of the UV-C range is used. EN 14897:2006+A1:2007 (E) 7 4 Requirements 4.1 General The treatment of water with the UV device shall yield a reduction equivalent fluence of at least 400

41、 J/m2(40 mJ/cm2), at a wavelength of 254 nm in the defined operational range. 4.2 Radiation chamber The radiation chamber is made of corrosion resistant and UV resistant materials. Materials and substances used shall be suitable for contact with drinking water. NOTE Product intended for use in water

42、 supply systems should comply, when existing, with national regulations and testing arrangements that ensure fitness for contact with drinking water. The Member states, relevant regulators and the EC Commission agreed on the principles of a future unique European Acceptance Scheme (EAS), which would

43、 provide a common testing and approval arrangement at European level. If and when the EAS is adopted, European Product Standards will be amended by the addition of an Annex Z/EAS under Mandate M/136, which will contain formal references to the testing, certification and product marking requirements

44、of the EAS. The mechanical design and the construction shall comply with the relevant requirements for the pressure present. Direct or indirect leaking of radiation from the radiation chamber to the environment with a wavelength below 400 nm shall be avoided. Radiation chambers shall be constructed

45、in a way that they are easily serviceable. For UV disinfection devices, the radiation chamber shall be provided with a sensor for a representative irradiation measurement. The location of the sensor shall be designed so that the irradiation measurement is not disturbed by gas bubbles or sediment dep

46、osits. 4.3 Low-pressure mercury UV lamps In order not to produce ozone, only lamps with a radiation range above 240 nm shall be used. !At the mercury resonance line of 254 nm shall be 85 % of the total radiation intensity in the UV-C range.“ Lamp(s) shall be marked with a designation of type. Only t

47、hose lamps used for the type test shall be used in the UV device. The UV lamp(s) shall be approved for the device by the manufacturer or be equivalent to the approved type used at the type test. 4.4 Electrical 4.4.1 General For the electrotechnical design of UV devices, the relevant EC Directives an

48、d CE marking requirements shall be accomodated. Compliance with these EC Directives is a requirement of this standard. !deleted text“ 4.4.2 UV disinfection devices 4.4.2.1 Controller The UV disinfection device shall be equipped with a controller, which provides the following functions: when switchin

49、g on the device, the signal for the waterflow shall be delayed until the minimum irradiance is reached; operation and failure of the electrical function of each lamp shall be indicated; operation beyond the permissible limits of operation shall be indicated and a signal shall be provided which allows the waterflow to be stopped; EN 14897:2006+A1:2007 (E) 8 general malfunction signal shall be provided; when shutting down the device or in case of a breakdown of the electric power supply, a signal shall be provided which allows the sto