1、September 2007DEUTSCHE NORM English price group 12No 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、!$H“1378829www.din.deDDIN EN 14812Water conditioning equipment inside buildings Chemical dosing systems Pre-set dosing systems Requirements for performance, safety andtesting (includes Amendment A1:2007)English version of DIN EN 14812:2007-09Anlagen zur Behandlung von Trinkwasser innerhalb von Gebud
3、en Dosiersysteme Nicht einstellbare Dosiersysteme Anforderungen an Ausfhrung, Sicherheit und Prfung(enthlt nderung A1:2007)Englische Fassung DIN EN 14812:2007-09SupersedesDIN EN 14812:2006-02www.beuth.deDocument comprises 22 pages 11.07DIN EN 14812:2007-09 2 National foreword This standard has been
4、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 This standard
5、differs from DIN EN 14812:2006-02 as follows: a) The title has been modified. b) Annex B has been included. Previous editions DIN 19635: 1986-06, 1992-11 DIN EN 14812: 2006-02 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 14812:2005+A1 June 2007 ICS 13.060.20; 91.140.60 Supersedes EN 14812:20
6、05English Version Water conditioning equipment inside buildings - Chemical dosing systems - Pre-set dosing systems - Requirements for performance, safety and testing Appareils de traitement deau lintrieur des btiments - Systmes de dosage de ractifs chimiques - Systmes de dosage non ajustables - Exig
7、ences de performance, de scurit et essais Anlagen zur Behandlung von Trinkwasser innerhalb von Gebuden - Dosiersysteme - Nicht einstellbare Dosiersysteme - Anforderungen an Ausfhrung, Sicherheit und Prfung This European Standard was approved by CEN on 26 August 2005 and includes Amendment 1 approved
8、 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 national standa
9、rds 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 notified to
10、 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, Malta, Ne
11、therlands, 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 of exploita
12、tion in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 14812:2005+A1:2007: EEN 14812:2005+A1:2007 (E) 2 Contents Page Foreword4 1 Scope 5 2 Normative references 5 3 Terms and definitions .6 4 Design requirements .6 4.1 Materials of construction 6 4.2 Connections .
13、7 4.3 Venting7 4.4 Radio interference and electrical safety7 4.5 Dosing agent containers.7 4.6 Accessibility.7 4.7 Nominal size.7 5 Performance requirements.8 5.1 Dosing and dosing agents8 5.1.1 Dosing agents 8 5.1.2 Dosing.8 5.2 Working ranges8 5.3 Protection against backflow of proprietary chemica
14、l9 5.4 Working temperature range9 5.5 Pressure conditions 9 5.5.1 Nominal pressure and working pressure range.9 5.5.2 Effects of pressure variations 9 5.5.3 Pressure drop.9 5.5.4 Water hammer9 6 Testing 9 6.1 General9 6.2 Dosing and dosing agents10 6.2.1 Test rig 10 6.2.2 Analysis 11 6.2.3 Quality o
15、f test water 11 6.2.4 Sampling.11 6.2.5 Evaluation of results .11 6.2.6 Dosing agents 11 6.2.7 Dosing.11 6.3 Working ranges12 6.4 Protection against backflow of dosing agent.12 6.4.1 Procedure .12 6.4.2 Evaluation of results .12 6.5 Pressure conditions 12 6.5.1 Nominal pressure and working pressure
16、range.12 6.5.2 Static pressure .13 6.5.3 Dynamic pressure13 6.5.4 Working pressure range .13 6.5.5 Pressure drop.13 7 Labelling .13 7.1 Nameplate on dosing apparatus 13 7.2 Information to be given on dosing agent container.14 8 Manufacturers product information14 EN 14812:2005+A1:2007 (E) 3 Annex A
17、(informative) Examples of connections 15 Annex B (normative) !Installation, operation and maintenance 16 Bibliography20 EN 14812:2005+A1:2007 (E) 4 Foreword This document (EN 14812:2005+A1:2007) has been prepared by Technical Committee CEN/TC 164 “Water supply”, the secretariat of which is held by A
18、FNOR. This document shall be given the 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
19、 on 2007-05-10. This document supersedes EN 14812:2005. The start and finish of text introduced or altered by amendment is indicated in the text by tags ! “. In respect of potential adverse effects on the quality of water intended for human consumption, caused by the product covered by this European
20、 Standard: 1) This European Standard provides no information as to whether the product may be used without restriction in any of the Member States in EU or EFTA. 2) It should be noted that, while awaiting the adoption of verifiable European criteria, existing national regulations concerning the use
21、and/or the characteristics 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,
22、 France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN 14812:2005+A1:2007 (E) 5 1 Scope This European Standard specifies definitions, princ
23、iples of construction (but not dimensions) and design, requirements on performance and operation as well as methods for testing the performance of chemical pre-set dosing systems for conditioning water intended for human consumption inside buildings (see 8) which are permanently connected to the mai
24、ns supply. 2 Normative references The following referenced documents are indispensable for the application of this European Standard. For dated references, only the edition cited applies: For undated references, the latest edition of the referenced document (including any amendments) applies. EN 806
25、-2, Specification for installations inside buildings conveying water for human consumption - Part 2: Design EN 1267, Valves Test of flow resistance using water as test fluid EN 55011, Industrial, scientific and medical (ISM) radio-frequency equipment - Radio disturbance characteristics - Limits and
26、methods of measurement (CISPR 11:1997, modified EN 60204-1, Safety of machinery Electrical equipment of machines Part 1: General requirements (IEC 60204-1:1997) EN 60335-11, Household and similar electrical appliances Safety Part 1: General requirements (IEC 60335-1:2001, modified) EN 60335-2-41, Ho
27、usehold and similar electrical appliances - Safety - Part 2-41: Particular requirements for pumps (IEC 60335-2-41:2002) EN 60730-2-8:2002, Automatic electrical controls for household and similar use Part 2-8: Particular requirements for electrically operated water valves, including mechanical requir
28、ements (IEC 60730-2- 8:2000, modified) EN ISO 10304-1, Water quality Determination of dissolved fluoride, chloride, nitrite, orthophosphate, bromide, nitrate and sulphate ions, using liquid chromatography of ions Part 1: Method for water with low contamination (ISO 10304-1:1992) EN ISO 10304-2, Wate
29、r quality Determination of dissolved anions by liquid chromatography of ions Part 2: Determination of bromide, chloride, nitrate, nitrite, orthophosphate and sulfate in waste water (ISO 10304-2:1995) EN ISO 10304-3, Water quality Determination of dissolved anions by liquid chromatography of ions Par
30、t 3: Determination of chromate, iodide, sulphite, thiocyanate and thiosulfate (ISO 10304-3:1997) EN ISO 10304-4, Water quality Determination of dissolved anions by liquid chromatography of ions Part 4: Determination of chlorate, chloride and chlorite in water with low contamination (ISO 10304-4:1997
31、) EN ISO 11885, Water quality Determination of 33 elements by inductively coupled plasma atomic emission spectroscopy (ISO 11885:1996) EN ISO 12100-1, Safety of machinery Basic concepts, general principles for design Part 1: Basic terminology, methodology (ISO 12100-1:2003) 1Observe transition perio
32、d for EN 60335-1(1994) ending 2008-07-01. EN 14812:2005+A1:2007 (E) 6 EN ISO 12100-2, Safety of machinery Basic concepts, general principles for design Part 2: Technical principles (ISO 12100-2:2003) 3 Terms and definitions For the purposes of this European Standard, the following terms and definiti
33、ons apply. 3.1 conditioning of water intended for human consumption processes that modify the quality of water intended for human consumption within the Drinking Water Directive or national drinking water regulations with regard to specific individual constituents as defined in EN 806-2 3.2 pre-set
34、dosing system device used for the controlled addition of dosing agents in one or more fixed quantities 3.3 working range range of treated water flow rates between which the dosing system provides the required accuracy of concentration of the dosing agent within limits of concentration and pressure d
35、rop prescribed by the manufacturer. It covers the range between the upper and lower working limits 3.4 dosing volume per recharge water volume that can be treated with one recharge of dosing agent 3.5 proprietary chemical specific composition of one or more dosing agents in a particular physical for
36、m that is put on the market by the manufacturer under his trade name and supplied together with the dosing apparatus 3.6 dosing agents active chemical substances for conditioning water intended for human consumption 3.7 manufacturer company (manufacturer or supplier) under whose name the dosing syst
37、em and the proprietary chemical(s) are put on the market 4 Design requirements 4.1 Materials of construction Until EAS comes into force, the current national regulations remain applicable. NOTE Products intended for use in water supply systems should comply, when existing, with national regulations
38、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 provide a common testing and approval arrangement at European level. If
39、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 of the EAS. EN 14812:2005+A1:2007 (E) 7 4.2 Connections Examples of connec
40、tions are shown in Annex A. 4.3 Venting The dosing apparatus shall be designed so that accumulation of air or other gases during operation is avoided or does not impair the dosing accuracy. Compliance with this requirement shall be checked on the basis of the detailed technical design documents supp
41、lied with the apparatus. 4.4 Radio interference and electrical safety It is the responsibility of the manufacturer that the dosing system conforms to EN ISO 12100-1, EN ISO 12100-2, EN 60204-1, EN 60335-1 and EN 60335-2-41, following the provisions of Directive 89/336/EEC and Directive 73/23/EEC (se
42、e !9, 10“). 4.5 Dosing agent containers Materials selected for the manufacture of dosing agent containers shall protect the contents against harmful effects of light. The design of the connection between the dosing agent container and the dosing apparatus shall exclude any accidental contamination o
43、f the contents during either normal operation or change of the container. NOTE The size of the dosing agent container or the recharge volume, if a solid type of dosing agent is used should be calculated so that a replacement becomes necessary after not more than six months. 4.6 Accessibility All par
44、ts which have to be actuated for replacing of the dosing agent container and for operation and control shall be easily accessible. It shall be possible to protect them against unauthorised actuation, for example by means of special tools, seals or locks. Renewal of the dosing material shall be carri
45、ed out only by replacing by a ready-made container filled with proprietary chemical. Replacement of the dosing agent container shall be possible without having to disconnect the dosing apparatus from the connecting pipework. 4.7 Nominal size The nominal size of system connection shall correspond to
46、the flow rates given in Table 1. The inlet connection size of the dosing device may be one size larger or smaller than the nominal size. For flange connections, the inlet flange shall conform to nominal size. Table 1 Flow rate values at upper limit of working range Nominal size DN 15 20 25 32 40 50
47、65 80 100 Upper limit of working range flow rate QN 0,35 0,63 1,0 1,6 2,53 3,89 6,67 10 15,56 l/s Upper limit of working range flow rate QN 1,27 2,27 3,6 5,8 9,1 14 24 36 56 m3/h NOTE These flow rates correspond to a velocity of approximately 2 m/s. EN 14812:2005+A1:2007 (E) 8 5 Performance requirem
48、ents 5.1 Dosing and dosing agents 5.1.1 Dosing agents The purpose of the dosing agents shall be restricted to one or more of the following water treatment targets: disinfection of the water; inhibition of corrosion phenomena; inhibition of scaling phenomena (by stabilisation of hardness). Dosing sys
49、tems may be designed for dosing with one or more proprietary chemicals. The manufacturer shall define the proprietary chemicals and their water treatment target depending on the composition of the water and the installation components to be protected. Each proprietary chemical shall be tested separately. Proprietary chemicals shall meet the quality requirements of the relevant European Standard for chemicals used for conditioning of water intended for human consumption. 5.1.2 Dosing The cho
