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 71.100.80; 91.140.60
2、!$I$U“1380150www.din.deDDIN EN 14743Water conditioning equipment inside buildings Softeners Requirements for performance, safety and testing (includes AmendmentA1:2007)English version of DIN EN 14743:2007-09Anlagen zur Behandlung von Trinkwasser innerhalb von Gebuden Enthrter Anforderungen an Ausfhr
3、ung, Sicherheit und Prfung (enthlt nderung A1:2007)Englische Fassung DIN EN 14743:2007-09SupersedesDIN EN 14743:2006-01www.beuth.deDocument comprises 25 pages 11.07DIN EN 14743:2007-09 2 National foreword This standard has been prepared by Technical Committee CEN/TC 164 “Water supply” (Secretariat:
4、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 differs from DIN EN 14743:2006-01 as follows: a) The French title has be
5、en corrected. b) Annex A has been included. c) Conversion of the degree of hardness has been stated more precisely. Previous editions DIN EN 14743: 2006-01 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 14743:2005+A1 June 2007 ICS 71.100.80; 91.140.60 Supersedes EN 14743:2005English Version Wa
6、ter conditioning equipment inside buildings - Softeners - Requirements for performance, safety and testing Appareils de traitement deau lintrieur des btiments - Adoucisseurs - Exigences de performance, de scurit et essais Anlagen zur Behandlung von Trinkwasser innerhalb von Gebuden - Enthrter - Anfo
7、rderungen an Ausfhrung, Sicherheit und Prfung This European Standard was approved by CEN on 26 August 2005 and includes Amendment 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 Standa
8、rd the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national 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,
9、 German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified 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, Cz
10、ech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EU
11、ROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2007 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 14743:2005+A1:2007: EEN 14743:2005+A1:2007 (E) 2 Contents Page Forewo
12、rd4 1 Scope 5 2 Normative references 5 3 Terms and definitions .6 4 Requirements.8 4.1 Softener specification .8 4.2 Quality of materials and chemicals8 4.2.1 Cation exchange resin 8 4.2.2 Regenerating salt.8 4.3 Design and manufacturing specifications 9 4.3.1 Resistance to hydrostatic pressure.9 4.
13、3.2 Resistance to cyclic pressure 9 4.3.3 Minimum and maximum operating pressure 9 4.3.4 Resistance to temperature9 4.3.5 Electrical safety9 4.3.6 Salt tank 9 4.3.7 Continuity of supply during regeneration.9 4.3.8 Protection against backflow and infiltration of brine.9 4.3.9 Noise level 9 4.3.10 Air
14、 vent10 4.3.11 End connections10 4.3.12 Drain connections10 4.4 Operating specifications.10 4.4.1 Initiation of regeneration.10 4.4.2 Brining efficiency.10 4.4.3 Regeneration water10 4.4.4 Quality of treated water after regeneration .10 4.4.5 Continuous flow rate .10 4.4.6 Pressure drop.10 4.4.7 Exc
15、hange capacity.11 4.5 Installation specifications.11 4.5.1 Connection to mains water supply and existing pipe network.11 4.5.2 Drain11 4.5.3 Electrical connection.11 5 Labelling .11 5.1 Identification of equipment.11 5.2 Safety labelling.11 6 Technical documentation .12 7 Test methods12 7.1 Test con
16、ditions 12 7.1.1 Ambiant air .12 7.1.2 Water and salt 12 7.1.3 Test rig 13 7.1.4 Analysis 13 7.2 Cation exchange resin 13 7.3 Technical documentation .14 7.4 Manufacturing tests.14 7.4.1 Resistance to hydrostatic pressure.14 EN 14743:2005+A1:2007 (E) 3 7.4.2 Resistance to cyclic pressure14 7.4.3 Con
17、tinuity of water supply .15 7.4.4 Protection against backflow.15 7.4.5 Air displacement15 7.5 Operating characteristics .15 7.5.1 General .15 7.5.2 Nominal flow rate.15 7.5.3 Regenerations16 7.5.4 Exchange capacity 17 7.5.5 Brine efficiency17 7.5.6 Regeneration water .17 7.5.7 Quality of treated wat
18、er after a regeneration17 Annex A (normative) !Installation, operation and maintenance 18 Bibliography23 EN 14743:2005+A1:2007 (E) 4 Foreword This document (EN 14743:2005+A1:2007) has been prepared by Technical Committee CEN/TC 164 “Water supply”, the secretariat of which is held by AFNOR. This docu
19、ment 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 on 2007-05-10.
20、 This document supersedes EN 14743:2005. 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 Standard: 1) T
21、his European Standard provides no information as to whether the product may be used without restriction in any of the Member States of the EU or EFTA. 2) It should be noted that, while awaiting the adoption of verifiable European criteria, existing national regulations concerning the use and/or the
22、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, France, Ge
23、rmany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN 14743:2005+A1:2007 (E) 5 1 Scope This European Standard specifies requirements relating to the
24、construction and mode of operation and relevant methods of testing of automatic, salt-regenerated, cation exchange softeners for drinking water installations inside buildings which are permanently connected to the mains supply. Until EAS comes into force, the current national regulations remain appl
25、icable. NOTE Products intended for use in water 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 principle of a future unique
26、European Acceptance Scheme (EAS) which would provide a common testing and approval arrangement at European level. If and when the EAS is adopted, European Standards on products will be amended by the addition of an Annex Z/EAS under Mandate M/136 which will contain formal references to the testing,
27、certification and product marking requirements of the EAS. 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 doc
28、ument (including any amendments) applies. EN 973, Chemicals used for treatment of water intended for human consumption Sodium chloride for regeneration of ion exchangers EN 1717, Protection against pollution of potable water in drinking water installations and general requirements of devices to prev
29、ent pollution by backflow EN 60335-1, Household and similar electrical appliances Safety Part 1: General requirements (IEC 60335-1:2001, modified) EN ISO 228-1, Pipe threads where pressure tight joints are not made on the threads Part 1: Dimensions, tolerances and designation (ISO 228-1:2000) EIN IS
30、O 3822-1, Acoustics Laboratory tests on noise emission from appliances and equipment used in water supply installations Part 1: Method of measurement (ISO 3822-1:1999) EN ISO 3822-3, Acoustics Laboratory tests on noise emission from appliances and equipment used in water supply installations Part 3:
31、 Mounting and operating conditions for in-line valves and appliances EN ISO 10304-1, Water quality Determination of dissolved fluoride, chloride, nitrite, orthophosphate, bromide, nitrate and sulfate ions, using liquid chromatography of ions Part 1: Method for water with low contamination (ISO 10304
32、-1:1992) EN ISO 11885, Water quality Determination of 33 elements by inductively coupled plasma atomic emission spectroscopy (ISO 11885:1996) ISO 7-1, Pipe threads where pressure tight joints are made on the threads Part 1: Dimensions, tolerances and designation EN 14743:2005+A1:2007 (E) 6 3 Terms a
33、nd definitions For the purposes of this European Standard, the following terms and definitions apply. 3.1 blending device internal or external device used to adjust the hardness of supplied water by mixing hard water with softened water 3.2 brining main phase of the regeneration process, during the
34、course of which the brine flows through the bed of resin for the purpose of exchanging the alkaline earth ions by sodium ions during the regeneration run, and thereby recovering the exchange capacity of the resin bed 3.3 brining efficiency link, expressed in grams of calcium carbonate (CaCO3) per ki
35、logram of salt, between the exchange capacity and the salt consumption 3.4 cation exchange resin synthetic material which has the capability to exchange cations reversibly 3.5 continuous flow rate maximum flow rate at which a duplex appliance can operate continuously (24 h per day) without premature
36、 break-through of hardness 3.6 duplex appliance softening system employing two resin tanks, enabling the production of uninterrupted softened water supply NOTE A transient hard water supply during change-over from tank to tank is permissible. 3.7 exchange capacity of the softening unit quantity of a
37、lkaline earths, expressed in grams of calcium carbonate, fixed by the softener between the end of the last regeneration and the beginning of the exhaustion of the resin NOTE 1 The end of the regeneration is defined as the moment when the softener is available for service. NOTE 2 The resin is conside
38、red to be exhausted when the residual hardness of the softened water increases above a defined value. 3.8 monitoring device time controller, flow integrator, resin exhaustion sensor or a combination of these, used to determine the appropriate moment in the operating cycle for regeneration to begin,
39、and to initiate that regeneration 3.9 nominal flow rate flow rate of water, expressed in cubic metres per hour, at which a pressure drop of maximum 100 kPa is established 3.10 operating cycle two successive and repetitive runs: the softened water run (or service) and the regeneration run EN 14743:20
40、05+A1:2007 (E) 7 3.11 operating range physical conditions (temperature, pressure, flow rate) within which a softening unit can operate and meet its performance guarantees 3.12 pressure drop decrease in pressure between the inlet and outlet of the softener, expressed in kilopascals, at nominal flow r
41、ate 3.13 regeneration process part of softener operating cycle, during which all the operations needed to restore the ion exchange capacity of a resin bed are carried out 3.14 regeneration water quantity of water, expressed in litres (or in cubic meters), necessary for a complete regeneration proces
42、s, including water used for the preparation of the brine 3.15 residual hardness hardness of water sampled at the outlet of a softener during the service run 3.16 salt consumption quantity of salt, expressed in kilograms, used for each regeneration 3.17 salt tank tank containing the regenerating salt
43、 and the brine-production device 3.18 softener complete installation necessary for the ongoing production of softened water 3.19 softening reduction of the hardness of water by exchange of alkaline earths ions (mainly calcium and magnesium) with sodium ions, by passing through a bed of cation exchan
44、ge resin in the sodium form 3.20 softening unit appliance employing the softening principle and which generally comprises the following constituent parts: pressure vessel containing the cationic ion exchange resin and devices for distributing and collecting hydraulic flows, devices for monitoring hy
45、draulic flows (water and brine) through a multi-way valve or a set of pipes and multiple valves, tank (called salt-tank) for storage of the regeneration salt and production of the brine EN 14743:2005+A1:2007 (E) 8 3.21 total hardness concentration of alkaline earth ions (mainly calcium and magnesium
46、) in water, expressed in millimoles per litre NOTE Previously, the total hardness was expressed in French degrees (f), German degrees (dH) or ppm as CaCO3. !(1 mmol/l corresponds to 100 mg/l of CaCO3or to 10 f or to 5,6 dH).“ !deleted text“ 3.22 volume of resin quantity of cation exchange resin, exp
47、ressed in litre, indicated on the rating plate or in the technical documentation 4 Requirements 4.1 Softener specification Softeners shall include all of following features and devices: a) resin tank, control valve, brine tank, monitoring device; b) automatic regeneration; c) continuity of supply du
48、ring regeneration; d) manual override facility; e) protection against backflows. NOTE When necessary to meet national or local provision, the softener may be required to include additional features; for example: blending device, automatic initiated regeneration after a certain period without regener
49、ation, and feature to control microbiological growth. 4.2 Quality of materials and chemicals 4.2.1 Cation exchange resin The cation exchange resin used in the softener shall be certified by the resin manufacturer to be suitable for the intended application. 4.2.2 Regenerating salt The salt used for the regeneration shall be in compliance with EN 973. EN 14743:2005+A1:2007 (E) 9 4.3 Design and manufacturing specifications 4.3.1 Resistance to hydrostatic pressure The softening unit shall resist, without visible damage nor
