1、BRITISH STANDARDBS EN 14743:2005 +A1:2007Water conditioning equipment inside buildings Softeners Requirements for performance, safety and testingThe European Standard EN 14743:2005, incorporating amendment A1:2007, has the status of a British StandardICS 91.140.60g49g50g3g38g50g51g60g44g49g42g3g58g4
2、4g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 14743:2005+A1:2007This British Standard was published under the authority of the Standards Policy and Strategy Committee on 21 Dec
3、ember 2005 BSI 2007ISBN 978 0 580 59875 3National forewordThis British Standard is the UK implementation of EN 14743:2005, incorporating amendment A1:2007.The UK participation in its preparation was entrusted by Technical Committee B/504, Water supply, to Subcommittee B/504/13, Water treatment devic
4、es.A list of organizations represented on this subcommittee 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 correct application. Compliance with a British Standard cannot confer immunit
5、y from legal obligations.Amendments issued since publicationAmd. No. Date Comments17242 31 July 2007 Incorporating CEN amendment A1:2007.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 14743:2005+A1 June 2007 ICS 71.100.80; 91.140.60 Supersedes EN 14743:2005English Version Water conditioning eq
6、uipment 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 - Anforderungen an Ausfhr
7、ung, 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 Standard the status of a
8、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, German). A version
9、 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, Czech Republic, Denma
10、rk, 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 EUROPEN DE NORMALISAT
11、ION 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 Foreword4 1 Scope 5 2 Nor
12、mative 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 4.3.2 Resistance to c
13、yclic 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 vent10 4.3.11 End
14、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 Exchange capacity.11 4
15、.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 conditions 12 7.1.1 Am
16、biant 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 Continuity of water su
17、pply .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 water after a regenera
18、tion17 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 document shall be given
19、 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. This document supe
20、rsedes 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) This European Standa
21、rd 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 characteristics of
22、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, Germany, Greece, Hung
23、ary, 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 construction and mo
24、de 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 applicable. NOTE Produc
25、ts 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 European Acceptance
26、 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, certification and p
27、roduct 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 document (including an
28、y 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 prevent pollution by ba
29、ckflow 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 ISO 3822-1, Acoustics
30、 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: Mounting and opera
31、ting 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 10304-1:1992) EN ISO 118
32、85, 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 and definitions For
33、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 course of which the
34、 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 kilogram of salt, bet
35、ween 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 break-through of h
36、ardness 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 alkaline earths, exp
37、ressed 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 considered to be exhausted
38、 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, and to initiate tha
39、t 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 14743:2005+A1:2007 (E) 7 3.
40、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 rate 3.13 regenerati
41、on 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 process, including water
42、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 and the brine-prod
43、uction 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 exchange resin in the sod
44、ium 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 hydraulic flows (wate
45、r 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) in water, express
46、ed 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, expressed in litre, in
47、dicated 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 during regeneration;
48、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 regeneration, and feature
49、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 leakage, a hydrostatic pres
