SIST EN 14743:2006+A1:2007
(Main)Water conditioning equipment inside buildings - Softeners - Requirements for performance, safety and testing
Water conditioning equipment inside buildings - Softeners - Requirements for performance, safety and testing
This European Standard specifies requirements relating to the 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 applicable.
Anlagen zur Behandlung von Trinkwasser innerhalb von Gebäuden - Enthärter - Anforderungen an Ausführung, Sicherheit und Prüfung
Diese Europäische Norm legt Anforderungen hinsichtlich der Konstruktion und der Betriebsart sowie entsprechende Prüfverfahren an automatische, mit Salz regenerierte und nach dem Prinzip des
Kationaustausches wirkende Enthärter für Trinkwasser-Installationen in Gebäuden, die dauerhaft an die Wasserversorgung angeschlossen sind, fest.
Bis das EAS-System in Kraft tritt, haben die derzeitigen nationalen Bestimmungen weiterhin Bestand.
ANMERKUNG Produkte für die Verwendung in Wasserversorgungssystemen müssensollten, so weit vorhanden, die nationalen Bestimmungen und Prüfanordnungen erfüllen, die ihre Eignung für den Kontakt mit Trinkwasser bestätigen. Die für die Mitgliedstaaten zuständigen Behörden und die EU-Kommission haben sich auf die Prinzipien eines zukünftigen einheitlichen Europäischen Zulassungssystems (EAS) geeinigt, welches eine gemeinsame Prüf- und Zulassungsregelung auf europäischer Basis bietet.
Falls und sobald EAS eingeführt ist, werden die Europäischen Produktnormen um einen Anhang Z/EAS unter dem Mandat M/136 ergänzt, in welchem formale Verweise auf die Anforderungen für die Prüfung, die Zertifizierung und die Produktkennzeichnung im Rahmen des EAS gegeben werden.
Appareils de traitement d'eau a l'intérieur des bâtiments - Adoucisseurs - Exigences de performance, de sécurité et essais
La présente Norme européenne spécifie les exigences relatives à la construction, au mode de fonctionnement et aux méthodes d’essai correspondantes des adoucisseurs automatiques, échangeurs de cations, à sel régénérant, destinés à des installations d’alimentation en eau potable à l’intérieur des bâtiments et raccordés en permanence à l’alimentation principale.
Les réglementations nationales actuelles restent applicables tant que le Système européen d’acceptation (SEA) n’est pas entré en vigueur.
NOTE Il convient que les produits destinés à un usage dans des systèmes d’alimentation en eau soient conformes, le cas échéant, aux réglementations nationales et aux montages d’essai qui assurent l’aptitude au contact avec l’eau potable. Les organismes de réglementation concernés des États membres et la Commission des communautés européennes se sont mis d’accord sur le principe d’un futur SEA unique définissant des montages d’essai et de validation communs au niveau européen.
À partir de l’adoption du SEA, le cas échéant, les Normes européennes relatives aux produits seront amendées par l’ajout de l’Annexe Z/SEA sous le mandat M/136 qui comportera les références formelles des exigences du SEA en matière d’essais, de certification et de marquage du produit.
Oprema, ki se uporablja za pripravo pitne vode v stavbah - Mehčalci - Zahteve za delovanje, varnost in preskušanje
General Information
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Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Anlagen zur Behandlung von Trinkwasser innerhalb von Gebäuden - Enthärter - Anforderungen an Ausführung, Sicherheit und PrüfungAppareils de traitement d'eau a l'intérieur des bâtiments - Adoucisseurs - Exigences de performance, de sécurité et essaisWater conditioning equipment inside buildings - Softeners - Requirements for performance, safety and testing91.140.60Sistemi za oskrbo z vodoWater supply systems71.100.80Chemicals for purification of water13.060.20Pitna vodaDrinking waterICS:Ta slovenski standard je istoveten z:EN 14743:2005+A1:2007SIST EN 14743:2006+A1:2007en01-julij-2007SIST EN 14743:2006+A1:2007SLOVENSKI
STANDARD
SIST EN 14743:2006+A1:2007
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 14743:2005+A1
June 2007 ICS 71.100.80; 91.140.60 SupersedesEN 14743:2005English Version
Water conditioning equipment inside buildings - Softeners - Requirements for performance, safety and testing
Appareils de traitement d'eau à l'intérieur des bâtiments - Adoucisseurs - Exigences de performance, de sécurité et essais
Anlagen zur Behandlung von Trinkwasser innerhalb von Gebäuden - Enthärter - Anforderungen an Ausführung, Sicherheit und Prüfung 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 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 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, 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
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR 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: ESIST EN 14743:2006+A1:2007
EN 14743:2005+A1:2007 (E) 2 Contents Page Foreword.4 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 chemicals.8 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 cyclic pressure.9 4.3.3 Minimum and maximum operating pressure.9 4.3.4 Resistance to temperature.9 4.3.5 Electrical safety.9 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 vent.10 4.3.11 End connections.10 4.3.12 Drain connections.10 4.4 Operating specifications.10 4.4.1 Initiation of regeneration.10 4.4.2 Brining efficiency.10 4.4.3 Regeneration water.10 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 4.5 Installation specifications.11 4.5.1 Connection to mains water supply and existing pipe network.11 4.5.2 Drain.11 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 methods.12 7.1 Test conditions.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 SIST EN 14743:2006+A1:2007
EN 14743:2005+A1:2007 (E) 3 7.4.2 Resistance to cyclic pressure.14 7.4.3 Continuity of water supply.15 7.4.4 Protection against backflow.15 7.4.5 Air displacement.15 7.5 Operating characteristics.15 7.5.1 General.15 7.5.2 Nominal flow rate.15 7.5.3 Regenerations.16 7.5.4 Exchange capacity.17 7.5.5 Brine efficiency.17 7.5.6 Regeneration water.17 7.5.7 Quality of treated water after a regeneration.17 Annex A (normative)
!Installation, operation and maintenance.18 Bibliography.23
SIST EN 14743:2006+A1:2007
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 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 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) This 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 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, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
SIST EN 14743:2006+A1:2007
EN 14743:2005+A1:2007 (E) 5 1 Scope This European Standard specifies requirements relating to the 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 applicable. 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 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, 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 document (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 prevent 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 ISO 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: 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 10304-1:1992) 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 SIST EN 14743:2006+A1:2007
EN 14743:2005+A1:2007 (E) 6 3 Terms and 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 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 kilogram 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 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 alkaline 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 considered 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, 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 SIST EN 14743:2006+A1:2007
EN 14743:2005+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 rate 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 process, 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 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 exchange 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 hydraulic 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 SIST EN 14743:2006+A1:2007
EN 14743:2005+A1:2007 (E) 8 3.21 total hardness concentration of alkaline earth ions (mainly calcium and magnesium) 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 CaCO3 or to 10 °f or to 5,6 °dH)." !deleted text" 3.22 volume of resin quantity of cation exchange resin, expressed 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 during 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 regeneration, 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. SIST EN 14743:2006+A1:2007
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 pressure of 1,5 times the maximum design pressure or 1 000 kPa which ever is the greater for 10 20+ min as defined in 7.4.1. 4.3.2 Resistance to cyclic pressure The softening unit shall resist, without visible damage nor leakage, a cyclic pressure test of not less than
5 000 cycles with the pressure fluctuating at a frequency of 15 21+− cycles per minute between 150 kPa and 1,3 times the maximum design pressure as defined in 7.4.2. 4.3.3 Minimum and maximum operating pressure The softener shall operate and regenerate to the requirements of this European Standard with a minimum water supply pressure of 200 kPa and a maximum pressure not less than 60 % of the maximum design pressure when tested in accordance with 7.1.3 d). 4.3.4 Resistance to temperature The softener shall be designed to operate and regenerate to the requirements of this European Standard with water temperatures between 5 °C and 25 °C and with ambient temperatures between 5 °C and 35 °C. 4.3.5 Electrical safety Softening units shall conform to the requirements for safety of electrical appliances in accordance with
EN 60335-1. 4.3.6 Salt tank The salt tank shall be equipped with a cover to prevent the intrusion of dust and foreign bodies, and an overflow of ample dimensions. The capacity of the salt tank shall be such that it permits a minimum of five regenerations between refills. 4.3.7 Continuity of supply during regeneration The softener design shall permit continuity of water supply during regeneration (see 7.4.3). 4.3.8 Protection against backflow and infiltration of brine a) Softener shall include a device to prevent backflow into the main supply, in accordance with the national implementation of EN 1717. If such a device is not evident, the softener shall be tested in accordance with 7.4.4.1. These shall be no water or brine collected from the vacuum reservoir. b) Infiltration of brine into the softened water supply during normal operation shall also be verified by testing in accordance with 7.4.4.2. In no outlet samples, the chloride concentration shall exceed
1,5 mmol/l over that of the inlet water. 4.3.9 Noise level The softening unit shall conform to noise levels defined and measured in accordance with EN ISO 3822-1 and EN ISO 3822-3 for both the service and regeneration runs. SIST EN 14743:2006+A1:2007
EN 14743:2005+A1:2007 (E) 10 4.3.10 Air vent The design shall ensure that any trapped air shall be released in normal operating conditions (see 7.4.5). 4.3.11 End connections The fittings used to assemble the softener and to connect it to existing pipework shall conform to the requirements of ISO 7-1 and EN ISO 228-1. 4.3.12 Drain connections The regeneration drain shall be independent from the salt tank overflow. 4.4 Operating specifications 4.4.1 Initiation of regeneration Regeneration shall be initiated automatically (see 7.5.3.2 a)). Each softening unit shall also be equipped with a provision for manual initiation of regeneration (see 7.5.3.1). For a timer controlled softener the actual time at which regeneration is initiated shall not vary from that set on the time-clock by more than 30 min (see 7.5.3.2 b)). For a volume controlled softener the volume of water treated between regenerations shall be within 10 % of the programmed water volume (see 7.5.3.2 c)). For a softener which regenerates on the detection of exhaustion of the resin, the exchange capacity of the softener shall not vary by more than 10 % of the rated capacity of the equipment (see 7.5.3.2 d)). 4.4.2 Brining efficiency Each kilogram of salt used during regeneration shall produce a minimum exchange capacity of 4 mol (400 g of CaCO3), measured under conditions defined in 7.5.4 and 7.5.5. 4.4.3 Regeneration water The volume of water necessary for a complete regeneration shall not be more than 0,33 l per gram of CaCO3 fixed between two regenerations measured in accordance with 7.5.6. 4.4.4 Quality of treated water after regeneration When tested in accordance with 7.5.7, the chloride content after a regeneration shall not exceed 1,5 mmol/l of that of the inlet water. 4.4.5 Continuous flow rate For duplex appliances, the softening efficiency shall be sustained under continuous operation (24 h per day) with test water defined in 7.1.2. The contact time shall ensure sufficient dissolution of the salt in the salt tank at the continuous flow rate in order to comply with treated water quality and brine efficiency as defined in 4.4.4 and 4.4.2. 4.4.6 Pressure drop The pressure drop at the nominal flow rate shall be no greater than 100 kPa, when the bypass valve and blending valve, if fitted, are closed and shall be verified in accordance with 7.5.2. SIST EN 14743:2006+A1:2007
EN 14743:2005+A1:2007 (E) 11 4.4.7 Exchange capacity The exchange capacity, calculated by taking the arithmetic mean of five measurements in accordance with 7.5.4, shall be at least 90 % of the exchange capacity specified by the manufacturer. 4.5 Installation specifications 4.5.1 Connection to mains water supply and existing pipe network The softener shall include the following equipment: a) isolating valves upstream and downstream from the softening unit, b) general bypass valve which enables the softening unit to be isolated from the mains, while maintaining water supply to the end-user. 4.5.2 Drain The independent regenerant drain and brine tank overflow shall each incorporate a backflow prevention device which has an air gap of 20 mm minimum. 4.5.3 Electrical connection The electrical connection of the softening unit shall conform to EN 60335-1. 5 Labelling 5.1 Identification of equipment The name of the manufacturer or supplier, and trade mark, shall be clearly visible on the installation. A rating plate fixed on the softening unit, shall give information on the type of equipment and serial number or manufacturing date. 5.2 Safety labelling A rating plate, fixed to the softening unit, combined with or separate from the one indicated in 5.1, shall give the following minimum information: a) class of pressure (PN); b) working temperature range; c) electrical connections: voltage, frequency; d) power rating; e) protection class. The rating plate shall indicate clearly to initiate an operation of full regeneration, in event of the softener being out of service for periods longer than 96 h. SIST EN 14743:2006+A1:2007
EN 14743:2005+A1:2007 (E) 12 6 Technical documentation Each softener shall be accompanied by technical documentation, in the language of the country where it is installed. In addition to the information defined in Clause 5, this European Standard shall give all necessary information and instructions for sizing, installation, operation and maintenance, and at the very least: a) volume of resin; b) nominal flow rate; c) exchange capacity and brine efficiency; d) dimensions, service weight; e) type and size of fitting/plumbing connections; f) maximum power rating; g) continuous flow rate (for duplex appliances); h) salt and other reagent consumption; i) regeneration water; j) details of operation, safety devices, devices for backflow prevention; k) additional features (see 4.1, NOTE); l) instructions for sizing; m) instructions for installation; n) instructions for commissioning; o) instructions for shutting down and safe operation; p) instructions for maintenance. 7 Test methods 7.1 Test conditions 7.1.1 Ambiant air The temperature of the environment in the immediate vicinity of the test rig shall be (20 ± 5) °C. 7.1.2 Water and salt The water supply used to verify compliance of a softener with this European Standard shall be controlled, throughout the test, to the following quality parameters:
temperature:
(15 ± 10) °C
total hardness:
(3 ± 0,5) mmol/l
chloride concentration:
< 1,5 × 10-3 mol/l SIST EN 14743:2006+A1:2007
EN 14743:2005+A1:2007 (E) 13
sodium plus potassium concentration: < 0,
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