SIST EN 14812:2006

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Water conditioning equipment inside buildings - Chemical dosing systems -Pre-set dosing systems- Requirements for performance, safety and testingOprema, ki se uporablja za pripravo pitne vode v stavbah – Naprave za doziranje kemikalij – Prednastavljivi dozirni sistemi – Zahteve za delovanje, varnost in preskušanjeEquipement de traitement d'eau a l'intérieur des bâtiments - Systemes de dosage de réactifs chimiques - Systemes de dosage non ajustables - Exigences relatives aux performances, a la sécurité et aux essaisAnlagen zur Behandlung von Trinkwasser innerhalb von Gebäuden - Dosiersysteme - Nicht einstellbare Dosiersysteme - Anforderungen an Ausführung, Sicherheit und PrüfungTa slovenski standard je istoveten z:EN 14812:2005SIST EN 14812:2006en91.140.60Sistemi za oskrbo z vodoWater supply systems13.060.20Pitna vodaDrinking waterICS:SLOVENSKI
STANDARDSIST EN 14812:200601-marec-2006







EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 14812October 2005ICS 91.140.60 English VersionWater conditioning equipment inside buildings-Chemical dosingsystems-Pre-set dosing systems- Requirements forperformance, safety and testingEquipement de traitement d'eau à l'intérieur des bâtiments -Dispositifs de dosage de réactifs chimiques - Exigences deperformances, de sécurité et d'essaisAnlagen zur Behandlung von Trinkwasser innerhalb vonGebäuden - Dosiersysteme - Anforderungen anAusführung, Sicherheit und PrüfungThis European Standard was approved by CEN on 26 August 2005.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Central Secretariat or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2005 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 14812:2005: E



EN 14812:2005 (E) 2 Contents Page Foreword.4 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.7 4.3 Venting.7 4.4 Radio interference and electrical safety.7 4.5 Dosing agent containers.7 4.6 Accessibility.7 4.7 Nominal size.7 5 Performance requirements.8 5.1 Dosing and dosing agents.8 5.1.1 Dosing agents.8 5.1.2 Dosing.8 5.2 Working ranges.8 5.3 Protection against backflow of proprietary chemical.9 5.4 Working temperature range.9 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 hammer.9 6 Testing.9 6.1 General.9 6.2 Dosing and dosing agents.10 6.2.1 Test rig.10 6.2.2 Analysis.11 6.2.3 Quality of 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 ranges.12 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 range.12 6.5.2 Static pressure.13 6.5.3 Dynamic pressure.13 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 Manufacturer's product information.14 Annex A (informative)
Examples of connections.15



EN 14812:2005 (E) 3 Bibliography.16



EN 14812:2005 (E) 4 Foreword This European Standard (EN 14812:2005) has been prepared by Technical Committee CEN/TC 164 “Water supply”, the secretariat of which is held by AFNOR. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by April 2006, and conflicting national standards shall be withdrawn at the latest by April 2006. 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 in 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, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.



EN 14812:2005 (E) 5 1 Scope This European Standard specifies definitions, principles 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 [7]) which are permanently connected to the mains 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 806-2, 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
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, Household 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 requirements (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, Water 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 – Part 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) 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)
1 Observe transition period for EN 60335-1(1994) ending 2008-07-01.



EN 14812:2005 (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 definitions 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 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 drop 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 form 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 system 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 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 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 (E) 7 4.2 Connections Examples of connections 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 supplied 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 (see [8], [9]). 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 of 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 parts 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, s
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