SIST EN 15219:2007+A1:2008
(Main)Water conditioning equipment inside buildings - Nitrate removal devices - Requirements for performance, safety and testing
Water conditioning equipment inside buildings - Nitrate removal devices - Requirements for performance, safety and testing
This European Standard specifies requirements relating to the construction and mode of operation and relevant methods for testing automatic, salt-regenerated, anion exchange nitrate removal devices for drinking water installations inside buildings, which are permanently connected to the mains supply.
Anlagen zur Behandlung von Trinkwasser innerhalb von Gebäuden - Nitratentfernungsanlagen - 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 Anionenaustausches wirkende Nitratentfernungsgeräte für Trinkwasser-Installationen in Gebäuden, die dauerhaft an die Wasserversorgung angeschlossen sind, fest.
ANMERKUNG Produkte für die Verwendung in Wasserversorgungssystemen müssen, soweit 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. Bis das EAS in Kraft gesetzt ist, bleiben die derzeitigen nationalen Vorschriften anwendbar.
Appareils de traitement d'eau à l'intérieur des bâtiments - Dispositifs de dénitratation - Exigences de performances, de sécurité et d'essais
La présente Norme européenne spécifie les exigences relatives à la construction et au mode de fonctionnement des dispositifs de dénitratation automatiques, régénérés par le sel, échangeurs d’anions, utilisés dans les installations d’alimentation en eau potable à l’intérieur des bâtiments et raccordés en permanence à l’alimentation principale.
NOTE Les produits destinés à être utilisés dans les systèmes d’alimentation en eau doivent respecter, le cas échéant, les réglementations nationales et les dispositifs d’essai assurant leur adéquation pour être mis en contact avec de l’eau potable. Les organismes de réglementation des États membres correspondants et la Commission CE se sont mis d’accord sur le principe d’un Système européen d’acceptation unique (EAS), prévoyant des méthodes d’essai communes et une approbation à l’échelle européenne.
Si l’EAS est adopté ou quand il le sera, les Normes européennes relatives aux produits seront amendées par l’ajout d’une Annexe Z/EAS dans le cadre d’un Mandat M/136, comprenant des références formelles aux essais, à la certification et aux exigences de marquage des produits de l’EAS. Jusqu’à l’entrée en vigueur de l’EAS, les réglementations nationales actuelles restent en vigueur.
Oprema za pitno vodo v stavbah - Naprave za odstranjevanje nitratov - Zahteve za delovanje, varnost in preskusne metode
General Information
Relations
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Oprema za pitno vodo v stavbah - Naprave za odstranjevanje nitratov - Zahteve za delovanje, varnost in preskusne metodeAnlagen zur Behandlung von Trinkwasser innerhalb von Gebäuden - Nitratentfernungsanlagen - Anforderungen an Ausführung, Sicherheit und PrüfungAppareils de traitement d'eau à l'intérieur des bâtiments - Dispositifs de dénitratation - Exigences de performances, de sécurité et d'essaisWater conditioning equipment inside buildings - Nitrate removal devices - Requirements for performance, safety and testing91.140.60Sistemi za oskrbo z vodoWater supply systems13.060.20Pitna vodaDrinking waterICS:Ta slovenski standard je istoveten z:EN 15219:2006+A1:2007SIST EN 15219:2007+A1:2008en,fr,de01-februar-2008SIST EN 15219:2007+A1:2008SLOVENSKI
STANDARD
SIST EN 15219:2007+A1:2008
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 15219:2006+A1
November 2007 ICS 91.140.60 Supersedes EN 15219:2006 English Version
Water conditioning equipment inside buildings - Nitrate removal devices - Requirements for performance, safety and testing
Appareils de traitement d'eau à l'intérieur des bâtiments - Dispositifs de dénitratation - Exigences de performances, de sécurité et d'essais
Anlagen zur Behandlung von Trinkwasser innerhalb von Gebäuden - Nitratentfernungsanlagen - Anforderungen an Ausführung, Sicherheit und Prüfung This European Standard was approved by CEN on 4 November 2006 and includes Amendment 1 approved by CEN on 21 October 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 15219:2006+A1:2007: ESIST EN 15219:2007+A1:2008
EN 15219:2006+A1:2007 (E) 2 Contents Page Foreword.3 1 Scope.4 2 Normative references.4 3 Terms and definitions.5 4 Requirements.7 4.1 Nitrate removal devices specification.7 4.2 Quality of materials and chemicals.7 4.3 Design and manufacturing specifications.7 4.4 Operating specifications.9 4.5 Installation specifications.10 5 Labelling.10 5.1 Identification of equipment.10 5.2 Safety labelling.10 6 Technical documentation.10 7 Test methods.11 7.1 Test conditions.11 7.2 Anion exchange resin.13 7.3 Technical documentation.13 7.4 Manufacturing tests.13 7.5 Operating characteristics.15 Annex A (informative)
Principles of nitrate reduction using anionic exchange resins.18 Annex B (normative)
Installation, operation and maintenance.20 Bibliography.25
SIST EN 15219:2007+A1:2008
EN 15219:2006+A1:2007 (E) 3 Foreword This document (EN 15219:2006+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 May 2008 and conflicting national standards shall be withdrawn at the latest by May 2008. This document includes Amendment 1, approved by CEN on 2007-10-21. This document supersedes EN 15219:2006. The start and finish of text introduced or altered by amendment is indicated in the text by tags ! ". With respect of potential adverse effects on the quality of water intended for human consumption caused by the product covered by this European Standard, the following is pointed out to the user: 1) this European Standard provides no information as to whether the product may be used without restriction in any of the Member States; 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 15219:2007+A1:2008
EN 15219:2006+A1:2007 (E) 4 1 Scope This European Standard specifies requirements relating to the construction and mode of operation and relevant methods for testing automatic, salt-regenerated, anion exchange nitrate removal devices for drinking water installations inside buildings, which are permanently connected to the mains supply. NOTE Products intended for use in water supply systems are to comply, when existing, with national regulations and testing arrangements that ensure fitness for contact with drinking water. The Member State’s relevant regulators and the EC Commission agreed on the principle for 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. Until the EAS comes into force, the current national regulations remain applicable. 2 Normative references The following referenced documents are indispensable for the application of this document. 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 water installations and general requirements of devices to prevent pollution by backflow EN 14743, Water conditioning equipment inside buildings — Softeners — Requirements for performance, safety and testing !EN 15161, Water conditioning equipment inside buildings — Installation, operation, maintenance and repair" 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) EN 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
(ISO 3822-3:1984) 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 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 15219:2007+A1:2008
EN 15219:2006+A1:2007 (E) 5 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 blending device internal or external device used to blend treated with untreated 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 nitrate ions fixed during the service run by chloride ions, and thereby recovering the exchange capacity of the resin bed 3.3 brining efficiency link, expressed in grams of nitrate ion (NO3-) per kilogram of salt, between the exchange capacity and the salt consumption 3.4 anion exchange resin synthetic material that has the capability to exchange anions reversibly 3.5 continuous flow rate maximum flow rate at which a duplex appliance can operate continuously (24 h a day) without a premature breakthrough of nitrate 3.6 duplex appliance system employing two resin tanks, enabling the production of uninterrupted treated water supply 3.7 exchange capacity of the nitrate removal unit quantity of nitrate, expressed in grams of nitrate ion, fixed by the device 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 unit is available for service. NOTE 2 The resin is considered to be exhausted when the residual nitrate concentration of the treated 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 treated water run (or service) and the regeneration run SIST EN 15219:2007+A1:2008
EN 15219:2006+A1:2007 (E) 6 3.11 operating range physical and chemical conditions (temperature, pressure, flow rate, chemical water composition) within which a nitrate removal unit can operate and meet its performance guarantees 3.12 pressure drop decrease in pressure between the inlet and outlet of the unit, expressed in kilopascals, at nominal flow rate 3.13 regeneration process part of 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 nitrate concentration nitrate concentration of water sampled at the outlet of a unit 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 nitrate removal device complete installation necessary for the production of treated water 3.19 nitrate removal unit appliance employing the anion exchange principle and which generally comprises the following constituent parts: pressure vessel containing the anionic 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 3.20 volume of resin quantity of anion exchange resin, expressed in litres, indicated on the rating plate or in the technical documentation SIST EN 15219:2007+A1:2008
EN 15219:2006+A1:2007 (E) 7 4 Requirements 4.1 Nitrate removal devices specification Nitrate removal devices shall include all of following features and equipment: 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. Some devices in the market are intended to remove nitrates and to soften water simultaneously (see Annex A). These are commonly known as “mixed beds” and include a mixture of anionic and cationic resin that regenerates simultaneously. These devices shall comply with this European Standard and also with EN 14743, except for the items stated in 4.3.8 and 4.4.4 and relevant tests that are specifically covered in this European Standard for this kind of devices. NOTE When necessary to meet national or local provisions, the nitrate removal devices may be required to include additional features; for example: automatic initiated regeneration after a certain period without regeneration; feature to control microbiological growth. 4.2 Quality of materials and chemicals 4.2.1 Anion exchange resin The anion exchange resin used in the nitrate removal device shall be certified by the resin manufacturer to be suitable for its intended application. 4.2.2 Regenerating salt Salt shall comply with national and local regulations. All requirements of this European Standard are based on the use of sodium chloride (NaCl) in accordance with EN 973 as regenerating salt. NOTE Some countries also allow the use of potassium chloride (KCl) as regenerating salt. 4.3 Design and manufacturing specifications 4.3.1 Resistance to hydrostatic pressure The nitrate removal unit shall resist, without visible damage nor leakage, a hydrostatic pressure of 1,5 times the maximum design pressure or 1 000 kPa, whichever is the greater for 10 20+ min as defined in 7.4.1. 4.3.2 Resistance to cyclic pressure The nitrate removal 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. SIST EN 15219:2007+A1:2008
EN 15219:2006+A1:2007 (E) 8 4.3.3 Minimum and maximum operating pressure When tested in accordance with 7.1.3 d), the nitrate removal device 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. 4.3.4 Resistance to temperature The nitrate removal device 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 Nitrate removal 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 nitrate removal device design shall permit continuity of the water supply during regeneration (see 7.4.3). 4.3.8 Protection against backflow and infiltration of brine a) Nitrate removal device shall include an appliance to prevent backflows into the main supply, in accordance with the national implementation of EN 1717. If such an appliance is not evident, the nitrate removal device shall be tested in accordance with 7.4.4.1. There shall be no water or brine collected from the vacuum reservoir. b) Infiltration of brine into the treated 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 nitrate removal 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. 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 device 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. SIST EN 15219:2007+A1:2008
EN 15219:2006+A1:2007 (E) 9 4.4 Operating specifications 4.4.1 Initiation of regeneration Regeneration shall be initiated automatically (see 7.5.3.2 a)). Each nitrate removal unit shall also be equipped with a provision for manual initiation of regeneration (see 7.5.3.1). For a timer controlled device 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 device the volume of water treated between regenerations shall be within 10 % of the programmed water volume (see 7.5.3.2 c)). For a device which regenerates on the detection of exhaustion of the resin, the exchange capacity of the unit 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 When measured under the conditions defined in 7.5.4 and 7.5.5, each kilogram of salt used during a regeneration shall produce a minimum exchange capacity of 140 g (2,26 mol) of nitrate ion. 4.4.3 Regeneration water When measured in accordance with 7.5.6, the volume of water necessary for a complete regeneration shall not be more than 0,40 l/g of nitrate ion fixed between two regenerations. 4.4.4 Quality of treated water after regeneration When tested in accordance with 7.5.7, the sodium content after a regeneration shall not exceed 1,5 mmol/l of that of the inlet water. For mixed beds (see 4.1 and Annex A), in which sodium concentration is modified by the softening resin, to the obtained value in 7.5.7 shall be deducted the sodium increase due to softening resin exchange (see 7.5.7). 4.4.5 Continuous flow rate For duplex appliances, the nitrate removal efficiency shall be sustained under continuous operation (24 h a day) with test water as 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 4.4.2 and 4.4.4. 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. 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. SIST EN 15219:2007+A1:2008
EN 15219:2006+A1:2007 (E) 10 4.5 Installation specifications 4.5.1 Connection to mains water supply and existing pipe network The nitrate removal device shall include the following equipment: a) isolating valves upstream and downstream from the nitrate removal unit; b) general bypass valve that enables the nitrate removal unit to be isolated from the mains, while
maintaining the 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 at least 20 mm. 4.5.3 Electrical connection The electrical connection of the nitrate removal 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 nitrate removal 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 nitrate removal 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; f) resin type (only for mixed beds). The rating plate shall indicate clearly to initiate an operation of full regeneration, in event of the device being out of service for periods longer than 96 h. 6 Technical documentation Each device 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 document shall give all the necessary information and instructions for sizing, installation, operation and maintenance, and at the very least: SIST EN 15219:2007+A1:2008
EN 15219:2006+A1:2007 (E) 11
a) volume of resin; b) nominal flow rate; c) exchange capacity and brine efficiency in accordance with this European Standard, i.e. EN 15219 and EN 14743, if the device incorporates hardness reduction by cation exchange; 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 Ambient 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 raw water supply used to verify compliance of a nitrate removal device with this European Standard shall comply with the following quality parameters:
temperature:
(15 ± 10) °C;
conductivity:
< 100 µS/cm;
chloride concentration:
< 1,5 x 10-3 mol/l;
total iron concentration:
< 0,2 mg/l. SIST EN 15219:2007+A1:2008
EN 15219:2006+A1:2007 (E) 12 For the tests, add sodium nitrate solution (NaNO3) and sodium sulphate solution (Na2SO4) (both reagent grade) to raw water using dosing pumps, to obtain the test water with the following concentrations which shall be maintained throughout the tests: - nitrate ion (NO3-):
(150 ± 10) mg/l; - sulphate ion (SO−24):
(150 ± 10) mg/l. The test water may alternatively be prepared as a bulk solution that contains these nitrate and sulphate ion concentrations to avoid the use of doing pumps. The salt used for tests shall conform to the requirements of EN 973. 7.1.3 Test rig a) Test rig shall be equipped with a water meter and flow meter. Connect the device to the water supply, power supply (if appropriate) and drain in accordance with the manufacturer's instruction (see
Clause 6 m)). Include all of the components supplied that are appropriate for the installation including hoses, bypass valves, connectors etc. b) Commission the device in accordance with the manufacturer's instructions (see Clause 6 n)). c) Operate the device for at least 15 cycles (two cycles for units with more than 50 l of resin), including service and regeneration at a service flow rate of at least 30 % of the nominal flow rate for the nitrate removal device. The minimum time between two regenerations specified by the manufacturer shall be respected. For volume and resin exhaustion initiated regeneration, allow the automatic system to initiate regeneration. For timer controlled devices, regeneration shall be initiated manually, based on its rated capacity for the test water composition. d) After a service break of 24 h operate for a further five operating cycles, using the same operating conditions as those used above, to verify the performance of the device with respect to its operating characteristics (see 7.5). At least one of these runs shall be carried out with the supply pressure reduced to 200 kPa and at least one at a maximum of 60 % of the maximum design pressure as indicated in 4.3.3 with a minimum of 600 kPa. 7.1.4 Analysis 7.1.4.1 Nitrate Determine the concentration of nitrate ion in accordance with EN ISO 10304-1. 7.1.4.2 Sodium Determine the concentration of sodium ion in accordance with EN ISO 11885. SIST EN 15219:2007+A1:2008
EN 15219:2006+A1:2007 (E) 13 7.1.4.3 Total hardness a) Determine total hardness in accordance with EN ISO 11885. NOTE Alternative methods may be used provided that they give equivalent results. b) Calculate the total hardness according to Equation (1):
TH = [Ca2+] + [Mg2+]
(1) where
TH
is the total hardness, in mmol/l;
[Ca2+]
is the calcium concentration, in mmol/l;
[Mg2+]
is the magnesium concentration, in mmol/l. 7.2 Anion exchange resin The manufacturer shall provide documentary evidence of conformity with the requirements for resins in contact with drinking water (see 4.2.1). 7.3 Technical documentation From the manufacturer's documentation provided with the nitrate removal device, confirmed by thorough examination, that the minimum information requirements stipulated in Clause 6 are included. 7.4 Manufacturing tests 7.4.1 Resistance to hydrostatic pressure a) All components supplied with the nitrate removal device shall be included in the hydrostatic pressure test. b) If an unused device is tested, carry out at least one regeneration to ensure that air is expelled from the pressure vessel, control head and associated components. c) Locate all components behind a safety screen. d) Close the outlet isolation valve. e) Leave the drain connection free and in a visible position. f) Connect a manually operated hydraulic pressure testing pump, with a safety pressure gauge, to the inlet of the device. Develop the hydrostatic test pressure of 1 000 kPa over a minimum period of 30 s with the water at ambient temperature. The pressure shall be maintained for 1020+ min. g) There shall be no visible evidence of damage or leakage. h) Slowly release the pressure after the test. 7.4.2 Resistance to cyclic pressure a) All of the components supplied with the nitrate removal device shall be included in the cyclic pressure test. b) If an unused nitrate removal device is tested, carry out at least one regeneration to ensure that air is expelled from the pressure vessel, control head and associated components. SIST EN 15219:2007+A1:2008
EN 15219:2006+A1:2007 (E) 14 c) Locate all components behind a safety screen. d) Connect a pump, capable of delivering a pressure of at least 1,5 times the maximum design pressure at the nominal flow rate of the device, via a pressure gauge to the inlet of the nitrate removal device. e) Connect the outlet through an automatic valve and isolation valve to a tank feeding the suction of the pump. The automatic valve shall be equipped with an adjustable limit closing stop. f) Start the pump and throttle the outlet isolation valve, with the automatic valve fully open, to give an inlet pressure of 150 kPa. g) Adjust the limit stop on the automatic
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.