1、BS EN 15848:2010ICS 13.060.20; 91.140.60NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDWater conditioningequipment insidebuildings Adjustable chemicaldosing systems Requirements forperformance, safetyand testingThis British Standardwas published under theauthor
2、ity of the StandardsPolicy and StrategyCommittee on 31 March2010 BSI 2010ISBN 978 0 580 63362 1Amendments/corrigenda issued since publicationDate CommentsBS EN 15848:2010National forewordThis British Standard is the UK implementation of EN 15848:2010.The UK participation in its preparation was entru
3、sted to TechnicalCommittee B/504/-/13, Water treatment equipment.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisionsof a contract. Users are responsible for its correct application.
4、Compliance with a British Standard cannot confer immunityfrom legal obligations.BS EN 15848:2010EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 15848 February 2010 ICS 13.060.20; 91.140.60 English Version Water conditioning equipment inside buildings - Adjustable chemical dosing systems - Requi
5、rements for performance, safety and testing Appareils de traitement deau lintrieur des btiments - Systmes de dosage chimique ajustables - Exigences de performance, de scurit et essais Anlagen zur Behandlung von Trinkwasser innerhalb von Gebuden - Einstellbare Dosiersysteme - Anforderungen an Ausfhru
6、ng, Sicherheit und Prfung This European Standard was approved by CEN on 9 January 2010. 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 list
7、s 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 resp
8、onsibility 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, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, H
9、ungary, 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 NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Ce
10、ntre: Avenue Marnix 17, B-1000 Brussels 2010 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 15848:2010: EBS EN 15848:2010EN 15848:2010 (E) 2 Contents Page Foreword 31 Scope 42 Normative references 43 Terms and definitions .44 Desi
11、gn requirements .54.1 General 54.2 Dosing system components .54.3 Materials of construction 54.4 Venting 54.5 Radio interference and electrical safety 54.6 Accessibility .54.7 Nominal size .54.8 Manual mode 65 Performance requirements .65.1 Chemicals .65.2 Dosing system components .65.3 Protection a
12、gainst overdosing .75.4 Working temperature range 75.5 Pressure conditions 76 Testing 86.1 General 86.2 Operating characteristics .86.3 Pressure test . 107 Labelling 10Annex A (normative) Installation, operation and maintenance . 11Bibliography . 15BS EN 15848:2010EN 15848:2010 (E) 3 Foreword This d
13、ocument (EN 15848:2010) 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 August 2010,
14、and conflicting national standards shall be withdrawn at the latest by August 2010. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. NO
15、TE 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. On April 2006, EC Commission set up a revised mandate (M/136) asking CEN to propose harmonised product standards
16、and support standards for test methods which could be used for assessing the fitness for contact with drinking water. In parallel, EC Commission has launched processes for a regulation of construction products (CPR) to be substituted to CP directive (89/106/EC) and for the revision of drinking water
17、 directive (98/83/EC). If relevant, when the outputs of these processes are known, European product standards will be amended by the addition of an Annex Z under Mandate M136 which will contain formal references to the applicable requirements. Until such amendments, the current national regulations
18、remain applicable. 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, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungar
19、y, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 15848:2010EN 15848:2010 (E) 4 1 Scope This European Standard specifies definitions, principles of constructio
20、n (but not dimensions) and design, requirements on performance and operation as well as methods for testing the performance of adjustable chemical dosing systems for conditioning water intended for human consumption inside buildings (see 1) which are permanently connected to the mains supply. The co
21、ncentration in the treated water of the active chemical(s) as well as of any other ingredient or minor component (including possible contaminants) should not exceed the parametric values laid down in the existing legislation in the Member States for the water intended for the human consumption, as i
22、mplemented by the national authorities. 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 amendme
23、nts) applies. EN 55011, Industrial, scientific and medical (ISM) radio-frequency equipment Electromagnetic disturbance characteristics Limits and methods of measurement (CISPR 11:2003 + A1:2004, modified) EN 60204-1, Safety of machinery Electrical equipment of machines Part 1: General requirements (
24、IEC 60204-1:2005, modified) EN 60335-1, 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 ISO 12100-1, Sa
25、fety of machinery Basic concepts, general principles for design Part 1: Basic terminology, methodology (ISO 12100-1:2003) 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
26、 document, the following terms and definitions apply. 3.1 adjustable dosing system device used for the controlled addition of chemicals in concentrations that can be adjusted on the installation site 3.2 working range range of treated water flow rates between which the dosing system provides the req
27、uired accuracy of concentration of the chemicals within limits of concentration and pressure drop prescribed by the manufacturer. NOTE The working range covers the range between the upper and lower working limits. 3.3 dosing agent active chemical substance for conditioning water intended for human c
28、onsumption BS EN 15848:2010EN 15848:2010 (E) 5 4 Design requirements 4.1 General The dosing system shall function to maintain a specific concentration of the chemical in the treated water. 4.2 Dosing system components A dosing system comprises the following elements: a) storage tank or chemical cont
29、ainer which contains the chemical as a liquid that will be dosed into the water pipe; b) suction device which comprises a suction hose and a foot valve; c) low level detection avoiding the pump to work when storage is empty; d) dosing pump that pumps the chemical as a liquid from the storage tank or
30、 container and doses it into the main water flow; e) overpressure valve as safety apparatus to avoid overpressure in the injection device; f) injection device which comprises the hose between the pump and the mains, the injection valve and the backflow preventer; g) water meter in the main water flo
31、w which transmits a control signal to the dosing pump. 4.3 Materials of construction Parts in contact with drinking water shall comply with national regulations. The temperature resistance of the injection system shall be specified. 4.4 Venting The dosing system shall be designed so that accumulatio
32、n of air or other gases is prevented. Compliance with this requirement shall be checked by examination of the detailed technical design documents supplied with the system. 4.5 Radio interference and electrical safety The dosing system shall conform to EN 12100-1, EN 12100-2, EN 55011, EN 60204-1, EN
33、 60335-1 and EN 60335-2-41, following the provisions of Directive 89/336/EEC 2 and Directive 73/23/EEC 3. 4.6 Accessibility All parts which have to be accessed for replenishing of the dosing agent and for operation or servicing shall be easily accessible. 4.7 Nominal size If the dosing pump is contr
34、olled by signals from a water meter, the nominal size of its connection shall correspond to the flow rates given in Table 1. The inlet connection size of the water meter may be one size larger or smaller than the nominal size. For flange connections, the inlet flange shall conform to the nominal siz
35、e. BS EN 15848:2010EN 15848:2010 (E) 6 Table 1 Upper limit flow rate values Nominal size DN of water meter 15 20 25 32 40 50 65 80 100 Upper limit of flow rate l/s 0,35 0,63 1,0 1,6 2,53 3,89 6,67 10 15,56m3/h 1,27 2,27 3,6 5,8 9,1 14 24 36 56 NOTE These flow rates correspond to a velocity of approx
36、imately 2 m/s. 4.8 Manual mode The dosing system shall have an indication when a manual mode is activated, for example, for maintenance. 5 Performance requirements 5.1 Chemicals The documentation shall define which chemicals are compatible with the dosing system and at which maximum concentration. A
37、ll the dosed chemicals shall conform to the relevant European Standards. 5.2 Dosing system components 5.2.1 Storage tank or chemical container Materials selected for the manufacture of the dosing tank shall protect the contents against contamination or degradation by corrosion, light, dust, particle
38、s or any external pollutant. The design of the connection between the dosing tank and the dosing pump shall exclude any accidental contamination of the contents during either normal operation or chemical replacement; leakage of the chemical to the external environment of the system. The normal worki
39、ng capacity of the chemical storage tank or container shall not exceed three months based on the minimum dosing rate for the designated chemical. 5.2.2 Suction device The suction device shall have a backflow preventer. 5.2.3 Low level detection The low level detection shall as a minimum stop the pum
40、p when the storage is empty. 5.2.4 Dosing pump The manufacturer shall specify the dosing pump operating characteristics (maximum volume per stroke at maximum and medium specified operating pressure), all of which shall be tested separately. Measurements shall be carried out in accordance with to 6.2
41、. Parameters are given in Table 2. BS EN 15848:2010EN 15848:2010 (E) 7 Table 2 Test parameters Stroke length of dosing pump (%) 30 60 100 Operating pressure (MPa) Maximum specified operating pressure Medium specified operating pressure 5.2.5 Overpressure valve Overpressure valves are meant to avoid
42、damage of the connection between the pump and the injecting point, if applicable. 5.2.6 Injection device Injection devices shall be designed such that backflow of drinking water into the storage tank or chemical container is prevented. 5.2.7 Water meter Water meters shall comply with the relevant Eu
43、ropean Standards. 5.3 Protection against overdosing Dosing systems shall be designed so that overdosing due to siphonic action or gravity flow into the drinking water supply cannot occur under any operating conditions. It shall be made sure with suitable techniques that setting parameters cannot be
44、changed unauthorised or mistakenly, or be exceeded. 5.4 Working temperature range The maximum temperature shall be at least 30 C for the water and the ambient air, in which the dosing system including accessories and fittings shall operate correctly. 5.5 Pressure conditions 5.5.1 Nominal pressure an
45、d working pressure range The manufacturer shall specify the minimum and maximum working pressures between which the dosing system including accessories and fittings will operate correctly at the maximum permissible water and ambient temperatures. Testing shall be carried out in accordance with 6.3.
46、5.5.2 Effects of pressure on dosing Water pressure variations may influence the dosing rate. The manufacturers instructions shall specify any additional equipment which may be necessary to correct for any such pressure variations. BS EN 15848:2010EN 15848:2010 (E) 8 6 Testing 6.1 General Unless othe
47、rwise stated, tests shall be carried out at ambient temperature between 15 C and 25 C with water of between 10 C and 30 C. 6.2 Operating characteristics 6.2.1 Apparatus a) weighing scales with a maximum inaccuracy of 1 %; b) timer with a minimum accuracy of 1 s. The pump is timer controlled; c) test
48、 liquid is water with a conductivity 10 S/cm; d) test rig in accordance with Figure 1. BS EN 15848:2010EN 15848:2010 (E) 9 Dimensions in millimetres Key 1 Scales 2 Water tank 3 Backflow preventer 4 Dosing pump 5 Metering valve with 0,5 MPa spring (size in accordance with pump valve) 6 Pressure gauge
49、 7 Pressure regulating valve Figure 1 Test rig for flow rate test 6.2.2 Procedure a) Record the temperature and operating pressure. b) Start the pump for a few minutes to purge the air. c) Check that the water runs out of the pressure regulating valve. Adjust the valve to set pressure at maximum specified operating pressure of the pump, and check for any leakage or damage. d) Stop the pump. e) Reset the weighing scales. f) Adj
