SIST EN 14743:2006
(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.
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.
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 müssen, 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.
Equipement de traitement d'eau a l'intérieur des bâtiments - Adoucisseurs - Exigences de performances, de sécurité et d'essai
La présente Norme européenne spécifie les exigences relatives a la construction, au mode de fonctionnement et aux méthodes d’essai correspondantes des adoucisseurs automatiques, échangeurs de cations, a sel régénérant, destinés a des installations d’alimentation en eau potable a l’intérieur des bâtiments et raccordés en permanence a l’alimentation principale.
Les réglementations nationales actuelles restent applicables tant que le Systeme européen d’acceptation (SEA) n’est pas entré en vigueur.
NOTE Il convient que les produits destinés a un usage dans des systemes 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.
A 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 matiere 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)
SLOVENSKI STANDARD
SIST EN 14743:2006
01-marec-2006
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GHORYDQMHYDUQRVWLQSUHVNXãDQMH
Water conditioning equipment inside buildings - Softeners - Requirements for
performance, safety and testing
Anlagen zur Behandlung von Trinkwasser innerhalb von Gebäuden - Enthärter -
Anforderungen an Ausführung, Sicherheit und Prüfung
Equipement de traitement d'eau a l'intérieur des bâtiments - Adoucisseurs - Exigences
de performances, de sécurité et d'essai
Ta slovenski standard je istoveten z: EN 14743:2005
ICS:
13.060.20 Pitna voda Drinking water
71.100.80 .HPLNDOLMH]DþLãþHQMHYRGH Chemicals for purification of
water
91.140.60 Sistemi za oskrbo z vodo Water supply systems
SIST EN 14743:2006 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN 14743:2006
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SIST EN 14743:2006
EUROPEAN STANDARD
EN 14743
NORME EUROPÉENNE
EUROPÄISCHE NORM
October 2005
ICS 91.140.60
English Version
Water conditioning equipment inside buildings - Softeners -
Requirements for performance, safety and testing
Equipement de traitement d'eau à l'intérieur des bâtiments - Anlagen zur Behandlung von Trinkwasser innerhalb von
Adoucisseurs - Exigences de performances, de sécurité et Gebäuden - Enthärter - Anforderungen an Ausführung,
d'essais Sicherheit und Prüfung
This 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 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 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 translation
under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official
versions.
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 STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36 B-1050 Brussels
© 2005 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 14743:2005: E
worldwide for CEN national Members.
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SIST EN 14743:2006
EN 14743:2005 (E)
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
2
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SIST EN 14743:2006
EN 14743:2005 (E)
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
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SIST EN 14743:2006
EN 14743:2005 (E)
Foreword
This European Standard (EN 14743:2005) 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 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, 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.
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SIST EN 14743:2006
EN 14743:2005 (E)
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
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SIST EN 14743:2006
EN 14743:2005 (E)
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 (CaCO ) per kilogram of salt, between the exchange capacity
3
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
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SIST EN 14743:2006
EN 14743:2005 (E)
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
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SIST EN 14743:2006
EN 14743:2005 (E)
3.21
total hardness
concentration of alkaline earth ions (mainly calcium and magnesium) in water, expressed in millimoles per litre
N
...
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