prEN 17818

Devices for in-situ generation of biocides - Active chlorine generated from sodium chloride by electrolysis

This document defines the minimum requirements for treatment systems, which generate the active substance - "Active chlorine" - from sodium chloride by electrolysis for on-site (in-situ) operation.
The in-situ generated active substance (IGAS), in this case active chlorine, may be put into a solution ("off-line") or directly generated in the pipes ("in-line").
This document specifies the device construction, and test methods for the equipment used for in-situ generation of active chlorine. It specifies requirements for instructions for installation, operation, maintenance, safety and for documentation to be provided with the product.
The in-situ generation of active substances and the placing of their precursors on the EU market are subject to the specifications of the Biocidal Products Regulation (EU) 528/2012 ["Biocidal products"]). Active substances, generated by devices, which are claiming compliance with this document, shall comply with the BPR for both the registered active chlorine, quality standards and the precursor in accordance with appropriate application and "Product Type" as listed in the BPR.
This standard does not identify applications for in situ devices for generation of active chlorine. The range of applications for in-situ generation of chlorine is diverse. It is the responsibility of the economic operator/product supplier, claiming compliance with this standard, to identify the appropriate system type and operating conditions for the specific application and to:
-   specify the quality of the biocide appropriate to the application. This may be defined in national or international standards;
-   specify the appropriate product type (see Clause 7) and operating conditions (concentration, dosage rate and quality of the active chlorine);
-   specify any other regulatory requirements relevant to the specific application;
-   specify the appropriate precursor sodium chloride (natural or artificial brine), for the application;
-   and to label the product accordingly.

Anlagen zur In-Situ-Erzeugung von Bioziden - Aktives Chlor hergestellt aus Natriumchlorid durch Elektrolyse

Dieses Dokument legt die Mindestanforderungen an Aufbereitungssysteme fest, die den Wirkstoff – „aktives Chlor“ – durch Elektrolyse aus Natriumchlorid für den Betrieb vor Ort (in situ) erzeugen.
Der in-situ erzeugte Wirkstoff (IGAS, en: in-situ generated active substance), in diesem Fall aktives Chlor, darf in eine Lösung gegeben werden ("offline") oder direkt in den Rohren erzeugt werden ("inline").
Dieses Dokument legt den Bau der Anlage und die Prüfverfahren für die Ausrüstung zur In-situ-Erzeugung von aktivem Chlor fest. Es gibt die Anforderungen an Anleitungen zum Einbau, zum Betrieb, zur Wartung und zur Sicherheit sowie an die mit dem Produkt zu liefernde Dokumentation an.
Die In-situ-Erzeugung von Wirkstoffen und das Inverkehrbringen der erforderlichen Vorläufer auf dem europäischen Markt unterliegen den Angaben der Biozid-Verordnung (EU) 528/2012 ["Biozid-Produkte"]). Wirkstoffe, die von Anlagen erzeugt werden, die den Angaben zufolge die Anforderungen dieses Dokuments einhalten, müssen der Biozid-Verordnung (BPR, en: Biocidal Products Regulation) sowohl in Bezug auf das registrierte aktive Chlor als auch auf die Qualitätsstandards und die Vorläufer in Übereinstimmung mit der entsprechenden Anwendung und der in der Biozid-Verordnung aufgeführten "Produktart" entsprechen.
In dieser Norm werden keine Anwendungen für In-situ-Anlagen zur Erzeugung von aktivem Chlor festgelegt. Der Anwendungsbereich für die In-situ-Erzeugung von Chlor ist vielfältig. Es liegt in der Verantwortung des Wirtschaftsteilnehmers/Produktlieferanten, der sich zur Einhaltung dieser Norm verpflichtet, den geeigneten Systemtyp und die Betriebsbedingungen für die jeweilige Anwendung zu ermitteln und:
-   die Qualität des Biozids für die jeweilige Anwendung anzugeben. Diese ist unter Umständen in nationalen oder internationalen Normen festgelegt;
-   den geeigneten Produkttyp (siehe Abschnitt 7) und die Betriebsbedingungen (Konzentration, Dosierrate und Qualität des aktiven Chlors) anzugeben;
-   sonstige regulatorische Anforderungen, die für die jeweilige Anwendung relevant sind, anzugeben;
-   den für die Anwendung geeigneten Vorläufer Natriumchlorid (natürliche oder künstliche Sole) anzugeben;
-   und das Produkt entsprechend zu kennzeichnen.

Dispositifs pour la production in situ de biocides - Chlore actif produit par électrolyse du chlorure de sodium

Le présent document définit les exigences minimales applicables aux systèmes de traitement, qui produisent la substance active « chlore actif » par électrolyse de chlorure de sodium pour un fonctionnement sur site (in situ).
La substance active produite in situ, dans le cas présent le chlore actif, peut être mise en solution (« hors ligne ») ou directement produite dans les canalisations (« en ligne »).
Le présent document spécifie la construction du dispositif ainsi que les méthodes d’essai applicables à l'équipement utilisé pour la production in situ de chlore actif. Il spécifie les exigences relatives aux instructions d’installation, de fonctionnement, de maintenance et de sécurité, ainsi que la documentation à fournir avec le produit.
La production in situ de substances actives et la mise à disposition sur le marché européen de leurs précurseurs sont soumises aux spécifications du règlement relatif aux produits biocides (UE) n° 528/2012 [« Produits biocides »]) ou RPB. Les substances actives, produites par les dispositifs, qui revendiquent la conformité au présent document, doivent satisfaire au RPB pour le chlore actif enregistré, les normes de qualité et le précurseur selon l’application appropriée et le « type de produit » répertorié dans le RPB.
La présente norme n’identifie pas les applications relatives aux dispositifs pour la production in situ de chlore actif. La gamme d’applications pour la production in situ de chlore actif est large. Il incombe à l’opérateur économique/fournisseur qui revendique la conformité à la présente norme, d’identifier le type de système approprié et les conditions de fonctionnement pour l’application spécifique et de :
-   spécifier la qualité du biocide approprié à l’application. La qualité peut être définie dans les normes nationales ou internationales ;
-   spécifier le type de produit approprié (voir Article 7) et les conditions de fonctionnement (concentration, taux de dose et qualité du chlore actif) ;
-   spécifier toute autre exigence réglementaire correspondant à l’application spécifique ;
-   spécifier le précurseur chlorure de sodium (saumure naturelle ou artificielle) approprié pour l’application ;
-   et étiqueter le produit en conséquence.

Naprave za proizvodnjo biocidov na kraju samem - Aktivni klor, pridobljen iz natrijevega klorida z elektrolizo

General Information

• Status: Not Published
• Publication Date: 19-Oct-2023
• ICS: 13.060.20 - Drinking water
• Technical Committee: CEN/TC 164 - Water supply
• Drafting Committee: CEN/TC 164/WG 16 - In-situ generating and dosing of biocides for water treatment
• Current Stage: 4599 - Dispatch of FV draft to CMC - Finalization for Vote
• Start Date: 11-Jan-2023
• Due Date: 14-Jul-2023
• Completion Date: 11-Jan-2023
• Ref Project: oSIST prEN 17818:2022 - Devices for in-situ generation of biocides - Active chlorine generated from sodium chloride by electrolysis

Standards Content (Sample)

SLOVENSKI STANDARD
oSIST prEN 17818:2022
01-junij-2022
Naprave za proizvodnjo biocidov na kraju samem - Aktivni klor, pridobljen iz
natrijevega klorida z elektrolizo

Devices for in-situ generation of biocides - Active chlorine generated from sodium

chloride by electrolysis
Anlagen zur In-Situ-Erzeugung von Bioziden - Aktives Chlor hergestellt aus
Natriumchlorid durch Elektrolyse

Dispositifs pour la production in situ de biocides - Chlore actif produit par électrolyse du

chlorure de sodium
Ta slovenski standard je istoveten z: prEN 17818
ICS:
13.060.20 Pitna voda Drinking water
71.100.80 Kemikalije za čiščenje vode Chemicals for purification of
water
oSIST prEN 17818:2022 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN 17818:2022
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oSIST prEN 17818:2022
DRAFT
EUROPEAN STANDARD
prEN 17818
NORME EUROPÉENNE
EUROPÄISCHE NORM
April 2022
ICS 13.060.20
English Version
Devices for in-situ generation of biocides - Active chlorine
generated from sodium chloride by electrolysis

Dispositifs pour la production in situ de biocides - Anlagen zur In-Situ-Erzeugung von Bioziden - Aktives

Chlore actif produit par électrolyse du chlorure de Chlor hergestellt aus Natriumchlorid durch Elektrolyse

sodium

This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee

CEN/TC 164.

If this draft becomes a European Standard, 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.

This draft European Standard was established by CEN 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-CENELEC

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, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,

Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and

United Kingdom.

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are

aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without

notice and shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 17818:2022 E

worldwide for CEN national Members.
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Contents Page

European foreword ...................................................................................................................................................... 4

Introduction .................................................................................................................................................................... 5

1 Scope .................................................................................................................................................................... 6

2 Normative references .................................................................................................................................... 6

3 Terms and definitions ................................................................................................................................... 7

4 Empty .................................................................................................................................................................. 9

5 Requirements ................................................................................................................................................. 10

5.1 Design ................................................................................................................................................................ 10

5.1.1 Temperature................................................................................................................................................... 10

5.1.2 Backflow prevention.................................................................................................................................... 10

5.1.3 Safety ................................................................................................................................................................. 10

5.2 Performance ................................................................................................................................................... 10

5.3 Instructions ..................................................................................................................................................... 10

6 Electrolysis system and components ..................................................................................................... 10

6.1 Electrolysis cell .............................................................................................................................................. 10

6.2 Control unit ..................................................................................................................................................... 11

6.3 Optional items ................................................................................................................................................ 11

6.3.1 Flow detector .................................................................................................................................................. 11

6.3.2 System for dissipating stray electrical currents ................................................................................ 11

6.3.3 Production adjustment feature ............................................................................................................... 11

6.3.4 Temperature probe ...................................................................................................................................... 12

6.3.5 Conductivity / TDS probe ........................................................................................................................... 12

6.3.6 Buffer Tank ..................................................................................................................................................... 12

7 Process variants ............................................................................................................................................ 12

7.1 Overview of process variants ................................................................................................................... 12

7.2 Electrolysis systems with non-divided electrolysis cell ................................................................. 14

7.2.1 Processes with lower generation capacity and short-term operation ...................................... 14

7.2.2 Processes with high generation capacity and/or long-term operation .................................... 17

7.3 Electrolysis system with divided electrolysis cell (membrane or diaphragm) ...................... 18

7.3.1 Process with acidic chlorine solution .................................................................................................... 20

7.3.2 Process with neutral chlorine solution ................................................................................................. 22

7.3.3 Process with alkaline chlorine solution ............................................................................................... 23

8 Safety requirements .................................................................................................................................... 24

8.1 General requirements ................................................................................................................................. 24

8.2 Hydrogen.......................................................................................................................................................... 24

8.3 Chlorine gas .................................................................................................................................................... 25

8.4 Excess products and solutions ................................................................................................................. 25

8.5 Buffer tank ....................................................................................................................................................... 25

8.6 Safety bunds .................................................................................................................................................... 26

8.7 Prevention against backflow .................................................................................................................... 26

9 Equipment of the room or area for installation of the electrolysis system ............................. 27

10 Operation and maintenance ..................................................................................................................... 27

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11 Test requirements ........................................................................................................................................ 28

11.1 General ............................................................................................................................................................. 28

11.2 Scope of testing .............................................................................................................................................. 28

11.2.1 System documentation ............................................................................................................................... 28

11.2.2 Chemical characterization......................................................................................................................... 28

11.2.3 Determination of the active chlorine content (main constituent).............................................. 31

11.2.4 Determination of the chlorate content (ClO )................................................................................. 33

11.2.5 Specification of the chlorine solution with regards to the chlorate content (ClO ) .......... 33

11.2.6 Determination of the bromate content (BrO ) ............................................................................... 34

11.2.7 Specification of the chlorine solution with regards to the bromate content (BrO ) ......... 34

11.2.8 Determination of the chloride content (Cl ) ...................................................................................... 34

11.2.9 Specification of the chlorine solution with regards to the chloride content (Cl ) ................ 35

11.2.10 Determination of the perchlorate content (ClO ) ................................................................. 35

11.2.11 Specification of the chlorine solution with regards to the perchlorate content

(ClO ) ............................................................................................................................................................. 35

Annex A (informative) Natural decay of stored hypochlorite solutions .................................................. 36

A.1 Introduction ................................................................................................................................................... 36

A.2 Decay reactions ............................................................................................................................................. 36

A.3 Factors influencing chlorine decay and chlorate formation ......................................................... 37

A.3.1 Influence of temperature and storage time ........................................................................................ 37

A.3.2 Chlorate formation vs. time and temperature ................................................................................... 38

A.3.3 Influence of initial concentration vs. days of storage ...................................................................... 38

A.4 Influence of pH ............................................................................................................................................... 39

A.5 Influence of decay catalysers (pollutants) and prevention ........................................................... 39

Bibliography ................................................................................................................................................................. 40

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European foreword

This document (prEN 17818:2022) has been prepared by Technical Committee CEN/TC 164 “Water

supply”, the secretariat of which is held by AFNOR.
This document is currently submitted to the CEN Enquiry.

Devices according to this document may be used in different fields of application, e.g., drinking water,

swimming pool water, wastewater, air treatment, surface disinfection, etc. Additional requirements to

this document shall be observed, where appropriate for the specific application.
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Introduction

In respect of potential adverse effects on human and animal health and the environment, caused by the

product covered by this document:

a) this document provides no information as to whether the product may be used without restriction

in any of the Member States of the EU or EFTA;

b) note 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.
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1 Scope

This document defines the minimum requirements for treatment systems, which generate the active

substance - “Active chlorine” - from sodium chloride by electrolysis for on-site (in-situ) operation.

The in-situ generated active substance (IGAS), in this case active chlorine, may be put into a solution

("off-line") or directly generated in the pipes ("in-line").

This document specifies the device construction, and test methods for the equipment used for in-situ

generation of active chlorine. It specifies requirements for instructions for installation, operation,

maintenance, safety and for documentation to be provided with the product.

The in-situ generation of active substances and the placing of their precursors on the EU market are

subject to the specifications of the Biocidal Products Regulation (EU) 528/2012 [“Biocidal products”]).

Active substances, generated by devices, which are claiming compliance with this document, shall

comply with the BPR for both the registered active chlorine, quality standards and the precursor in

accordance with appropriate application and “Product Type” as listed in the BPR.

This standard does not identify applications for in situ devices for generation of active chlorine. The

range of applications for in-situ generation of chlorine is diverse. It is the responsibility of the economic

operator/product supplier, claiming compliance with this standard, to identify the appropriate system

type and operating conditions for the specific application and to:

— specify the quality of the biocide appropriate to the application. This may be defined in national or

international standards;

— specify the appropriate product type (see Clause 7) and operating conditions (concentration,

dosage rate and quality of the active chlorine);

— specify any other regulatory requirements relevant to the specific application;

— specify the appropriate precursor sodium chloride (natural or artificial brine), for the application;

— and to label the product accordingly.
2 Normative references

The following documents are referenced in the text in such a way that some parts of these or their

entire contents constitute requirements of this document. With dated references, only the referenced

issue is applicable. With undated references, the last issue of the referenced document is applicable

(including all changes).

EN 1717, Protection against pollution of potable water in water installations and general requirements of

devices to prevent pollution by backflow

EN 60751, Industrial platinum resistance thermometers and platinum temperature sensors

EN ISO 7393-1, Water quality — Determination of free chlorine and total chlorine — Part 1: Titrimetric

method using N,N-diethyl-1,4-phenylenediamine(ISO 7393-1)

EN ISO 7393-2, Water quality — Determination of free chlorine and total chlorine — Part 2: Colorimetric

method using N,N-dialkyl-1,4-phenylenediamine, for routine control purposes

EN ISO 10304-1, Water quality — Determination of dissolved anions by liquid chromatography of ions —

Part 1: Determination of bromide, chloride, fluoride, nitrate, nitrite, phosphate and sulfate

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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)

EN ISO 11206, Water quality — Determination of dissolved bromate — Method using ion chromatography

(IC) and post column reaction (PCR) (ISO 11206)

EN ISO 19340, Water quality — Determination of dissolved perchlorate — Method using ion

chromatography (IC) (ISO 19340)
ISO 3696, Water for analytical laboratory use; Specification and test methods
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

• IEC Electropedia: available at https://www.electropedia.org/
• ISO Online browsing platform: available at https://www.iso.org/obp

In addition, the terminology contained in Article 3 of the BPR is to be included in the application for this

document.
3.1
active substances
text of the definition
3.1.1
technical active substance (TAS)

active substance produced including minor constituents and any contaminants produced during the

process
3.1.2
IGAS – in situ generated active substance

biocidal active substances, when they are generated from one or more precursors at the place of use

3.2
anolyte
medium output from the anode compartment
3.3
buffer tank

one or several tanks separate from the electrolysis cell or the reactor for temporary provision of the

generated chlorine solution that is intended for the application
3.4
diaphragm

porous barrier in a divided electrolysis cell without ion selectivity between the anode and cathode

compartment of the electrolysis cell

Note 1 to entry: In contrast to the membrane, the diaphragm permits the passage of a limited quantity of

hydroxide ions from the cathode compartment to the anode compartment. This reduces the pH-value in the

cathode compartment, while the pH-value in the anode compartment increases at the same time.

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3.5
electrochlorination system

device that uses the principle of electrolysis to produce active chlorine excluding additional equipment

3.6
electrolysis cell

system in which positively charged electrodes (anodes) and negatively charged electrodes (cathodes)

are positioned face to face
3.6.1
divided electrolysis cell

electrolysis cell in which the anode and cathode compartments are divided by a membrane or

diaphragm
3.6.2
non-divided electrolysis cell

electrolysis cell in which the anode and cathode compartments are not divided, therefore enabling

unimpeded liquid, ion and gas transport in the space between the electrode pairs
3.7
expert

person who, due to their technical scientific training, work experience and knowledge of applicable

standards and regulations, is able to assess an electrolysis system with regard to functions and safety

Note 1 to entry: This person can be from the manufacturer or an independent third-party organisation (such as a

test institution) without limitations, an inspector according to EN ISO-EC 17020 Type C, fulfils this criterion.

3.8
feed water

water in accordance with the chemical requirements of the corresponding manufacturer’s

specifications for the production of sodium chloride solution and/or operation of the electrolysis

system
3.9
gas separator

system for the physical separation of gases (in this case: hydrogen/chlorine) from liquids

3.10
injector

component that enables the flow of the sodium chloride solution, the active chlorine solution, the

chlorine gas or their mixtures into a water flow, typically employing the venturi principle

3.11
in-line electrolysis

process in which the water to be treated is the operating medium and entirely fed directly into the

electrolysis cell
3.12
in-situ generation

reaction of at least one precursor to generate the technical active substance on site

3.13
membrane

cation-selective barrier in a divided electrolysis cell between the anode and cathode compartment

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Note 1 to entry: This prevents the reaction between the chlorine gas and hydroxide ions (OH−), by allowing

monovalent cations and inhibiting anions (primarily chloride) to permeate through the membrane.

3.14
nominal capacity
maximum production rate of active chlorine as specified by the manufacturer
3.15
operating media
artificial or natural sodium chloride solutions that are used for electrolysis
3.16
precursor

substance that is fed to the in-situ device for production of the biocide active substance, independent of

its disinfection or biocide-law related properties substance or mixture (formulation containing the

precursor(s)), from which an active substance (including free radicals) is generated in situ

3.17
product range

systems that operate according to the same functional principle but with different capacities

3.18
reactor

system for converting chlorine gas and sodium hydroxide into a sodium hypochlorite solution

3.19
Sodium chloride solution
3.19.1
artificial sodium chloride solution

produced using manufactured sodium chloride, e.g., in accordance with EN 14805, EN 973, EN 16370 or

EN 16401
3.19.2
natural sodium chloride solution

naturally occurring sodium chloride containing solution, such as sea water and brackish water

3.20
stability curve

representation of the chlorine content and by-products at the specified temperature over time; in

systems with buffer tanks, this forms a basic load in order to ensure that the active substance content of

the generated chlorine solution and the amount of by-products such as chlorate do not change

unacceptably during the time between generation and metering the chlorine solution in the buffer tank

3.21
system type

systems in a product range with a specific respective capacity (production capacity in kg/h chlorine)

4 Empty

NOTE The continuing numbering has been kept after merging terms and definitions 3 and 4. This needs

attention during the CEN Enquiry.
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5 Requirements

The manufacturer/supplier, claiming compliance with this standard, shall fulfil the following

requirements:
5.1 Design
5.1.1 Temperature

The equipment shall be designed to operate to the requirements of this standard with water

temperatures between 5 °C and 25 °C and with ambient temperatures between 5 °C and 35 °C

minimum. For higher temperatures, the device shall be designed accordingly.
5.1.2 Backflow prevention

If connected to a drinking water supply, the device shall be fitted with a backflow prevention device

appropriate to the application in accordance with EN 1717.
5.1.3 Safety

System design shall include appropriate measures for management of release potentially hazardous

hydrogen gas, excess chlorine and surplus production (see Clause 8). It shall include protection against

stray electrical discharge and compliance with relevant regulations to the application.

5.2 Performance

The device shall be tested at the highest active chlorine concentration and maximum production rate as

specified by the manufacturer and appropriate to the requirements of the end user application (see

Clause 11).

This test may be conducted on the manufacturer’s premises or on the installed system.

5.3 Instructions

The manufacturer/supplier of the device shall provide detailed instructions for installation (see

Clause 9), operation and maintenance for the complete system, including appropriate safety procedures

(see Clause 8).
6 Electrolysis system and components

Electrochlorination systems shall include, as a minimum, an electrolysis cell and control unit. Optional

items may also be included (see 6.3).
6.1 Electrolysis cell

The electrolysis cell comprises a vessel into which positive (anode) and negative (cathode) electrodes

are appropriately located.

The electrodes, which can vary in number, shape, material and dimensions, produce the disinfectant

and oxidizing agent under the action of the electric current.

NOTE The water supply may increase mineral deposits precipitating on the cathodes. The harder the water

(high TH), the greater the deposits, thereby significantly reducing the production of disinfectant and possibly also

the flow through the electrolysis cell in the case of inline electrolysis. To reduce these effects, the electrolysis cells

can function with polarity reversal, automatic/semi-automatic acid washing systems or alternatively, the water

supply can be (softened) treated appropriately.

Sufficiently resistant materials shall be used for all parts of the systems and devices that come into

contact with the chemicals and their solutions that are utilised and generated.
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The electrochlorination system should be assembled and installed in accordance with the

manufacturer's instructions and in compliance with the requirements of the applicable standards and

regulations – e.g., electrical.
6.2 Control unit

The control unit can be built into or independent of the electrochlorination device.

The control unit integrates the components that control the cell power supply and therefore the

production of disinfectant. The control unit shall deliver a Safety Extra-Low Voltage (SELV) supply as

defined in the Low Voltage Directive.

Where the control unit is not included in the device, it shall bear a manufacturer's plate indicating the

data, required according to the Low Voltage Directive, in particular:
— the identification of the distributor (commercial name or logo, etc.),
— the power supply voltage in Volt,
— the frequency in Hertz,
— the power input in Watt
— the current in Ampere,
— the protection index (IP),
— and the insulation class if necessary.
The control unit shall be installed in accordance with:
— the information indicated on this plate;
— the manufacturer's requirements and recommendations;
— the standards and regulations in effect.
6.3 Optional items
6.3.1 Flow detector

This component informs the electrochlorination system of an adequate flow, required for the

electrolysis process. This flow can be used to control or shut down the chlorine production.

6.3.2 System for dissipating stray electrical currents

This system enables the safe dissipation of stray currents of all origins present.

6.3.3 Production adjustment feature

This feature allows the level of production of disinfectant and oxidizing agent chlorine by the

electrochlorination system to be adjusted according to one or more predetermined parameters set by

the manufacturer (operating time, production power, etc.) independently of the actual needs of the

application or depending on external signals, such as redox measurement, chlorine level measurement

by amperometric sensors or photocolorimetry, etc.
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6.3.4 Temperature probe

This probe measures the water temperature and displays it on the control unit. Examples of use:

production temperature monitoring, protection of the cell, help estimate the salt level, display the water

temperature, etc.
6.3.5 Conductivity / TDS probe

This component serves to determine the concentration of the sodium chloride solution fed into the

electrolysis cell.
6.3.6 Buffer Tank
Systems with a buffer tank can be sized with lower nominal capacity in orde
...