Treatment product suppliers Why should you use this standard? It supplies recommendations on best practice for the preparation of the circulating water in open vented or sealed heating and cooling systems in individual domestic premises during initial commissioning or re-commissioning following major remedial work, e. It also recommends the ongoing water treatment to ensure appliance and system protection and continued efficiency in operation. The standard ensure awareness of potential problems and of remedies which maintain efficiency and maximize the life of heating and cooling systems.
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Here, Francine Wickham, Global Marketing Director at Fernox takes a look at the revised code of practice and explores the latest product innovations available, to make it easy for installers to comply. Fernox supports the new legislation through its Research and Development programme, as the company recognises the crucial role product innovation and application must play in encouraging the wide-spread adoption of new practices and processes — where ease of use and reliable product performance is key.
The latest code of practice covers five key areas — clean, guard, protect, maintain and test — to not only ensure compliance but to also ensure systems are performing at their optimum level. Clean Before an existing central heating system is dosed with chemical water treatment or a filter is installed, it is vital that it is cleaned to remove any existing sludge or debris build-up.
For best results, installers should use a recognised cleaning method such as powerflushing, mains pressure or gravity cleaning. It is also important that systems are cleaned before the boiler is installed or when a new boiler has been isolated from the rest of the system. This will prevent any existing sludge or debris within the system reaching and depositing in the boiler and causing lasting damage. Guard Once a central heating system is cleaned, it is key to make sure that sludge and debris does not build-up once more.
The new BS code of practice states that, in order to do this, an in-line filter should be permanently installed to provide continued protection and maintain system efficiency. It is important that the chosen filter can effectively capture and contain both magnetic and non-magnetic debris to keep the system as clean as possible.
Filters manufactured by leading water treatment specialists, that utilise a powerful neodymium magnet and other technology such as Hydronic Particle Separation HPS are better able to achieve this — and can therefore deliver optimum results. Protect To protect a central heating system from corrosion, scale, microbial fouling for low temperature heating systems, installers should dose the system with the correct quantity of chemical water treatment products.
This should include Protectors to protect against harmful sludge and debris build-up. It is best to choose products from a reputable manufacturer, to guarantee that the chemicals will continue to protect the system effectively.
For low temperature or underfloor heating circuits, which are at risk from bacterial contamination and fungus, specialist biocides are available. Fernox Biocide F7, for example, protects against bacterial slimes, algae and biofilms forming, which can cause blockages, inefficiencies and ultimately breakdowns. System Filters can directly protect the boiler to ensure that any circulating debris that is present within the system does not reach vulnerable components such as pumps or heat exchangers.
For hard water areas with a ppm of and above, a scale reducer should be fitted to mitigate the effects of limescale. Electrolytic Scale Reducers offer whole house protection whilst Magnetic Scale reducers are designed to be fitted next to the boiler for single appliance protection. This will ensure that the filter continues to work at its best, removing contaminants from the system.
Fernox TF1 Sigma and TF1 Omega filters are great examples of innovative, non-lidded filters that enable fast, mess-free maintenance and cleaning.
Time on site cleaning the system is reduced and there are no ongoing servicing costs. These sealed, lid-less filters can be cleaned simply by turning off the system, opening the drain valve and removing the magnet from the sheath — dirt will then flow out, cleaning the filter without the installer having to touch or clean a dirty magnet.
Test To ensure full system protection, inhibitor levels should be checked throughout its life cycle. This can be achieved with a full laboratory analysis of the system water.
Simple test kits are available — these require a sample of the water to be taken and sent off to a laboratory for testing. Results can then be accessed easily through apps such as the Fernox Water Quality Test App, which provide all test results in a clear, easy to access format with regular status updates. In order to meet the requirements of BS , it is vital that installers look to specialist manufacturers who demonstrate an understanding of the on-site challenges, with an extensive product portfolio that offers a solution for every application — and ensures compliance on every project.
Excellent 4. A revised British Standard has been introduced concerning the preparation, commissioning and maintenance of domestic heating and cooling water systems: BS This new standard replaces BS which has been withdrawn with immediate effect. Installers will need to be aware of the following standards when it comes to the new British Standard: An in-line filter needs to be fitted to every system Carry out a chemical clean and fresh water flush before fitting the inhibitor Cleaning methodologies can be improved with external magnetite capture equipment and mechanical vibration of radiators Annual water test to test level of inhibitor and system cleanliness Every 5 years, the inhibitor should be re-dosed or a full system water test carried out Includes closed loop heating and cooling circuits Biocide is essential in cooling and low temperature heating systems Consider biocide for higher temperature systems The new standards have been welcomed by ADEY as it should not only improve boiler protection but the health of the entire system too. This represents massive potential to contribute to the reduction of carbon emissions.
BS 7593:2019 – WHAT YOU NEED TO KNOW…