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GUIDELINES FOR THE CORRECT TREATMENT OF WATER IN HEATING SYSTEMS (UNI 8065:2019)
NEW SYSTEMS
The idea that a new hydro-thermo-sanitary system is "clean" is profoundly incorrect. Inside the systems there are oils, welding fluxes and chips which can cause many problems during the life of the system. Oils and greases form insulating films that prevent the formation of protective oxides on metals and prevent corrosion inhibitors from carrying out their task. Chips can not only block the control parts (valve openings) and moving parts (circulator impellers) but can also be the cause of localized corrosion, even very serious ones. Soldering fluxes, being rich in salts, represent very widespread sources of corrosion.
For this reason, it is essential to always carefully wash even new systems.
Good washing should always be done using external recirculation pumps. Boiler circulators, in addition to not having the hydraulic characteristics necessary to provide sufficient mechanical force to perform a good wash, could suffer irreversible damage caused by chips and foreign bodies.
Washing of new systems must be carried out with AZ® 200 universal cleaner.
After circulating AZ® 200 for a sufficient and necessary time, drain the solution and rinse the system until all traces of dirt and cleaning solution are completely removed.
After having rinsed the system thoroughly, it is necessary to protect it using AZ® 100 universal protector.
It is always advisable to keep the protection level of the AZ® 100 product monitored throughout the year, using the specific analysis kit. If the level of protection is insufficient, it will be necessary to top up the missing product.
OLD SYSTEMS
When a heating system has remained in service for a long time, various substances can form inside it which can alter or even completely compromise its functioning.
Depending on the type of heating system, time and operating conditions, there are many foreign materials that can form.
In radiator heating systems, the formation of sludge and iron oxides can lead to total or partial obstruction of the radiators, causing partialisation. In the case of low-temperature systems, however, it is the micro-organisms that lead to the formation of mucilage which blocks the passageways of the pipes.
In all these cases it is necessary to use specific cleaning products. The chemical action of the detergent is generally insufficient to ensure adequate cleaning unless it is accompanied by an intense mechanical action offered by the BravoEVOLUTION PLUS external recirculation pump. It is also often necessary to concentrate the entire treatment flow rate on a single ring of the system.
Washing of old systems, radiator systems and low temperature systems, must be carried out with AZ® 200. The product must be kept in circulation for a sufficient time to guarantee the desired result.
After completing the cleaning, it is necessary to perform a thorough rinse until you obtain clean water free of foreign bodies and without detergent solution.
It is very important not to clean old systems with the boiler circulator; during washing operations it would be advisable to completely exclude the circulator (by-passing it or removing it temporarily).
After having rinsed the system thoroughly, it is necessary to protect it using AZ® 100 universal protector.
It is always advisable to keep the protection level of the AZ® 100 product monitored throughout the year, using the specific analysis kit. If the level of protection is insufficient, it will be necessary to top up the missing product.
AZ® WATER ANALYSIS
As required by the UNI 8065:2019 regulation, it is mandatory to carry out annual checks on the chemical characteristics of technical water.
Acqua Brevetti offers its customers the ACQUA AZ® ANALYSIS service.
Form downloadable from our website in the Products area - Heating system air conditioning.
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