By removing dirt and blockages in the pipework, you’ll extend the life of your central heating system and make sure it works more efficiently as it heats your home. The Problems Caused in the Heating Networks:
The problems in the networks of heating systems (radiators) caused by unsuitable water are: “magnetite sludge”, oxidation, salt deposits and beyond, freezing of water in areas with very low
temperatures, and the electrolysis phenomenon when dissimilar metals are in contact with each other. The hardness and pH of the tap water with which heating networks are usually filled are the main cause of the above problems. Tap water usually has a pH of between 6,5 and 7,5, which makes it corrosive. However, according to the EN14868 standard and the VDI2035, SWKI-97-1 & UNI-CTI 8065 regulations, in order to protect boilers from the above problems, the mains water must be alkaline, i.e. have pH values ranging from 8.2 to 9.5. In fact, large boiler manufacturers do not guarantee compensation for unusual damage if the heating network water is corrosive, i.e. does not have a pH of 8.2 – 9.5, as stipulated in the above standards and regulations. The Magnetite Mud & Oxidation:
In closed heating networks, the water of the network coming into contact with metallic elements of the heating system such as radiators, steel pipes, boiler etc., starts from the first moment of operation of the system to corrode them, resulting in the creation of iron oxides that are deposited on the pipes, on the metallic elements of the network. These deposits and accumulations are known as magnetite sludge: a ‘muddy’ black-coloured aggregate that contaminates the circuit water and is the ‘insidious enemy’ in any heating network. The Electrolysis Effect:
When dissimilar materials are in contact in a heating network (e.g. copper in contact with steel), the network water acts as an electrolyte, resulting in the phenomenon of electrolysis, which is one of the main causes of wear, punctures and leaks. High Corrosive – Unsaturated Waters:
In many areas where the water is unsaturated (low calcium carbonate – CaCO3 ) there is a high tendency for corrosion of the metal surfaces of the heating network, especially when the network is left inactive and at low temperatures. The most effective solution is to increase the pH to higher alkaline levels to address the problem and avoid situations such as pipe bursts and high levels of corrosion of metal parts of the network. Addressing the Above Problems:
As is the case with cars, heating systems (radiators) need to work properly and efficiently and to prevent unwanted and costly failures. Every 5-8 years the planned maintenance should be carried out with Power Flash and using the appropriate chemicals (Long life 800). Also in order to ensure permanent protection against these problems we must install the appropriate components at the correct points in the network and the appropriate chemical (Long life 100). Annual Maintenance of Heating Systems:
Simple steps for proper maintenance & cleaning of closed heating systems that: Improve performance & efficient operation throughout the year. Extend the life of the boiler & all system components. Reduce repair costs for damage , punctures, leaks caused by corrosion of salt deposits & magnetite sludge build-ups. They save energy & reduce fuel consumption.
