If your customers are experiencing poor circulation in their homes, such as ineffective radiators, it could be caused by hydrogen in radiators and so it is important to accurately identify the cause of the issue in order to properly resolve it. This guide can help you to conduct checks which will lead to an accurate diagnosis of the circulation problem.
If you have identified the problem as being one of a mechanical nature, you can resolve the issue with an appropriate mechanical fix.
Issues with hydrogen in radiators and corrosion debris should be tackled using chemical cleaning. Before proceeding with a system clean, check that the feed and expansion cistern is clean and free from bacteriological or microbiological contaminations. If necessary, isolate, drain, clean and disinfect it.
You should select the appropriate cleaning chemical for the system and the issue in question – in this instance, Sentinel X400 System Restorer and X800 JetFlo Ultimate Cleaner are recommended – and commence cleaning, using a powerflushing device where possible, but only if it is appropriate for the system. Powerflushing is not suitable for systems which contain microbore or non-barrier plastic piping. If the system is new or less than six months old, X300 System Cleaner is the recommended cleaning product and a manual flush is the recommended cleaning method for this product.
If poor circulation as a result of debris such as sludge was the problem, the powerflushing should resolve the issue. The water should be examined for the presence of debris on a regular basis and if further fouling is discovered, the system should be flushed to drain and a further dose of Sentinel X400 System Restorer applied.
If hydrogen production was the issue, the cleaner ought to be circulated for a minimum of 24 hours. However, if the system is old or there is a great deal of debris accumulated; allow at least a week for the best effects.
If you have identified hydrogen sulphide in the system, the system should be disinfected with a suitable sanitiser, such as X700 Sanitiser & Biocide, prior to the final flush.
Once you have cleaned the system, you should treat it with a multi-metal corrosion and scale inhibitor such as Sentinel X100 Inhibitor. If the system is producing hydrogen gas, you may wish to add a double dose of inhibitor. As it takes time for active corrosion surfaces to become passivated, it takes time for hydrogen production to cease. For this reason, you should allow a minimum of 6 weeks before considering further action.
If this process has not restored satisfactory flow and there is no full blockage, it may be necessary to use a more forceful approach and a stronger product, such as Sentinel Deposit Remover. This chemical, designed specifically for the removal of stubborn iron oxide deposits, ought to be used in conjunction with a JetFlush, provided that powerflushing is suitable for the system.
Sentinel is a company with a clear goal: we offer water treatment products and services that provide the best lifetime protection for heating and hot water systems. Originally launched in the UK by Grace Dearborn in 1988 and subsequently a subsidiary of the leading multinational General Electric, Sentinel has operated independently since 2005, expanding its international reach and range of innovative solutions. As of 2021, Sentinel is owned by Aalberts N.V., and sits in the hydronic flow control cluster.