I have a trianco eurostar oil fired combi boiler fitted with an expansion vessel. All seems normal and operating fine, however every few days I find the system gets noisy on start up with air collecting in the radiators. How can this be if the system is pressurised to 1.5 bar and I can find no signs of water leakage from the system. Surely air can only be drawn in if I have a leak. If system pressure remains over a bar at all times if there is a leak it will be water leaking out not air drawn in. Please advise how does the air get into the system?
Where is the air in the radiators coming from?
- Thread starter graeme55
- Start date
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If your system is old and/or uninhibited, and also depending on your water type, you could have corrosion going on. Corrosion produces hydrogen which then collects in the rads. You could check it by lighting it but I wouldn't!
Best thing to do would be to drain down, flush with a cleaner for 2/3 weeks and then refill with a good inhibitor.
Best thing to do would be to drain down, flush with a cleaner for 2/3 weeks and then refill with a good inhibitor.
That sounds like good advice, can you advise as to what product to use.
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I may be an experienced marine engineer but when it comes to servicing domestic boilers and fitting a digital programmer unit I would rather employ someone who has the necessasy test kit and does this sort of work for a living. The flushing of the system should be quite straight forward but would like the whole job done as a oner. Once again thanks for the advice and a Merry Christmas.
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