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Ferroli F30 pressure problem, 1.5 to 3.0 bar & then 0bar

Discussion in 'Plumbing and Central Heating' started by Adrian777, 28 Nov 2005.

  1. Adrian777

    Adrian777

    Joined:
    28 Nov 2005
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    Location:
    West Midlands
    Country:
    United Kingdom
    hello - hope you can help,

    we have a Ferroli F30 boiler (14mths new) that normally shows 1.0 to 1.5 bar on the front-panel gauge when CH is cold. When CH is running this eventually increases to 3.0 bar when the pressure relief valve operates (read the manual!) and we see water dripping out of an "overflow" pipe from the boiler down into a drain we have in the garage. If the CH is turned off it slowly comes down to about 2.0 bar but continues dripping water into the drain. I think this has happened over the last few weeks as we have also increased the CH temp. up to about 70 deg.

    If the CH is off at midnight and the gauge is at 1.5 bar I check again at 7am the gauge shows 0 bar - I have to re-fill again from the top-up valve the engineer fitted. It seems like the whole lot has drained as when I use the top-up valve there's a hell of a lot of water that goes back into the system.

    Is there some type of blockage possibly in the CH that causes this? Would anyone have any more ideas please?

    What I am doing tonight is to lower the temp dial back to 51 degrees to see if it stops pressure increase (manual says not to go below 50 deg in winter).

    cheers,
    Adrian
     
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  3. annemarie

    annemarie

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    5 Sep 2005
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    Location:
    Cardiff
    Country:
    United Kingdom
    hi
    With my boiler the problem was no air in the expansion vessel. This seems to cause this problem.

    But yours may be different... I am definitely a novice:)
    AM
     
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