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- 15 Feb 2009
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hi, yeah my dad had an ariston 27 Bffi combi fitted in his house maybe 4 or 5 years back. in the past 18 months they have had problems with the pressure relief valve getting jammed open and constantly discharging hot water outside, they have been through 2 domestic hot water expansion vessels ...
...when the room stat is turned up, the boiler fires up, the pump runs, but then it will all shut down... then maybe 1 minute later it will do exactly the same... this will happen all day long until the room stat is turned off again. because of this, it will take a good few hours to get most of the rads upto temperature...
there is 15mm pipework fitted ch flow and return, should this be changed to 22mm, it´s an 11 rad system...
...when the room stat is turned up, the boiler fires up, the pump runs, but then it will all shut down... then maybe 1 minute later it will do exactly the same... this will happen all day long until the room stat is turned off again. because of this, it will take a good few hours to get most of the rads upto temperature...
there is 15mm pipework fitted ch flow and return, should this be changed to 22mm, it´s an 11 rad system...
