worcestor 9.24rsf combi

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worcestor 9.24rsf combi
31 December 2008, 4:12 PM

trev
Joined 31 Dec 2008
1 posts

I am losing pressure on the front panel gauge, down to zero when c/h is off. C/H still works, i.e. rads get hot. I know quite a bit about this combi, diverter valve probs etc and that the Domestic Hot Water operates seperately. I have removed front cover and noticed that the expansion vessel is leaking (if i re-pressurise the vessel up to 1 bar it leaks more, obviously air and water, so it will not hold the required 1bar) Iam going to replace vessel:- am i correct in this proceedure... 1 Turn off c/h supply inlet & outlet valves 2 Drain heat exhanger tank 3 Remove supply pipe from vessel 4 Undo strap which wraps round vessel 5 Remove Vessel. Re-fit in reverse. Do i then 1st pressurise vessel to 1 bar, turn inlet & outlet valves back on, then refill to 1.5 with cold supply to set front gauge...ANY THOUGHTS... many thanks Trev

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