ferroli pressure really need help possible danger!

[NEILCMUSIC]

Hi I have a ferroli boiler which is situated in my childrens bedroom , it has been flowing from the prv for about the last week at a pressure of 3 bars. prv installed about 2 yrs ago. Last night it went up to 4 and was banging and "screaming to the point that it woke up the neighbours. I ran into the kids room and has to turn off the water at the mains and also the boiler , this morning it is again hovering at 3. I was just wondering if it was a problem with the loop because when I turned the water off the prv took it down to 1.5 and usually it goes straight back up to 3 after releasing pressure via prv. In theory if had mains water off all of the time the pressure would remain betwenn 1.5-2.5
Obviously mains water off all the time is not an option but shoud loop be filling up without me turning tap or is it faulty and letting water in , worried about childrens safety now , please reply if you have an ideas or solutions , thanks.

 

[Burnerman]

Make sure the filling loop is completely turned off, and ideally disconnected, if possible. If the PRV is blowing water out, then water must be coming in!
John

 

[NEILCMUSIC]

the filling loop tap has gone from horizontal (open) to vertical (closed) , I appreciate your quick response , please advise should filling loop let any water in at all when closed or is it only for topping up , thanks. If it shoudnt its def faulty as when prv tapped turned to release pressure it goes straight back up , however there is a def increase in flow of water when loop tap is turned.

 

[NEILCMUSIC]

just fixed this problem after years of ongoing speculation , including "trained" homeserve engineers replacing the prv , twice! As you look at filling loop tap horizontal is closed and vertical is open whilst turning it clockwise , HOWEVER!!!! as I have just discoverd if you turn it a fraction to far so its at 12:01 rather that 12:00 position it slightly opens it back up and therefore ................releases water into the bolier , problem solved at no cost at all , thanks.