My CH system was converted to a closed system. The property is on 3 floors (including the loft) and the boiler, a conventional Worcester Bosch 24cbi, is in the kitchen on the ground floor. The PV, I think 8 or 12ltr can't say exactly as the label is behind and can't be seen (supplier said that unit supplied is 12ltr but looks smaller), added when the system was converted, is in the airing cupboard on the first floor.
I've been having problems with the pressure in the CH as I have to top up every few days. I've found a small leak at a drain off valve, it's quite small but I hope it's the reason for losing pressure. Although, when the system is refilled to bring it up to 1 bar, when the system runs it climbs to between 1.5 to just over 2 bar. After the system stops and cooled it drops back sometimes to below 1 bar. If not refilled it would gradually fall to zero and shut down the boiler.
I am going to have the leak fixed and at the same time thinking of replacing the PV with a larger one, maybe 18ltr, since the heating engineer thought the vessel might be a little too small for the size of installation - and having a larger one than needed is not going to harm the system.
My question is, a) is there an optimum place to site a pressure vessel and b) which way up should it be installed - the one in place at the moment has the attachment from the CH at the top.
I've been having problems with the pressure in the CH as I have to top up every few days. I've found a small leak at a drain off valve, it's quite small but I hope it's the reason for losing pressure. Although, when the system is refilled to bring it up to 1 bar, when the system runs it climbs to between 1.5 to just over 2 bar. After the system stops and cooled it drops back sometimes to below 1 bar. If not refilled it would gradually fall to zero and shut down the boiler.
I am going to have the leak fixed and at the same time thinking of replacing the PV with a larger one, maybe 18ltr, since the heating engineer thought the vessel might be a little too small for the size of installation - and having a larger one than needed is not going to harm the system.
My question is, a) is there an optimum place to site a pressure vessel and b) which way up should it be installed - the one in place at the moment has the attachment from the CH at the top.