I am having on-going issues with loss of pressure in our unvented system in our new build house and am after some advice so I can have a sensible conversation with the heating engineer.
Set-up as follows:
Potterton Promax HE
Twin zones CH (Zone 1 = bottom floor and Zone = top two floors) via Siemens controls
Range HE cylinder and two expansion vessels in the airing cupboard.
Pressure has been dropping on CH and I have had to bleed rads and refill the system on at least four occasions in as many months. No visible leaks in system.
Heating engineer suggested placing tissue in tundish to see if water escaping from the CH expansion vessel which has been confirmed. New CH expansion vessel fitted; system repressurised and all working. Well, it is but there is still water dripping onto the tissue and the pressure is falling again. Takes about three days to go from cold 1.5 bar to almost 0.
Any suggestions why this is still occurring?
Set-up as follows:
Potterton Promax HE
Twin zones CH (Zone 1 = bottom floor and Zone = top two floors) via Siemens controls
Range HE cylinder and two expansion vessels in the airing cupboard.
Pressure has been dropping on CH and I have had to bleed rads and refill the system on at least four occasions in as many months. No visible leaks in system.
Heating engineer suggested placing tissue in tundish to see if water escaping from the CH expansion vessel which has been confirmed. New CH expansion vessel fitted; system repressurised and all working. Well, it is but there is still water dripping onto the tissue and the pressure is falling again. Takes about three days to go from cold 1.5 bar to almost 0.
Any suggestions why this is still occurring?