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Hello,
I am hoping to gain some advice following encountering several issues which I'm struggling to determine the magnitude of in my central heating system. I had 8 new cast iron radiators installed in December and since then my Vokera 28 Compact boiler has been dropping pressure on a regular basis.
I am hoping to gain some advice following encountering several issues which I'm struggling to determine the magnitude of in my central heating system. I had 8 new cast iron radiators installed in December and since then my Vokera 28 Compact boiler has been dropping pressure on a regular basis.
- The boiler drops pressure of around 0.5 to 1 bar every 24 hours since the radiators were installed. It is normally pretty stable when the heating is on but will fall considerably during the night when off.
- The pressure gauge on the boiler takes a while to register when being refilled. When being filled initially the gauge will not move, then a few minutes later it will rise to a stable reading so it's very difficult to know how much to fill but this was the case even before the cast iron fittings.
- There is some very slight weeping from a bush end at where the brass bleed nipple is on the radiator. I noticed it earlier and it was just a bubble of water that I could blow off.
- My installer fitted 3 of the 8 radiators TRVs on the return side rather than the flow. The TRVs are Bentley traditional style that are bidirectional but the manufacturer recommends that they are fitted on the flow.
- The total water content of my new radiators is 90 litres and I have 2 double convector radiators (600*600, and 1200*600), and 3 bathroom towel rails so bringing the total litres in the system above the maximum 78 litres listed in the installation book of the boiler.