I have a British Gas boiler, which I believe is actually made by Ideal, and is an RD2 450.
A while back I was having circulation problems and noticed that some of the rads were a bit gungy, so I drained down the system and refilled and drained with fresh water a couple of times, (concrete floors downstairs so all rads & boiler are at the bottom of loops, and each has a drain-off point).
Refilled the system with a cleaner and ran for 2 weeks, as instructed, then drained, and refilled with inhibitor.
However, whenever the system starts or stops now I am sure I can hear gurgling from within the boiler as if there is air trapped somewhere. I thought it would work it's way out, but it doesn't seem to have done so, although the water seems to circulate fine.
There was a drain tap fitted to the bottom of the boiler which I used when I was draining and cleaning the system, but as far as I can tell there is no 'bleed valve' or anything similar at the top.
Does anyone know of how to bleed these boilers, or if there is no way, how I can try and shift the trapped air? I have tried running the boiler and pump (set at it's highest speed) just going through the HWC as that is the shortest possible circuit, but it doesn't seem to want to shift
A while back I was having circulation problems and noticed that some of the rads were a bit gungy, so I drained down the system and refilled and drained with fresh water a couple of times, (concrete floors downstairs so all rads & boiler are at the bottom of loops, and each has a drain-off point).
Refilled the system with a cleaner and ran for 2 weeks, as instructed, then drained, and refilled with inhibitor.
However, whenever the system starts or stops now I am sure I can hear gurgling from within the boiler as if there is air trapped somewhere. I thought it would work it's way out, but it doesn't seem to have done so, although the water seems to circulate fine.
There was a drain tap fitted to the bottom of the boiler which I used when I was draining and cleaning the system, but as far as I can tell there is no 'bleed valve' or anything similar at the top.
Does anyone know of how to bleed these boilers, or if there is no way, how I can try and shift the trapped air? I have tried running the boiler and pump (set at it's highest speed) just going through the HWC as that is the shortest possible circuit, but it doesn't seem to want to shift