S
sapphire
Hi Everyone
I am new here! I hope I can get some help with a problem that I have had with my sealed system since it was installed in October 2011. I am in London SW8 and have a problem with my heating system that I have been unable to solve.
I have 2x Heatrae Sadia MEGAFLO 145litre cylinders which are indirectly heated by a Vaillant 428kw open vent boiler.Even though these were installed in October 2011 and I am still bleeding air from the system and there don't appear to be any leaks at all.
The cylinders are located in the cellar and I have 2 manual air vents in the main bathroom at the highest point of the circuit that is used to heat the water and the heating system which runs from the boiler and into the coils at the cylinders. There are motorised valves which open up to heat the radiator heating circuit radiators when heating is demanded.
It seems that no matter how much I try, I can’t get the air to leave the system. If I bleed it manually via one of the manual bleed valves, I can come back in a day and do it all again. The pressure seems to remain at 1.2 bar on the heating system no matter what I do. I am sure there is no leak at all as the pressure doesn't drop even after years, so somehow air is entering my system.
I also get air in the highest towel radiator on the top floor, which I bleed. I am thinking that as I will shut down the radiators soon, the motorised valves will only work for hot water and not the heating and so the radiators should not fill with any air.
I have thought that perhaps my expansion vessel is inadequate as I have 14 radiators currently connected to this expansion vessel. Or, perhaps the expansion vessel is faulty? I have attached pictures of the setup in the cellar and the flow/return pipes that head to the boiler. The heating water is pumped by the red Grunfos pump which has been fitted to the return of the heating system water.
The flow/return pipes do have a fair distance to travel to reach the boiler from the cylinder. They go up 1 storey and travel under the bathroom floor and then down through the kitchen ceiling directly into the boiler.
Does anyone have any ideas on what I can do? At the last service, the system was drained and more inhibitor was added (I thought that perhaps my system was low and corroding). Can I test the expansion vessel or does it seem that the problem is elsewhere?
I hope you all can help?!:yesnod:
I am new here! I hope I can get some help with a problem that I have had with my sealed system since it was installed in October 2011. I am in London SW8 and have a problem with my heating system that I have been unable to solve.
I have 2x Heatrae Sadia MEGAFLO 145litre cylinders which are indirectly heated by a Vaillant 428kw open vent boiler.Even though these were installed in October 2011 and I am still bleeding air from the system and there don't appear to be any leaks at all.
The cylinders are located in the cellar and I have 2 manual air vents in the main bathroom at the highest point of the circuit that is used to heat the water and the heating system which runs from the boiler and into the coils at the cylinders. There are motorised valves which open up to heat the radiator heating circuit radiators when heating is demanded.
It seems that no matter how much I try, I can’t get the air to leave the system. If I bleed it manually via one of the manual bleed valves, I can come back in a day and do it all again. The pressure seems to remain at 1.2 bar on the heating system no matter what I do. I am sure there is no leak at all as the pressure doesn't drop even after years, so somehow air is entering my system.
I also get air in the highest towel radiator on the top floor, which I bleed. I am thinking that as I will shut down the radiators soon, the motorised valves will only work for hot water and not the heating and so the radiators should not fill with any air.
I have thought that perhaps my expansion vessel is inadequate as I have 14 radiators currently connected to this expansion vessel. Or, perhaps the expansion vessel is faulty? I have attached pictures of the setup in the cellar and the flow/return pipes that head to the boiler. The heating water is pumped by the red Grunfos pump which has been fitted to the return of the heating system water.
The flow/return pipes do have a fair distance to travel to reach the boiler from the cylinder. They go up 1 storey and travel under the bathroom floor and then down through the kitchen ceiling directly into the boiler.
Does anyone have any ideas on what I can do? At the last service, the system was drained and more inhibitor was added (I thought that perhaps my system was low and corroding). Can I test the expansion vessel or does it seem that the problem is elsewhere?
I hope you all can help?!:yesnod:
