Evening, I wonder if someone could give me some advice regarding my hot water system please.
I have an system condensing boiler attached to an unvented hot water cylinder to supply my hot water. I removed a towel rail on Friday which is fed by the hot water cylinder rather than central heating to allow plastering and painting. I managed to remove the towel rail without a problem, isolating it and draining it etc.
However since reconnecting the towel rail my boiler keeps cutting out on poor circulation after a few minutes and the pump attached to the cylinder sounds like it is struggling.
From what I have read, I have managed to introduce air into the system and it must be released. However from what I can see there is a small screw cap on top of a vertical pipe above the pump but when loosened only a tiny amount of air was released.
Is there anything critical I am missing here. I'll have to call a plumber otherwise. I cannot see the pressure that my boiler is operating at it but the expansion vessel from the cylinder is on 0 bar.
The boiler has no problem heating the radiators by the way but I believe that is a separate system.
I have an system condensing boiler attached to an unvented hot water cylinder to supply my hot water. I removed a towel rail on Friday which is fed by the hot water cylinder rather than central heating to allow plastering and painting. I managed to remove the towel rail without a problem, isolating it and draining it etc.
However since reconnecting the towel rail my boiler keeps cutting out on poor circulation after a few minutes and the pump attached to the cylinder sounds like it is struggling.
From what I have read, I have managed to introduce air into the system and it must be released. However from what I can see there is a small screw cap on top of a vertical pipe above the pump but when loosened only a tiny amount of air was released.
Is there anything critical I am missing here. I'll have to call a plumber otherwise. I cannot see the pressure that my boiler is operating at it but the expansion vessel from the cylinder is on 0 bar.
The boiler has no problem heating the radiators by the way but I believe that is a separate system.