I have a Vokera Linea 28 Combi boiler. It has been loosing pressure on the heating system for a while, and I think I have isolated it to the bypass valve located between the flow and return pipework. This is an external valve located below the floor. I am looking to replace it, but I have noticed that it is currently set partly open. How do I know how to set the new valve position?....or should it be closed?
Also, what is its purpose, as if even partially open it must allow flows to re-circulate directly back into the boiler?
Thanks in advace.
Also, what is its purpose, as if even partially open it must allow flows to re-circulate directly back into the boiler?
Thanks in advace.