I just bled my radiators, and after I bled them, the boiler pressure was about 10psi, so I added a bit of water to the system to get it up to 15psi.
Since then, the pressure has gone up to 30psi and activated the release valve. A number of times I have opened the bleed valve on a radiator and let out water until the pressure decreased back to 15psi, but the boiler pressure keeps going back up to 30 and releasing hot water. What do I need to do get the system to stay at optimal pressure? Note that we haven't had the heat on consistantly: it has been off much of the time I have been monkeying with the system.
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