DaveŁ wrote:
I guess the solution is (a) to switch back to a smaller rad, or (b) to
fit a larger expansion vessel. Do you agree?
How about (c) fit an additional expansion vessel?
Assuming your current one is working fine and has not lost air pressure,
it sounds like the volume of water in your system with the bigger rad is
too great for the size of vessel built into the boiler. The simple
solution would be to fit another one somewhere else on the system. They
are not that expensive as a stand alone item.
--
Cheers,
John.
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