@AGAS take your point, but I've txt'd the installer before I started this thread, not had a response yet!
I don't think the parameters that I'm talking about are in the diagnostic side, I believe they are in the default operating parameters of the boiler.
Why do Glow worm make it so difficult to change the CHW temperature? Every other boiler I've had or seen over the years always had a front panel adjustment.
Richard
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