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Ferroli Optimax HE31c a26 problem?

I'm having A pressure issue. The system pressure will increase to over 2-3bar and shut off from a starting position of 1.2bar. If I start from a position of a half a bar then I can only set my temperature to around 50 degrees for the system to stay under 2bar and remain on????

Ron McDowell
December 2017
FerroliHeating, Home Heating SystemsFerroli Pressure Optimax

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Ferroli Optimax HE31c Pressure Issue - Help!