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Mend Ferroli Optimax HE 31 S Boiler Home Heating

Does anyone know how to pressurise a Ferroli Optimax HE 31 S?

My Optimax HE 31 S has lost all pressure. I believe it has an integral filling loop !? I certainly cannot see any valves to open. Only a few months old,but I was never shown how to use it.

Mark
February 2009

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