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Mend Ferroli Modena 80 E Central Heating Pressure Expansion Tank

How do I drop the pressure from 4 bar on a Ferroli Modena 80 E?

When central heating is on, the pressure bar rises from 1 bar to 4 bar and water starts dripping from the expansion tank. I have removed air from everwhere yet the pressure does not drop, and water continues to drip from the expansion tank. How do i reduce the pressure? Help me please!

Ali Dawood
December 2007
FerroliFerroli Modena 80 EHeating, Home Heating SystemsCentral Heating Pressure Expansion Tank
Pressure should never reach 4 bar. Pressure relief valve should lift around 3 bar. Can only assume that bar gauge is out of calibration. Pressure rise would indicate expanssion vessel requires replacement.

D.R.
December 2007

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Find out how to mend Ferroli Modena 80 E home heating systems