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comination boiler ferroli modena 102?

turn on central heating and pressure gauge will go to 4 bar and lift safety valve

martin gundersen
May 2008
FerroliHeating, Home Heating SystemsBoiler Modena 102
sounds like either you system is over pressurized (should be 1-1.5bar when cold) or your expansion vessel either needs charging or replacing

T
May 2008

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