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How do I fix the increase in pressure for alpha 240 echo?

the pressure has increased over 3.5 bars and the water started leaking from the boiler, what is the cause of pressure increase and how to decrease it?

Mohsen Sawaf
November 2009
AlphaAlpha 240 EchoHeating, Home Heating SystemsAlpha 240 Water
btw to decrease the pressure there is a valve that u turn usually red to dump pressure or u can drain a rad and refill it dont forget to turn off the valves on rad while u drain it both ends

sean
November 2009
2 possible reasons either the filling loop is not closed properly or if the boiler is on and the pressure goes up then the expansion vessel needs replenishing

sean
November 2009

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