Potterton Combi 80 - Pressure?

possible fill loop leaking into system

grahame
December 2007

The reason the pressure is increasing is the expansion vessel located at the back of the boiler is de pressurised.

Release all pressure in the heating system using your drain valve. Lean over the top of the boiler and you will see a red vessel with a valve just like the one on your car. Pump up with a foot pump tp 1 bar or 14lbs pressure. re pressurise your heating with the filling loop Problem solved

John Russell
December 2007