How to repressure a Saunier Duval SD623 Combi Boiler?

There will be a 'filling loop' below the boiler (it will probbly be a stainless steel braided pipe). This spans between the cold water supply from the house, and one of the pipes that is part of the heating circuit.

There should be a valve on this loop. either a hand turn one, or one with a screw slot in the side. turn to open, yo will hear the sound of rushing water (rushing into the heating circuit and thus pressurising the system). do this until the pressure reads 1bar, close valve to stop pressurising, and enjoy.

tom e
January 2011