How do you increase the pressure on Potterton Puma 80 Boiler?

Thanks for your help Charlie but there doesnt seem to be a black tap or any other sort of tap apart from the Blue and Red for the flow and return of the central heating!
However i think i have found the main water inlet and tried turning the valves to open them!
The water pressure however has not increased. Should there be any sort of process i should use to increase it like having the water running or the hot water/ central heating on?
Hopefully i can get this running properly before it gets even colder here!
Thanks
Richard

Richard James
December 2008

I have the same boiler. On one of the pipes below the boiler there should be a small black tap. Opening this lets water flow into the central heating system from the mains water, increasing the pressure (you'll see the guage go up as you open it). After topping up you might find the pressure goes down a little again, so just top up a bit more until it stays at 1 bar. Hope this helps.

charlie
December 2008