no pressure in vokera boiler

[tu_pence]

I need to add pressure to my vokera boiler - Linea 28
it is used with gas and is a combi boiler

I have done this before but i forget. I know how and where to pump air into it but should i drain it first and then turn valve to add water??

i bleed a radiator tonight and the only thing that came out was air i think that this caused the problem.

the boiler had been sitting at a low pressure anyway - 0.5

please help as boiler on blink

 

[denso13]

......turn valve to add water

Put pressure up to 1 bar through the filling loop, if you know how to do that, and see if it works.