Bleed radiators on system with Gledhill Boilermate A class

[sunset_sunday]

Hi, Total newbie here, but here's my situation: Moved into this house at end of May and had to change 2 radiators to fit furniture layouts. These 2 new radiators were fitted, but I didn't bleed them at them time, mainly because I wasn't sure how to top up the system pressure when the bleeding was complete. Managed without actually bleeding them up 'til now, but now the weather's been a bit colder, going to need them working very soon. Can anyone advise me how to top up the system pressure once I've bled these radiators, or do I even have to? Is is done automatically, etc? Any help would be greatly appreciated. Thanks, A

 

[REDSAW]

what heating system is it, are automatic bleed nips on the rads?.

 

[allwright]

small feed and exspansion tank on top of the a class. turn on iso valve on cold pipe that feeds it. do this when system is off.

 

[sunset_sunday]

Hi, it's not auto bleed nips on rads, and iso valve for expansion tank on top of the a class seems to be already at least half open- is this right? Thanks, A