Air in system?

[teaselweasel]

Hello,

I have a Worcester Danesmoor oil heating system and I am having to bleed the rads constantly i.e. every month, and sometimes the radiators make gurgling noises not all the time though. Someone suggested that more water needs to be put into the system but where do I put the water?

Any help would be most appreciated!

 

[gasandoilman]

Depends if the boiler has been sealed or weather you have a f.e. tank in the loft?
Where is your heating pump on the flow or return?
Do you have fully pumped or gravity dhw?