Air in a sealed system - how to remove it?

[mth]

Hi

I've recently had central heating installed in my house. I have an external combi and the heating feed comes into the the house and up to the 1st floor. I can run my central heating for about 10mins when cold with no noise, but once it warms up I get a series of bubbles - it sounds quite a lot - coming up into the first radiator.

The problem is that the air doesn't stay in the radiator and it doesn't get vented out of the AAV on the boiler either.

There is a manual vent on the boiler at the opposite site to the AAV and this lets air out each time I vent it when it's cold/been sat for a while. But not much air comes out.

The air does seem to be reducing as I vent, but it's taking me weeks!

Is there anything else I can do? Do I need to add another AAV inside the house so when the air bubbles up it will get vented?

I'm having a loft conversion in the new year and will have to drain the system for the new rads to be added and I'm dreading having to start from scratch again and it taking another 2 months to sort out!

Thanks

 

[bengasman]

external boiler?? white?
recently?

 

[mth]

A Firebird External Combi (20kw version). Green. A couple of weeks ago.

 

[bengasman]

don't know a lot about oil but if you meant you had the whole installation including the rads done a few weeks ago, get the installer to sort it out.
the moment you do something yourself, he can say you interfered with his work