air problem with Worcester life 8000 regular

[TTGASSERVICES]

Has anyone had any experience with the drain off/bleed valve on the primary return ,adjacent too main heat exchanger on Worcester life 8000 (45kw) regular ?

I want too replace the 3/8 threaded drain off /bleed valve with a AAV ,has anymore does this?

large system 28 rads 3 floors ,sealed system

thanks

 

[ShaunCorbs]

Why are you having air problems?