couple of questions

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My combi,worcester28siII,is situated in my loft hence all pipework and rads are below it,a couple of questions here for my piece of mind.
!. can I still run the c/h with one of my rads disconnected from the system.
2. If I drain the the system do I just bleed the pump and the rads when ready to start up the c/heating.
3. Will I need to do anything to the Expansion vessel,which according to the service manual is pressurisedat 0.5 bar.
regards
 
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thanks Kevplumb,Can you explain the provedure with the aav control. cheers.
 
ensure the plastic srcrew on top the the aav is loostened. It should be anyway but they have a habit of leaking so plumbers tighten them up. It must be open to allow your boiler to vent.
 
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ensure the plastic screw on top the the aav is loostened. It should be anyway but they have a habit of leaking so plumbers tighten them up. It must be open to allow your boiler to vent.
 
thanks soggy ,so what your saying is that the aav works automatically and apart from it being loose it should be left alone.
regards
 

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