Greenstar HE+ - Automatic Air Vent Open?

Question

Hello all wise and knowledgeable ones (and all others too ;o)

Yet another question regarding Worcester-Bosch Greenstar Boilers. I've been reading through the installers guides for my new boiler (HE 40+) and creating a check list of tasks to be done whilst installing it. One of parts in the commissioning section is "Check automatic air vent is open" As far as I can tell, opening the automatic air vent is achieved by removal the little plastic screw from its home, is this correct? Also, if the plastic screw is to be removed during commissioning, does it need to be replaced at a future point, and if not, should it be kept in a safe place anyway?

Thanks once again for any and all answers.

Seri

John · Accepted Answer

I have a much older boiler - the auto vent started to leak so I was pleasedI had saved the screw cap. The replacement valve also leaked after a shorttime. I think my third valve is okay.Moral - keep the cap and look at the valve from time to time. When it needsto vent it will be crappy scummy water that eventually signals that the airis all out - this can play havoc with the valve.

IMM · Answer

Yes.Yes.Just loosen it.Leave the cap off for the first month after filling.  Then once the systemhas settled and air is out, screw it back up.

Christian McArdle · Answer

Don't take it all the way off, just enough so that it starts hissing. After2 or 3 days, tighten it back up so it doesn't decide to jam open and emptyyour expansion vessel over the floor.Christian.

Greenstar HE+ - Automatic Air Vent Open?

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