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vaillant ecotec 24

R

rockinter

Joined
23 Sep 2009
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Location
Oxford
Country
United Kingdom
Hi,
I read in the manual of the vaillant boiler has A.A.V (automatic air vent) cap on the pump which should loosened when commissioning it. So i guessing this should stay loosened all the time?
So if there is any air in the sealed system it will take it out?
 

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