i want to check my auto air vent on my ravenheat csi 85t can someone please tell me what to do to check the right pressure and what to expect , as when the boiler gets up to 2.5bar it lets water out the pressure release valve

STEVE, March 2011

either clean or replace pressure relief valve once they have blown dirt stops them reseating it's a fairly simple job to do on this boiler

brian, March 2011

had the pressure at 1bar at 7pm tonight, got back at 11pm no pressure and water has COME out of the release valve, any ideas.nothing was on at this time.

STEVE, March 2011

Auto air vent on the boiler, will get rid of air, IN THE BOILER. 2.5 is high. What is the pressure cold, NO heating, NO hot water NO nothing. Should be about 1 If radiators not gettin hot, get a bleed key, and bleed the air from the radiators, IF you have been increasing the pressure to get the air to come out, IT IS possible that you have damaged some components, IN the boiler. If above is what you have done. DO NOT lower the pressure by manually opening the release valve, IT will damage it, YOU will have to part drain your system. should be a drain valve on it somewhere. With cold system, No heating NO hot water NO nothing. pressure should be about 1, bleed radiators until water comes out of bleed hole, keep topping up the pressure, if you have a lot of air. While it is still cold. once all radiators have no air, check that pressure is 1. THEN you can think about trying yuor boiler. IGNORE the boiler auto air, just leave slightly loose.
IF you are lucky, all ok. BUT I would say GET someone to check it out

Sheepdog, March 2011

Nothing wrong with the auto air vent, if your boiler pressure is getting up to 2.5 bar then there is a problem elsewhere, most likely the pressure vessel has lost its charge.

boiler bill, March 2011