HOW MUCH AIR TO PUT IN EXPANSION VESSEL? POWERMAX BOILER?
I have a Powermax 155 Combi which loses pressure a lot. Ive heard that if you pump up the expansion vessel then this might stop the loss - but how much air do I put in?
Before you do that check for water in ex vessel tyre valve if you have then get a new one.
daz71, November 2008
Doubt if its the ex vessel. But if you really want to, use a tyre pump. pressure approx 0.5-1 bar. make sure you have depressurized ch system first and leave drain cock open to allow the water to escape when pressurizing vessel.
