04-03-2016, 12:02 PM
(04-03-2016, 11:46 AM)ppppenguin Wrote: I pressurise my system to 1 bar when cold. It goes up to about 2 bar when hot. The overpressure valve should open at about 3 bar.
Mine hardly changes from hot to cold. Perhaps a quarter of a bar at most.
With my previous system - also sealed - the only time I got big hot/cold swings was when the diaphragm in the expansion vessel failed.
I wonder if the expansion vessel needs to be re-pressured?
