Post
by DONFRAMAC »
Fri Nov 23, 2007 12:07 am
New boilers are usually combi's, and they need at least 0.5 bar system pressure when idling, and run at 1.5 bar on average when on duty. (1 to 2.5 bar is Ok)
My boiler has a detachable filling loop (braided hose), which fits below the wall-mounted unit, and allows top-up with mains water.
Excess pressure causes blow-off at 3 bar, and shows a fault code which needs to be reset, as would a low pressure fault code, after fixing the error. Then you set the duty selector to your desired position.