Loss of system water pressure
indicates the central heating system pressure.
If the pressure is seen to fall below the original installation
pressure of 1-2 bar over a period of time then a water leak may
be indicated. In this event conduct the re-pressurising procedure
as shown below. If unable to do so or if the pressure continues to
drop it’s time to call in a qualified engineer
THE BOILER WILL not OPERATE if the pressure has reduced to 0.3 BAR or less.
Ensure filling loop isolation valves are closed. Turn the filling loop isolation valves to the open position. The system will now fill. Wait for pressure gauge to reach between 1 and 1.5 bar. Close the isolation valves.