11
LOSS OF SYSTEM WATER PRESSURE
The pressure gauge (G) indicates the central heating system pressure. If the pressure is seen to fall below the original installation
pressure of 1.0 & 1.5 bar then conduct the re-pressurising procedure as shown below. If unable to do so or if the pressure continues
to drop a Gas Safe Registered Engineer or in IE a Registered Gas Installer (RGII) should be consulted.
THE BOILER WILL NOT OPERATE IF THE PRESSURE HAS REDUCED TO LESS THAN 0.5 BAR UNDER THIS CONDITION.
In this case the following display will appear:
To Top up the system :-
1. Ensure both A & B handles (blue) are in closed position
(as shown).
2. Remove the plug and cap and retain.
3.
Connect the filling loop to the Domestic Hot Water (DHW)
inlet and tighten. Also ensure that the other end of filling
loop is hand tight.
4. Turn the Domestic Hot Water (DHW) Inlet A blue handle
to the horizontal position.
5. Ensuring no leaks are seen, gradually turn the filling loop
handle (blue) B to the horizontal position.
6. Wait for the pressure gauge to reach 1 to 1.5 bar.
7. Once pressure is reached turn valves A & B back to the
closed position.
8. Disconnect the filling loop, replace cap and plug. Note
there can be some water spillage at this point.
