Water pressure sensor
This sensor control has following settings:
0.5 bar:
below this pressure the burner is blocked for operation
0.5 to 0.8 bar: boiler will reduce Tset max by 5°C
0.8 to 3.0 bar: boiler fully functional
3.0 bar:
above this pressure the boiler is blocked for operation
The pressure sensor is also used to set the boiler free before every start.
Before the burner is set free the boiler does a pump check, it checks for
an increase in pressure when the pump starts. If there is an increase of
water pressure, the boiler will fire up. If there is no increase the burner is
blocked.
Flow switch
(Regular boiler)
In the regular boiler there is no pump inside and because of the low pressure there is no pressure sensor inside as well.
To register if the system pump is working and there is water in the system there is a flow switch and this flow switch sets the burner free.
The iC, iC Economiser Plus & iS boilers are supplied with a pressure sensor.
If the water pressure drops below 0.8 bar the text "Warning 1P4 Filling Needed" will appear
in the screen;
Between 0.5 and 0.8 bar and the boiler will reduce Tset max by 5°C.
If the water pressure drops below 0.5 bar the text "Fault 108 Filling Needed, Restore the pressure
in the heating circuit " will appear in the screen; The air purge program starts when the water
pressure has been below 0.5 bar. The automatic air purge program will take approx. 7 minutes
and will be followed by the home screen when the water pressure is taken above 1.2 bar.
Filling Needed
ALERT
Warning 1P4
25/07/18 09:00
0.7 bar
Filling Needed
ALERT
Fault 108
25/07/18 09:00
0.4 bar
Restore the pressure in the heating circuit
18
