This appliance can be fitted with an automatic filling valve assembly.
This comprises of a solenoid controlled by the main PCB which will top up the system pressure as and when required.
This is an optional extra and has to be fitted in place of the normal manual filling valve assembly and wired into the PCB. The feature also has to be turned on in the special functions menu.
The automatic filling valve parameters also have to be set up correctly based on the system design - these include:
Automatic Filling On/Off
Minimum System Pressure
Target System Pressure
Maximum Refill Time (solenoid open time)
Blocking Time (interval between fills)
Maximum number of Refills
Heating system type (size)
To enter the settings enter service/installer mode - press and hold tap and radiator symbols for 3 seconds then select "settings" > "special function" > "automatic filling"
Failure to set these parameters correctly will result in incorrect operation of the automatic filling feature and possible nuisance fault codes. These can also be displayed if radiators are being bled regularly.
It should also be noted that the function will be disabled if no pressure increase can be measured or the parameters mentioned above are exceeded - however in the service / installer menu there is an option to "reset filling" which resets the counters.
If a fault code is present it may need to be rest by pressing the up and down arrows simultaneously for 3 seconds or by turning the power to the appliance off then back on after 10 seconds.
If you wish to fault find on the intelligent filling loop (i.e. to check solenoid operation) then click here.