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AST 14 C 255/00
4.2 FLUE CLEANING FUNCTION
The boiler features a flue cleaning function which must be used to measure combustion
efficiency during operation and to set the burner.
This function can be enabled only in the H DOMESTIC HOT WATER operating
mode. To enable it, press “reset” key and keep it pressed for more than three seconds.
Now the boiler will perform the ignition sequence and then operates at the burner
maximum output set by parameter P7. The display will show simultaneously the current
(mA) supplied to the modulation coil, the flow temperature, the system pressure, the lit
flame symbol with burner on, the "broom" symbol to indicate that the flue cleaning function
is active:
Use the “+” or “- DHW” keys to change the value of the current supplied to the
modulation coil, form the minimum to the maximum value according to parameter P7. In
this case, the display will show the wrench symbol (parameter editing indicator) and the
value of the current supplied to the modulation coil being edited:
This operation is useful when setting the boiler combustion with closed casing. The
desired output is set by pressing the DHW keys.
