123 For Your Safety3.6.3 Checking Burner Sequencer PartCheck the following:• Correct setting of time parameters (especially safety and pre-ventilation periods).• Whether an ionisation flame sensor or a corresponding flame scanner is used since onlythese are capable of running in continuous operation.• Functioning of flame sensor in case of flame blow-off during operation, parasitic light beingpresent during pre-ventilation period and missing flame formation at the end of the safety-period.• Check the performance of all available and/or essential incomming signals, such as for:– Air pressure– Gas pressure - min/oil pressure - min– Safety interlock chain (e.g. STB)• Activated Leakage control function for gas valves if required for application purposes.– If necessary, ensure a correct leakage quantification.