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3 For Your Safety
3.6.3 Checking Burner Sequencer Part
Check the following:
• Correct setting of time parameters (especially safety and pre-purge periods).
• Whether an ionisation or approved self-checking flame sensor is used as only these types
allow continuous operation.
• Functioning of flame sensor
– in case of flame blow-off during operation
– parasitic light being present during pre-purge period
– missing flame formation at the end of the safety-period
• Check the performance of all available and/or essential incoming signals, such as:
– Air pressure switch
– 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.
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