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Description
Siemens LME21.430C2BT is a combustion control unit for gas burners. It is designed for single-stage and two-stage forced draught burners in intermittent operation. The unit manages start-up, flame monitoring, and operating cycles, and initiates emergency shutdown in case of faults.
Further details
Control Functions
start-up, flame monitoring, control of operating cycles and emergency shutdown
Operating sequence
pre-purge, ignition, flame monitoring and transition to operating mode
Choosing and fitting
Control boxes of this type are selected by matching the exact series and type designation to the burner or boiler specification. Key parameters include supply voltage, safety and pre-purge times, and the flame detection method (ionisation, UV, or IR). The base or plug pattern must also be compatible. Parts of this class are generally not interchangeable across series, even within the same brand. Always verify the existing control's designation and wiring before ordering.
