Siemens Burner automatic controller LMO14.113C2

The Siemens LMO14.113C2 is a burner automatic controller for single-stage oil burners with intermittent operation. It is intended for burners with an oil throughput up to 30 kg/h and operates at 230 V. The controller carries out a 16 s pre-purge, a 15 s pre-ignition period, a 5 s waiting time and a 10 s safety time. Flame monitoring is performed by photoresistive (QRB) or QRC sensors; if the flame signal fails within the safety time, the unit locks out and the air pressure switch is monitored.

Replacement controllers of this type are chosen by matching the exact series and type designation, supply voltage, safety time, pre-purge time and flame detection method. The mounting base or plug pattern must also be compatible with the existing wiring; different series are typically not interchangeable, even within the same brand. Before installation, verify that the programmed times and electrical ratings match the burner specification and that any air pressure switch connection is present and correctly wired.