Siemens Control box LME11.230C2

The Siemens LME11.230C2 is a burner control box intended for oil or gas fan burners of single-stage and two-stage design. It runs on an AC supply at 50–60 Hz with a power consumption of 12 W. The control box enforces a safety time of 3 s, a pre-purge time of 20 s, a pre-ignition time of 2 s, and a waiting time of 2.5 s. Its IP40 protection class and 10 A external fuse rating specify the electrical and environmental limits. The unit supervises the start-up sequence, proving flame within the set safety time and locking out otherwise.

When selecting a replacement control box of this type, you must match the original in series designation, supply voltage, programmed safety times, pre-purge duration, and physical connection pattern. Even a control box from the same brand but a different series or type code is not interchangeable; the safety time is a critical parameter and a mismatch creates a hazardous condition. Verify that the application — burner model, fuel type, and flame detection method — corresponds to the original specification before ordering.