Siemens Burner control unit LME22.331C2

This Siemens burner control unit, catalogue LME22.331C2, is designed for 1- and 2-stage gas burners in intermittent operation. It operates on 230 V supply voltage and performs a waiting time of 2 s, a pre-purge time of 30 s, a pre-ignition time of 3 s, and a safety time of 3 s. Flame supervision can be done with an ionization electrode or a UV (QRA) sensor. The BV2 ignition and shutdown timing is set to 8 s. The unit is cross-referenced as type numbers 0005030201, 0005030084, and 23400.

Replacement control boxes of this type are selected by exact series designation, supply voltage, pre-purge and safety times, and the flame detection method (ionisation for gas, UV/IR for oil or dual-fuel). Base or plug pattern must match the existing wiring harness, which connects pressure switches, flame detector, valves, and fan relay. Check the old control's type plate for full designation and safety-time markings before ordering.