Siemens LOA25.173C27 control box

Electromechanical burner control Siemens LOA25.173C27 is used for start-up and supervision of 1- or 2-stage oil burners with intermittent operation. Siemens LOA25.173 C27 burner control unit is used for burners with fuel throughput up to 30 kg/h. Yellow flame monitoring is performed by a photoresistive sensor QRB..., blue flame monitoring by a sensor QRC. Pre-purge time: 13 s. Safety time: TSAmax 10 s. Pre-ignition time: 13 s.