Siemens „LAL2.25-110V“-Steuergerät

Siemens LAL2.25 electromechanical burner control, 110V is used for starting and controlling multi-stage or modulating forced-draft oil burners of medium and high power with intermittent operation and air pressure monitoring via functional test of the air pressure relay during start-up and operation. Yellow flame monitoring is performed using a photoresistive sensor QRB1…, blue flame monitoring using a RAR... sensor with selenium photocell. Main characteristics: Supply voltage: AC 110 V. Pre-purge time: 22.5 s. Safety time: 5 s. Time to ignition: 2.5 s. Time after ignition (ignition transformer connected to terminal): 15 s. Interval between voltage application to terminals 18 and 19 (fuel valve): 7.5 s. Interval between voltage switching at terminals: 7.5 s. Post-purge time: 15 s. Fan motor start delay: 2.5 s. Start sequence duration: 47 s.