The Siemens LAL2.25 is a robust oil burner control box designed for the supervision, startup, and control of medium to high capacity forced draught oil burners operating on an intermittent basis (requiring at least one controlled shutdown every 24 hours). This control unit manages the entire burner sequence, from prepurge to post-ignition, and continuously monitors the flame using a QRB… photoresistive detector or a QRA… blue-flame detector. In the event of a flame failure or other fault, the LAL2.25 initiates a safety lockout to prevent hazardous conditions, making it an essential safety component for industrial heating systems, boilers, and furnaces.