Siemens LGB21.130A27 control box

Siemens LGB21.130A27 burner control unit for pre-purge with low air volume and actuator control. Siemens LGB21.130A27 for start-up and control of single- and two-stage gas or combined gas/oil burners in intermittent operation. Pre-ventilation time: 7 s. Safety time: 3 s. Time before ignition: 2 s.