Key Product Features

Gas burner controls

  • For gas, oil or dual-fuel forced draft burners of medium to high capacity
  • For multistage or modulating burners in intermittent operation; for safety reasons, at least one controlled shutdown must take place every 24 hours
  • With checked air damper control
  • Flame supervision: with UV detectors QRA, and with ionization probe


  • Control and supervision of forced draft burners of expanding flame and interrupted pilot construction
  • For medium to high capacity
  • For intermittent operation (at least one controlled shutdown every 24 hours)
  • Universally applicable for multistage or modulating burners
  • For use with dual-fuel burners
  • For use with stationary air heaters
  • The difference between 01 series and 02 series is the duration of the safety time for the pilot burner of burners equipped with pilot gas valves
  • For atmospheric burners of high capacity, employ LFL1.638 type

Warning Notes

To avoid injury to persons, damage to property or the environment, the following warning notes should be observed!

  • Do not open, interfere with or modify the unit!
  • Before performing any wiring changes in the connection area of the LFL1, completely isolate the unit from the mains supply (all-polar disconnection)
  • Ensure protection against electric shock hazard by providing adequate protection for the burner control’s connection terminals
  • Check to ensure that wiring is in an orderly state
  • Press the lockout reset button only manually (apply a force of no more than 10 N), without using any tools or pointed objects
  • Do not press the lockout reset button on the unit or the remote lockout reset button for more than 10 seconds since this damages the lockout relay in the unit
  • Fall or shock can adversely affect the safety functions. Such units may not be put into operation, even if they do not exhibit any damage
  • In the case of flame supervision with UV detectors QRA, it should be noted that sources of radiation such as halogen lamps, welding equipment, special lamps, ignition sparks, as well as X-rays and gamma radiation, can produce erroneous flame signals