Siemens LFL1.335

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

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