Siemens LFL1.638 control box

Electromechanical burner control Siemens LFL1.638 for control and monitoring of two-stage gas or dual-fuel forced-draft burners of medium or high power, for intermittent operation with ionization flame detector or UV flame detector. Pre-purge time: 66 s. Safety time: 2.5 s. Pre-ignition time: 5 s.