Burner flame control unit

摘要

A unit (1) for controlling the flame of a burner. The unit (1) has a first programmable control device (9) for controlling fuel feed devices and combustion air ventilation devices of the burner by means of a number of control outputs (6, 7, 8) controlled by respective switch blocks (16, 17, 18), and for safely controlling overall operation of the unit (1). The unit (1) also has a second control device (20) for further safety control independent of that performed by the first device (9). And the unit (1) is characterized in that the second control device (20) comprises a hardware watch-dog. <IMAGE>