Brahma Burner control unit NDM11 37500010

The Brahma NDM11 37500010 is a microprocessor-based burner control unit designed for automatic ignition and flame monitoring in atmospheric gas and liquid fuel burners. It operates in intermittent mode, providing a complete cycle of ignition, flame supervision, and safety lockout in abnormal conditions. This model requires no pre-purge (pre-purge time: 0 s) and features a safety time of 5 seconds. It operates on a supply voltage of 220–240 V and supports flame detection via an ionisation electrode or photodiode FD. The unit has a protection class of IP40, dimensions of 10.7 x 8.1 x 3.6 cm, and operates within a temperature range of -20 to 60 °C.

Parts of this type are selected by matching the supply voltage, safety time, and flame detection method to the burner's requirements. The control unit must be compatible with the burner's fuel type (gas or liquid fuel) and its ignition system. Before ordering, verify the mounting dimensions and ensure the unit fits the available space. Installation should follow the manufacturer's wiring diagram, connecting the flame sensor and ignition transformer correctly.

When such control units fail, the burner may fail to ignite, lock out after the safety time, or shut down unexpectedly during operation. Common issues include a faulty flame sensor, incorrect wiring, or internal component failure. Check the flame detector and its connections, and verify the supply voltage is within the specified range.