Brahma Combustion control unit NDTM31 37606005

The Brahma NDTM31 combustion control unit (SKU 37606005) is a microprocessor-based burner manager for automatic ignition and flame monitoring in progressive (modulating) atmospheric burners operating on gas or liquid fuel in intermittent mode. It integrates a high-voltage ignition transformer and control electronics in a compact housing, performing pre-purge (5 s), ignition, continuous flame monitoring, and safety lockout. The unit operates at 220–240 V, has a safety time of 5 s, and uses an ionization or photodiode flame detector. It features electrical lockout reset (automatic restart after power restoration) and weighs 0.2 kg with dimensions 10.7 x 8.1 x 3.6 cm and protection class IP00.

Parts of this type are selected by matching the series and type designation, supply voltage, safety and pre-purge times, flame detection method, and base pattern or plug configuration to the existing wiring harness. Verify the original part's markings (series, type, voltage, coding) and consult the installation manual to confirm identical timing and terminal assignments. These controls are not interchangeable across different series even within the same brand.

Typical failures include failure to detect flame within the safety time, leading to lockout, or malfunction of the ignition transformer causing no spark. The equipment may fail to start, lock out without restart, or cycle intermittently. Check the flame detector signal, wiring connections, and supply voltage.