Scatola di comando Brahma 37542004 NDM31

Brahma NDM31 burner control unit (art. 37542004) is a microprocessor burner management unit from the New Digital Microflat series, designed for automatic control of two‑stage gas and oil burners with forced air supply and direct ignition. The device operates in intermittent mode and provides a full cycle: pre‑purge, ignition, flame monitoring and safety lockout. The NDM31 model features a short pre‑purge time (5 seconds) and is suitable for equipment requiring fast start‑up. The compact housing allows the unit to be mounted in confined spaces. Main technical specifications Parameter Value Supply voltage 220–240 V, 50/60 Hz Power consumption 30 VA Flame control Ionisation / photodiode FD / phototransistor FT Burner type Two‑stage, forced‑draught, direct ignition Fuel type Gas, liquid fuel Operating mode Intermittent Pre‑purge time (Tv) 5 seconds Safety time (Ts) 5 seconds Response time on flame loss less than 1 second Operating temperature –20 °C to +70 °C Protection class IP00 Built‑in fuse 4 A Dimensions (H×W×D) 10.7 × 8.1 × 3.6 cm Weight approx. 0.2 kg Key features Built‑in high‑voltage ignition transformer – no external unit required, simplifies installation. Microprocessor control with self‑diagnosis – periodic component checking before start‑up. Short pre‑purge time (5 seconds) – accelerates the burner start‑up cycle. Universal flame control – works with an ionisation electrode (gas), photodiode FD or phototransistor FT (liquid fuel). Two independent safety contacts – gas valve control is duplicated to increase reliability. Non‑volatile lockout with manual reset – after a fault, restart is only possible via a button on the housing. Protection against voltage surges and interference – varistor and built‑in EMC filter. LED indication – displays operating modes and fault codes for quick diagnostics. High service life – at least 250,000 operations at maximum load. Applications Two‑stage gas and oil burners with direct ignition Industrial and domestic heating boilers Heat generators, air heaters, hot air guns Baking ovens, drying chambers, process equipment Order codes 37542004, 246.124.241