Caja de control Brahma 37580000 NDTM11

Brahma NDTM11 Burner Control Unit (37580000) Digital microprocessor burner management unit for single‑stage and two‑stage forced‑draught gas and oil burners Brahma NDTM11 (art. 37580000) is a modern microprocessor controller from the Digital Microflat series, designed for automatic control and safe operation of forced‑draught burners. The device manages all stages of burner operation: from pre‑purge to flame monitoring, ensuring stable combustion and instant safety shutdown in any abnormal situation. The controller features a built‑in ignition transformer, an EMC filter against electromagnetic interference, and a non‑volatile lockout with manual reset. It is suitable for single‑stage and two‑stage burners operating on gas or liquid fuel. Technical specifications Parameter Value Article numbers 37580000, 246.124.199 Manufacturer Brahma (Italy) Type Microprocessor controller (burner management unit) Compatible burners Gas, oil (forced‑draught) Burner type Single‑stage or two‑stage Operating mode Intermittent (non‑continuous cycle) Supply voltage 220‑240 V AC, 50/60 Hz Power consumption 30 VA Pre‑purge time (tv/tp) 1.5 seconds Safety time (ts) 10 seconds Waiting time (tw) 1.5 seconds Flame control Ionisation electrode or photodiode FD Reset type Manual (button on housing) Built‑in ignition transformer Yes EMC filter (interference protection) Yes Varistor (surge protection) Yes Protection class IP00 Service life More than 250,000 operations Operating temperature –20 °C to +70 °C Dimensions (L × W × H) 107 × 81 × 36 mm Weight approx. 200 g Certification CE, EN298, EN230:2005 Warranty 6 months Key advantages Direct replacement for obsolete FM11 models: Brahma NDTM11 is the direct successor and replacement for outdated FM11 units. This makes the controller ideal for service replacement on existing equipment without the need to rewire the connection. Multi‑level safety system: The unit features a non‑volatile lockout with manual reset. In the event of a fault, restart is only possible after eliminating the cause and pressing the button on the housing. The safety time is 10 seconds, and the shutdown time on flame loss is less than 1 second, preventing gas accumulation and explosive situations. High‑precision microprocessor control: The controller ensures accurate timing of the cycle (1.5 s pre‑purge, 10 s safety time), promoting stable ignition, complete fuel combustion and reduced emissions. Versatility and operational stability: NDTM11 works equally effectively with both gas and oil burners. Thanks to a built‑in EMC filter, it is immune to electromagnetic interference, ensuring stable operation even near heavy industrial equipment. Reliability and durability: The controller housing is made of impact‑resistant plastic, protecting the internal electronics from impact and dust. The manufacturer states a service life of more than 250,000 operations, guaranteeing long‑term reliability. Protection against external influences: A built‑in varistor protects the device against mains voltage surges, and a built‑in fuse protects the internal relays against short circuits on outputs (gas valves, fan, lockout signal). Operating principle Start: Upon a signal from the thermostat, the pre‑purge phase begins (1.5 seconds), purging the combustion chamber. Ignition: After purge completion, the gas valve EV1 opens and the built‑in transformer energises the electrodes to create a spark. Flame monitoring: During the safety time (10 seconds), the system waits for a flame signal from the ionisation electrode or photodiode. Operation: Once the flame is successfully detected within the allotted time, the ignition transformer is de‑energised and the burner enters normal operation. Safety shutdown: If the flame does not appear or is lost during operation, the control unit instantly (in less than 1 second) shuts off the gas supply and enters a non‑volatile lockout state, requiring a manual reset. Fault indicators Symptom Possible cause Burner does not start, pump and fan not running No power, faulty control unit or external circuits (thermostat, pressure switch) Burner starts but locks out after 10 seconds No flame signal during safety time: faulty flame sensor (ionisation electrode/photodiode), no spark, no fuel Burner shuts down spontaneously during operation Loss of flame signal or false trigger of a safety device (e.g., air pressure switch) Reset button not on front panel but on the unit itself Design feature – access to the unit is required for reset if mounted inside the burner housing Visible damage Cracks in the housing, burn marks on contacts or terminal blocks Replacement recommendations Qualification: Installation and replacement of the control unit must be carried out only by qualified personnel authorised to work with gas equipment. Compatibility: When replacing, ensure that your burner parameters match the controller settings (1.5 s pre‑purge, 10 s safety time). For two‑stage burners, a delay for EV2 activation upon flame detection is provided. Inspection: After installation, check the tightness of all gas connections and the correct operation of all safety stages. Protection from external influences: IP00 protection class requires proper installation and grounding to ensure safe operation. Order codes 37580000, 246.124.199