Brahma 20086601 CM191N.3 control box

Brahma CM191N.3 is a microprocessor-based controller (“burner management unit”) from the CM series, designed for automatic ignition control, flame monitoring and safe operation of atmospheric gas burners of both single‑stage and two‑stage types. The device operates in intermittent (cyclic) mode and is suitable for natural‑draught burners (without a fan) as well as forced‑air burners (with a fan). Applications: gas heating and combination boilers (domestic and industrial); hot air guns, warm air generators; air heaters, infrared heaters, radiant tube heaters; water heaters, process furnaces, combi steamers; burners from Riello, Baltur, Weishaupt, Lamborghini and other brands. Main functions and features Manual lockout reset (non‑volatile lockout) – under any abnormal condition (no flame, open ionisation circuit, ignition failure) the unit goes into lockout. Restart is only possible manually by pressing the Reset button on the housing after the cause has been eliminated. This prevents the burner from starting unintentionally and meets the highest safety class. Ionisation flame control – flame detection via an ionisation electrode (rectification effect). Response time on flame loss is less than 1 second, meeting EN 298 requirements. Built‑in high‑voltage ignition transformer – no external ignition unit required; spark voltage 20 kV. Two independent safety contacts – redundancy for gas valve control circuits for maximum safety. EMC filter – suppresses electromagnetic interference from the ignition transformer, ensuring stable operation of the electronics. Built‑in varistor and fuse – protection against voltage surges and short circuits. It is recommended to use an external fast‑acting fuse of suitable rating (the internal fuse is not replaceable). High reliability – controller service life: more than 250,000 switching cycles under maximum load. Compact impact‑resistant housing made of self‑extinguishing plastic. Mounting in any position (on DIN rail or by screws). Protection class IP00 (requires installation in a protective enclosure/control cabinet). Standards compliance – certified according to EN 298:2003 (classification code AMCLXN) and complies with CE directives. Technical specifications Parameter Value Model Brahma CM191N.3 Article numbers 20086601, 246.124.034 Rated voltage 220–240 V AC, 50/60 Hz (110–120 V version available) Power consumption 7 VA (start‑up up to 10 VA) Burner type Atmospheric gas, single‑stage / two‑stage Operating mode Intermittent (must be stopped at least once every 24 hours) Pre‑purge time (tv/tp) 1.5 seconds (verify on housing label) Safety time (ts) 10 seconds (verify on housing label) Waiting time (tw) 1.5 seconds (verify on housing label) Minimum ionisation current 1.2 µA Response time on flame loss 5 µA for reliable operation). Lockout reset – When a safety lockout occurs, find and eliminate the cause, then manually press the Reset button on the housing. Maintenance – Periodically check the condition of the ionisation electrode, its insulation and the gap relative to the burner. Operating mode – The unit is designed for intermittent operation. To maximise service life and safety, the system must be forced to stop at least once every 24 hours. Advantages over alternatives Manual lockout reset – provides the highest level of safety, preventing automatic restart. Reliability – more than 250,000 cycles, built‑in overvoltage protection and EMC filter. Versatility – suitable for single‑stage and two‑stage burners, with or without a fan. Ease of installation – base included, compact housing, DIN rail mounting. Italian quality – high‑grade components, strict production control, compliance with EN 298. Package contents Brahma CM191N.3 burner control unit (art. 20086601) – 1 pc. Connection base – 1 pc. Cable set for connection – 1 set. Quick installation and operation guide (several languages). Note: Ionisation electrode and ignition electrode are sold separately. Storage conditions and warranty Store in a dry place, protected from direct sunlight, at a temperature between –20 °C and +70 °C. The warranty period is typically 6–12 months from the date of sale (please check with the seller) provided that installation and operating rules are followed. Order codes 20086601 (main Brahma article) 246.124.034 (alternative marking)