Brahma-37103208-CM12F-Steuergerät

Brahma CM12F is a microprocessor-based controller (“burner management unit”) from the Microflat series, designed for automatic ignition control, flame monitoring and safe operation of two‑stage atmospheric gas burners operating in intermittent (cyclic) mode. The device is equally effective for burners with forced air supply (with a fan) and for burners without a fan. Applications: gas heating and combination boilers (domestic and industrial); hot air guns, warm air generators (Master BV70, BV110, BV170, BV290, B230, B360, OKLIMA and others); air heaters, infrared heaters, radiant tube heaters; water heaters, process furnaces, combi steamers, ovens, cooktops; burners from Riello, Baltur, Weishaupt, Lamborghini and other brands. Main functions and features Support for two‑stage burners – Provides control of the first and second power stages, optimising fuel consumption and reducing the number of starts/stops. 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, maximising 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). Auxiliary contact – For low‑power ignition or for controlling the main solenoid valve in systems with intermittent power supply. Important: This contact is not isolated by reinforced insulation, therefore it is not suitable for controlling extra‑low voltage (SELV) circuits. 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 298:1993/2003 (classification code AMCLXN) and complies with CE directives (CE PIN 0694BR1154). Technical specifications Parameter Value Model Brahma CM12F Article numbers 37103208, 246.124.080 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, two‑stage Operating mode Intermittent (must be stopped at least once every 24 hours) Pre‑purge time (tv/tp) Check on housing label (typically 1.5 s) Safety time (ts) Check on housing label (typically 10 s) Waiting time (tw) Check on housing label (typically 1.5 s) 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. Contamination or wear can lead to false trips. 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 Specialisation for two‑stage burners – Optimal power control, fuel savings. Highest safety level – Manual lockout reset, two independent safety contacts, instant flame monitoring (<1 s). Reliability – More than 250,000 cycles, built‑in overvoltage protection and EMC filter. Ease of installation – Built‑in powerful ignition transformer (20 kV), compact housing, DIN rail mounting. Italian quality – High‑grade components, strict production control, compliance with European EN 298 standards. Package contents Brahma CM12F burner control unit (art. 37103208) – 1 pc. Quick installation and operation guide (several languages). Note: Ionisation electrode, ignition electrode and connection base 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 37103208 (main Brahma article) 246.124.080 (alternative marking)