Brahma 37100252 CM11F control box

Brahma CM11F 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 suitable for burners both with and 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; water heaters, process furnaces, combi steamers; burners from Riello, Baltur, Weishaupt, Lamborghini and other brands. Important information about timing parameters The CM11F model is available in several versions that differ in pre‑purge time (tv/tp) and waiting time (tw). For article 37100252 these parameters may be preset by the manufacturer. Before purchasing, always compare the marking on your old unit with the specifications of the new one. Typical combinations for CM11F: tv/tp = 1.5 s, ts = 10 s, tw = 1.5 s (e.g., art. 37100213) tv/tp = 30 s, ts = 10 s, tw = 30 s (e.g., art. 37100253) Check the actual values with the seller or from the marking on the housing. 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. 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. Manual lockout reset – Under any abnormal condition (no flame, open ionisation circuit, ignition failure) the unit goes into safety 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. Built‑in high‑voltage ignition transformer – No external ignition unit required. EMC filter – Suppresses electromagnetic interference from the ignition transformer, ensuring stable operation. Built‑in varistor and fuse – Protection against voltage surges and short circuits. It is recommended to use an external fast‑acting fuse rated at no more than 3.15 A (the internal fuse is not replaceable). Two independent safety contacts – Redundancy for gas valve control circuits. High reliability – Controller service life: more than 250,000 switching cycles. Standards compliance – Certified according to EN 298:1993/2003 (classification code AMCLXN) and complies with CE directives. Technical specifications (general) Parameter Value Model Brahma CM11F Article numbers 37100252, 246.124.136 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 Safety time (ts) 10 seconds (typical) Waiting time (tw) Check on housing label Minimum ionisation current 1.2 µA Response time on flame loss 5 µA). Lockout reset – When a safety lockout occurs, find and eliminate the cause, then 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 Specialisation for two‑stage burners – Optimal power control, fuel savings. Reliability – More than 250,000 cycles, built‑in overvoltage protection and EMC filter. Safety – Manual lockout reset + non‑volatile fault memory meet the highest EN 298 standards. Ease of installation – Built‑in ignition transformer, compact housing, DIN rail mounting. Italian quality – High‑grade components, strict production control. Package contents Brahma CM11F burner control unit (art. 37100252) – 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 37100252 (main Brahma article) 246.124.136 (alternative marking)