Caja de control Brahma 20023101 CM191N.2

Brahma CM191N.2 (art. 20023101 / 246.124.029) is a modern microprocessor controller (“burner control unit”) that fully automates and ensures the safe operation of gas burners. This device is the reliable heart of your heating system. Purpose and applications Brahma CM191N.2 is specifically designed for atmospheric gas burners with progressive (modulating) power control, operating in intermittent (cyclic) mode. It is equally effective for controlling burners with or without a fan. Thanks to its characteristics, the controller is widely used in various types of heat‑generating equipment, including: gas heating and combination boilers (domestic and industrial); hot air generators, hot air guns; furnaces, ovens, cookers and other gas equipment with atmospheric burners. Main functions and features Manual lockout reset: A key safety feature. Under any abnormal condition (no flame, ignition failure, etc.), 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 eliminates the risk of unintentional burner start‑up. Ionisation flame control: Accurate flame detection using an ionisation electrode (based on the rectifying properties of the flame). Response time on flame loss is less than 1 second, guaranteeing instantaneous gas shut‑off. Built‑in powerful ignition transformer: Equipped with a high‑efficiency solid‑state transformer, providing stable and reliable ignition without the need to purchase and install a separate ignition unit. Two independent safety contacts: Two independent contacts are provided on the gas valve output, ensuring redundancy for critical circuits and maximum safety. High service life and reliability: The controller is rated for more than 250,000 switching cycles under maximum load. Electronic protection: A built‑in varistor protects against voltage surges. An internal fuse protects against short circuits on outputs (valve, fan). Important: The manufacturer recommends installing an external fast‑acting fuse rated at no more than 3.15 A for additional protection, as 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. Compact and robust housing: Made of impact‑resistant, heat‑resistant plastic, protecting the electronics from mechanical damage, dust and dirt. Mounting in any position (on DIN rail or by screws). Standards compliance: Certified according to European standards (CE) and fully complies with EN 298:2003 for automatic gas burner control systems. Technical specifications The exact parameters for this model are given below; they must be considered when selecting or replacing the control unit. Parameter Value Model Brahma CM191N.2 Article numbers 20023101, 246.124.029 (identical) Rated supply voltage 230 V AC, 50/60 Hz Power consumption 7 VA Pre‑purge time (tv/tp / TW) 1.5 seconds Safety time (ts / TS) 5 seconds Waiting time (tw) 30 seconds Minimum ionisation current 1.2 µA Response time on flame loss 250,000 cycles Important: Protection class IP00 means the device has no built‑in protection against dust or moisture. To ensure reliable and safe operation, it must be installed inside a protective control cabinet. Compatibility and replacement Compatible equipment: The unit is suitable for a wide range of atmospheric gas burners, including equipment from Riello, Baltur, Weishaupt, Lamborghini, as well as for hot air guns and boilers from other manufacturers with timing parameters 1.5/5/30 s. Direct replacement: Article numbers 20023101 and 246.124.029 are identical and fully interchangeable. Accessories: A Microflat‑type connection base is required (purchased separately). The connection diagram is printed on the device housing. Installation and operation Mounting: The device can be mounted in any position. Due to IP00 protection class, install the unit in dry, well‑ventilated locations, always inside a protective enclosure/control cabinet that prevents dust and moisture ingress. Wiring: Always disconnect power before starting work! Strictly follow the correct connection of live and neutral wires, as well as gas valve control and flame sensor circuits according to the diagram on the housing. External protection: It is recommended to additionally protect the unit with an external fast‑acting fuse rated at no more than 3.15 A. Initial start‑up: Before start‑up, ensure the combustion chamber has been purged, the ionisation electrode is correctly positioned and provides a stable signal current (recommended >5 µA for reliable operation). Lockout reset: When a safety lockout occurs (controller stops starting the burner, red LED lit), find and eliminate the cause (e.g., check gas supply, electrode condition, etc.), then manually press the Reset button on the housing. Maintenance: Periodically check the condition of contacts, wiring integrity, and the cleanliness and position of the ionisation electrode. 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 to perform the built‑in self‑diagnosis. Advantages over alternatives Manual lockout reset: Provides the highest level of safety, preventing automatic restart of the burner while a fault remains uncorrected. Versatility: Suitable for burners with or without a fan, as well as for single‑ and two‑stage systems. High reliability and service life: More than 250,000 operating cycles, built‑in protection against voltage surges and short circuits. Ease of installation and diagnostics: Compact housing, DIN rail mounting and LED status indication for rapid fault localisation. Italian quality: High‑grade components and strict production control, guaranteeing stable operation under all conditions. Package contents Brahma CM191N.2 burner control unit (art. 20023101) – 1 pc. Quick installation and operation guide (several languages). Note: The connection base, ionisation electrode, ignition electrode and other accessories are sold separately. Storage conditions and warranty Warranty period: Typically 6‑12 months from the date of sale (please check with the seller) provided that installation and operating rules are followed. Storage conditions: Store in a dry place, protected from direct sunlight, at a temperature between –20 °C and +70 °C. Order codes 20023101 (main Brahma article) 246.124.029 (alternative Brahma marking)