Brahma 30280055 CM32 control box

Brahma CM32 is a fully solid‑state microprocessor controller (“burner control unit”) designed for complete automation, reliable monitoring and maximum safety of atmospheric gas burners with a fan (sealed combustion chamber), operating in intermittent (cyclic) mode. It is specifically designed for controlling progressive (modulating) gas burners and supports operation with two solenoid valves. The Brahma CM32 “burner control unit” guarantees stable and long‑lasting operation of your heating equipment. Purpose and applications Brahma CM32 (art. 30280055) is ideally suited for automating gas equipment where high reliability and safety are required. The CM32 “burner management unit” is used in a wide range of heat‑generating equipment: Gas heating and combination boilers (domestic and industrial); Hot air guns, warm air generators; Combi steamers, radiant tube heaters and water heaters; Industrial furnaces, infrared (IR) heaters; Burners from leading brands (Riello, Weishaupt, Giersch, Viessmann, Lamborghini) and other gas equipment. Key functions and features Non‑volatile (hardware) lockout with manual reset: The key feature of this model. Unlike versions with electric reset, in any abnormal situation (e.g., ignition failure or sudden flame loss) the device automatically locks out. To restart, the Reset button on the housing must be pressed manually after the cause has been eliminated. This eliminates the risk of unintentional burner start‑up and meets the highest safety class. Instant ionisation flame monitoring: Flame detection is based on the rectifying properties of the flame. Response time on flame loss is less than 1 second, guaranteeing instantaneous gas shut‑off to prevent hazardous situations. Two independent safety contacts: A critically important safety feature. The gas valve output is equipped with two independent contacts connected in series, providing redundancy and eliminating the possibility of gas leakage if one of them fails. High reliability and service life: The service life of electronic components is at least 250,000 operations under maximum load, guaranteeing durability even under intensive conditions. Built‑in powerful high‑voltage ignition transformer: Provides stable and reliable ignition of the fuel‑air mixture without the need to purchase and install an additional external ignition unit. Auxiliary contact: Designed for systems with intermittent power supply, for example low‑power ignition or control of the main gas valve. Important: This contact is not isolated from the main supply voltage by reinforced insulation, therefore it is not suitable for controlling extra‑low voltage (SELV) circuits. Protection against external influences: A robust housing made of flame‑retardant plastic effectively protects the internal electronics from dust, dirt and mechanical damage. A built‑in varistor and fuse protect the device against voltage surges and short circuits on outputs (valves, fan, lockout signal). Compliance with international standards: Fully complies with European safety standards EN298:1993 and EN298:2003 (classification code FMCLXN), and has CE certificate (PIN code 0694BR1154). 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 CM32 Article numbers 30280055, 246.124.057 Rated supply voltage 230 V AC, 50/60 Hz (110‑120 V version available on request) Power consumption 2.5 VA / 15 VA (max. start‑up) Burner type Atmospheric, progressive (modulating), gas, with fan Operating mode Intermittent (must be stopped at least once every 24 hours for self‑diagnosis) Pre‑purge time (tv/tp) 30 seconds Safety time (ts) 15 seconds Waiting time (tw) 30 seconds Response time on flame loss 250,000 operations Important: Different versions of the CM32 may have different timing parameters. For article 30280055 the pre‑purge time (tv/tp) is 30 seconds and the safety time (ts) is 15 seconds. Parameter mismatch will lead to improper operation or safety lockouts. Also, 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 burners and equipment: Brahma CM32 is suitable for a wide range of progressive gas burners with a fan, including equipment from Riello, Weishaupt, Giersch, Viessmann, Lamborghini. Direct replacement: Article numbers 30280055 and 246.124.057 are identical and fully interchangeable. Accessories: A Microflat‑type connection base (e.g., art. 16023008) 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, it is strongly recommended to 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. Molex‑type connectors are provided for reliable connection. 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. Contamination or wear of the flame sensor 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 to perform the built‑in self‑diagnosis. Advantages over alternatives Highest safety level: Manual reset (non‑volatile lockout), two independent safety contacts, instant flame monitoring ( 250,000 cycles and built‑in protection against voltage fluctuations and short circuits. Economy and comfort: Progressive (modulating) power control optimises fuel consumption and reduces the number of burner starts/stops. Easy integration: Compact dimensions and standard interfaces simplify installation and replacement. Package contents Brahma CM32 burner control unit (art. 30280055) – 1 pc. Quick installation and operation guide. Note: The connection base, ionisation electrode and ignition electrode 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 30280055 (main Brahma article) 246.124.057 (alternative Brahma marking)