Skrzynka sterująca Brahma 30724281 CE391.4

Brahma CE391.4 is a microprocessor-based controller from the EUROBOX series, designed for automatic ignition control, flame monitoring and safe operation of atmospheric gas burners with a fan (single‑stage or two‑stage) in intermittent (cyclic) mode. Applications include: gas heating and combination boilers (domestic and industrial); hot air guns, warm air generators; air heaters, radiant tube heaters; water heaters, process furnaces, combi steamers; burners from Riello, Baltur, Weishaupt, Lamborghini and other brands. Key feature: electric reset (volatile lockout) This version of the CE391.4 features an electric lockout reset. After a safety shutdown (flame loss, ignition failure, etc.), restarting the burner does not require manually pressing a Reset button on the housing. Simply briefly interrupt and then restore power to the unit (break the power supply for a few seconds). This is convenient for systems with remote control where access to the unit is difficult. Timing parameters For article 30724281, the following factory parameters are set (verify on the housing label): Parameter Value Pre‑purge time (tv/tp / t1) 20 seconds Safety time (ts / t2) 10 seconds Waiting time (tw / t3) 20 seconds Important: The CE391.4 model exists in several versions with different timing parameters. For example, article 30658621 has tv/tp = 30 s, ts = 5 s. Before purchasing, always compare the marking on your old unit with the specifications of the new one. Incorrect selection based on pre‑purge time will lead to improper operation or safety lockouts. Main functions and features Fully automatic combustion cycle – The unit manages the sequence: false flame check → pre‑purge (20 s) → ignition → flame monitoring → safe shutdown on flame loss. 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. Electric lockout reset (volatile lockout) – Restart after a fault is performed by disconnecting and then reapplying power. Convenient for remote control. Built‑in high‑voltage ignition transformer (20 kV) – Powerful spark for reliable ignition. Built‑in EMC filter – Suppresses electromagnetic interference from the ignition transformer, ensuring stable electronics operation. Automatic self‑check at each start‑up – Diagnostics of key circuits. Robust housing made of impact‑resistant, self‑extinguishing plastic with IP00 protection (requires installation in a protective enclosure/cabinet). Mounting in any position (on DIN rail or by screws). High reliability – Controller service life: more than 250,000 switching cycles under maximum rated load. Standards compliance – The device is certified according to European directives and meets EN 298:2003 for automatic gas burner control systems. Technical specifications Parameter Value Model Brahma CE391.4 Article numbers 30724281, 246.124.155 Rated voltage 220–240 V AC, 50/60 Hz (110–120 V version available) Power consumption 9 VA Burner type Atmospheric gas burner with fan (single‑stage / two‑stage) Operating mode Intermittent (must be stopped at least once every 24 hours) Pre‑purge time (tv/tp) 20 seconds Safety time (ts) 10 seconds Waiting time (tw) 20 seconds Minimum ionisation current 1.2 µA (0.5 µA on request) Response time on flame loss 5 µA). Lockout reset – When a safety lockout occurs, find and eliminate the cause of the fault, then disconnect power for a few seconds and restore it. The unit will restart automatically. 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 Electric lockout reset – Convenience of remote restart without physical access to the unit. Optimal timing parameters (20/10/20 s) – Ideal balance for burners requiring extended purge time but not critically long. Reliability – More than 250,000 cycles, built‑in overvoltage protection and EMC filter. Versatility – Suitable for both single‑stage and two‑stage burners. Italian quality – High‑grade components, strict production control. Package contents Brahma CE391.4 burner control unit (art. 30724281) – 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 30724281 (main Brahma article) 246.124.155 (alternative marking)