Brahma Burner management unit CM31 30082315

The Brahma CM31 (SKU 30082315) is a microprocessor-based burner management unit designed for progressive (modulating) atmospheric gas burners. It operates at 230 V AC and includes a built-in high-voltage ignition transformer. The unit features a pre-purge time of 30 seconds, a safety time of 5 seconds, and uses ionisation flame detection with a reaction time of less than 1 second on flame loss. It has a manual lockout reset and is certified to EN 298:2003. The device measures 116 x 96 x 36 mm, weighs 170 g, and has an ambient temperature range of -20 to 60 °C.

Parts of this type are selected by matching the supply voltage, flame detection method, and safety time to the burner's requirements. The unit must be installed in a protective control cabinet due to its IP00 protection class. Ensure the mounting dimensions and connection diagram align with the existing wiring. The base is typically purchased separately.

Common failures include lockout due to ignition failure or flame loss, often caused by a faulty ionisation probe or contaminated flame sensor. The equipment may shut down and require manual reset. Check the flame detection circuit and ignition transformer for proper operation.