Brahma Microprocessor-based controller CM11F 37100252

The Brahma CM11F (SKU 37100252) is a microprocessor-based controller for automatic ignition control, flame monitoring, and safe operation of two-stage atmospheric gas burners. It operates at 220–240 V AC, 50/60 Hz, with a safety time of 10 seconds and flame detection via ionisation. The unit supports intermittent (cyclic) operation and is certified to EN 298:1993/2003 and CE. It includes a manual lockout reset and an external fuse rating of 3.15 A. The controller has a service life of 250,000 cycles under maximum load.

When selecting a replacement control box of this type, verify the supply voltage, safety time, and flame detection method (ionisation) match the burner's requirements. Ensure the unit is compatible with two-stage burners and the operating mode (intermittent) aligns with the application. Check the mounting form and connection base compatibility, as these may vary. Compare the pre-purge and waiting times marked on the old unit with the new one, as these can differ between versions.

Typical failures include loss of flame detection, leading to a safety lockout that requires manual reset. The burner may fail to ignite or shut down unexpectedly. Check the ionisation electrode for contamination or incorrect positioning, and verify the external fuse is intact. If the unit does not reset, the internal components may be faulty, requiring replacement.