Brahma Control box MM191N.4 22089901

The Brahma MM191N.4 control box (SKU 22089901) is a microprocessor-based burner manager for industrial heating systems. It automates and supervises gas burner operation, supporting single-stage and two-stage burners in intermittent mode. Flame detection uses the rectifying properties of an ionization electrode, with a flame loss reaction time of less than 1 second. It supports ionisation, UV, and IR flame detection methods. The device includes non-volatile lockout with manual reset and two independent safety contacts for gas valve control.

Parts of this type are selected by exact series and type designation, supply voltage, safety and pre-purge times, and the flame detection method (ionisation, UV, or IR). The base or plug pattern must match the burner. When replacing, verify the original part data and ensure the wiring diagram and flame detection method are compatible. Burner controls are not interchangeable across series, even within the same brand, due to safety time differences.

Common failure modes include lockout due to no flame, ignition failure, or ionization circuit break. The equipment may fail to start or shut down unexpectedly. Check the flame detector, wiring, and reset button. If the control box is faulty, it may not respond to reset or may lock out repeatedly.