Description 

The Honeywell RM7890 A is an advanced On/Off primary burner control unit designed for safety monitoring of industrial gas and oil burners. Engineered to provide reliable flame safeguard and sequencing for single or dual fuel burners, it supports an extensive set of operational diagnostics and annunciation features. 

Technical Specifications 

Information About RM7890 A

The RM7890 A is part of Honeywell’s 7800 Series burner control family and is configured as a primary On/Off controller for automatic burner sequencing. It supports burner safety management through integrated fault annunciation LEDs and retains operation history after power loss via nonvolatile memory. The controller operates with intermittent pilot systems, offers selectable interlock options, and supports remote annunciation for system alerts. Advanced modular expandability allows integration with keyboard displays and remote reset modules for greater flexibility in complex systems.

Key Features:

• Integrated self-diagnostics with blinking LED fault annunciation.
• Supports modular accessories like keyboard displays and remote display modules.
• Intermittent pilot operation with 4 or 10-second flame establishing period.
• Stores sequence and alarm history through nonvolatile memory.
• Selectable recycle or lockout based on flame/airflow loss.
• Compatible with plug-in flame amplifiers and shutter drives.
• Airflow switch check and delayed main valve control.
• Designed for panel mounting with screw terminal connections.
• Fully programmable post-purge and interlock configuration.

The RM7890 A ensures safe and precise burner operation by integrating intelligent fault detection and modular adaptability.