Honeywell On-Off Primary Burner Control - RM7896D1027/U

The Honeywell On-Off Primary Burner Control is an integral component for industrial automation, functioning at 120 VAC and a frequency of 50/60 Hz. This device operates with an interrupted pilot type. Encompassing both pre and post purge phases, it offers a 10-second main flame establishing period with the option of either a 4 or 10-second pilot flame establishing period. It concludes the sequence with a 60-second post purge period.

The Primary Burner Controller offers various key functionalities such as automatic burner sequencing, flame supervision, system status indication and diagnostics. It provides troubleshooting capabilities either within the system or independently. The unit also includes a delayed main valve and a dynamic airflow switch. It requires a subbase, an amplifier, and a purge card for operation.

Additional options that enhance its application include a Modbus interface, a keyboard display module, remote display module, and a first-out expanded annunciator. Status updates and sequence information are provided with the aid of five LEDs. The controller houses interchangeable plug-in amplifiers along with a feature for local or remote annunciation of operation and fault information, accessible through an optional S7800 keyboard display module.

The controller is designed with non-volatile memory, safeguarding history files and lockout status even in the event of power loss. Furthermore, the controller offers the flexibility to select recycle or lockout upon loss of airflow or flame. It also includes shutter drive output.

This On-Off Primary Control operates under conditions ranging from -40 F to 140 F. The prepurge phase is determined by the ST7800A Purge Timer Card. Additionally, it accommodates selectable interlocks to guarantee safe and efficient operation.