Honeywell On-Off Primary Control With Prepurge - RM7895D1011/U

The Honeywell On-Off Primary Control with Prepurge is a 120 VAC, 50/60 Hz controller designed with an interrupted pilot type. It features a specified main flame establishing period of ten seconds and a pilot flame establishing period that can be adjusted between 4 to 10 seconds. It has a delayed main valve and is compatible with Honeywell's 7800 Series Amplifiers.

This controller is proficient in automatic burner sequencing, flame supervision, and displaying system status. It also has self-diagnostic and troubleshooting capabilities, making it essential for maintaining optimal system operation. However, note that for the operation of this controller, a subbase, amplifier, and prepurge timer are mandatory.

The controller provides an array of options for customization, including a Modbus interface, keyboard display module, remote display module, and first-out expanded annunciator. One of its standout features is the inclusion of five LEDs, providing readily accessible sequence information. It is engineered for interchangeable plug-in amplifiers and allows for local or remote annunciation of operation and fault information when using the optional S7800 Keyboard Display Module.

For added convenience and reliability, the controller is equipped with non-volatile memory, ensuring retention of history files and lockout status even after power loss. Users can select between relight or lockout options in the event of flame loss. Moreover, the controller features a dynamic airflow switch check.

In terms of its technical specifications, this On-Off Primary Control with Prepurge controller is specifically designed to withstand demanding conditions, capable of operating in temperatures ranging from -40 F to 140 F.