Honeywell On-Off Primary Control With Prepurge - RM7895C1020/U

The Honeywell On-Off Primary Control with Prepurge is a high-performing industrial control system crafted for efficient operation under a range of voltage conditions, specifically 120 VAC with a frequency of 50/60 Hz. Boasting an interrupted pilot type, this specialized control system enables a 10-second main flame establishing period and the versatility of either a 4-second or 10-second pilot flame establishing period. It is designed for compatibility with the 7800 Series Amplifiers and integrates a delayed main valve for control optimization. One noteworthy feature of this system is its inclusion of an ignition cutout during the Pilot Flame Establishing Period (PFEP).

This advanced system encompasses various functionalities, including automatic burner sequencing, flame supervision, system status indication, system diagnostics, and even self-troubleshooting. To ensure seamless operation, the use of a subbase, amplifier, and prepurge timer are required. To extend its usability, options for a Modbus interface, keyboard display module, remote display module, and a first-out expanded annunciator are included.

The On-Off Primary Control with Prepurge includes five LEDs that provide crucial sequence information at a glance, and it supports interchangeable plug-in amplifiers for flexibility. It enables local or remote annunciation of operation and fault information through the optionally available S7800 Keyboard Display Module. For enhanced security and accessibility, it houses a non-volatile memory that retains history files and lockout status even after a loss of power. Additionally, it allows for selectable relight or lockout on loss of flame.

As for its robust operating conditions, it assures high reliability and stability even in demanding environments, ranging from -40 F to 140 F. This solidifies the Honeywell On-Off Primary Control with Prepurge as a crucial component in any industrial automation and control system, underscoring its technical prowess and adaptability.