Honeywell RM7890 Microprocessor-Based On/Off Primary Control

Microprocessor-based integrated primary burner control for automatically fired gas-, oil-, coal-, or combination fuel single burner applications.

Key Specifications

  • Functions include automatic burner sequencing, flame supervision, system status indication, system or self-diagnostics, and troubleshooting
  • Five LEDs provide sequence information. Optional local or remote annunciation of operation and fault information
  • Selectable relight or lockout on loss of flame
  • Valve proving feature tests valve seat integrity to detect a leak greater than 0.1% of burner input capacity
  • Requires S7800A1142 keyboard to set up valve proving (VPS) and change post-purge time
  • UL, CSA, FM, FEE approved

Model Selection Guide

Use this table to find the right model for your application.  Don't see the option you need? Call a Lesman sales specialist at 800-953-7626

Models Available to Buy Online at Lesman.com
On/Off primary control. 4- or 10-second pilot flame establishing period, intermittent main flame establishing period,
intermittent pilot type.
RM7890A1015
On/Off primary control with shutter drive capability. 4- or 10-second pilot flame establishing period, intermittent
main flame establishing period, intermittent pilot type.
RM7890B1014
On/Off primary control with Valve Proving feature and blinking LED fault annunciation. 4- or 10-second pilot flame
establishing period, intermittent main flame establishing period, intermittent pilot type.
RM7890A1056
On/Off primary control with Shutter Terminal available and blinking LED fault annunciation. 4- or 10-second pilot
flame establishing period, intermittent main flame establishing period, intermittent pilot type.
RM7890B1030
On/Off primary control with Valve Proving feature, shutter drive capability, and blinking LED fault annunciation.
4- or 10-second pilot flame establishing period, intermittent main flame establishing period, intermittent pilot type.
RM7890B1048

 

See our full combustion safety and efficiency instrumentation offering.

Flame safeguard systems
Flame safeguard systems
Plug-in modules
Keyboards, purge timer cards,
and annunciator panels
Flame detectors
Flame detectors
Flame amplifiers
Flame signal amplifiers
Pressure controls
Pressure controls
Temperature controls
Temperature controls
valves and motors
Shutoff valves, control valves,
and actuators
combustion efficiency analyzers
Combustion efficiency and
emissions analyzers

 

Videos

Subscribe to the Lesman Instrument Company YouTube channel.Lesman Instrument Company on YouTube

Video is a great way to learn about instruments and technology, and it's available whenever you need it. Watch step-by-step instructions on how to configure a transmitter, tune a controller, or troubleshoot a safety valve. We'll post videos we create, and those our manufacturer partners share with us, so you don't have to look in multiple places to find the video training you need.

Subscribe to Lesman's YouTube channel, and you'll get email notifications as soon as we add new training videos and webinars.