Honeywell RM7840 Microprocessor-Based Programming Control

Programming control with valve proving 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 for sequence information. Power LED blinks fault code on Lockout
  • 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, FM, CSA 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
Programming control with valve proving. 4- or 10-second pilot flame establishing period,
10-, 15-, 30-second or intermittent main flame establishing period. Running and low-fire interlocks.
Programming control with valve proving. 4- or 10-second pilot flame establishing period,
10- or  15-second main flame establishing period. Lockout, low-fire, and high-fire interlocks.


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



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