Honeywell RM7890 On/Off Primary Control

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Price $690.48

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SKU
RM7890

Honeywell RM7890 microprocessor-based integrated burner control provides on-off primary control function for automatically fired gas, oil, and combination fuel single-burner applications. For configurable purge timing, see the RM7895 and RM7898 models.

See model selection chart below.

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

  • 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
  • Optional 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, FCC approved

Model Selection Guide

A complete flame safeguard system consists of a relay module, subbase, flame detector, and flame amplifier. Add functionality with a keyboard display module (KDM), communication and display modules, and combustion system manager software.

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

Flame Establishing Period Pilot Type On/Off Primary Control
Special Features
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Pilot Main Flame
4 or 10 Second Intermittent Intermittent  RM7890A1015
4 or 10 Second Intermittent Intermittent Shutter Drive CapabilityRM7890B1014
4 or 10 Second Intermittent Intermittent Valve Proving (VPS) Check Feature, Blinking LED Fault AnnunciationRM7890A1056
4 or 10 Second Intermittent Intermittent Available Shutter Terminal, Blinking LED Fault AnnunciationRM7890B1030
4 or 10 Second Intermittent Intermittent Shutter Drive Capability, Valve Proving Check Feature, Blinking LED Fault AnnunciationRM7890B1048
Accessories
Honeywell Plug-In Keyboard and Four-Line Display Module (Required for Valve Proving and Post-Purge Features) S7800A2142
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