Honeywell RM7890 On/Off Primary Control
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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.
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 | Click for Price and Availability | |
|---|---|---|---|---|
| Pilot | Main Flame | |||
| 4 or 10 Second | Intermittent | Intermittent | RM7890A1015 | |
| 4 or 10 Second | Intermittent | Intermittent | Shutter Drive Capability | RM7890B1014 |
| 4 or 10 Second | Intermittent | Intermittent | Valve Proving (VPS) Check Feature, Blinking LED Fault Annunciation | RM7890A1056 |
| 4 or 10 Second | Intermittent | Intermittent | Available Shutter Terminal, Blinking LED Fault Annunciation | RM7890B1030 |
| 4 or 10 Second | Intermittent | Intermittent | Shutter Drive Capability, Valve Proving Check Feature, Blinking LED Fault Annunciation | RM7890B1048 |
| Accessories | ||||
| Honeywell Plug-In Keyboard and Four-Line Display Module (Required for Valve Proving and Post-Purge Features) | S7800A2142 | |||
