Honeywell RM7890B1014 7800 Series Burner Controller
$649.00
The Honeywell RM7890B1014 is a 7800 Series microprocessor-based integrated burner control.
4 in stock
Description
- Automatic Primary Burner Control: Provides comprehensive microprocessor-based flame safeguard automation for automatically fired gas, oil, or combination fuel single-burner applications.
- Safety Purge & Ignition Sequencing: Executes precise control loops for safety pre-purge, pilot ignition trial, main flame trial, and post-purge sequences to guarantee safe combustion cycles.
- Subbase Mounting Architecture: Mounts directly onto standard Q7800 wiring subbases, enabling quick surface or panel installation, simplified field wiring, and effortless module replacement.
- Modular Component Flexibility: Requires plug-in ST7800 purge timer cards and R78 series flame signal amplifiers, allowing custom configuration tailored to specific fuel types and sensor technologies.
- Onboard Diagnostic LED Status: Features five diagnostic light-emitting diodes (Power, Pilot, Flame, Main, and Alarm) for instant visual feedback on sequence status and quick fault troubleshooting.
- Expanded System Monitoring: Supports the optional S7800 Keyboard Display Module (KDM) for detailed first-out fault annunciation, system diagnostics, and operating history tracking.
- Non-Volatile Memory Retention: Retains lockout status, historical fault data, and operating sequence parameters even during unexpected power outages.
Documentation
Technical Specifications
| Part Number | RM7890B1014 |
|---|---|
| Manufacturer | Honeywell |
| Type | Burner Control Module |
| Voltage | 120 Vac |
| Application | Combustion Safeguard |
| Compatibility | Gas/Oil Burners |
| Pilot Establishing | Selectable 4 or 10 seconds |
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Description
The Honeywell RM7890B1014 7800 Series Burner Controller is a microprocessor-based primary flame safeguard relay engineered to deliver automated ignition sequencing, safety purge timing, and continuous flame monitoring for commercial and industrial single-burner gas, oil, or dual-fuel equipment. Acting as the central intelligence of the combustion control loop, the RM7890B1014 manages critical startup cycles—including pre-purge, pilot trial for ignition, main flame trial, and post-purge—to ensure safe operational sequencing. Equipped with onboard status LEDs, advanced fault annunciation, and full compatibility with plug-in flame amplifiers and Keyboard Display Modules (KDM), this 120V AC primary control module optimizes combustion safety, prevents unburned fuel buildup, and streamlines system diagnostics across boiler, furnace, and process heating applications.
Frequently Asked Questions
What is the primary function of the Honeywell RM7890B1014 burner controller?
The RM7890B1014 serves as an automatic primary flame safeguard relay that safely sequences and monitors burner startup, pre-purge timing, pilot ignition, main flame light-off, and fuel valve shutdown on single-burner applications.
What additional components are required to install and operate the RM7890B1014?
To function complete, the RM7890B1014 relay module requires a Q7800 wiring subbase, a plug-in ST7800 purge timing card (to set pre-purge length), and a compatible R78 Series plug-in flame signal amplifier paired with a flame sensor.
Which flame detectors are compatible with the Honeywell RM7890B1014?
Compatibility depends on the plug-in amplifier installed. It supports optical UV sensors, rectification flame rods, infrared scanners, or self-checking UV detectors when paired with their corresponding R7847, R7848, R7849, R7861, or R7886 amplifier modules.
How does the RM7890B1014 handle burner lockouts and fault diagnostic reporting?
If a flame failure or safety interlock trip occurs, the module immediately initiates a safety shutdown, locks out fuel delivery, and illuminates the front panel Alarm LED. Detailed lockout cause codes can be read by attaching an optional S7800 Keyboard Display Module.
Is the Honeywell RM7890B1014 designed for intermittent or continuous duty operation?
The RM7890B1014 is primarily intended for intermittent operation burners that cycle off at least once every 24 hours. However, when paired with dynamic self-checking flame amplifiers and detectors, it can safely support continuous-firing heating systems.
