The Honeywell RM7840L2026 is a microprocessor-based relay module designed for flame safeguard and burner management in commercial and industrial heating systems. Part of the Honeywell 7800 Series, this model includes a grounding pin for enhanced electrical connection and safety. It offers reliable sequencing, safety shutdown, and diagnostic functions for gas, oil, or combination burners.
Technical Specifications
- Model: RM7840L2026
- Series: 7800 Series
- Product Type: Flame Safeguard Relay Module
- Power Supply: 120V AC, 50/60 Hz
- Control Type: Burner on-off control
- Mounting: Q7800A subbase (required)
- Flame Amplifier Compatibility: R7847, R7848, R7849, R7851
- Flame Signal Input: UV, IR, or rectification depending on amplifier
- Field Flame Response Time (FFRT): Programmable
- Reset Type: Manual reset lockout
- Grounding Pin: Integrated for secure connection
- Status Indication: LED and optional remote display (S7830A)
- Condition: New
Key Features
- Advanced flame safeguard protection for industrial burners
- Built-in grounding pin enhances stability and signal integrity
- Modular plug-in design for fast replacement
- Compatible with multiple flame sensing technologies
- Real-time diagnostics and lockout history support troubleshooting
Compatible Accessories
- Q7800A Subbase
- R7847, R7848, R7849, R7851 Flame Amplifiers
- UV and IR flame detectors
- S7830A Keyboard Display Module
Industry Applications
- Boilers and forced draft burners
- Commercial and industrial heating systems
- Ovens, kilns, and incinerators
- Fuel-fired process heating equipment
Installation & Maintenance Notes
- Install only with compatible Q7800A subbase
- Verify all control circuit wiring matches burner specifications
- Use matched flame amplifier and detector for your system
- Inspect grounding pin and flame signal strength during commissioning
- Periodically review lockout history for maintenance planning
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