RM7800G1018 Honeywell Relay Module S7800 Burner Control - In Stock

Global PLC Spare HUB's Insight

• The RM7800G1018 serves as a cornerstone for microprocessor-based burner management, delivering advanced primary safety and control.
• This Honeywell 7800 Series module integrates automatic sequencing with robust flame supervision to prevent hazardous combustion conditions.
• Engineers value the RM7800G1018 for its nonvolatile memory, which preserves critical lockout history even during total power loss.
• The inclusion of the Keyboard Display Module (KDM) allows for immediate onsite diagnostics and system configuration without external tools.

Core Technical Parameters

• Manufacturer: Honeywell
• Model Number: RM7800G1018
• Device Type: Microprocessor Programming Control
• Operating Voltage: 120 Vac (+10, -15%) at 50/60 Hz frequency.
• Control Logic: LHL-LF (Low Heat Lockout - Low Fire) Proven Purge sequence.
• Post-Purge Timing: Fixed at 15 seconds for safety clearance.
• Flame Establishing Period: Selectable Pilot (4/10 sec) and Main (10/15 sec) timings.
• Early Spark Termination: Standardized at 5 seconds for precise ignition control.
• Environmental Rating: Resists vibrations up to 0.5 G in industrial environments.
• Weight: Compact design at 1 lb 10 oz (0.7 kg) for easy subbase mounting.

System Diagnostics & Diagnostics Ability

• Visual Feedback: Provides sequence status through five integrated LEDs (Power, Pilot, Flame, Main, Alarm).
• Fault Retention: Tracks and stores specific lockout codes, assisting technicians in rapid troubleshooting.
• Test Functionality: Features a 5-function Run/Test switch to allow manual checking of the ignition and pilot valves.
• Electrical Access: Includes front-facing access points for external voltage checks without disconnecting the module.
• Self-Diagnostics: Performs continuous internal checks to detect component failure within the RM7800G1018 hardware.

Industrial Applications & Hardware Compatibility

• Burner Sequencing: Designed for automatic gas, oil, or combination fuel burner applications.
• Required Infrastructure: Must be paired with Q7800A or Q7800B universal wiring subbases.
• Flame Detection: Fully compatible with R7847, R7848, R7849, R7851, and R7861 flame signal amplifiers.
• Customizable Purge: Utilizes ST7800A plug-in purge timer cards to meet specific boiler or furnace requirements.
• Operational Environments: Suitable for commercial and industrial heating systems requiring UL-certified safeguards.

Strategic FAQ & Purchasing Guide

• How do I change the prepurge timing on the RM7800G1018?
• The timing is not programmed in the module itself; you must install a specific ST7800A Purge Timer Card into the module.
• What does "LHL-LF Proven Purge" mean for my system startup?
• It ensures the system initiates prepurge at high fire (if configured) but requires a return to the low fire position before ignition.
• Selection Tip: Can I upgrade an older R4140 series to the RM7800G1018?
• Yes, the 7800 series is the standard upgrade path, but you must replace the old subbase with a Q7800 series base.
• Why is the Keyboard Display Module (KDM) included in this package?
• The S7800 display is essential for reading the detailed fault codes and sequence timing provided by the RM7800G1018 logic.
• Experience Note: How should I handle a frequent "Flame Signal" lockout?
• First, check the plug-in amplifier and flame detector alignment; the RM7800G1018 diagnostics will tell you the exact signal strength.

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