Honeywell RM7800L1087 Relay Module Burner Control

The Honeywell RM7800L1087 Relay Module is a microprocessor-based integrated burner control designed for automatically fired gas, oil, coal, or combination fuel single burner applications. This module enhances safety and functionality, offering advanced features that surpass conventional controls. It ensures precise and reliable operation, optimizing burner performance while maintaining high safety standards. The RM7800L1087 is essential for modern burner management systems, providing comprehensive control and monitoring capabilities to improve efficiency and safety in industrial heating applications. Its microprocessor technology and robust design make it a critical component for any advanced burner control system.

Technical Specifications

• Model: RM7800L1087
• Series: RM7800
• Voltage: 120V AC (+10%, -15%)
• Frequency: 50/60 Hz
• Application: Automatically Fired Single-Burner Systems
• Pilot Type: Intermittent
• Flame Establishing Period – Pilot: 4 or 10 seconds
• Flame Establishing Period – Main: Intermittent
• PrePurge / PostPurge: Configured via ST7800A Plug-in Timer
• Grounding Pin: Included for reliable installation connection
• Airflow Switch Check: Supported
• Interlocks: Selectable
• Run/Test Switch: 5-position for functional testing and diagnostics
• Mounting: Requires Q7800A or Q7800B Universal Subbase
• Flame Amplifier Compatibility: R7847, R7848, R7849, R7851, R7852, R7861, R7886
• LED Indicators: 5 sequence status LEDs
• Nonvolatile Memory: Retains lockout, flame signal strength, and cycle history
• Condition: New

Key Features

• Fully integrated burner sequencing and flame safeguard functionality
• Compatible with Honeywell UV, IR, and flame rod flame amplifiers
• Grounding pin included for secure electrical connectivity
• Modular design with support for remote display, annunciation, and reset
• LED indicators provide real-time sequence and fault code feedback
• Nonvolatile memory stores operational data for analysis and maintenance
• 5-position Run/Test switch supports commissioning and service diagnostics

Compatible Accessories

• Q7800A / Q7800B Universal Subbases
• ST7800A Plug-In Purge Timer
• R7847, R7848, R7849, R7851, R7852, R7861, R7886 Flame Amplifiers
• S7800A Keyboard Display Module
• S7810 Communication Modules
• S7830 Expanded Annunciator

Industry Applications

• Commercial and industrial burner systems
• Fuel-fired HVAC and process equipment
• Boilers requiring reliable flame monitoring and control
• Facilities with integrated burner safety and fault logging systems

Installation & Maintenance Notes

• Mount to correct Honeywell subbase and confirm grounding pin connection
• Set purge timing with ST7800A timer module
• Monitor sequence status via LEDs or remote display
• Inspect and test flame signal using proper amplifier and sensor
• Review stored lockout history during routine service