Relay Module 120V Integrated Control with Communication, Annunciation, and Expanded Diagnostics
The Honeywell RM7898A1018 is a microprocessor-based primary burner control designed for automatically fired single-burner systems using gas, oil, or combination fuels. Built for advanced system diagnostics and integration, this model provides full burner sequencing, flame supervision, and safety lockout, with added support for communication modules, remote annunciators, and external data interfaces.
Technical Specifications
- Model: RM7898A1018
- Series: RM7800
- Voltage: 120V AC (+10%, -15%)
- Frequency: 50/60 Hz
- Application: On-Off Burner Control
- Pilot Type: Intermittent
- Flame Establishing Period – Pilot: 4 or 10 seconds
- Flame Establishing Period – Main: Intermittent
- PrePurge / PostPurge: Configurable via ST7800A Purge Timer
- Communication Support: Compatible with ControlBus and Modbus modules
- Annunciation Support: Compatible with S7830 Expanded Annunciator
- Run/Test Switch: Integrated 5-function switch
- LED Indicators: 5 LEDs for sequence step and fault display
- Mounting: Requires Q7800A or Q7800B Universal Subbase
- Flame Amplifier Compatibility: R7847, R7848, R7849, R7851, R7852, R7861, R7886
- Nonvolatile Memory: Retains operational history and lockout status
- Condition: New
Key Features
- Provides full burner sequencing, supervision, and safety shutdown
- Compatible with remote annunciation, data logging, and reset modules
- Designed for advanced system diagnostics and data communication
- Modular flame amplifier design allows flexibility in flame detection methods
- Nonvolatile memory stores lockout codes, cycle history, and flame data
- LEDs provide real-time feedback on burner sequence and error conditions
- Integrated Run/Test switch allows in-field configuration and verification
Compatible Accessories
- Q7800A / Q7800B Subbase
- ST7800A Plug-in Purge Timer
- R7847, R7848, R7849, R7851, R7852, R7861, R7886 Flame Amplifiers
- S7800A Keyboard Display Module
- S7830 Expanded Annunciator
- S7810 ControlBus or S7810M Modbus Communication Module
Industry Applications
- Industrial boilers and combustion systems
- Fuel-fired HVAC equipment
- Single-burner systems with remote monitoring and diagnostics
- High-availability burner management requiring integrated fault reporting
Installation & Maintenance Notes
- Ensure proper subbase and amplifier selection
- Use ST7800A module to configure purge timing
- Verify sequence and lockout conditions using onboard LEDs or display
- Monitor flame signal strength during startup and normal operation
- Regularly inspect wiring, sensors, and safety interlocks
Request a Quote now or call us at 1-800-755-2883 for expert assistance.