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- Honeywell
- RM7897A1002
- Burner Controller
- USA
- 127 x 127 x 133 mm
- 0.822 kg
- Xiamen, China
- New & In Stock
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Product Overview
The Honeywell RM7897A1002 is a microprocessor-based automatic primary burner controller from the Honeywell 7800 Series Burner Management System. It is designed for single-burner industrial combustion systems requiring non-recycling (selectable recycle/lockout) safety logic, flame supervision, ignition sequencing, and full combustion management.
It is commonly used in gas, oil, or combination fuel burners in industrial boilers, furnaces, kilns, and process heating equipment where high safety integrity and diagnostic capability are required.
Technical Specifications
| Parameter | Details |
|---|---|
| Manufacturer | Honeywell |
| Model | RM7897A1002 |
| Product Type | Burner Controller |
| Series | 7800 Series |
| Function | Automatic primary burner sequencing + flame safeguard control |
| Control Type | Microprocessor-based |
| System Role | Primary burner programmer/controller |
| Fuel Compatibility | Gas / Oil / Combination fuel |
| Flame Detection | Compatible with Honeywell flame amplifiers |
| Safety Logic | Selectable recycle or lockout operation |
| Special Features | Shutter drive output, configurable pilot timing |
| Operating Voltage | 120 VAC |
| Frequency | 50/60 Hz |
| Mounting Type | Plug-in module (Q7800 subbase required) |
| System Architecture | Modular (subbase + amplifier + purge card + display) |
| Dimensions | 127 × 127 × 133 mm |
| Weight | 0.822 kg |
Function and Working Principle
The RM7897A1002 operates as a full-cycle burner management controller within the Honeywell 7800 architecture.
Its key functions include:
- Automatic prepurge before ignition sequence
- Pilot ignition and main flame establishment control
- Continuous flame supervision via flame amplifier input
- Monitoring of burner safety interlocks (airflow, pressure, limits, etc.)
- Controlled burner run operation
- Postpurge after shutdown cycle
- Safety lockout or recycle depending configuration
- Fault detection with stored diagnostic history
A defining feature of this model is its enhanced safety logic flexibility, allowing configuration between recycle mode and lockout mode depending on system requirements.
Key Features
- Microprocessor-based burner sequencing and flame safeguard control
- Selectable recycle or lockout safety response
- Programmable pilot flame establishing period (typical 4 or 10 sec)
- Pre-ignition and post-purge control logic
- Shutter drive output support (for self-check UV systems)
- Continuous flame monitoring with amplifier modules
- LED sequence status indication
- Non-volatile memory for fault history retention
- Compatible with S7800 display/keyboard module
- Modular Honeywell 7800 Series architecture
Industrial Applications
- Industrial boilers
- Process furnaces
- Kilns and dryers
- Thermal oil heaters
- Gas/oil/dual-fuel combustion systems
- Single-burner industrial heating systems
Role in Industrial Systems
The RM7897A1002 serves as the central burner programmer/controller, responsible for:
- Safe burner startup sequencing
- Validation of all permissives before ignition
- Flame detection and supervision during operation
- Execution of controlled shutdown logic
- Fault handling with lockout or recycle behavior
- System diagnostics for maintenance and troubleshooting
Installation Notes
- Installed on Honeywell Q7800 series subbase
- Requires compatible flame amplifier module
- Requires purge timer module (ST7800 series depending configuration)
- Proper grounding and shielding required for flame signal stability
- Wiring must comply with industrial combustion safety standards
- Commissioning must be performed by qualified combustion technicians
Compatible Equipment
- Honeywell Q7800 subbases
- S7800A keyboard/display module
- ST7800 purge timer modules
- Flame amplifiers (R7847, R7852, etc.)
- UV / IR / flame rod detectors
- Burner valves and ignition systems
Advantages
- High-integrity industrial burner safety control
- Flexible recycle or lockout configuration
- Strong diagnostic and fault memory capability
- Modular architecture simplifies maintenance
- Widely used industrial combustion platform
Limitations
- Requires full Honeywell 7800 system ecosystem
- Cannot operate as a standalone controller
- Requires trained setup and commissioning
- Strictly designed for combustion applications
Conclusion
The Honeywell RM7897A1002 Burner Controller is a high-reliability industrial combustion safety module that manages burner sequencing, flame supervision, diagnostics, and safety shutdown functions within the Honeywell 7800 Series system.
It is specifically designed for applications requiring configurable safety behavior (recycle or lockout) and advanced burner control logic.