Integrated Microprocessor-Based System with Programmable Post Purge
The Honeywell RM7897A2002 is a microprocessor-based primary burner control designed for automatically fired single-burner systems using gas, oil, or combination fuels. This full-function relay module delivers reliable burner sequencing, flame supervision, and advanced diagnostics. It features programmable post-purge capability using the S7800A1142 display and supports a wide range of flame amplifiers and safety options for comprehensive burner management.
Technical Specifications
- Model: RM7897A2002
- Series: RM7800
- Product Type: Integrated Primary Burner Control
- Fuel Compatibility: Gas, Oil, or Combination
- Burner Type: Single Burner, Automatically Fired
- Flame Establishing Period – Pilot: 4 or 10 Seconds
- Purge Timing:
- Pre-Purge: Set by ST7800A purge timer card
- Post-Purge: Programmable via S7800A1142 Display Module
- Interlocks: Selectable
- Airflow Switch Check: Included
- Shutter Drive Output: Supported
- Reset Type: Optional remote reset
- History Storage: Nonvolatile memory
- Status Display: 5 LEDs for sequence and fault indication
- Fault Indication: Blinking power LED with fault code
- Mounting: Requires Q7800A Subbase
- Condition: New
Key Features
- Microprocessor-based sequencing and flame monitoring
- Programmable post purge when used with S7800A1142 display
- Interchangeable plug-in flame amplifiers
- Blinking LED fault annunciation and full diagnostic support
- Local or remote annunciation and reset capabilities
- Nonvolatile memory retains history after power loss
- PC interface and reporting options available
- Selectable recycle or lockout on airflow/flame loss
Compatible Accessories
- Q7800A Subbase
- S7800A1142 Keyboard Display Module
- R7847, R7848, R7849, R7851 Flame Amplifiers
- ST7800A Purge Timer Card
- Flame rods, UV and IR flame scanners
- DATA CONTROLBUS™ and COMBUSTION SYSTEM MANAGER™ software
Industry Applications
- Industrial boilers and furnaces
- Commercial heating plants
- Process burner systems
- Fuel-fired HVAC and manufacturing applications
Installation & Maintenance Notes
- Install with compatible subbase and amplifier
- Use S7800A1142 for post-purge configuration
- Verify correct interlock and purge card setup
- Monitor LED indicators for sequence and diagnostics
- Use Honeywell tools or software for advanced configuration and reporting