On-Off Flame Safeguard with Prepurge and Intermittent Pilot
The Honeywell RM7895A1030 is a microprocessor-based primary burner control built for on-off burner systems using gas, oil, or combination fuels. Designed in collaboration with Fulton, this control module provides flame safeguard, burner sequencing, and diagnostic functionality in a modular, reliable format. It supports prepurge timing, intermittent pilot operation, and advanced system status indication with nonvolatile memory for enhanced system insight.
Technical Specifications
- Model: RM7895A1030
- Series: RM7800 (Fulton Edition)
- Application: On-Off Primary Burner Control with Prepurge
- Voltage: 120V AC (+10%, -15%)
- Frequency: 50/60 Hz (±10%)
- Flame Establishing Period – Pilot: 4 or 10 seconds (limited)
- Flame Establishing Period – Main: Intermittent
- PrePurge: Determined by ST7800A Purge Timer Card
- Pilot Type: Intermittent
- Delayed Main Valve: No
- Interlocks: Selectable
- Airflow Switch Check: Included
- Used With: R7847, R7849 Flame Amplifiers
- Required Components:
- Q7800A or Q7800B Universal Wiring Subbase
- ST7800A Purge Timer Card
- Compatible Flame Amplifier (R7847, R7848, R7849, R7851, R7852, R7861, R7886)
- Weight: 1 lb 15 oz (0.9 kg)
- Dimensions (with Q7800A): 5″ W x 5″ H x 5-1/4″ D
- Dimensions (with Q7800B): 5″ W x 5″ H x 6-3/32″ D
- Vibration Tolerance: 5 G environment
- Temperature Range (Storage/Shipping): -40°F to +140°F (-40°C to +60°C)
- Condition: New
Key Features
- Automatic burner sequencing, flame supervision, and system lockout
- Prepurge capability controlled by ST7800A module
- Interchangeable flame amplifiers for flexible detection options
- Five LEDs indicate burner sequence and system status
- Optional keyboard display, remote display, or annunciator integration
- Nonvolatile memory stores history and sequence after power loss
- Selectable relight or lockout on flame loss
- Optional remote reset and PC interface options
Compatible Accessories
- Q7800A or Q7800B Subbase
- ST7800A Plug-in Purge Timer
- R7847, R7849, and other Honeywell Flame Amplifiers
- S7800A Keyboard Display Modules
- DATA CONTROLBUS™ and COMBUSTION SYSTEM MANAGER™ Modules
Industry Applications
- Fulton boilers and packaged burner systems
- Industrial combustion systems
- Commercial heating plants
- Fuel-fired ovens and kilns
Installation & Maintenance Notes
- Install with correct subbase and amplifier module
- Confirm purge time with ST7800A card
- Use with compatible flame rods or sensors
- Monitor operation using LED indicators or display module
- Review last lockouts and operating hours from memory