The Honeywell RM7850A1001 is a microprocessor-based burner management control module designed for advanced combustion control in industrial and commercial heating systems. As part of the well-known Honeywell 7800 Series, this module provides reliable automatic burner sequencing, flame supervision, and system diagnostics for modulating gas, oil, or combination-fuel burners.
The controller integrates sophisticated safety logic and self-diagnostics to monitor ignition sequences and flame conditions continuously. With interchangeable plug-in flame amplifiers, LED status indicators, and non-volatile memory, the RM7850A1001 improves system transparency and simplifies troubleshooting during operation and maintenance.
Designed for demanding industrial environments, the module supports full-modulation burner applications, ensuring stable flame control and high safety standards in modern combustion systems.
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | RM7850A1001 |
| Brand | Honeywell |
| Series | 7800 Series |
| Product Type | Microprocessor Burner Management Control Module |
| Application | Full-modulation gas, oil, or combination fuel burners |
| Supply Voltage | 120 VAC (+10 % / −15 %), 50/60 Hz |
| Power Consumption | 10 W max |
| Pilot Flame Establishing Period | 3 s or 5 s (selectable) |
| Main Flame Establishing Period | 3 s, 5 s, or intermittent |
| Early Spark Termination | 5 s |
| Post-Purge Time | 2 s |
| Diagnostics | Five LED sequence indicators |
| Run/Test Switch | Five-function diagnostic switch |
| Memory | Non-volatile fault and lockout history |
| Operating Temperature | −40 °C to +60 °C |
| Required Accessories | Q7800 wiring subbase, R78xx flame amplifier, ST7800 purge timer |
| Dimensions (L × W × H) | 127 × 127 × 133 mm |
| Weight | 0.70 kg |
| Certifications | UL, CSA, FM, CE approvals |
The RM7850A1001 provides automatic burner sequencing, flame monitoring, and advanced system diagnostics, offering reliable combustion safety and operational stability.
Recommended Related Models
| Model | Description |
|---|---|
| Honeywell RM7840L1018 | Burner management control module |
| Honeywell RM7840L1026 | Single-burner combustion control module |
| Honeywell RM7840M1017 | Microprocessor burner safety controller |
| Honeywell RM7824A1006 | Flame relay and amplifier module |
| Honeywell R7847 | Flame signal amplifier |
Popular Honeywell Combustion Control Models
| Model | Product Type |
|---|---|
| Honeywell RM7800G1018 | Advanced burner control module |
| Honeywell RM7800M1011 | Maintenance burner controller |
| Honeywell S7800A1001 | Keyboard display module |
| Honeywell ST7800A | Plug-in purge timer card |
| Honeywell R7848 | Flame signal amplifier |
