Intelligent Flame Supervision for Commercial Burner Systems
The Honeywell RM7840L1075 automatic programming control delivers advanced flame supervision for commercial and industrial combustion equipment. This microprocessor-based unit manages the complete burner startup, operation, and shutdown sequences automatically. The controller integrates with the 7800 SERIES relay module and mounts on a Q7800 subbase. It supports both intermittent and interrupted pilot ignition configurations. The unit provides dynamic self-checking and first-out annunciation for rapid diagnostics. Consequently, it reduces troubleshooting time and enhances system reliability.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Honeywell |
| Product Type | Automatic Programming Control |
| Power Supply | 120 Vac (+10%/-15%), 50/60 Hz |
| Power Consumption | 10 W maximum |
| Maximum Connected Load | 2000 VA |
| Flame Sensor Compatibility | Rectification, UV scanner, PNR, PNP |
| Pilot Modes | Intermittent or interrupted (selectable) |
| Operating Temperature | -40°C to +60°C (-40°F to +140°F) |
| Storage Temperature | -40°C to +66°C (-40°F to +150°F) |
| Dimensions | 12.7 × 12.7 × 13.3 cm (5 × 5 × 5.25 in) |
| Weight | Approximately 0.82 kg (1.8 lb) |
| Mounting | Q7800 subbase (required) |
| Safety Certification | SIL 3 Capable |
Diagnostic Intelligence and Safety Features
The Honeywell RM7840L1075 performs dynamic relay tests before every burner cycle. Extended safe-start checks verify all safety circuits and flame detection integrity. Nonvolatile memory retains fault history during power interruptions. First-out annunciation identifies the initial cause of system shutdown events. These diagnostic capabilities facilitate fast and effective maintenance interventions.
Application Versatility and System Integration
The Honeywell RM7840L1075 handles gas, oil, or combination fuel firing applications. The optional Keyboard Display Module provides local programming and status monitoring. The optional Data ControlBus™ Module enables remote system communication and reset. The RM7840L1075 replaces earlier RM7840 versions with upgraded software features.
Details
| Weight | 0.2 kg |
|---|---|
| Dimensions | 85 × 65 × 30 mm |
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