The Honeywell R7847A1082 flame amplifier. 2 OR 3 SEC Flame FAILURE RESPONSE TIME. FOR USE W/C7012AC.
Overview
The R7847A1082 is a solid-state plug-in amplifier that senses flame via flame rods or compatible ultraviolet detectors. It provides an accurate flame failure response and integrates with safety control relay modules in burner systems.
Key Features
Flame Failure Response Time (FFRT): selectable 2.0 or 3.0 seconds
Flame Signal Measurement: 0.0 to 5.0 Vdc via test jacks for monitoring flame strength
Detection Compatibility: Use with rectifying flame rods (e.g. C7004, C7005, C7007, C7008, C7009, Q179) and suitable UV flame sensors
Relay Module Compatibility: Designed to plug into Honeywell 7800 and R7140 Series relay modules via a keyed edge connector
Color-Coded Label: Green label to indicate rectification-type amplifier for easy identification
Durable Operating Conditions: Wide temperature range and humidity rating
Technical Specifications
| Specification | Detail |
|---|---|
| Model Number | Honeywell R7847A1082 |
| Flame Failure Response Time | 2.0 or 3.0 seconds |
| Flame Signal Voltage Range | 0.0 – 5.0 Vdc |
| Minimum Acceptable Signal | ~1.25 Vdc from flame rod under proper conditions |
| Detection Type | Rectification (rod or UV) |
| Compatible Flame Sensors | Rectifying rods like C7004, C7005, C7007, C7008, C7009, Q179; also UV sensors where applicable |
| Primary Safety Control | Honeywell 7800 Series relay modules / R7140 Series modules |
| Label Color | Green |
| Operating Temperature | -40°F to +140°F (-40°C to +60°C) |
| Storage Temperature | -40°F to +150°F (-40°C to +65°C) |
| Humidity Rating | Up to 85% RH, non-condensing |
| Environmental / Mechanical | Vibration tolerance; solid-state plug-in design |
Applications
Industrial and commercial burner safety systems
Gas, oil, or mixed-fuel burners using flame rod or UV flame detectors
Replacement or maintenance of 7800 / R7140 Series relay module control systems
Situations where reliable flame monitoring at moderate response times is needed
Benefits
Flexible safety margin with two FFRT options (2.0 or 3.0 seconds)
Clear flame strength monitoring via test jacks and voltage reading
Easy installation / replacement via plug-in keyed connector
Solid-state durability for harsh environments
Simplified maintenance with green color label for quick identification




















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