Advanced On-Off Primary Control for Single-Burner Applications
The Honeywell RM7897C1000 microprocessor-based integrated burner control provides comprehensive safety and sequencing functions for automatically fired gas, oil, or combination fuel single-burner systems . This primary control manages automatic burner sequencing, flame supervision, system status indication, and self-diagnostics . It requires a Q7800A or Q7800B universal wiring subbase, an appropriate plug-in flame signal amplifier, and an ST7800A plug-in purge timer card to complete the system .
The RM7897C1000 offers a programmable post-purge feature, configurable only with the S7800A1142 Keyboard Display Module . It includes a delayed main valve function for two-step firing (low-high-low) applications . The pilot flame establishing period is selectable at 4 or 10 seconds . This module includes a pre-ignition interlock (proof of closure) input and a shutter drive output .
The nonvolatile memory retains history files and sequencing status after power loss, preserving critical operational data . The power LED blinks fault codes on safety shutdown, aiding in rapid diagnosis . This module operates in a 0.5G vibration environment, making it suitable for demanding industrial settings .
Technical Specifications
| Parameter | Specification |
|---|---|
| Brand | Honeywell |
| Model | RM7897C1000 |
| Product Category | Primary Burner Control |
| Application | On-Off control for gas, oil, or combination fuel single-burner systems |
| Operating Voltage | 120 Vac (+10/-15%), 50/60 Hz (±10%) |
| Power Dissipation | 10W maximum |
| Maximum Connected Load | 2000 VA |
| Dimensions (W x H x D) | 127 mm x 127 mm x 133 mm (with Q7800A Subbase) |
| Weight | Approx. 0.9 kg (1 lb 15 oz) |
| Pilot Flame Establishing Period | Selectable 4 or 10 seconds |
| Prepurge | Determined by ST7800A Purge Timer Card |
| Postpurge | Programmable with S7800A1142 display module |
| Delayed Main Valve | Yes, for two-step firing applications |
| Pilot Type | Interrupted |
| Pre-ignition Interlock | Included |
| Vibration Rating | 0.5G environment |
| Ambient Operating Temp | -40°C to +60°C |
| Required Components | Q7800A/B Subbase, amplifier, ST7800A Purge Card |
The Honeywell RM7897C1000 features interchangeable plug-in flame amplifiers and supports both local or remote annunciation of operation and fault information . Selectable interlocks provide flexibility for different safety configurations. The airflow switch check feature verifies proper airflow before ignition. Users can select recycle or lockout behavior on loss of airflow or flame . The module offers a blinking LED fault annunciation feature on safety shutdown . For commissioning and troubleshooting, this control provides comprehensive diagnostic capabilities. The delayed main valve function supports two-step firing applications. When paired with the S7800A1142 Keyboard Display, it enables programmable post-purge times for enhanced operational flexibility.
Details
| Weight | 0.2 kg |
|---|---|
| Dimensions | 85 × 65 × 30 mm |
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