Description
RM7897A2002 On-Off Primary Control
Integrated Burner Control with Shutter Drive Output and Programmable Post Purge, 120 Vac
The RM7897A2002 is a microprocessor-based On-Off primary burner control designed for gas, oil, or combination fuel single burner applications. This control offers advanced sequencing and safety functionality, including programmable post purge, airflow switch checking, and shutter drive output. Post purge settings are configured using the optional S7800A1142 Keyboard Display Module.
Key Features
-
Integrated automatic burner sequencing and flame supervision
-
Programmable post purge via S7800A1142 display (not included)
-
Shutter drive output for additional combustion air control
-
Blinking LED fault annunciation with five-segment sequence display
-
Interchangeable plug-in flame amplifier support
-
Selectable recycle or lockout on airflow or flame loss
-
Local or remote system status and fault annunciation
-
Retains operating history and sequencing data in nonvolatile memory
-
Supports remote reset and optional PC interface
-
Compatible with expanded annunciator and COMBUSTION SYSTEM MANAGER™ software
Technical Specifications
| Specification | Value |
|---|---|
| Application | On-Off Primary Control |
| Voltage | 120 Vac |
| Flame Establishing Period | 4 or 10 seconds (pilot) |
| Interlocks | Selectable |
| Prepurge | Determined by ST7800A Purge Timer Card |
| Postpurge | Programmable via S7800A1142 |
| Shutter Drive Output | Yes |
| Delayed Main Valve | No |
| Memory | Nonvolatile |
| Reset Options | Local or optional remote |
| LED Indicators | 5 sequence LEDs, blinking fault code |
| Mounting | On Q7800A/B Subbase (required) |
| Display Support | S7800A1142 for post purge programming |
Required Components
-
Subbase: Q7800A or Q7800B Universal Wiring Subbase
-
Amplifier: R7847, R7848, R7849, R7851, R7852, R7861, or R7886
-
Purge Timer: ST7800A Plug-in Purge Timer Card
-
Display (optional): S7800A1142 for post purge setup
Common Applications
-
Industrial and commercial boilers
-
Process heating systems
-
Burner systems requiring post purge and shutter control
