وصف
Description
The Honeywell RM7895A1014 is a microprocessor-based, on/off primary burner management controller designed for industrial combustion systems. It provides essential sequencing, flame supervision, and safety interlocking for boiler plants, furnace burner trains, refinery heaters, and packaged combustion skids. The unit manages the complete burner startup and shutdown cycle, including safe-start checks, prepurge timing, pilot ignition, flame proving, and main burner fuel valve control. By enforcing strict safety interlocks and fail-safe lockout protocols, the RM7895A1014 ensures reliable operation and reduces downtime in critical combustion applications.
Features
- Microprocessor-based logic for deterministic burner sequencing.
- Integrated prepurge sequencing functionality (requires ST7800A purge timer card).
- Supports a wide range of 7800 series flame signal amplifiers (UV and IR).
- Configurable pilot flame establishing time (4 or 10 seconds).
- Fail-safe lockout behavior upon detection of abnormal combustion or interlock failure.
- Plug-in design compatible with Q7800A and Q7800B universal wiring subbases for rapid maintenance.
Applications
This controller is widely utilized in industrial environments requiring precise flame safety and automated burner management, including:
- Industrial boiler and steam generation systems.
- Furnace and oven burner trains.
- Refinery and petrochemical process heaters.
- Packaged combustion skids and thermal oxidizers.
Technical Specifications
| Model |
RM7895A1014 |
| Supply Voltage |
120 Vac (+10%, -15%) |
| Frequency |
50/60 Hz (+/- 10%) |
| Operating Temperature |
-40 degC to +60 degC |
| Flame Establishing Time |
4 sec or 10 sec (Pilot) |
| Mounting |
Q7800A/Q7800B Subbase |
| Vibration Rating |
0.5 G |
Installation Guidelines
- Ensure the system power is disconnected before installing or removing the module from the subbase.
- The module must be installed in a location protected from excessive moisture, heat, and corrosive atmospheres.
- Verify that the universal wiring subbase (Q7800A/B) is correctly wired and grounded according to the system schematic before inserting the controller.
- Ensure all flame sensor wiring is shielded and routed away from high-voltage ignition cables to prevent signal interference.
- Perform a full functional test of all interlocks (pressure switches, airflow switches, and fuel valves) after installation to confirm proper safety operation.
Compliance and Certifications
The RM7895A1014 meets various international safety standards, including UL (MP268 MCCZ), CSA (LR95329-3), FM (OX4A5.AF), and FCC Part 15 Class B. It is also compliant with CSD-1 and Swiss Re requirements.
FAQ
Is this module compatible with existing 7800 series wiring?
Yes, the RM7895A1014 is designed for direct plug-in compatibility with standard Q7800A and Q7800B universal wiring subbases, allowing for seamless integration into existing 7800 series architectures.
What flame amplifiers can be used with this controller?
This module supports the standard 7800 series flame signal amplifiers, including models R7847, R7848, R7849, R7851, R7852, R7861, and R7886.
