Technical Overview
The Honeywell RM7895C1012 is a microprocessor-based on-off primary control with integrated pre-purge timing for single-burner systems. This relay module manages automatic burner sequencing and flame supervision for gas, oil, or combination fuel applications. It provides a level of safety and functional capability beyond conventional controls. The system requires several additional components for complete operation: a Q7800 wiring subbase, a compatible plug-in flame amplifier, and an ST7800 purge timer card. Five LEDs on the front panel provide clear sequence status information. A non-volatile memory retains fault history and lockout status even after a complete power loss. The module allows selectable pilot flame establishing periods of 4 or 10 seconds. This flexibility accommodates various burner configurations with ease.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Honeywell |
| Model Number | RM7895C1012 |
| Product Type | On-Off Burner Control / Relay Module |
| Voltage | 120 Vac (+10/-15%), 50/60 Hz (±10%) |
| Power Dissipation | 10 W maximum |
| Maximum Connected Load | 2000 VA |
| Fuse Rating | 15 A maximum, Type SC fast-blow or equivalent |
| Control Type | On-Off with Pre-Purge |
| Pilot Type | Interrupted |
| Pilot Flame Establishing Period | 4 or 10 seconds (selectable) |
| Main Flame Establishing Period | 10 seconds |
| Post-Purge | 15 seconds |
| Pre-Purge | Determined by ST7800A Purge Timer Card (2 sec to 30 min) |
| Flame Failure Response Time | 0.8 or 3.0 seconds (depends on amplifier) |
| Interlocks | 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) |
| Humidity Rating | 85% RH continuous, noncondensing |
| Vibration Tolerance | 0.5G continuous |
| Weight | 0.9 kg (approx. 2.0 lbs) |
| Mounting Dimensions | 127 x 127 x 133 mm (with Q7800A) or 127 x 127 x 155 mm (with Q7800B) |
| Safety Approvals | UL Listed, CSA Certified, FM Approved, IRI Acceptable, SIL 3 capable |
| Country of Origin | USA |
Key Features
Microprocessor-Based Control – The advanced processor delivers precise burner sequencing and comprehensive flame supervision for demanding combustion applications.
On-Off with Pre-Purge Function – The integrated pre-purge timing ensures safe chamber clearing before ignition, thereby preventing hazardous conditions.
Selectable Flame Establishing Period – Users can choose 4 or 10 seconds for the pilot flame establishing period, offering application flexibility.
Non-Volatile Memory – The module retains history files and lockout status after power loss, ensuring data persistence for troubleshooting.
System Diagnostics – Built-in self-diagnostics and troubleshooting capabilities simplify fault identification and reduce maintenance time.
Visual Status Indication – Five LEDs provide clear sequence information, enabling quick operational assessment.
Interchangeable Amplifiers – Plug-in flame amplifiers simplify field replacement and customization for different flame detection needs.
Optional Modules – The module supports PC interface, keyboard display module, Data ControlBus™ Module, remote display, and expanded annunciator.
Required Components
The Honeywell RM7895C1012 requires several separately purchased components: a Q7800A or Q7800B Universal Wiring Subbase, a compatible plug-in flame signal amplifier, and an ST7800A Plug-in Purge Timer Card.
Applications
This burner controller excels in industrial combustion management for boilers, process furnaces, kilns, and heaters. It is particularly well-suited for power generation facilities, chemical processing plants, and manufacturing environments where on-off burner sequencing with pre-purge is required.
Details
| Weight | 0.2 kg |
|---|---|
| Dimensions | 85 × 65 × 30 mm |
Reviews
There are no reviews yet.