Overview
The RM7896D1027 is a microprocessor-based Honeywell burner control designed for automatically fired gas, oil, or combination-fuel single-burner systems. It provides pre-purge and post-purge sequences, interrupted-pilot ignition, dynamic airflow-switch testing, and full system diagnostics for maximum safety and reliability.
Features
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ON/OFF primary burner sequencing with automatic flame supervision
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Pre-purge and 60-second post-purge
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Interrupted pilot ignition
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Pilot flame establishing period selectable between 4 seconds or 10 seconds
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Main flame establishing time of 10 seconds
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Dynamic Airflow Switch (AFS) check
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Self-diagnostics with 5-LED status and sequence indicators
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Non-volatile memory retains fault history after power loss
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Lockout safety logic with detailed fault codes
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Wide environmental operating range for harsh industrial sites
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Accepts standard 7800 Series sub-bases and accessories
Specifications
| Application | On-Off Primary Control with Pre and Post purge |
| Dimensions (in.) | 5 in. wide x 5 in. high x 5 1/4 in. deep with Q7800A Subbase x 6 3/32 in. deep with Q7800B Subbase |
| Dimensions (mm) | 127 mm wide x 127 mm high x 133 mm deep with Q7800A Subbase x 155 mm deep with Q7800B Subbase |
| Weight (lb) | 1 lb 15 oz |
| Weight (kg) | 0.9 kg |
| Comments | Blinking Fault code LED, early spark termination when flame sensed, pre and post purge |
| Frequency | 50 Hz; 60 Hz (±10%) |
| Approvals, Underwriters Laboratories Inc. | Component Recognized, File No. MP268; Guide No. MCCZ. |
| Approvals, Canadian Standards Association | Certified, File No. LR95329-3. |
| Voltage | 120 Vac (+10, -15%) |
| Shipping and Storage Temperature Range (F) | -40 F to +140 F |
| Shipping and Storage Temperature Range (C) | -40 C to +60 C |
| Approvals, Federal Communications Commission | FCC Part 15, Class B, Emissions. |
| Flame Establishing Period – Pilot | 4 sec or 10 sec |
| Flame Establishing Period – Main | 10 sec |
| Interlocks | Selectable |
| PrePurge | Determined by ST7800A Purge Timer Card |
| PostPurge | 60 sec |
| Required Components | Q7800A,B Universal Wiring Subbases. R7847, R7848, R7849, R7851, R7852, R7861, or R7886 Flame Signal Amplifier. ST7800A Plug-in Purge Timer Card. |
| AirFlow Check | Dynamic |
| Delayed Main Valve | Yes |
| Pilot Type | interrupted |
| Vibration | 0.5 G environment |
| Approvals, Swiss RE | Acceptable |
| Approvals, Factory Mutual | Report No. OX4A5.AF. |
Applications
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Commercial and industrial single-burner systems
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Gas, oil, and combination-fuel burners
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Systems requiring thorough purge cycles and reliable flame supervision
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Replacement and retrofit upgrades in existing Honeywell 7800 Series setups
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Facilities needing advanced diagnostics and safety lockout capability
Benefits
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Improves safety with integrated pre/post purge sequences
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Fast troubleshooting via LED status display and stored fault history
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Withstands rugged industrial temperature ranges
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Flexible configuration supports a wide range of burner applications
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Modular design for quick maintenance and replacement
Reviews
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