Overview
The Honeywell RM7838C1004 is a semi-automatic programming burner control designed for industrial and commercial combustion systems. It’s part of Honeywell’s 7800-series family and supports safe sequencing for ON/OFF burner applications with flame supervision and diagnostics.
Features
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Semi-automatic ON/OFF burner control for pilot ignition systems
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Modular design: plug-in control module compatible with standard wiring sub-bases
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LED status indicators for sequence steps and fault detection
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Non-volatile memory retains lockout history after power loss
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Selectable pilot flame establishing time and main flame establishing period
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Built-in interlock support for airflow, ignition failure and flame loss
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Rugged construction suitable for industrial burner environments
Specifications
| Application | Semi Automatic Programming Control |
| 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 10 oz |
| Weight (kg) | 0.7 kg |
| Comments | Includes S7800 Display |
| Item Type | Product |
| 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 | Intermittent |
| Interlocks | Running |
| PrePurge | Determined by ST7800A Purge Timer Card |
| Required Components | Q7800A,B Universal Wiring Subbases. R7847, R7848, R7849, R7851, R7852, R7861, or R7886 Flame Signal Amplifier. ST7800A Plug-in Purge Timer Card. |
| Pilot Type | intermittent |
| Vibration | 0.5 G environment |
| Approvals, Control Safety Devices | Acceptable: CSD-1 |
| Approvals, Swiss RE | Acceptable |
| Approvals, Factory Mutual | Report No. OX4A5.AF. |
Applications
This control unit is used where safe ignition sequencing, flame monitoring and automatic shutdown are required, including:
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Industrial boilers and furnaces
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Process heating systems
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Burner systems with manual start or pilot ignition
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Retrofitting older burners for improved safety and monitoring
Benefits
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Delivers integrated flame supervision and fault diagnostics in one module
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Non-volatile memory and LEDs enhance serviceability and fault traceability
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Modular plug-in design reduces downtime and simplifies replacement
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Suitable for a wide range of commercial and industrial burner applications
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Robust design built for harsh burner environments
Reviews
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