RM7890A1056 | Honeywell Relay Module for HVAC Burners
Manufacturer: Honeywell
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Part Number: RM7890A1056
Condition：New with Original Package
Product Type: Burner Control Relay Module
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Country of Origin: USA
Payment:T/T, Western Union
Shipping port: Xiamen
Warranty: 12 months
Product Description
Overview
The Honeywell RM7890A1056 is a microprocessor-based burner control relay module designed for Honeywell 7800 Series systems. It manages on/off gas burner operations with safe startup, flame monitoring, and shutdown functions. Moreover, the plug-in module integrates seamlessly with optional Keyboard Display Modules (KDM) for programming and diagnostic monitoring.
Technical Specifications
| Specification | Details |
|---|---|
| Model / Part Number | RM7890A1056 |
| Type | Burner Control Relay Module |
| Series | Honeywell 7800 Series |
| Control Type | Microprocessor-based integrated burner control |
| Fuel Supported | Gas burners (single burner, on/off operation) |
| Functions | Automatic sequencing, flame supervision, system status, self-diagnostics |
| Pilot Options | Selectable intermittent or interrupted pilot |
| Preignition Interlock Input | Supported |
| Run/Test Switch | Available for interrupted pilot setup |
| Compatible Amplifiers | UV, IR, or rectification flame amplifiers |
| Flame Failure Response Time (FFRT) | Configurable, typically 0.8–3.0 seconds |
| Operating Voltage | 120 VAC or 230 VAC (depending on subbase) |
| Ambient Operating Temperature | –40 °C to +60 °C |
| Mounting | Plug-in to 7800 Series subbase |
| Dimensions | 5 × 5 × 5 in |
| Certifications | UL, CSA, FM, CE compliant |
| Options | KDM, remote display mounting, purge card, annunciator modules |
| Weight | 2.75 lbs |
| Warranty | Factory warranty may not apply, Radwell 2-year warranty included |
FAQ
Q1: What types of burners does the RM7890A1056 support?
A1: It is designed for single on/off gas burners in industrial or commercial HVAC systems.
Q2: Can it work with different flame amplifiers?
A2: Yes, it supports UV, IR, or rectification amplifiers depending on the application.
Q3: How is flame failure handled?
A3: Flame failure response time is configurable, typically between 0.8 and 3.0 seconds.
Q4: Does it include diagnostic tools?
A4: Yes, it has built-in self-diagnostics, system status indicators, and troubleshooting features.
Q5: What are the safety certifications?
A5: The module is UL, CSA, FM, and CE compliant, ensuring industrial safety standards.