Beacon-Morris 11J28-06881 Unit Heater Control Board – OEM Replacement (11J28R06881 / J28R06881).
Product Overview
Restore reliable heating control in your Beacon-Morris unit heater with the Beacon-Morris 11J28-06881 Control Board, the direct OEM replacement for the discontinued J28R06881 model. Specifically engineered for the BRT, BTU, BRU, and BST series unit heaters, this upgraded control board features enhanced diagnostics and simplified installation for improved performance in commercial and residential garage heaters and HVAC systems.
With updated design modifications that remove unnecessary cooling relays and a new external LED diagnostic wire, the 11J28-06881 board is purpose-built for unit heaters that operate solely in heating mode. Whether you're repairing a malfunctioning system or replacing an outdated part, this control board ensures your Beacon-Morris heater runs efficiently and reliably.
Features & Benefits
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Updated Design: Replaces the obsolete J28R06881 model with modern upgrades and simplified wiring.
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No Cooling Relay: Optimized for heating-only operation—ideal for garages, workshops, and commercial spaces.
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External LED Diagnostic Light: Includes a 20” wire for optional external mounting to improve serviceability.
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Plug-and-Play Compatibility: Fits seamlessly into Beacon-Morris BRT, BTU, BRU, and BST series unit heaters.
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OEM Quality: Manufactured to original specifications for maximum compatibility and performance.
Specifications
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Model Number: 11J28-06881 (Replaces: 11J28R06881, J28R06881)
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Series Compatibility:
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BRT030 – BRT120
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BTU-30 – BTU-400
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BRU-30 – BRU-400
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BST-30 – BST-400
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LED Indicator: 20” wire for external mounting (lock nut included)
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Terminal Redesign: Fan wires now connect to "ACC1"; jumper no longer needed
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No Mechanical Cooling Mode: Specifically for heating-only units
Installation Tips
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Power Down First: Always turn off power to the unit before beginning installation.
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Wire Mapping: Fan motor wires now connect to ACC1 terminals—no jumper needed between ACB Heat/Cool.
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External LED Option: For easier diagnostics, mount the included LED on the outer panel of the unit.
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Drill an 11/16” hole and use the supplied lock nut for secure placement.
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Ensure wire is kept away from burner components for safety.
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Internal LED Option: If not mounting externally, position LED in a safe location within the electrical compartment.
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For Best Visibility:
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On tubular duct and low-profile units, front panel mounting is ideal.
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For other tubular models, mount on the bottom of the electrical compartment.
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FAQs
Q: Is this a direct replacement for the old J28R06881 board?
A: Yes. The 11J28-06881 is the updated OEM replacement and fits the same Beacon-Morris models.
Q: What’s different about the new board?
A: It eliminates the cooling relay (not needed for unit heaters) and includes a longer LED wire for easier troubleshooting.
Q: Do I need to use the jumper wire like before?
A: No jumper is required with this updated design. Fan motor wires go to ACC1 terminals.
Q: Can I install this control board myself?
A: If you're experienced with HVAC wiring, yes. For safety, a licensed technician is recommended.
Q: Where should I mount the diagnostic LED?
A: Externally on the front or bottom panel (depending on unit type), or inside the electrical compartment.
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