
Utica-Dunkirk R3 PlugIn Relay
The Utica-Dunkirk R3 PlugIn Relay is a specialized switching component designed for reliable operation within residential and commercial boiler control systems. This SPST relay is engineered to handle the inductive loads typical of hydronic heating equipment, ensuring precise signaling between the thermostat, boiler circulator pumps, and the ignition module. With a compact plug-in design, it facilitates rapid field replacement on Utica and Dunkirk hydronic systems, minimizing downtime for technicians during emergency service calls. The R3 relay is built with high-grade contact materials to resist pitting and oxidation, maintaining low contact resistance over high-cycle operations. Whether you are troubleshooting a burner that fails to fire or diagnosing a circulator that stays energized, this replacement HVAC relay provides the exact electrical characteristics required by the original equipment manufacturer. It is a critical part for maintaining the safety sequence of the boiler, including proper voltage switching for the 24V control circuit or 120V line voltage applications.
Key Benefits:- OEM Compatibility: Specifically designed for Utica-Dunkirk boiler control boards and electrical distribution systems.
- Rapid Installation: The standardized plug-in mounting enables quick swaps without complex rewiring or specialized tools.
- Durable Switching: High switching capacity designed to withstand the inrush current of boiler circulators and secondary pumps.
- System Reliability: Enhances the efficiency of the heating system by ensuring stable electrical connections and fast response times.
- How do I know if the R3 relay is faulty? If the boiler has power but the burner or circulator fails to energize despite a call for heat, check for continuity across the relay contacts. A relay that clicks but doesn't close the circuit usually indicates oxidized or welded contacts.
- Will this relay work with other boiler brands? While designed for Utica and Dunkirk units, it may cross-reference with other HVAC relays. Always verify the pin configuration and voltage rating against the manufacturer’s schematic before installation.
- Is this relay used for low water cutoff (LWCO) integration? Yes, in many configurations, the R3 facilitates the signal interface between the low water cutoff and the burner circuit to safety-stop the system if water levels drop.
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Original: $101.37
-65%$101.37
$35.48Utica-Dunkirk R3 PlugIn Relay
The Utica-Dunkirk R3 PlugIn Relay is a specialized switching component designed for reliable operation within residential and commercial boiler control systems. This SPST relay is engineered to handle the inductive loads typical of hydronic heating equipment, ensuring precise signaling between the thermostat, boiler circulator pumps, and the ignition module. With a compact plug-in design, it facilitates rapid field replacement on Utica and Dunkirk hydronic systems, minimizing downtime for technicians during emergency service calls. The R3 relay is built with high-grade contact materials to resist pitting and oxidation, maintaining low contact resistance over high-cycle operations. Whether you are troubleshooting a burner that fails to fire or diagnosing a circulator that stays energized, this replacement HVAC relay provides the exact electrical characteristics required by the original equipment manufacturer. It is a critical part for maintaining the safety sequence of the boiler, including proper voltage switching for the 24V control circuit or 120V line voltage applications.
Key Benefits:- OEM Compatibility: Specifically designed for Utica-Dunkirk boiler control boards and electrical distribution systems.
- Rapid Installation: The standardized plug-in mounting enables quick swaps without complex rewiring or specialized tools.
- Durable Switching: High switching capacity designed to withstand the inrush current of boiler circulators and secondary pumps.
- System Reliability: Enhances the efficiency of the heating system by ensuring stable electrical connections and fast response times.
- How do I know if the R3 relay is faulty? If the boiler has power but the burner or circulator fails to energize despite a call for heat, check for continuity across the relay contacts. A relay that clicks but doesn't close the circuit usually indicates oxidized or welded contacts.
- Will this relay work with other boiler brands? While designed for Utica and Dunkirk units, it may cross-reference with other HVAC relays. Always verify the pin configuration and voltage rating against the manufacturer’s schematic before installation.
- Is this relay used for low water cutoff (LWCO) integration? Yes, in many configurations, the R3 facilitates the signal interface between the low water cutoff and the burner circuit to safety-stop the system if water levels drop.
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
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Description
The Utica-Dunkirk R3 PlugIn Relay is a specialized switching component designed for reliable operation within residential and commercial boiler control systems. This SPST relay is engineered to handle the inductive loads typical of hydronic heating equipment, ensuring precise signaling between the thermostat, boiler circulator pumps, and the ignition module. With a compact plug-in design, it facilitates rapid field replacement on Utica and Dunkirk hydronic systems, minimizing downtime for technicians during emergency service calls. The R3 relay is built with high-grade contact materials to resist pitting and oxidation, maintaining low contact resistance over high-cycle operations. Whether you are troubleshooting a burner that fails to fire or diagnosing a circulator that stays energized, this replacement HVAC relay provides the exact electrical characteristics required by the original equipment manufacturer. It is a critical part for maintaining the safety sequence of the boiler, including proper voltage switching for the 24V control circuit or 120V line voltage applications.
Key Benefits:- OEM Compatibility: Specifically designed for Utica-Dunkirk boiler control boards and electrical distribution systems.
- Rapid Installation: The standardized plug-in mounting enables quick swaps without complex rewiring or specialized tools.
- Durable Switching: High switching capacity designed to withstand the inrush current of boiler circulators and secondary pumps.
- System Reliability: Enhances the efficiency of the heating system by ensuring stable electrical connections and fast response times.
- How do I know if the R3 relay is faulty? If the boiler has power but the burner or circulator fails to energize despite a call for heat, check for continuity across the relay contacts. A relay that clicks but doesn't close the circuit usually indicates oxidized or welded contacts.
- Will this relay work with other boiler brands? While designed for Utica and Dunkirk units, it may cross-reference with other HVAC relays. Always verify the pin configuration and voltage rating against the manufacturer’s schematic before installation.
- Is this relay used for low water cutoff (LWCO) integration? Yes, in many configurations, the R3 facilitates the signal interface between the low water cutoff and the burner circuit to safety-stop the system if water levels drop.
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.












