Reznor 151197 Overload

When you're servicing Reznor unit heaters or radiant tube systems, the Reznor 151197 Overload—also cataloged as the RZ151197 Overload Relay—is a critical safety component for protecting blower motors and integrated electrical circuits. This authentic Reznor OEM replacement part is engineered to monitor current draw across a specific 17.5 to 22 Amp range, providing a necessary failsafe against field issues like phase loss, mechanical binding, or circuit spikes. Rated for 208/230 Volt configurations, this bimetallic overload relay ensures that the system interrupts power before excessive heat leads to permanent motor winding failure or hazardous operating conditions.

As a veteran tech, you know that using genuine Reznor heating parts is the only way to ensure the trip curve matches the original factory specifications. Non-spec substitutes often lead to nuisance tripping or, worse, delayed response times that can cook a motor. The Reznor 151197 features a compact, panel-mount design that integrates directly into the existing control architecture of compatible Reznor industrial and commercial heaters. Replacing a fouled HVAC overload relay with this exact OEM thermal overload allows for precise restoration of the system's safety parameters and maintains the engineering integrity of the equipment.

• Precise Current Monitoring: Calibrated for 17.5-22 Amp operation to protect against overcurrent and thermal damage.
• Voltage Compatibility: Designed for standard 208V/230V commercial electrical service.
• Direct OEM Fit: Drop-in replacement for Reznor part 151197, ensuring no field modifications are required.
• System Protection: Acts as a primary defense for expensive blower motors in high-demand heating environments.

What causes a Reznor 151197 overload to trip repeatedly?
Repeated tripping usually indicates a motor drawing excessive amperage, which can be caused by worn bearings, a failing start capacitor, or restricted airflow. Always verify the motor's nameplate FLA (Full Load Amps) against the relay setting.

Can I use this relay on a 460V system?
No, the Reznor 151197 is specifically rated for 208/230V applications. Using it outside of its rated voltage can lead to component failure or unsafe operating conditions.

How do I verify if this is the correct replacement for my heater?
Confirm the part number in your unit's technical manual. This relay is commonly found in large-scale Reznor unit heaters and radiant tube models where precise electrical protection is required for 17.5-22A loads.

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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.