Johnson Controls SET29A-623R Sensing Element

The Johnson Controls SET29A-623R is a high-precision replacement sensing element engineered for field service on thermal expansion valves. Designed specifically for compatibility with 3/8" valves, this power assembly ensures accurate superheat control and refrigerant metering across a temperature range of 160 to 230 degrees. This component features a robust diaphragm and capillary tube assembly optimized for durability in high-demand HVACR environments. When troubleshooting hunting or erratic superheat, replacing the thermal expansion valve power head with a genuine SET29A-623R restores system equilibrium and prevents liquid slugging. Its precise calibration facilitates optimal evaporator performance and system efficiency. Contractors rely on the SET29A-623R temperature sensor for its consistent pressure-temperature response, ensuring that the HVAC expansion valve sensing element reacts accurately to load changes. Utilizing Johnson Controls replacement parts ensures that the valve body maintains its original design specifications without requiring a full valve replacement.

• Direct Compatibility: Precision-fit for 3/8" valve bodies, eliminating the need for extensive piping modifications during field repairs.
• Specific Temperature Calibration: Optimized for 160-230°F applications, providing reliable feedback for high-temperature refrigeration and specialized HVAC cycles.
• Cost-Effective Maintenance: Allows for the replacement of the thermal power element rather than the entire valve body, reducing labor time and material costs.
• Enhanced System Stability: Promotes stable superheat regulation, protecting the compressor from liquid floodback and improving overall system longevity.
• Durable Construction: Built to withstand commercial duty cycles and vibration common in industrial HVACR systems.

Can the SET29A-623R be used on larger valve bodies?
No, this specific sensing element is designed for 3/8" valve configurations. Attempting to install it on mismatched valve bodies will result in improper seating and potential refrigerant leaks.

Is this element compatible with all refrigerant types?
Compatibility depends on the specific valve body and refrigerant charge. Verify that the R-P curve of this 160-230 degree element aligns with your system's refrigerant pressure characteristics before installation.

How do I ensure a proper seal during installation?
Ensure the valve body flange is clean and free of debris. Use a torque wrench to meet manufacturer specifications, preventing diaphragm distortion or gasket failure.

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.