Antunes Controls 8503130033 Limit Controller

The Antunes Controls 8503130033 is a high-performance 115Vac TFH Series High/Low Temperature Limit Controller specifically engineered for critical HVACR and commercial air make-up equipment. This versatile industrial temperature limit switch integrates three essential functions—monitoring, timing, and limit control—into a single, reliable electronic unit. Designed for fail-safe HVAC operations, it features an adjustable low-limit set point (30°F to 65°F) and a high-limit set point (100°F to 220°F), providing comprehensive protection against temperature extremes. The inclusion of a 15-foot 100K ohm thermistor sensor ensures flexible installation and accurate remote sensing across large ductwork or equipment housings. With its rugged aluminum bracket design and UL-353 approved circuitry, the Antunes 8503130033 offers professional-grade reliability for protecting boilers, heaters, and ventilation systems from mechanical damage caused by out-of-range thermal conditions.

• Multifunctional Protection: Combines a temperature monitor, adjustable delay timer (1 to 8.5 minutes), and high-limit controller to serve as a comprehensive safety limit control.
• Enhanced Precision: Includes a dual 15' sensor for extended reach and precise temperature tracking in complex HVACR layouts.
• Manual Reset Security: The high-limit relay requires a manual reset once triggered, ensuring operators must inspect the system before resuming safe operation.
• Diagnostic Indicators: Features clear indicator lamps for high and low limit status to simplify troubleshooting and maintenance.
• Reliable Performance: Built with high-quality electronic components to replace older mechanical controls for superior accuracy and longevity.

How do I reset the high limit on the Antunes 8503130033?
Once the high-limit threshold is exceeded and the system shuts down, the relay latches for safety. To reset, ensure the temperature has dropped below the set point, then depress the manual reset button located on the front panel.

What equipment is this temperature controller compatible with?
This HVACR limit controller is primarily used in air make-up units, commercial boilers, and heating systems requiring UL-353 certified safety controls for high/low temperature monitoring.

Can the sensor cable be cut or extended?
It is recommended to use the factory-provided 15' sensor to maintain calibration accuracy (+/-3°F). For optimal performance, ensure at least two feet of cable near the sensor head is exposed to the same ambient temperature as the sensor itself.

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.