A.J. Antunes 8502100053 Limit Controller

The A.J. Antunes 8502100053 Limit Controller is a high-performance 24Vac TFH Series High/Low Temperature Limit Controller designed for critical equipment protection in industrial HVAC, air makeup, and mechanical systems. This versatile 3-in-1 electronic control unit integrates a temperature monitor, an adjustable delay timer, and a manual-reset high-limit controller within a single compact aluminum bracket. Engineered for maximum reliability, the TFH temperature controller prevents nuisance trips during startup with an adjustable delay of 1 to 8.5 minutes. It actively monitors for potential overheating or freezing conditions, allowing for adjustable low-limit setpoints from 30°F to 65°F and high-limit setpoints from 100°F to 220°F. With a fail-safe design and OEM quality, the Antunes 8502100053 ensures operational safety for food service ventilation and thermal processing equipment. Its universal 1/4-inch quick-connect terminals and rugged build make it an essential HVAC safety control for professional installations.

• Enhanced System Safety: Incorporates a fail-safe design with a manual-reset high-limit to prevent equipment damage.
• Reduced Maintenance: Built-in adjustable delay timer (1 to 8.5 minutes) eliminates nuisance tripping during initial system startup.
• Versatile Monitoring: Provides dual-limit protection, functioning as both a low-temperature limit switch and a high-limit safety cut-out.
• Robust Engineering: Features a durable aluminum "C" bracket and electronic components built to withstand ambient temperatures from -30°F to 140°F.
• Precision Control: Utilizes 100K dual thermistor sensors for high accuracy and consistent industrial temperature regulation.

What systems are compatible with the Antunes 8502100053?
This controller is typically used in industrial air makeup units, food service ventilation, and thermal processing machinery requiring 24VAC power input.

Can the temperature ranges be adjusted?
Yes, the low-limit range is adjustable from 30°F to 65°F, and the high-limit is adjustable from 100°F to 220°F to meet specific system requirements.

Does this unit reset automatically?
The high-limit function requires a manual reset after a trip to ensure the system is inspected for safety before resuming operation.

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.