Johnson Controls JT33A00T Motor Actuator

The Johnson Controls JT33A00T is a high-performance motor actuator designed for precise modulating control in commercial HVACR applications. Specifically engineered for use with J Series Electric Zone Valves, this 24VAC actuator utilizes a three-wire floating signal to accurately manage the flow of hot water, chilled water, or saturated steam through coils and heat exchangers. As a non-spring return (NSR) component, the unit maintains its last position upon loss of power, making it an ideal choice for systems where failsafe positioning isn't required but positional stability is paramount. The integrated control signal time-out feature enhances system reliability by reverting the motor to a predefined state if communication is interrupted, preventing potential overflows or thermal imbalances. Contractors value the synchronous motor for its consistent cycle times and the ease of field conversion between normally open and normally closed configurations without re-piping. With a robust housing and compatibility with 50 psi close-off pressure requirements, the JT33A00T ensures long-term performance in high-pressure pumping systems and high-rise building environments.

• Streamlined Installation: The quick-removal design allows for rapid actuator replacement or servicing without the need for special linkage kits or complex commissioning steps.
• Versatile Compatibility: Seamlessly integrates with J Series JM valves in both two-way and three-way body patterns, handling media temperatures from 32°F to 200°F.
• Signal Reliability: The three-wire floating control with signal time-out protection ensures the actuator responds accurately to building automation system commands while protecting against signal loss.
• High-Efficiency Performance: Features a reliable synchronous motor that provides bubble-tight shutoff to conserve energy and maintain tight zone temperature control.

What is the purpose of the 'time-out' feature on the JT33A00T?
The time-out function is a failsafe mechanism that stops the motor after a specific duration of inactivity or signal loss. This prevents the actuator from attempting to drive past its mechanical limits and protects the internal gearing from premature wear.

Can I use this actuator on an existing valve body?
Yes, the JT33A00T is designed for easy field mounting on Johnson Controls J Series valve bodies. It is an ideal replacement for older or failed actuators, as it requires no complex calibration upon installation.

Does this unit require a specific transformer?
This 24VAC motor should be powered by a Class 2 transformer. Ensure the total VA load of the zone valve system does not exceed the transformer's rated capacity to prevent voltage drops that could affect signal floating accuracy.

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.