Johnson Controls T-8000-1 Controller

The Johnson Controls T-8000-1 Remote Element Controller is a high-performance pneumatic temperature controller engineered for precise proportional action in commercial HVACR systems. This relay-type instrument features a non-compensated capillary and a 4-foot bulb element, making it ideal for monitoring air or liquid temperatures in ducts, tanks, and plenum chambers where the controller itself must be mounted on a local control panel. Its dual-scale dial provides flexibility with temperature ranges of -10 to 124°F and 110 to 244°F, ensuring cross-application compatibility for both heating and cooling requirements. Built with flexure levers to minimize hysteresis and friction, the T-8000-1 maintains reliable linear output for pneumatic valves and actuators. The unit is field-adjustable for direct or reverse acting configurations via a simple slider adjustment, providing technical versatility for complex building automation sequences. Designed for surface mounting, this controller facilitates easy calibration and setpoint management through its clear-view cover.

• Versatile Proportional Control: Easily switches between direct and reverse action to match specific logic requirements for pneumatic actuators.
• Enhanced Durability: Utilizes a rugged 4-foot capillary and bulb element for remote sensing in extreme environments while keeping the controller protected.
• High-Accuracy Ranges: Two-sided dial supports a broad operating spectrum, from low-limit monitoring to high-temp liquid line applications.
• Reduced Maintenance: Mechanical flexure levers decrease physical wear and internal friction, extending the operational life of the setpoint mechanism.
• Panel-Ready Design: Optimized for local control panel mounting with 1/4" O.D. polytubing connections and accessible test gauge ports.

How do I change the T-8000-1 from direct to reverse acting?
Adjust the internal sensitivity or gain slider on the marked rail. Moving the slider toward the "Direct" or "Reverse" markings repositions the flexure assembly to invert the pneumatic output signal relative to the temperature change.

What is the maximum supply pressure for this controller?
The Johnson Controls T-8000-1 typically operates within a standard pneumatic range, but ensure the supply air does not exceed 20 psig to prevent damage to the internal relay and diaphragms.

Can the 4-foot capillary be shortened in the field?
No, the capillary length is factory-sealed and charged. Cutting or kinking the tube will cause a permanent loss of calibration and render the bulb element non-functional.

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.