Johnson Controls T-3100-2 Thermostat

The Johnson Controls T-3100-2 is a robust pneumatic thermostat designed for precision control in HVAC pneumatic control systems. This non-relay type thermostat operates with a direct acting control signal, increasing output pressure as the sensed temperature rises. Engineered for versatility, it features a 60 to 150 degree F range and includes a 42-inch capillary for remote sensing in varied duct or room environments. With a 25 psig maximum supply pressure, it is compatible with most standard pneumatic footprints. Installation is streamlined via the barbed restrictor tee designed for 1/4" OD polytubing and an 1/8" FPT slave air connection. This unit provides reliable proportional control for heating or cooling equipment, ensuring stable setpoint maintenance in demanding commercial configurations.

• Direct Acting Operation: Ensures seamless integration with direct-acting pneumatic actuators and valves.
• Remote Sensing Capability: The 42-inch capillary allows for flexible sensor placement away from the controller body.
• Standardized Connections: Features 1/4" barbed fittings and 1/8" FPT connections for fast field installation.
• Universal Mounting: Includes the necessary cover and mounting bracket for immediate deployment.

Common Questions

How do I calibrate the T-3100-2 for specific setpoints?
Calibration is performed using a test gauge and the setpoint adjustment screw; ensure supply pressure is stable at 20-25 psig before making adjustments to the 150-degree range.

Can this replace a reverse acting thermostat?
No, the T-3100-2 is a direct acting model. Using this in a reverse acting application without a reversing relay will cause the control logic to operate backwards.

What tubing is required for the barbed restrictor tee?
The unit is designed specifically for 1/4" OD polyethylene tubing, commonly used in standard pneumatic control loops.

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.