Johnson Controls T-4752-206 Thermostat

The Johnson Controls T-4752-206 is a high-volume output pneumatic heating-cooling thermostat engineered for precise temperature regulation in commercial HVAC systems. This dual-element controller features a sophisticated automatic changeover mechanism, operating at 15 psig reverse acting for heating and 20 psig direct acting for cooling. Designed for vertical mounting, the unit utilizes a single dial to adjust set points for both cycles simultaneously, ensuring consistent environmental control. Its high-capacity air valves facilitate rapid response times in high-volume applications, while the Fahrenheit dial provides a clear 55°F to 85°F range for field calibration. This pneumatic room thermostat is a standard-tier component for building automation systems requiring reliable air-operated switching and sensitivity adjustment. Please note that the cover and mounting bracket are sold separately to allow for specific architectural or retrofit matching.

Key Benefits

• Automatic Changeover: Seamlessly transitions between heating and cooling modes via supply pressure shifts (15 to 20 psig).
• High-Volume Output: Delivers rapid pneumatic signal transmission to actuators and dampers for tighter system control.
• Dual Acting Modes: Integrated reverse acting and direct acting logic simplifies complex sequence operations.
• Field Adjustable: Sensitivity can be tuned between 0.75 and 4.0 psi/°F to match specific zone requirements.
• Universal Vertical Fit: Standard vertical mounting configuration matches existing T-4000 series installations.

Common Questions

What is the switchover pressure for the T-4752-206?
Internal calibration is factory-set to switch at 17.5 psig, the midpoint between the 15 psig and 20 psig supply signals.

Can I use this for a horizontal mounting application?
No, the T-4752-206 is specifically designed for vertical mounting. For horizontal applications, you must use the T-4752-205 model to ensure the internal elements function correctly.

Does this unit include the decorative cover?
No. As specified in the technical data, the cover and mounting bracket must be ordered separately based on your project’s aesthetic and installation needs.

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.