Johnson Controls T-4054-1 Thermostat

The Johnson Controls T-4054-1 is a professional-grade pneumatic thermostat designed for high-performance energy manager heating-cooling applications. As a direct acting controller, this unit is engineered for precision in demanding HVACR environments, featuring a substantial 400 SCIM flow capacity to drive multiple actuators or large-volume pilot-operated systems without lag. The T-4054-1 thermostat utilizes a dual-dial configuration for independent setpoint adjustment between 55 and 85°F, allowing for an adjustable deadband between 5 and 12 psig. This deadband range is critical for industrial energy conservation, as it effectively eliminates the risk of simultaneous heating and cooling overlap. Operating on a 13 to 25 psig supply pressure with a lean 38 SCIM air consumption, this energy manager thermostat integrates seamlessly into existing bimetal-based pneumatic control loops. For veteran contractors, the horizontal mounting and high-volume output ensure reliable modulation of valves and dampers in complex commercial building automation systems.

• High Volume Output: 400 SCIM flow capacity allows for rapid response and the ability to control multiple pneumatic actuators simultaneously.
• Energy Conservation: The adjustable deadband minimizes energy waste by creating a neutral zone where neither heating nor cooling is active.
• Precise Dual Dials: Features two independent bimetal sensing elements for highly accurate 55 to 85°F setpoint calibration in direct acting modes.
• Rugged Construction: Specifically designed for commercial HVAC pneumatic controls, providing durability against vibration and shock common in mechanical rooms.

What is the primary difference between the T-4054-1 and T-4054-2?
The T-4054-1 is a direct acting (D.A.) model, meaning output pressure increases as temperature rises. The T-4054-2 is the reverse acting (R.A.) counterpart.

How do I adjust the deadband on this unit?
The deadband is adjusted via the internal settings between the heating and cooling dials, typically ranging from 5 to 12 psig to define the pressure spread between sequences.

Can I use standard mounting screws with this thermostat?
No, this unit requires a specific mounting arrangement. Using two standard screws can distort the baseplate and negatively impact the factory calibration of the dual bimetal sensors.

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.