Johnson Controls T-4002-303 Conversion Kit

The Johnson Controls T-4002-303 Conversion Kit is a professional-grade solution designed for upgrading or replacing legacy pneumatic thermostats in commercial HVAC systems. This Direct Acting kit features a standard 55-85°F dial range, providing precise pneumatic control within tight tolerances for optimized building automation. Engineered to replace Honeywell, Robertshaw, or older Johnson Controls models, the T-4002-303 streamlines the retrofitting process by utilizing existing air lines while providing the reliability of a modern single temperature thermostat. The beige cover ensures a professional aesthetic for wall-mounted installations. Contractors rely on this kit for its compatibility with standard air pressure signals and its ability to maintain consistent setpoints in multi-zone pneumatic loops. By integrating this kit, technicians can restore HVAC system efficiency without the high cost of a full electronic control conversion, ensuring the pneumatic actuator and damper cycles remain accurate and responsive.

• Wide Compatibility: Designed to replace a broad variety of legacy pneumatic controllers with minimal modifications.
• Direct Acting Performance: Ensures immediate response for systems requiring a proportional increase in output pressure as temperature rises.
• Field Calibration: Features accessible calibration points for fine-tuning the 55-85°F range to specific zone requirements.
• Complete Hardware Kit: Includes the necessary mounting bracket and a durable beige finish cover for a clean installation.
• Industrial Durability: Built to withstand the constant cycling typical of high-traffic commercial environments.

Common Questions

Is the T-4002-303 compatible with reverse-acting systems?
No, this specific kit is configured for Direct Acting applications. Ensure your control sequence increases branch pressure when the temperature exceeds the setpoint before installation.

What is the maximum supply air pressure for this kit?
The unit is designed for standard pneumatic supply pressures, typically operating at 20 psi, and supports the 55-85°F setpoint range effectively.

Does this kit include a thermometer on the cover?
The T-4002-303 is a standard dial-adjustment kit with a beige cover; specific cover variants with thermometers may be sourced separately for visual monitoring.

This item is not eligible for free shipping.

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.