Johnson Controls T-4002-5017 Dial

The Johnson Controls T-4002-5017 Dial is a critical replacement component designed for horizontal mounted thermostats within the T-4000 series pneumatic control systems. This external set point dial facilitates precise manual adjustments of the pneumatic thermostat setpoint, allowing technicians to calibrate or modify space temperature settings without removing the protective cover. Engineered for high volume output thermostats, the dial features a clear Fahrenheit scale (55? to 85?F) and comes as a complete thermostat accessory kit including the dial, pointer, and a captivated dial holding screw for secure field installation.

Constructed from durable, industrial-grade plastic, the T-4002-5017 is specifically optimized for HVAC pneumatic controls where vibration resistance and long-term reliability are paramount. It ensures seamless compatibility with single temperature thermostats like the T-4002-201 and T-4002-204 models. For contractors managing building automation systems (BAS) or legacy pneumatic control loops, maintaining accurate setpoint adjustment interfaces is essential for preventing energy waste and ensuring proportional output signals remain within calibrated 140 kPa (20 PSIG) supply parameters.

Key Benefits for Technicians

• Direct Compatibility: Engineered specifically for the Johnson Controls T-4000 series horizontal thermostats, ensuring a perfect fit and alignment with internal bimetal elements.
• Simplified Calibration: Enables rapid field setpoint verification and adjustment, crucial for maintaining proportional pneumatic signals.
• All-In-One Kit: Includes the pointer and captivated screw, reducing downtime by providing all hardware required for immediate replacement on pneumatic room thermostats.
• Robust Readability: High-contrast Fahrenheit markings allow for accurate temperature control adjustments in low-light mechanical rooms or commercial spaces.

Common Questions

• Is this dial compatible with vertical thermostats? No, the T-4002-5017 is designed strictly for horizontal mounting configurations. For vertical units, the T-4002-5018 is the correct requirement.
• Does this include the thermostat housing? No, this is a specialized external set point dial replacement kit and does not include the full thermostat body or cover.
• Can I use this on 1-pipe or 2-pipe systems? Yes, this dial is compatible with both 1-pipe and 2-pipe T-4000 series models, provided they are in a horizontal orientation.

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.