Johnson Controls T-4000-611 Adaptor

The Johnson Controls T-4000-611 Adaptor is a critical pneumatic thermostat conversion kit engineered to transition legacy T-400 series dual temperature units to the modern T-4000 series. This Bakelite back adaptor is specifically designed for dual temperature vertical or horizontal instruments, featuring two pipehead adaptors to maintain seamless pneumatic integration. As a high-performance HVAC pneumatic control accessory, it allows technicians to utilize existing mounting footprints while upgrading to the superior sensitivity and bimetal sensing technology of newer controllers. The kit includes the necessary mounting hardware for field installation, ensuring the T-4000-611 provides a stable, vibration-resistant interface for both flush and surface-mounted pneumatic lines. By utilizing this Johnson Controls adaptor, contractors can modernize commercial building automation systems without the high cost of a full DDC overhaul, maintaining reliable proportional output signals for pneumatic valves and damper actuators across various heating and cooling applications.

• Direct Retrofit Compatibility: Specifically designed to convert T-400 series dual-temp thermostats to T-4000 series without replacing the original Bakelite back.
• Dual Configuration Support: Includes two pipehead adaptors, making it compatible with both 2-pipe and 3-pipe dual temperature systems.
• Versatile Mounting: Supports both vertical and horizontal orientations to match existing wall box or surface-mount configurations.
• Technical Integrity: Preserves the pneumatic feedback and setpoint accuracy required for precise space temperature control in commercial HVACR environments.

Does the T-4000-611 include the thermostat?
No, this is a conversion kit only. The T-4000 series thermostat and compatible cover must be ordered separately to complete the installation.

Can this be used for single temperature models?
The T-4000-611 is a dual-temp adaptor. For single temperature T-400 to T-4000 conversions, the T-4000-610 is typically the appropriate selection.

What tubing size is compatible with the pipehead adaptors?
The adaptors are designed for use with standard 5/32" OD polyethylene tubing, ensuring a leak-proof connection to the instrument's barbed air terminals.

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.