Johnson Controls T-4002-9009 Pneumatic Thermostat, Reverse Acting, Horizontal

Description

The Johnson Controls T-4002-9009 is a reverse-acting pneumatic thermostat engineered for precise temperature control in commercial and industrial HVAC systems. Designed for horizontal wall mounting, this thermostat delivers dependable pneumatic control across a sensing range of 12 to 30 degrees Celsius (approximately 54–86°F), making it well-suited for a wide variety of building automation and climate control applications.

How It Works

As a reverse-acting thermostat, the T-4002-9009 increases its pneumatic output signal as the sensed temperature decreases, and decreases output as temperature rises. This action is ideal for controlling heating systems, hot water valves, and other applications where a rise in temperature should reduce the control signal — ensuring efficient, stable operation in your building’s pneumatic control loop.

Key Features

• Reverse-acting pneumatic operation for heating and compatible control applications
• Temperature sensing range: 12 to 30 degrees Celsius (approx. 54–86°F)
• Horizontal mount design for straightforward wall installation
• Pneumatic control output compatible with standard building automation pneumatic systems
• Durable construction built to Johnson Controls’ commercial-grade standards
• Compact form factor suitable for office, institutional, and light industrial environments

Typical Applications

• Commercial building HVAC pneumatic control systems
• Hot water heating valve control
• Fan coil unit temperature regulation
• Air handling unit control loops
• Institutional and industrial facility climate management

Why Choose the Johnson Controls T-4002-9009?

Johnson Controls has been a trusted name in building controls for over a century. The T-4002-9009 continues that legacy with a reliable, field-proven pneumatic thermostat that integrates seamlessly into existing pneumatic control infrastructures. Its horizontal mounting orientation and clearly defined operating range simplify installation and commissioning, reducing labor time on the job site.