T-4002-9009 Johnson Controls Thermostat

Overview

The Johnson Controls T-4002-9009 is a high-volume output, single-temperature pneumatic room thermostat engineered for industrial and commercial HVAC systems. Operating on a reverse-acting sequence, this 2-pipe controller increases its branch line pressure as the ambient temperature decreases, allowing for the proportional control and seamless modulation of pneumatic devices like valves and damper actuators. It is specifically factory-calibrated for horizontal wall mounting and features a Celsius temperature scale for clear environmental monitoring.

Features

• Reverse-acting operation that modulates controlled devices as space temperature changes
• High-volume air flow capacity of 400 SCIM for efficient system response without needing additional volume boosters
• Durable and accurate bi-metallic sensing element that resists vibration and shock
• Two-pipe configuration compatible with standard pneumatic distribution systems
• Horizontal orientation ideal for installations with vertical height constraints
• Adjustable sensitivity settings to fine-tune building automation control loop performance
• Barbed fittings for a secure direct connection to standard 5/32 inch O.D. polytubing

Specifications

• Brand: Johnson Controls
• Model: T-4002-9009
• Action Type: Reverse Acting
• Mounting Style: Horizontal
• Number of Pipes: 2 Pipe
• Temperature Control Range: 12 to 30 Degrees Celsius
• Supply Pressure: 13 to 25 psig (nominal 20 psig; must be clean, dry, and oil-free)
• Air Consumption: 20 SCIM
• Output Flow Capacity: 400 SCIM
• Control Air Pressure Range: 3 to 15 psi (factory calibrated for 8 psi output at set point)
• Sensitivity Range: Adjustable from 0.75 to 4 psi per Degree F
• Connection Type: 5/32 inch Barbed
• Maximum Ambient Temperature: 135 Degrees F
• Dimensions: 2.1 inches Height x 3.1 inches Width x 1.8 inches Depth

Applications

• Commercial heating and cooling system management in schools, hospitals, and office buildings
• Proportional control of pneumatic valves and damper actuators in building automation loops
• Hot water heating valve control and fan coil or air handling unit regulation
• Space temperature control requiring explicit metric readings and horizontal mounting
• Field replacement or maintenance of existing T-4000 series pneumatic room thermostats