T-4002-9012 Johnson Controls Thermostat

Overview

The Johnson Controls T-4002-9012 is a high-volume output, single-temperature pneumatic room thermostat designed to provide proportional control of pneumatic valves and damper actuators. This direct-acting controller modulates output air signal in response to temperature changes, ensuring precise environmental management in commercial and industrial HVAC systems. Engineered for vertical mounting, it features a bi-metallic sensing element and is a reliable solution for heating or cooling applications requiring high airflow capacity.

Features

• Direct-acting (DIR) operation where output pressure increases as temperature rises
• High-volume output capacity of 400 SCIM for rapid response of controlled devices
• Single-temperature control with a single exposed setpoint dial
• Vertical mounting orientation for standard wall installations
• Bi-metallic spring sensing element for durable and accurate temperature detection
• Adjustable sensitivity to fine-tune system response
• High-impact construction suitable for demanding environments

Specifications

• Brand: Johnson Controls
• Model: T-4002-9012
• Action Type: Direct Acting
• Mounting: Vertical
• Supply Pressure: 13 to 25 psig (20 psig nominal)
• Control Air Pressure: 3 to 15 psi
• Temperature Control Range: 55 to 85 degrees Fahrenheit (12 to 30 degrees Celsius)
• Air Consumption: 20 SCIM
• Air Flow Capacity: 400 SCIM
• Air Connections: 5/32 inch barbed fittings
• Sensitivity: Adjustable from 0.75 to 4 psi per degree Fahrenheit
• Dimensions: 2-3/32 in. H x 3-1/8 in. W x 1-3/4 in. D

Applications

• Commercial HVAC systems utilizing pneumatic temperature control
• High-volume air systems requiring fast-acting valves or large actuators
• Office buildings, schools, and hospitals
• Heating or cooling control in 2-pipe pneumatic distribution systems
• Retrofit or replacement in existing Johnson Controls T-4000 series installations