T-4002-202 Johnson Controls Thermostat

Overview

The Johnson Controls T-4002-202 is a high-volume output, single-temperature pneumatic thermostat designed for individual space temperature control in commercial and industrial HVAC systems. This proportional-action controller modulates pneumatic devices, such as valves and damper actuators, in response to room temperature changes. The T-4002-202 is specifically configured for reverse-acting operation and horizontal mounting, providing efficient and precise control for heating and cooling applications.

Features

• High-volume output for rapid response of controlled devices
• Reverse-acting control mechanism
• Adjustable sensitivity from 0.75 to 4 psi/F
• Integrated pneumatic feedback for enhanced accuracy
• Durable bimetal sensing element
• Fahrenheit setpoint dial with a range of 55 to 85 degrees F
• Vibration and shock-resistant construction for industrial environments
• Includes an output test connection for simplified field calibration and service

Specifications

• Action: Reverse Acting
• Mounting: Horizontal
• Setpoint Range: 55 to 85°F (13 to 29°C)
• Supply Pressure: 13 to 25 psig (Nominal 20 psig)
• Air Consumption: 20 SCIM (5.5 mL/s)
• Output Flow Capacity: 400 SCIM (109 mL/s)
• Air Connections: Two 5/32 in. barbed fittings (Supply and Output)
• Ambient Temperature Limits: -20 to 130°F (-29 to 54°C)
• Dimensions: 2.1 in. H x 3.1 in. W x 1.8 in. D

Applications

The T-4002-202 is ideal for use in schools, hospitals, office buildings, and government facilities where precise pneumatic temperature control is required. It is commonly used to manage single-stage heating or cooling systems by modulating terminal units, such as radiators, reheat coils, and mixing boxes. Its high-volume output makes it particularly suitable for systems with large pneumatic actuators or long tubing runs where fast response times are critical.

T-4002-202 Johnson Controls Thermostat Tech Sheet

T-4002-202 Johnson Controls Thermostat Catalog Page

T-4002-202 Johnson Controls Thermostat Selection Guide