T-4002-9008 Johnson Controls Thermostat

Overview

The Johnson Controls T-4002-9008 is a high-performance pneumatic room thermostat designed for precise individual space temperature control in commercial and industrial HVAC systems. This single-temperature, direct-acting controller provides a proportional output air signal to modulate pneumatic devices such as valves and damper actuators. Engineered for horizontal mounting, it features a Celsius scale (12 to 30°C) and a rugged bimetal sensing element for reliable operation in demanding environments.

Features

• Proportional output signal for smooth modulation of controlled devices
• Direct-acting (DIR) operation where output pressure increases as temperature rises
• Dual bimetal sensing elements for improved accuracy and stability
• Adjustable sensitivity and setpoints to meet specific application requirements
• Vibration and shock-resistant construction for long-term durability
• Integrated pneumatic feedback for enhanced control precision
• Elements labeled for easy identification during maintenance and calibration

Specifications

• Action: Direct Acting (DIR)
• Mounting Style: Horizontal
• Control Range: 12 to 30 degrees Celsius
• Supply Pressure: 13 to 25 PSIG (91 to 175 kPa); 20 PSIG (140 kPa) nominal
• Air Consumption: 20 SCIM (5.5 mL/s)
• Output Flow Capacity: 400 SCIM (109 mL/s)
• Sensitivity: Adjustable from 0.75 to 4 PSI/°F (9 to 50 kPa/°C)
• Ambient Temperature Limits: -20 to 130°F (-29 to 54°C)
• Air Connections: Barbed fittings for 5/32 in. O.D. polytubing
• Dimensions: 2-3/32 in. Height x 3-1/8 in. Width x 1-3/4 in. Depth

Applications

• Commercial office buildings requiring localized pneumatic temperature control
• Educational and institutional facilities with existing pneumatic HVAC infrastructure
• Industrial spaces where bimetal sensing is preferred for durability
• Integration with two-pipe heating and cooling pneumatic control loops
• Retrofit or replacement in T-4000 series thermostat installations