T-4002-302 Johnson Controls Thermostat

Overview

The Johnson Controls T-4002-302 is a high-volume, single-temperature pneumatic thermostat conversion kit designed to replace or upgrade existing non-Johnson Controls two-pipe room instruments. This reverse-acting thermostat provides proportional control of heating and cooling systems by modulating controlled devices in response to space temperature changes. The comprehensive kit is engineered to simplify the conversion process, offering a universal solution that reduces the need for extensive replacement parts inventory.

Features

• Reverse-acting pneumatic mechanism for precise temperature regulation
• High-volume output capability suitable for various HVAC control systems
• Adjustable sensitivity from 0.75 to 4.0 psig/F to meet specific application needs
• Vibration and shock-resistant design for long-term durability in industrial environments
• Includes a white plastic cover with a thermometer window for a professional finish
• Comprehensive conversion hardware compatible with a wide array of competitor wallboxes, including Honeywell, Barber-Colman, and Landis & Gyr

Specifications

• Brand: Johnson Controls
• Model: T-4002-302
• Action: Reverse Acting
• Control Type: Single Temperature, 2-Pipe
• Temperature Dial Range: 55 to 85 F (13 to 29 C)
• Supply Air Pressure: 13 to 25 psig (Nominal 20 psig)
• Max Air Pressure: 25 psi
• Sensitivity: 0.75 to 4.0 psig/F (Factory set at 2.5 psig/F)
• Air Consumption: 20 scim (5 mL/s)
• Flow Capacity: 400 scim (107 mL/s)
• Mounting Style: Horizontal
• Connection Size: 5/32 in. barbed fittings

Applications

• Commercial and institutional HVAC systems requiring pneumatic temperature control
• Retrofitting or replacing older, obsolete pneumatic thermostats from various manufacturers
• Industrial facilities such as warehouses, factories, and workshops
• Public spaces where tamper-resistant, professional-grade temperature regulation is required
• Office buildings and hospitals utilizing centralized building automation systems (BAS)