T-4002-301 Johnson Controls Thermostat

Overview

The Johnson Controls T-4002-301 is a single-temperature pneumatic room thermostat conversion kit designed to replace existing non-Johnson Controls instruments. This high-volume output, direct-acting controller provides proportional output signals to modulate pneumatic valves and damper actuators in HVAC systems. The kit includes a white plastic cover and all necessary mounting hardware to convert a wide array of two-pipe competitor thermostats, ensuring individual space temperature control and energy efficiency.

Features

• Universal conversion kit for simplifying the replacement of competitive pneumatic thermostats
• High-volume output for responsive control of multiple pneumatic devices
• Direct-acting (DA) proportional control logic
• Includes a white plastic cover with a thermometer window
• Vibration and shock-resistant construction for long-term durability
• Field-adjustable sensitivity to meet specific application requirements
• Pneumatic feedback mechanism for enhanced control accuracy

Specifications

• Brand: Johnson Controls
• Model: T-4002-301
• Action: Direct Acting
• Number of Pipes: 2 (with 1-pipe compatibility)
• Temperature Dial 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)
• Sensitivity: Adjustable from 0.75 to 4.0 psig/°F
• Connections: Barbed fittings for 5/32 in. O.D. polytubing
• Dimensions: 2.1 in. H x 3.1 in. W x 1.8 in. D

Applications

• Commercial and institutional HVAC building automation systems (BAS)
• Retrofitting existing pneumatic temperature control installations from other manufacturers
• Office buildings, schools, and hospitals requiring precise zone temperature regulation
• Control of pneumatic valves, dampers, and other actuators in heating and cooling systems
• Replacement of obsolete or failed high-volume output pneumatic controllers