T-4516-202 Johnson Controls Thermostat

Overview

The Johnson Controls T-4516-202 is a high-performance, dual-temperature pneumatic room thermostat designed to provide individual day and night temperature control or weekend setback in commercial and industrial HVAC systems. This 3-pipe, high-volume output device features a direct-acting control action and a vertical mounting configuration, allowing it to efficiently modulate controlled devices and drive pneumatic actuators in response to space load changes.

Features

• Dual temperature control with two independent adjustment dials for day and night settings
• Direct-acting control action for straightforward system integration
• High-volume output with a 400 SCIM flow capacity to quickly position controlled devices
• Low air consumption of only 20 SCIM for energy-efficient operation
• Standard manual indexing switch to temporarily restore day operation locally
• Proportional output signal to minimize mechanical heating and cooling demands

Specifications

• Control Action: Direct Acting
• Mounting: Vertical
• Flow Capacity: 400 SCIM
• Air Consumption: 20 SCIM
• Supply Pressure: 13 to 25 psig
• Temperature Dial Range: 55°F to 85°F
• Air Connections: Three (Supply, Output, and Switchline)
• Sensitivity: Adjustable from 0.75 to 4.0 psig/°F

Applications

• Commercial and industrial building HVAC pneumatic control systems
• Dual-temperature zone control in offices, schools, and institutional facilities
• Pneumatic actuator-driven air handling units and terminal systems
• Retrofit and replacement of legacy dual-temperature pneumatic thermostat installations