Johnson Controls T-4002-301 2 Pipe DA Thermostat Beige with Cover and Conversion Kit

The Johnson Controls T-4002-301 is a pneumatic thermostat designed to regulate temperature in commercial and industrial buildings. It employs compressed air pressure to indicate a pneumatic valve or damper actuator to control the heating or cooling capacity to achieve a particular temperature variation. This direct-acting acts on the valve or damper to open it when the temperature is high and to close it when the temperature is low. The T-4002-301 is suitable for two pipe VAV systems that use two pipes, one for supply and the other for return air. It has a beige cover and a conversion kit for replacing other non-Johnson Controls thermostats on the market.