Johnson Controls T-4002-9012 Pneumatic Thermostat 30067439-890 0A at 24VAC) used for

0A at 24VAC) used for burner or circulator relay signaling

Installation is versatile with a 1/2" conduit hub and universal break-off mounting tabs

the replaceable valve insert and stainless steel spindle allow for maintenance and operator swaps without the need to drain or shut down the entire heating loop

It is standard practice to turn the screw an additional 1/4 turn beyond the threshold to provide operational margin and prevent nuisance switching

Rugged Construction: Built with industrial ceramic and nichrome materials to withstand high-cycle thermal stress

Johnson Controls T-4002-9012 Pneumatic Thermostat 30067439-890 0A at 24VAC) used forThe Johnson Controls T 4002 9012 is a high performance, single temperature pneumatic room thermostat designed for precision control in commercial HVAC systems. As a direct acting (DA) controller, this unit provides a proportional output air signal that increases as the space temperature rises, making it an essential component for modulating pneumatic valves and damper actuators in heating and cooling applications. Engineered for vertical mount