Johnson Controls T-4002-9009 Pneumatic Thermostat 30067439-890 this furnace air pressure switch

this furnace air pressure switch prevents ignition under hazardous conditions such as blocked flues

meeting standard electrical codes for commercial HVACR installations

generating the necessary 750mV to power your electromagnetic gas valves

allowing for the rapid restoration of gas appliance safety and performance in the field

Johnson Controls T-4002-9009 Pneumatic Thermostat 30067439-890 this furnace air pressure switchThe Johnson Controls T 4002 9009 Pneumatic Thermostat is a high volume output single temperature controller specifically designed for facility managers and HVAC technicians who require precise proportional control in commercial settings. Operating on a reverse acting sequence, this thermostat increases its branch line pressure as the ambient temperature decreases, making it ideal for managing heating and cooling applications through 2 pipe pneumatic