Johnson Controls T-4000-2145 Plastic Cover This assembly is optimized for

This assembly is optimized for Building Automation Systems (BAS) and commercial HVACR environments where HVAC valve control must remain consistent under high static pressures

This SPST normally closed switch is engineered to break the electrical circuit when the plenum temperature reaches the 200°F fixed open temperature

large exhaust fans can also create negative pressure that pulls flue gases out of the draft hood and onto the vent safety switch

protecting the motor windings from premature failure due to voltage instability

Can I use one key for multiple guards in the same building

Johnson Controls T-4000-2145 Plastic Cover This assembly is optimized forThe Johnson Controls T 4000 2145 Plastic Cover is a professional grade replacement engineered specifically for T 4000 series pneumatic thermostats. This beige thermostat cover is designed for vertical mounting applications and provides a clean, secure finish for your field installations. Featuring a single set point window, it allows for immediate visual verification of thermostat settings without the need to remove the housing, streamlining routine