Johnson Controls A-4000-138 Station 30067439-890 Calibration should be performed using

Calibration should be performed using a digital manometer

Enhanced Safety: High-performance flame sensing capabilities immediately shut down gas flow if a pilot or main burner failure is detected

Built for seamless integration into Daikin and McQuay packaged rooftop units

Optimized Performance: Enhances system longevity by preventing the unnecessary mechanical stress of timed defrost cycles in dry or mild conditions

What are the physical dimensions

Johnson Controls A-4000-138 Station 30067439-890 Calibration should be performed usingThe Johnson Controls A 4000 138 is a professional grade remote mounted pressure reducing station engineered to maintain precise pneumatic control system performance. This unit effectively regulates output pressure within a tight 0. 02 psi tolerance, even when managing input pressure variations of up to 20 psi. Designed for rigorous HVACR environments, it handles a maximum input pressure limit of 300 psig and provides a reliable air flow capacity of 25