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The cut-out pressure should be in accordance with the pressure setting of the piece number being used. (Common cut-out pressures are between 105-125 psi.) With the engine still running, make a series of brake applications to reduce the air pressure and observe at what pressure the governor cuts-in the compressor.
As for a variable air volume (VAV) system, the air duct static pressure is a typical control variable maintained by modulating supply fan speed.The static pressure equals to the summation of the duct pressure loss downstream of the sensor to the terminal box and box inlet static pressure.his paper presents the theoretical models to express the impacts of static pressure reset on fan airflow, fan head, air leakage, fan power and thermal energy for both pressure independent and pressure dependent boxes.