fixed Static pressure

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I'm tring to validate Energyplus simulation model with real-time dataset.This dataset says all tests static pressure fixed at 249 Pa. The RTU is as the main HVAC system for FRP-2. The direct expansion (DX) cooling coil and heating coil are installed in RTU. DX cooling coil consumes electrical energy and heating coil connects to the gas furnace. Each of the 10 conditioned zones has its own VAV box for reheating. I wonder hou to set static pressure at 249 pa in Energyplus 9.2 Can somebody teach me? any suggestion welcome.