Title: 36 Siemens GDB181-MO.pdf.pdf
The parameter Vn is used to adjust the operating range of the differential pressure sensor (0…300 Pa) to the actual VAV box nominal pressure Dpn at the factory. The effect of Vn is illustrated in the diagram below.1 00908070 6050403020100050100150200250300n = V300 ΔpnPa PaAssume that a VAV box is designed for a nominal pressure of Δpn = 120 Pa. Then, Vn has to be set to 1.58:=& Vn300 120Pa Pa=2.5=1.5813 / 40VAV Compact Controller Modbus RTUA6V10631862_en--_d 2019-09-13ApplicationNoteControl of air volume flow in supervisory controllerSupply / extract air control14 / 40Siemens Smart InfrastructureFunctionality / application Fields of applicationVAV Compact Controllers are primarily used for controlling a variable or constant air volume flow.System environments:Building automation systems using Modbus RTU (third-party integration and freely programmable devices)