Title: 36 Siemens GDB181-MO.pdf.pdf
Fundamental of all applications realized with VAV Compact Controllers is the principle to control the air volume flow in the supervisory controller.4.2.1 Supply and extract air controlIf one VAV Compact Controller is used for supply air and one for extract air, these are usually controlled individually by the supervisory controller. By setting their volume flow limits (Vmin and Vmax) according to the setting instructions in section 6.3, constant, positive or negative pressure in a zone or a room can be achieved.VAV Compact Controller Modbus RTUA6V10631862_en--_d 2019-09-13Example: AHU control optimizationSiemens Smart InfrastructureLegend:Bus Fieldbus (Modbus, BACnet,KNX etc.)N1 Room unit with temp. sensorN2VAV Compact Controllers(supply air / extract air)When omitting the extract air part, a simple supply air control application can be realized. Disadvantages are that ventilation conditions in the room or zone can’t be controlled precisely.