Supply / extract air control
If 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 5.3, constant, positive, or negative pressure in a zone or a room can be achieved. 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.
