Please refer to the operating instructions of your AV receiver.
Basically: Set the speakers (front, rear and centre) to Small in the Setup menu. Select Subwoofer On. Select a crossover frequency between 80 Hz (THX, Theater, Definion and Ultima systems) and 120 to 160 Hz (Consono, Cubycon, Columa, LT, Varion, Viton etc.).
The exact specification for the crossover frequency can be found in the technical data on the product detail page. Then start the automatic calibration. Select the level of the subwoofer in the menu of the AV receiver according to your taste. Notes on the phase position of the subwoofer can be found on this page https://lu.teufelaudio.com/phasenlage.html.