18HES and SEL Operating instructions5 Mounting and dismountingCONFIDENTIAL4. Set the roller lever (3) to the required position andretighten the self-locking nut (9).5.2.2 Electrical connectionBeware!When tightening the nut (9), make sure the distance tothe cover (2) is sufficient enough so that the roller lever(3) will not come into contact with the cover (2) when theroller lever (3) is moving.Fig. 5-5: Mounting the roller lever on the belt misalignmentswitchNut (9)The roller lever (3) must notcome into contact with thecover (2) when moving.Shaft (14)! Danger of fatal electric shockWork on the device may be performed only by a quali-fied electrical technician.Prior to working, switch off the power supply to the sys-tem. Ensure that the system cannot be accidentallyswitched on. Mask any neighboring components thatmay be live to prevent contact.Danger!Only use connection cables with a diameter of at least11 mm up to a maximum of 16 mm. The permissibleconductor cross-sections can be found in Chapter 4:„Technical data", page 10.Penetration of dirt and water when gasketsare damagedIf gaskets are damaged, dirt and water can penetrateinto the device and damage the device and its compo-nents.Check gaskets for damage before assembling. If thegasket is damaged, exchange the device cover.!!