- 16 -3) Fitting the safety guard to the grass trimmerIf you use the unit as a grass trimmer follow the instructions below:1. Loosen the blade retainer nut clockwise and remove the blade retainer.2. Mount the grass trimmer head and tighten it.(see photo 22-23)Note: Please store the blade retainer and nut in a safe place.WARNING! Do not use the line cutting head without the plastic guard.IX. CONNECTIONThis machine may only be connected to single-phase 230VAC 50Hz UK Mains outlet. Ensurethat the mains voltage is the same as the operating voltage indicated on the rating plate.X. OPERATIONWARNING:Do not use any attachments or accessories not recommended by the manufacturer of thisproduct. The use of attachments or accessories not recommended can result in seriouspersonal injury and invalidate your guarantee.Switching onSqueeze the trigger lockout, then squeeze the trigger.Switching offRelease the trigger or the trigger lockout. Either will stop the machine.(see photo 25)Photo 22 Photo 23