Information for Using the Installation Instructions Warning! Safety note: Failure in observing these warnings may result in injuries to persons or damage of equipment. Caution! Safety note: Failure to observe this warning may result in damage to materials and impair the functioning of the unit. Caution! Safety note which points out the dangers involved with electrical current or electrical voltage: Failure to observe this warning may result in damage to materials and impair the functioning of the unit. Note: Supplementary information on the operation of the unit. Action: This symbol indicates to you that you must do something. The actions necessary are described step by step. This symbol describes the result of an action. Please also observe the following safety notes.