If an earth connection is necessary, check that it correctly connected and that adequate thermal and overloading protection has been connected and adjusted to the corresponding limits. - If a ventilator is installed in a duct, the duct must be exclusively for the ventilation system.
Če je potrebno ozemljitev, preverite, ali je pravilno priključena in ali je bila priključena ustrezna zaščita za toploto in preobremenitev ter nastavljena na ustrezne meje. - Če je v kanal nameščen ventilator, mora biti kanal uporabljen izključno za prezračevalni sistem.