Precautions for Correct Use Precautions for Correct Use Installation Mount the product on the vertical wall. The material of the wall has to be nonflammable such as a metal plate, and do not place flammable materials nearby. „ 3G3AX-RBU21/RBU22/RBU41/RBU42 10 cm min. 5 cm min. 5 cm min. 10 cm min. „ 3G3AX-RBU23/RBU24/RBU43 10 cm min. 5 cm min. 10 cm min. Note. The product cannot be mounted horizontally, but vertically only. Rated Voltage Confirm that the rated voltage of the product is the same as that of the Inverter to be used. 12 min. 10 cm min. 5 cm 10 cm min. 5 cm mi cm m in.