Hardware 3.3.1 Installation Eco Control 667E is designed for installation on carrier rails (in acc. with DIN EN 50022, 35 x 7.5 mm). Procedure 1 Push the device against the carrier rail such that the me- tal spring snaps into the space between carrier rail and installation surface (see illustration). Metal spring 2 Push the device up against the installation wall until it snaps in. Fig. 5: Installation on carrier rail 25