Installation of the RLS 1 WR control unit Installation conditions: Install a flush-mounted box at the installation location of the RLS 1 WR and guide in the connection cable.Remove cover of the RLS 1 WR.Connect the connection cable to the RLS 1 WR → Wiring diagrams.Use 2 screws to secure the RLS 1 WR to the flush-mounted box.Fit cover of the RLS 1 WR.