Installation 2-9
2.2 Installation of the Main Unit
2.2.5 Frame Earth Connection
IMPORTANT!!!
You must connect the frame of the main unit to Earth.
2.2.6 Opening Front Cover
Two screws are attached to the front cover by springs so that they
will not be lost. To open the front cover of the main unit:
1. Loosen the two screws on the right side of the main unit.
2. Open the front cover in the direction of Arrow .