AMX Metreau Entry Communicator with Display MET-ECOM-D - Manual (Page 28)

Mounting and Installation
22 Metreau Entry Communicators
4. Install the 2 drywall screws and expansion clips into the 2 locations along both sides of the wall box.
5. Insert the wall box and expansion clips into the cutout until the rim of the wall box is flush against
the wall.
6. Tighten the 2 drywall clip sets (screws and clips) until the wall box is flush against the wall
(FIG. 19).
7. Place the lug of the ground wire on the device and the Earth ground wire around the provided screw
and connect them both to the point shown in FIG. 17.
Replacement drywall clip sets must be ordered from AMX.
FIG. 19 Wall Surface Installation (Using Expansion Clips)
Do not over-torque the screw; doing so can cause the unit to not function properly
The device and wall box must have an Earth ground.