Interlogix TruVision IP Megapixel PTZ Installation Manual - Manual (Page 9)

Installation Guide 9
6. Adjust the height of the two housing tabs by turning the
screw on which they are attached. The distance (h) of
the tabs from the housing ring must be greater than the
thickness of the ceiling.
Housing tab
Screw
7. Make sure the housing tab is closed and then PUSH the
housing into the pass-through hole. Hold the housing
and fix it by screwing the housing tabs down to the
mounting surface
8. Insert the PTZ module into the housing:
9. Re-attach the bubble by screwing it to the housing.