Google Nest Hello Manual page 7

Step 10: Replace the chime cover
Now put the chime's cover back on.
Step 11: Disconnect the current doorbell
Remove your current doorbell and disconnect the wires. You'll need a
screwdriver for this step.
Step 12: Use the wedge if needed
If the doorbell is located in a corner, you can use the included wedge to
change the viewing angle. This will point Nest Hello away from the wall
and help prevent the IR night vision light from washing out the video.
You can flip the wedge to angle the camera in the opposite direction.
The wedge has adhesive strips. Just stick it onto the wall plate.
Step 13: Mark holes for the wall plate
● Now mark screw holes for installation with the backplate.
Important: You may not be able to re-use the screw hole from your old
doorbell. The doorbell wires must come through the bottom of Hello's
wall plate hole (as pictured). If they don't, they can prevent Nest Hello
from locking onto the wall plate.
● Again, make sure the Nest logo is at the bottom.
● Use a bubble level to check that the wall plate is straight.
Step 14: Install the wall plate
● Drill pilot holes with either a 3/32nd drill bit, hammer drill, or use
the included masonry bit and wall anchors if you're drilling into
stone, stucco, or other hard materials.
● Install the screws. Make sure the Nest logo is at the bottom. The
wall plate is not reversible.
● Use a bubble level to double check that the plate is level. The
horizontal screw hole on the plate's bottom will let you
straighten the backplate if needed.
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