Google Nest Protect Guide De L'utilisateur page 15

12. Install your Nest Protect
First, tuck any excess wiring into the electrical box.
Line up the three tabs on the back of your Nest Protect
with the notches on the backplate. Hold Nest Protect
against the backplate and turn it clockwise. Continue
turning until it's square with the wall or ceiling. Install
the rest of your Nest Protects if you have more.
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Tip: If you ever need to remove it (for cleaning or
battery replacement), turn off power to your Nest
Protect at the breaker box or remove the fuse first.
Then turn counterclockwise until it disconnects from
the backplate.
All manuals and user guides at all-guides.com
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13. Switch power back on or replace the fuse
Breaker box
8. Press to test
Press the button on one Nest Protect. It will tell you
what to do next. Every Nest Protect in the house
should speak up, confirming that they're connected
to each other.
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