nest PROTECT User manual

Nest Protect™(Wired 230 V ~ 50 Hz)
Detects smoke and carbon monoxide (CO)
User’s Guide
ATTENTION: Please read carefully, and keep this user’s guide in a safe place.

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First, a word about privacy.
We’re committed to being open and honest about how
we use data. We will always ask for permission before
sharing personally identifiable information like your email
address, and we keep your data safe with the same
security tools that banks use. Go to nest.com/eu/privacy
to learn more about our Privacy Policy.

0560
0843-CPR-024015
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TABLE OF CONTENTS
Meet your Nest Protect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Setup and installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Location in your home. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Placement on the ceiling or wall . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Heads-Up and Emergency Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Daily Use and Emergency Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
General Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
Safety. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Limited Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
Want to see how it’s done? Go to nest.com/eu/installprotect for installation videos and tips.

4 mounting screws
Nest Protect Back plate 230 V AC connector
3 connector blocks
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MEET YOUR NEST PROTECT
Nest Protect is designed to detect smoke and
carbon monoxide in a residential environment.
It has multiple sensors to help it understand
what’s happening in your home, including a
Split-spectrum Sensor to detect a wide range
of slow-smouldering and fast-flaming fires.
The installation of this apparatus should
be carried out by a competent person. This
guide covers the installation of Nest Protect
(Wired 230 V) – model number A14.
Inside the box, you’ll find:
REQUIREMENTS
You need Wi-Fi, an iOS or Android phone or
tablet and a free Nest Account in order to use
some Nest Protect features: spoken room
names, wireless mobile notifications and
software updates. During setup, Wi-Fi and
a free Nest Account are required for wireless
interconnect and room naming. After all the
Nest Protects in your home are connected,
they can communicate with each other
without Wi-Fi.

13.5 cm
(5.3 in)
3.9 cm
(1.5 in)
5
The siren enables
Nest Protect to
alert you with a loud
emergency sound.
The speaker allows
Nest Protect to speak
with a human voice.
The light ring changes
colour to alert you.
Push the Nest button
to silence alarms or
run a test.
Micro-USB connector
(not for normal use).
AC connector pins for
the 230 V connector.
Backup battery
compartment: Three
AA Energizer®Ultimate
Lithium batteries (L91).

6
1. Get the Nest app
Before you install your Nest Protect on the
ceiling or wall, you’ll need to set it up with
the Nest app. Download the app from the
Apple App Store™or Google Play™and create
a free Nest Account. You can use a phone
or tablet for setup.
SETUP AND INSTALLATION
(Professional installation recommended)
The installation of a smoke/CO alarm should
be made by a qualified technician, and all
wiring used to install this alarm should be
made in accordance with with national
regulations. Installation should be done
according to regulations and/or applicable
codes in your local jurisdiction. Permanent
connection to the fixed wiring of the building
should be made in a suitable junction box.
For a complete set of instructions and
warnings, refer to page 24.

Already added New
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Tip: Your Nest Protect came packed in a plastic cover.
Keep the cover on so that your Nest Protect stays clean
until you install it.
Tip: Set everything out on a table for easy setup.
3.Have more Nest Protects?
The Nest app will ask you if you have additional
Nest Protects to set up. If you do, it’ll take
you through a faster setup. Make sure that
you keep all your Nest Protects together until
they’re all set up and ready to be installed.
2.Set up Nest Protect
The Nest app will guide you through each
step: scanning the Nest Protect QR code,
connecting it to the Internet and connecting
it to other Nest Protects in your home. Go to
nest.com/eu/installprotect to watch the video.

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BEDROOMMASTER
BEDROOM
LIVING/
FAMILY
ROOM
KITCHEN
GARAGECELLAR
HALL
AT TIC
MASTER BEDROOMLIVING/
FAMILY
ROOM
DINING
ROOM
KITCHEN
BEDROOMBEDROOM
Location in your home
We recommend placing a smoke alarm
on every floor and a carbon monoxide
alarm in every room containing a fuel-
burning appliance.
The Nest Protect smoke and carbon
monoxide alarm should be installed:
• On every floor (smoke alarms are required
by law in certain residences).
• In every room containing a fuel-burning
appliance (recommended for CO alarms).
• In every bedroom.
• In remote rooms that are used often but
which may be too far away for anyone to
hear an alarm.
• Outside unused rooms, like the boiler room.
Nest Protect should be installed at least 3 m
(10 ft) away from hobs or cooking appliances.
Make sure that there is a clear space
around all installed Nest Protects so that
they are not obstructed.
Nest Protect should NOT be installed in
unfinished attics or garages.

Fuse box
9
5.Turn off the mains power
Protect yourself, and avoid blowing a fuse.
Switch off the correct circuit breaker for the
room where you are installing Nest Protect,
or remove the fuse from the fuse box.
WARNING
ELECTRICAL SHOCK HAZARD
Failure to turn off the power may result in
serious electric shock, injury and death.
Tip: To double-check Nest Protect’s room name,
press the Nest button once. You’ll hear the location
that you assigned to it during setup. It’ll say
something like, “Ready in the bedroom.”
4.Test before you install
Once you’ve finished setting up all your
Nest Protects, make sure that they’ve been
added to your Nest Account. Push the Nest
button on one Nest Protect and follow the
instructions. All your Nest Protects should
speak up. Now you can install them on the
ceiling or wall.

Figure 1
NEST LO
GO
IS UPRIGH
T
ANYWHERE IN
THIS AREA
90 cm
(35 in)
ANYWHERE IN
THIS AREA
90 cm
(35 in)
Figure 2
Figure 3
Figure 4
BEST
HERE
30 cm
(12 in)
Minimum
NOT IN
THIS AREA
CEILING
SIDE
WALL
OK
HERE
NEST LOGO
IS UPRIGHT
15 cm
(6 in)
Minimum
60 cm
(24 in)
Maximum
10
Placement on a sloping ceiling
If you have a sloping, pitched or cathedral
ceiling, Nest Protect should be 90 cm
(35 inches) from the highest peak.
Placement on the ceiling or wall
Installation on the ceiling is recommended.
Use the back plate as a guide to mark where
the screws will go. Make sure that it’s at
least 30 cm (12 inches) away from the wall.

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11
11
7. Remove the old back plate
Unscrew the back plate from the ceiling or
dry lining box. Save the screws for installing
the Nest back plate later. You’ll see one or
two cables coming from the ceiling.
6.Remove your old smoke alarm
To prevent electric shock, make sure that the
green power light is off on the alarm. You may
have to twist the alarm to release it. Remove it
carefully to avoid damaging your ceiling or wall.
There will be two or four wires attached to the
old back plate. Disconnect them all.
Tip: Your old smoke alarm might make a loud noise
when you disconnect it.

Connector block
230 V wire connector
Wire
12
8.Attach the Nest connector
Each cable coming from the ceiling or wall
will have three or four differently coloured
wires. Their colours may vary based on
their age.
Match the live wires coming from the
ceiling to the live wires in the Nest 230 V AC
connector and put them into a connector
block. All the neutral wires go into another
connector block, and the earth wires into
a third terminal block. There is no need for
the Interconnect wire, as Nest Protects
are wirelessly interconnected. If there’s an
interconnect wire, insulate it.
Live wire (brown or marked L)
Neutral wire (blue or marked N)
Earth wire (yellow and green), if present
Interconnect wire (usually black), if present

Connector block
Connector block
Wire
Tip: All smoke alarms prefer to live in a dust-free area,
so remove any dust before you install Nest Protect.
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9.Install the Nest back plate
Screw the Nest back plate to the existing
electrical box, reusing the existing screws.
You can also screw the back plate directly
into the wall or ceiling with the Nest screws.
WARNING
Mixing the live and neutral connections
when connecting alarms will damage
all the alarms – ensure that the
same colours are used throughout
the premises for live, neutral and
interconnect wires (if present).

1
1
2
2
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10. Connect power
Plug the 230 V connector into the back
of your Nest Protect.
11. Install your Nest Protect
Tuck any excess wiring into the dry lining box
first. Line up the three tabs on the back of your
Nest Protect with the notches on the back
plate. Hold Nest Protect against the back plate
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.
Tip: If you ever need to remove it (for cleaning or battery
replacement), turn off power to your Nest Protect
at the fuse box or remove the fuse first. Then turn it
anticlockwise until it disconnects from the back plate.

Fuse box
15
12. Switch mains power back on
or replace the fuse
13. Press to test
Press the Nest 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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HEADSUP AND EMERGENCY ALARMS
ALERTS
When Nest Protect has something to say,
it will speak to you and light up instead of just
beeping. Nest Protect has two kinds of voice
alert: Heads-Up and Emergency Alarm.
When smoke or carbon monoxide levels
are heightened but haven’t yet reached
Emergency Alarm levels, Nest Protect can
sound a Heads-Up as an early warning. Nest
Protect will pulse yellow and tell you where
there’s smoke or carbon monoxide.
You’ll get an Emergency Alarm when smoke
or carbon monoxide reach critical levels.
Nest Protect will pulse red, tell you what room
the emergency is in and sound a loud alarm.
If there’s both smoke and CO present, the
smoke alarm will take priority.
SILENCING
Heads-Up alerts and Emergency Alarms can be
silenced by using the Nest app or pressing the
Nest button. Only silence an alarm once you
have checked conditions at the Nest Protect
that first sounded the alarm. Do not silence Nest
Protect by disconnecting it from mains voltage
and removing the batteries. This will disable the
alarm so that it cannot sense smoke or carbon
monoxide, leaving you at risk.
Because there are many different types of fire,
you may experience an Emergency Alarm without
having first having experienced a Heads-Up
alert. This means that critical levels of smoke or
CO occurred extremely quickly and Nest Protect
had to sound the Emergency Alarm.
HAVE MORE THAN ONE NEST PROTECT?
After all the Nest Protects in your home are
connected to each other, if there’s a Heads-Up
or an Emergency Alarm in one room, they’ll all
tell you what the danger is and which room it’s in.
If multiple Nest Protects are interconnected,
a Heads-Up alert or Emergency Alarm can be
silenced only at the Nest Protect that originally
sounded the alert. You’ll need to go to that room
to silence all the Nest Protects in your home.
Always check the conditions near the Nest
Protect that first detected the smoke or carbon
monoxide before silencing it.

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(Alarm siren)
“EMERGENCY. THERE’S
SMOKE IN THE
[ROOM NAME].”
WHAT YOU HEAR
ALERTSSILENCING
WHAT IT MEANS WHAT TO DO
“PLEASE BE AWARE.
THERE’S SMOKE IN THE
[ROOM NAME]. THE
ALARM MAY SOUND.”
Smoke levels are rising. Put out the source of the
smoke. Then use the Nest
app or press the Nest
button to silence the alert.
Open a window or door
to get fresh air. Then use
the Nest app or press the
Nest button to silence
the alert.
Get out of the house
immediately.
Make sure you’re safe and
have put out the source of
smoke or carbon monoxide.
Make sure you’re safe and
have put out the source of
smoke or carbon monoxide.
1) Keep calm and open all
doors and windows.
2) Stop using all fuel-burning
appliances and ensure
that they are turned off.
3) Evacuate the premises
if the CO alarm continues
to sound.
4) Call 999 or the fire brigade
from outside.
Carbon monoxide
levels have been high
for a while.
You’ve silenced an
alert.Nest Protect will
now keep quiet, unless
smoke or carbon
monoxide remains at
critical levels.
Smoke or carbon
monoxide levels
are decreasing.
The carbon monoxide in
the room has reached
critical levels.
“PLEASE BE AWARE.
THERE’S CARBON
MONOXIDE IN THE
[ROOM NAME]. THE
ALARM MAY SOUND.”
(Alarm siren)
“EMERGENCY. THERE’S
CARBON MONOXIDE
IN THE [ROOM NAME].
MOVE TO FRESH AIR.”
“SMOKE ALARM SILENCED.”
“CARBON MONOXIDE
ALARM SILENCED.”
“THE ALARM IS OVER.”
YELLOW pulses.
YELLOW pulses.
RED pulses.
RED pulses.
YELLOW or
RED pulses.
GREEN pulses.
WHAT YOU SEE
HEADSUP AND EMERGENCY ALARMS
The smoke in the
room has reached
critical levels.

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DAILY USE
POWER
Nest Protect (Wired 230 V) has a small green
light located at the top of the Nest button.
It will be on as long as Nest Protect is getting
AC power from the electrical wires.
If there’s a wiring problem or power cut, the
green light will turn off and Nest Protect will
switch to backup batteries. You’ll also see a
yellow (instead of green) Nightly Promise light
when you turn off the lights for the night.
NIGHTLY PROMISE
Nest Protect continuously tests itself, so you
don’t have to wonder if it’s working. Nightly
Promise reports on every Nest Protect in
your home.
When you turn off the lights for the night, Nest
Protect will glow green for a moment – this
means that everything is working. If it glows
yellow, one of the Nest Protects in your home
needs your attention. For instance, the batteries
are low, Wi-Fi is down or there’s a problem with
the sensors. Just push the Nest button or use
the Nest app to see what’s wrong.
PATHLIGHT
Nest Protect usually has its light turned off, but
it can light your way as you walk underneath it
in the dark. You can enable or disable Pathlight
and set its brightness with the Nest app.
Nest Protect (Wired 230 V) also allows you to
set Pathlight to “Always On” if you want a night
light. It will turn on when it’s dark and stay on
until it’s light again.
DAILY USE AND EMERGENCY PREPARATION
EMERGENCY PREPARATION
TESTING
We recommend running a weekly manual test.
During a test, all interconnected Nest Protects
in your home check their sensors, power,
Wi-Fi connection, emergency siren, speaker
and microphone.
When you run a test, Nest Protect will give you
a countdown before sounding the alarm so that
you have time to move away from the loud noise.
Test procedure:
1. Start a test by pressing the Nest button twice.
2. Nest Protect will say: “This is only a test. The
alarm will sound.”
3. Ensure that the alarm sounds and the light
illuminates on each Nest Protect.
4. Once the Nest Protect has made sure it’s
working, it’ll tell you that everything’s OK.
If you have interconnected Nest Protects,
all of them should speak.

19
GREEN light above
the Nest logo.
Nest Protect is working.
The green light means
AC power is connected.
WHAT YOU HEAR WHAT IT MEANS WHAT TO DOWHAT YOU SEE
DAILY USE AND EMERGENCY PREPARATION
WARNING
• DO NOT stand close to the alarm when
the siren is sounding. Exposure at close
range may be harmful to your hearing.
When testing, move away before the siren
starts sounding.
• If the alarm ever fails to test correctly,
have it replaced immediately! If the alarm
is not working properly, it cannot alert you
to a problem.
• DO NOT use a match, cigarette or any other
makeshift fire to test the smoke alarm.
• NEVER use vehicle exhaust to test the CO
alarm! Exhaust may cause permanent
damage and will void your warranty.
• NEVER use an open flame of any kind
to test this alarm. You might accidentally
damage or set fire to the unit or to
your home.
Nest Protect has tested
its sensors and batteries
to confirm that they are
working correctly.
DAILY USEEMERGENCY
PREPARATION
You turn off the
room lights for
the night, and
the GREEN light
pulses once.
WHITE light.
BLUE rotates.
Sleep well, thanks
to Nightly Promise.
Press the Nest button.
Nest Protect will walk you
through the next steps.
Pathlight lights your way at
night as you pass under it.
It can also be set to stay on.
To set up or run
a manual test.
“READY. PRESS TO TEST.”

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3
2
1
3
2
1
2. Twist Nest Protect anticlockwise until it
disconnects from the back plate.
3. Detach the power connector
from the back of Nest Protect
and open the battery door.
4. Replace the batteries. Align
the + positive and - negative
ends with the markings in
the battery compartment.
5. Close the battery
compartment. Do not force the door closed.
6. Re-attach the power connector.
7. Push Nest Protect onto the back plate and
turn it clockwise until you feel it grip.
8. Turn mains power to Nest Protect back on or
replace the fuse.
9. Press the Nest button twice.
GENERAL MAINTENANCE
CLEANING YOUR NEST PROTECT
Nest Protect has been designed to be as
maintenance free as possible, but you should
keep it clean. As with any smoke alarm, dust
build-up on the outside or inside of Nest
Protect can stop it from working properly.
To clean Nest Protect:
1. Turn off mains power to Nest Protect or
remove the fuse (see p.9).
2. Remove it from the wall or the ceiling (turn
anticlockwise until it comes off the back
plate and detach the power connector).
3. Wipe the outside with a clean, slightly damp
cloth. Don’t use soap or solvents.
4. Place Nest Protect on a soft, dry cloth with
the Nest button facing down. Open the
battery compartment door and remove the
batteries. Remove the screws and lift off
the back. Be careful not to lose the screws.
5. Gently vacuum the inside. Make sure that
you clean all the way around the mesh sides
of the smoke chamber (the large
metal circle).
Note: Never use detergents or solvents (like
glass cleaner) on your Nest Protect, and do
not spray air fresheners, hair spray or other
aerosols near it. Do not get water inside the
alarm or paint over it.
REPLACING THE BACKUP BATTERIES
If there is a power cut, Nest Protect will
use three AA Energizer®Ultimate Lithium
batteries (L91) for backup. These batteries
can be purchased at your local retailer.
1. Turn off mains power to Nest Protect or
remove the fuse (see p.9).
WARNING
• Only use batteries specified by Nest. Use
of a different battery model will have a
detrimental effect on the operation of the
smoke alarm. The alarm may not operate
properly with other batteries. Never use
rechargeable batteries, as they may not
provide a constant charge.
• Never remove the batteries from a
battery-operated alarm to stop an
unwanted alarm (caused by cooking
smoke, etc.). Removing batteries disables
the alarm so that it cannot sense smoke
or carbon monoxide, leaving you at risk.