nest O5C User manual

Nest Protect (Wired 120V ~ 60Hz)
Detects smoke and carbon monoxide (CO)
User’s Guide
ATTENTION: Please read carefully and save this user’s guide in a safe place.
Page: 1

Nest Protect Backplate 120V connector
Four mounting screws
Three wire nuts
32
MEET YOUR NEST PROTECT
Inside the box you’ll find:
Nest Protect is designed to detect smoke and carbon monoxide in a residential environment.
Its eight sensors work together to understand what’s happening in your home and its
photoelectric sensor detects slow, smoldering fires. Nest Protect can be used as a single
station or multiple station alarm.
This guide covers the installation of Nest Protect (Wired) - Model number O5C.
Requirements
Wi-Fi, an iOS or Android smartphone or tablet, and a free Nest Account are required for wireless
interconnect, room naming, mobile notifications and software updates. After all the Nest
Protects in your home are connected, they can communicate with each other without Wi-Fi.
Table of contents
Meet your Nest Protect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Location in your home. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Placement on the ceiling or wall. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Placement on a sloped ceiling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Setup and installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Operating instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Heads-up and emergency alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Testing Nest Protect. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
General maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Safety. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Alarm limitations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Installation code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
AC installation warnings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Carbon monoxide (CO) precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Fire safety precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Federal Communications Commission (FCC) compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Mobile notifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Nest Labs, Inc.Limited Warranty Nest Protect Smoke + Carbon Monoxide Alarm . . . . . . . . . . . . . . . . . . . . . . 28
Page: 3Page: 2

5.28"
(13.4cm)
1.63"
(4.1cm)
54
Horn enables Nest Protect
to alert you with a loud
emergency sound.
Speaker allows Nest Protect
to speak with a human voice.
Light ring changes
color to alert you.
Push the Nest button to
hush alarms and run a test.
Micro-USB connector
(not for normal use).
AC connector pins for the
120V connector.
Backup battery
compartment:
3 AA Energizer® Ultimate
Lithium batteries (L91).
LOCATION INYOUR HOME
The National Fire Protection Association recommends installing a smoke alarm in the following areas:
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the entry of the stairs.
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be required.
Nest Protect should be installed at least 10 ft (3 m) away from cooktops or cooking appliances.
Nest Protect should NOT be installed in unfinished attics or garages.
Page: 5Page: 4

Figure 1
Figure 4
Figure 2 Figure 3
76
PLACEMENT ON THE CEILING OR WALL
Installing on the ceiling is recommended. Mark where the screws will go using the base as a guide.
Make sure it’s at least 4 inches (10 cm) away from the wall.
PLACEMENT ON A SLOPED CEILING
If you have a sloped, peaked or cathedral ceiling, Nest Protect should be 4 inches to 3 feet
(10 cm – 1 m) from the highest point.
Page: 7Page: 6

Messages
Smoke is clearing
Living Room
TODAY,1:25 PM
Smoke is clearing
LivingRoom
TODAY,1:25 PM
Emergency
LivingRoom
TODAY,1:25 PM
Heads-Up
LivingRoom
Thereis smoke in the living room.
Thealarm may sound.
Breaker box
22
1
98
5.Turn off power
Protect yourself and avoid blowing a fuse.
Switch off the correct circuit breaker or remove
the fuse from the fuse box.
6.Remove your old smoke alarm
Make sure the green LED on the old alarm is off
then pull your old smoke alarm off its base, and
disconnect its power wires.
Your old smoke
alarm might
make a really
loud noise when
you disconnect it.
7. Remove the old base
Unscrew the base plate from the electrical box.
Save the screws for later.
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 articles 210, and
300.3B of the National Electrical Code ANSI/
NFPA 70, NFPA 72, and/or applicable codes in
your local jurisdiction.
For a complete set of instructions and
warnings, refer to page 22. WARNING
ELECTRICAL SHOCK HAZARD
Failure to turn off the power may result in
serious electrical shock, injury and death.
SETUPAND INSTALLATION
(Professional installation recommended)
Tip: Lay everything out on a table for an easy installation.
2.Wake it up
Remove the dust cover and pull out the battery
tab to wake up your Nest Protect.
3.Press the Nest button
Nest Protect will glow blue when it’s awake.
1. Get the Nest Mobile app
You’ll use the Nest Mobile app to get Nest
Protect connected to your Wi-Fi, to the Internet,
and to additional Nest Protects in your home.
4.Set up Nest Protect
The video at nest.com/protect/installation
shows how.
The app will guide you through creating a
free Nest account, pairing your Nest Protect
securely, and telling Nest Protect which room
it’s in.

White:
Neutral line
Black:
Power line
Bare copper
Red/orange/yellow:
Interconnect
1110
9.Attach the Nest 120V connector
Just match the wires - white to white and black
to black. Press the wires together, cap them
with a wire nut and twist clockwise. Tighten
until it is secured. There is no need for the
red/orange/yellow wire. Cap it with a wire nut.
10. Install Nest Protect backplate
Screw the backplate to the existing electrical
box, reusing the existing screws. (Alternately,
you can screw the plate directly into the wall
or ceiling with the Nest screws.)
Refer to the diagrams on pages 6 and 7 for
proper placement of your Nest Protect.
11. Connect power
Plug the 120V connector into the back of your
Nest Protect.
12. Mount your Nest Protect
First, tuck any excess wiring into the
electrical box and line up Nest Protect with
the backplate.
Second, give it a slight twist clockwise.
It’ll CLICK into place.
13. Switch power back on or replace
the fuse
Breaker box
15. Have more smoke alarms?
Repeat steps 1-14 to install more Nest Protects.
The Nest app will help you connect them to
Wi-Fi and add them to your Nest Account.
Test that all your Nest Protects are wirelessly
connected by pushing the Nest button twice on
one Nest Protect. If they’re connected, every
Nest Protect in the house will speak up. Walk to
each one to make sure you hear them talking.
14. Press to test
Press the Nest button and follow the spoken
instructions to test. Your Nest Protect will run a
test and tell you when it’s done.
3/8”
The exposed wire
should be straight.
8.Remove the old connector
Unscrew the wire
nuts to detach the
120V connector
from your old
smoke alarm.
Page: 11Page: 10

1312
OPERATING INSTRUCTIONS
When the Nest Protect smoke and carbon monoxide (CO) alarm has something to say, it will speak to you
in words and colors instead of just beeping. It has two kinds of alerts: Heads-Up and Emergency Alarms.
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Alarm, Nest Protect gives you a friendly spoken Heads-Up to warn you in advance. It pulses yellow
and speaks to you, telling you what and where the danger is.
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emergency is and pulses red, in addition to making a loud alarm sound. This is an Emergency Alarm.
Page: 13Page: 12

2 ftto 8 ft
61 cm to 2
m
1514
WARNING
Before waving at Nest Protect to silence it,
identify the source of the danger and make
sure you’re safe.
WHICH ALERTS CAN BE SILENCED
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Nest Wave or the Nest button.
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Nest Wave or the Nest button if smoke reaches
a critical level.
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fires, you may experience an Emergency
Alarm without having first experienced a
Heads-Up alert. This means that dangerous
levels of smoke or CO occurred extremely
quickly and Nest Protect must sound the
Emergency Alarm.
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connected to each other, whenever there’s a
Heads-Up or an Emergency Alarm in one room,
they will all tell you what and where the danger
is. So go to that room and wave at the Nest
Protect there to hush every Nest Protect in the
home. This will ensure that you will identify the
source of the danger in that room.
WARNING
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wireless device will vary depending on its
surroundings.
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outdoors or to transmit between buildings.
The alarms will not communicate properly
in those conditions.
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interfere with signals from wireless alarms.
Test your Nest Protects with metal doors
opened and closed.
PATHLIGHT
Usually Nest Protect has its light turned off,
but it will light your way as you walk underneath
it in the dark. You can enable or disable
Pathlight from the Nest Mobile app.
HEADS-UPAND EMERGENCY ALARMS
ALERTS
Nest Protect has two kinds of voice alerts:
Heads-Up and Emergency Alarms. A Heads-Up
is friendly warning before conditions get
dangerous. Nest Protect pulses yellow and
tells you where smoke or carbon monoxide is.
An Emergency Alarm occurs when smoke or
carbon monoxide reach dangerous levels.
Nest Protect pulses red, makes a loud alarm
sound and tells you what room the emergency
is in. The smoke alarm takes precedence when
carbon monoxide is also present.
NEST WAVE™
You can silence Heads-Up and most Emergency
Alarms by pushing the Nest button or by standing
under Nest Protect and waving your arm.
To use Nest Wave, move close to Nest Protect.
When it sees you, its light ring will glow a solid
color. Stay in that spot and wave your whole arm
until the alarm is hushed. Your hand should be
2 ft - 8 ft (60 cm to 2 m) away from Nest Protect.
Dense smoke will override Nest Wave and sound a
continuous alarm.
WIRELESS INTERCONNECT
Nest Protects connect wirelessly to each other
so that when one speaks, they all speak. That
means when one Nest Protect raises any kind
of alerts, every Nest Protect in the house will
tell you in which room the smoke or CO is in. For
example, if you’re in the bedroom and the alarm
goes off in the basement, the Nest Protect in
the bedroom will speak up and relay that alarm
so that you know where the danger is. To silence
the alert, go to that room and wave at the Nest
Protect there. That will hush every Nest Protect
in the house.
Nest Protect’s 120V connector does not have
a red/orange/yellow wire for interconnect as it
connects wirelessly. There’s no need to connect
any wire to the red/orange/yellow interconnect
wire from the ceiling/wall.
Nest Protects can typically communicate
with each other if they’re 50 ft (15m) apart
inside a home. Some features of a home may
reduce their range, including the number of
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of building material, suspended ceilings,
ductwork, large metallic appliances and
metal studs. This kind of interference can be
overcome by adding more Nest Protects that
can route wireless signals around obstructions.
Nest Protect - Battery (model number 05A) and
Nest Protect - Wired 120V (model number 05C) are
compatible and can be interconnected wirelessly.
Nest Protect wireless interconnect will not
work with other products from other brands.

1716
GENERAL MAINTENANCE
CLEANING YOUR NEST PROTECT
Like any photoelectric smoke alarm, Nest
Protect can get dusty. Do not clean it with
detergents or solvents (like Windex®) and do
not spray air fresheners, hair spray or other
aerosols near it. To dust Nest Protect:
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across the entire backplate and alarm.
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that says Nest. This is the smoke chamber.
Do not get water inside the alarm or paint over it.
RESETTING NEST PROTECT
You can reset Nest Protect to erase all your
settings and reset the wireless interconnection
between Nest Protects. You may want to do this
before you move to a new house.
You’ll need to press and hold the Nest button
on Nest Protect to erase its settings. Follow the
steps below for each Nest Protect you want to
reset. You can’t erase the settings on your Nest
Protect from the Nest app.
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and glow blue.
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its version number. Then release the button.
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tell you it’s erasing all settings. You can cancel by
pressing the Nest button during the countdown.
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Your Nest Protect will still detect smoke and
carbon monoxide after being reset. You can see
complete instructions at nest.com/protect/reset
Test procedure
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alarm may sound.”
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sure it’s working, it’ll tell you everything’s okay.
If they are interconnected, every Nest Protect
will speak up in the house. Walk to each one to
make sure you hear them.
WARNING
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have it replaced immediately! If the alarm
is not working properly, it cannot alert you
to a problem.
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makeshift fire to test the smoke alarm.
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exhaust! Exhaust may cause permanent
damage and voids your warranty.
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test this alarm. You might accidentally
damage or set fire to the unit or to your
home. The built-in self test accurately
tests the unit’s operation as required by
Underwriters Laboratories, Inc. (UL).
TESTING NEST PROTECT
SELF-MONITORING
Nest Protect continuously tests itself, so you
don’t have to wonder if it’s working.
When you turn out the lights for the night,
Nest Protect will glow green for a moment -
that means everything is working. If it glows
yellow, this means Nest Protect has detected
something wrong that needs your attention. Just
wave at it or push the Nest button to hear its
warning: either the batteries are low, Wi-Fi has
been down or there is an issue with its sensors.
TEST NEST PROTECT MANUALLY
Regulations require a weekly manual test.
After installation, test Nest Protect by pressing
the Nest button twice. Before sounding the
alarm, Nest Protect will give you a countdown so
that you have time to move away from the alarm.
WARNING
DO NOT stand close to the alarm when
the horn is sounding. Exposure at close
range may be harmful to your hearing.
When testing, step away when horn
starts sounding.
BACKUP BATTERY
In case of power outage, Nest Protect will use its
backup battery.
3 AA Energizer® Ultimate Lithium batteries (L91)
These backup batteries can be purchased at
your local retailer.
Nest Protect will let you know its backup
batteries are getting low before they need to
be replaced. Instead of lighting up green during
Nightly Promise, it’ll glow yellow. Once you wave
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Replace it soon.”
WARNING
Use only batteries specified by Nest. Use
of a different battery model will have a
detrimental effect on the smoke alarm
operation.
Never disconnect a wired alarm to stop an
unwanted alarm (caused by cooking smoke,
etc.). Removing power disables the alarm so
it cannot sense smoke, and removes your
protection. Instead open a window or fan
the smoke away from the unit.
The backup battery cannot work until
you install the battery in the correct
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Page: 17Page: 16

1. First battery
2. Second battery
3.Third battery. This
battery will push the
bracket into place.
1
2
3
1918
ALARM LIMITATIONS
LIMITATIONS OF SMOKE ALARMS
Alarms reduce deaths resulting from home fires
worldwide. However smoke alarms can only
work if they are properly located, installed and
maintained, and if smoke reaches the alarms.
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Make sure you create an escape plan and you
practice fire drills with all members of the family.
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If they are powered by batteries, the smoke
alarms cannot work if the batteries are missing,
dead or disconnected. If they are wired, the
smoke alarms cannot work during a long power
outage and once the back up battery is dead.
Nest Protect will warn you in advance when
batteries are running low so that you can
replace them.
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while the dust cover is in place. The dust cover
must be removed.
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does not reach the alarms. For example, if a
door is closed, smoke may not reach the smoke
alarm. This is why you should have a smoke
alarm in each bedroom and in the hallways as
bedroom doors may be closed at night.
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the smoke alarm comes with a loud horn of
85 decibels, it may not be heard if : 1) people
have consumed alcohol or drugs, 2) the alarm
is drowned by noise from stereo, TV, traffic, air
conditioner or other appliances, 3) residents
are hearing impaired or have high frequency
hearing loss associated with aging. Special
smoke alarms should be installed for those
who are hearing impaired.
REPLACING THE BACKUP BATTERIES
1. Remove your Nest Protect from its backplate.
2. Using a Phillips screwdriver, unscrew the two
screws from the battery door on the back of
Nest Protect.
3. Replace the batteries. Make sure to use
Energizer Ultimate Lithium batteries and
install them in the right order. If you install
them out of order, you may not be able to close
the battery compartment.
4. Reattach the battery door by sliding it into the
tabs located on the opposite side from
the batteries, replacing the screws and then
reattaching Nest Protect back to its base.
5. Press the Nest button to run a test.
SERVICING
Step 1: Before sending Nest Protect for service,
visit nest.com/support
Step 2: If your Nest Protect needs servicing,
first contact our support team to get a return
number. Step 3: Send it to
Nest Labs
(YOUR RETURN NUMBER)
4 East Stow Road
Marlton, NJ 08053 USA
RECYCLING AND DISPOSAL
Visit www.nest.com/recycle
EXPIRATION
Nest Protect has a limited life like any smoke/
CO alarm. Nest Protect lifetime is 7 years.
You will need to replace Nest Protect after
7 years with a brand new Nest Protect. Check
the date of replacement written on the back
of Nest Protect.
WARNING
You’ll no longer be protected from smoke or
CO if you don’t replace your Nest Protect.
About two weeks before it expires, Nest
Protect will light up with a yellow light. Wave at
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expired. Replace it now.” Buy a new alarm and
recycle the expired one. Make sure you test your
new Nest Protect once it’s installed.
SAFETY
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