Congratulations on your purchase of a
Honeywell Wi-Fi programmable thermostat.
When registered to Honeywell’s Total Connect
Comfort Solutions, you can remotely monitor
and control the heating and cooling system
in your home or business—you can stay
connected to your comfort system wherever
you go.
Honeywell’s Total Connect Comfort is the
perfect solution if you travel frequently, own
a vacation home, a business or manage an
Investment property or if you are simply looking
for peace of mind.
This thermostat works with common 24 volt systems such as forced air, hydronic,
heat pump, oil, gas, and electric. It will not work with millivolt systems, such as a gas
fireplace, or with 120/240 volt systems such as baseboard electric heat.
MERCURY NOTICE: Do not place your old thermostat in the trash if it contains
mercury in a sealed tube. Contact the Thermostat Recycling Corporation at
www.thermostat-recycle.org or 1-800-238-8192 for information on how and
where to properly and safely dispose of your old thermostat.
NOTICE: To avoid possible compressor damage, do not run air conditioner if the
outside temperature drops below 50°F (10°C).
Need help?
Visit wifithermostat.com or call 1-855-733-5465 for assistance before returning the
thermostat to the store.
• Connect to the Internet to monitor and control your heating/cooling system
• View and change your heating/cooling system settings
• View and set temperature and schedules
• Receive alerts via email and get automatic upgrades
Your new thermostat provides:
• Smart Response Technology
• Compressor protection
• Heat/cool auto changeover
69-2718EF—01 4
Controls and home screen quick reference
Once your Wi-Fi thermostat is installed, it will display the home screen. Portions of this
display will change depending on how you are viewing it.
Set up messages
describe steps in the
Wi-Fi set up process
Set clock, day,
or schedule
Select fan
settings
HOLD
M31586
Select system
mode
Wi-Fi status
Temperature adjustment
buttons
Permanent override
button
Additional
settings
The screen lights when you press any button. It stays lit for 8 seconds after you complete
changes.
5 69-2718EF—01
Preset energy-saving schedules
This thermostat is pre-set with energy-saving program settings for four time periods.
Using the default settings can reduce your heating/cooling expenses by as much as 33%
if used as directed. Savings may vary depending on geographic region and usage. To
change the settings, see pages 39–41.
Default Heat SettingsDefault Cool Settings
WAKE
6:00 am
LEAVE
8:00 am
RETURN
6:00 pm
SLEEP
10:00 pm
69-2718EF—01 6
70
62
70
62
°
°
°
°
78
85
78
82
°
°
°
°
Setting up your thermostat
Setting up your Wi-Fi programmable thermostat is easy. It is preprogrammed and ready to
go as soon as it is installed and registered.
Install your thermostat.
1
Connect your home Wi-Fi network.
2
Register online for remote access.
3
Before you begin, you may want to watch a brief installation video. Use
the QR Code
7 69-2718EF—01
®
at the front of this guide, or go to wifithermostat.com/support
Installing your thermostat
You might need the following tools to install this thermostat:
• No. 2 Phillips screwdriver
• Small pocket screwdriver
• Pencil
• Level (optional)
1 Switch OFF power to your
heating/cooling system.
Important! To protect your equipment,
switch OFF the power to your heating/
cooling system at the breaker box or
the system switch.
69-2718EF—01 8
• Drill and bits (3/16” for drywall,
7/32” for plaster) (optional)
• Hammer (optional)
• Electrical tape (optional)
Circuit breaker
box
or
Heating/cooling
system power
switch
Installing your thermostat
2 Remove old thermostat faceplate
and leave wires connected.
2a Take a picture of the wire
If you have an older thermostat with a
sealed mercury tube, turn to page 2
for proper disposal instructions.
connections for later reference.
2b If no wire is connected to a terminal
labeled C or no C terminal exists
on the old thermostat, view the
Alternate Wiring videos at
wifithermostat.com/videos
C
C
Important! C wire is required and
is the primary power source for
your thermostat. Without a C wire,
your thermostat will not power up.
9 69-2718EF—01
Terminal
designation
Installing your thermostat
3 Label wires.
Do not label by wire color.Use
the supplied sticky tags to label
each wire as you disconnect it.
Label wires according to the old
thermostat terminal designations,
not by wire color.
Note: If no tag matches a wire
terminal label, write the terminal
label on a blank tag.
4 Remove wallplate.
Remove the old wallplate from
the wall after all wires have been
labeled and disconnected.
69-2718EF—01 10
Sticky tags
Blank sticky
tags
C
C
Terminal
designation
Installing your thermostat
5 Separate Wi-Fi thermostat and its
wallplate.
On your new thermostat, grasp the
Thermostat
Finger holds
finger holds on the top and bottom of
the wallplate with one hand and the
thermostat (front) with the other hand.
PULL HERE
TO REMOVE
Pull pieces apart.
PULL HERE
TO REMOVE
M33856
Wallplate (back view)
11 69-2718EF—01
Installing your thermostat
MCR33857
6 Mount wallplate for Wi-Fi thermostat.
Mount your new wallplate using screws and anchors
included with the thermostat.
If necessary:
Drill 3/16-in holes for drywall.
Drill 7/32-in holes for plaster.
Note: You may be able to use your existing
wall anchors. Hold the wallplate up to the
existing anchors to check for alignment
Wallplate
69-2718EF—01 12
Installing your thermostat
Important! The Wi-Fi thermostat requires a C wire to operate. The C, or common, wire
brings 24 VAC power to the thermostat. Many older mechanical or battery operated
thermostats do not require a C wire. If you don’t have a C wire, try:
• Looking for an unused wire that is pushed into the wall. Connect that wire to C and
check that it is connected to the 24 VAC common at your heating/cooling system.
Note: Not all heating/cooling systems label the 24 VAC common C. Check your system
manual or contact the manufacturer to find out which terminal is the 24 VAC common.
View the Alternate Wiring videos at wifithermostat.com/videos
Wiring
For conventional heating/cooling systems (natural gas, oil or electric furnace, air
conditioner), see page 14. See “Glossary” on page 64 for further definition.
For a heat pump system, see page 15. See “Glossary” on page 64 for further
definition.
13 69-2718EF—01
Installing your thermostat
Wiring (conventional system)
7A Wire the Wi-Fi thermostat to your conventional system.
a Starting with the C Wire, match the sticky tag on the
wire to the terminal labels.
You must have a C wire. See page 13.
b Loosen screw, insert wire on inside edge
of terminal, then tighten screw.
c Verify wire is firmly secured by gently
pulling on wire.
d Repeat steps a–c for all other wires.
e Push any excess wire back into the wall
opening after all wires are installed.
f Continue to page 20.
Labels don’t match? See alternate
wiring key on pages 16–17.
69-2718EF—01 14
Remove metal jumper
only if you have both
R and RC wires
W
G
Y
R
C
C
G W
Y2
W2
AUX/E
L
G O/B
YR RCK
CONVENTIONAL
C
YRRCK
HEAT PUMP
Note: The wiring for your
application might be different
from the shown above.
Installing your thermostat
Wiring (heat pump system only)
7B Wire Wi-Fi thermostat to your heat pump.
Labels don’t match? See alternate
wiring key on pages 18–19.
a Starting with the C Wire, match the sticky tag on the wire to the terminal labels.
You must have a C wire. See page 13.
b Loosen screw, insert wire on inside edge
of terminal, then tighten screw.
c Verify wire is firmly secured by gently
pulling on wire.
O
G
Aux
R
Y
d Repeat steps a–c for all other wires.
e Push any excess wire back into the wall
opening after all wires are installed
f
Continue to page 20.
Note: If old thermostat has separate wires on AUX and
E, place both wires into the E/AUX terminal.
If old thermostat has wire on AUX with a jumper to E,
place wire on E/AUX terminal. No jumper is required.
15 69-2718EF—01
.
AUX/E
L
G O/B
C
YRRCK
HEAT PUMP
Note: The wiring for your
application might be different
from the wiring shown above.
Installing your thermostat
MCR33885
Alternate wiring (conventional system)
Use this if your wire labels don’t match the terminal labels.
Y2
Note: You must have
a C wire or equivalent.
See page 13.
W2
C
W1F
X
H
B
C1
2
RYWG
RC
R
RHY1
4M
V
1
W2
G W
Y2
K
69-2718EF—01 16
C
YRRC
CONVENTIONAL
3
See key to
on page 17.
1
– 3
Installing your thermostat
Alternate wiring key (conventional system)
1
Do not use K terminal. For future use.
If your old thermostat had both R and RH wires, remove metal jumper.
2
Connect the R wire to the RC terminal, and the RH wire to the R terminal.
Remove metal jumper connecting R and RConly if you must connect both
3
R and RC.
17 69-2718EF—01
Installing your thermostat
Alternate wiring (heat pump system only)
Use this if your wire labels don’t match the terminal labels.
3
Note: You must have
a C wire or equivalent.
See page 13.
EAUX
L
XW FH
F
X2
1
2
4
OG
W1
W2
5
4
C
X
B
B
6
RY
RC
R
VY1
VRM
7
AUX/E
L
69-2718EF—01 18
G O/B
C
YRRCK
HEAT PUMP
MCR33886
See key to
1
– 7
on page 19.
Installing your thermostat
Alternate wiring key (heat pump system only)
Do not use K terminal. For future use.
1
If old thermostat has separate wires on AUX and E, place both wires into the E/AUX terminal. If
2
old thermostat has wire on AUX with a jumper to E, place wire on E/AUX terminal. No jumper is
required.
If your old thermostat had an O wire and not a B wire, attach the O wire to the O/B terminal.
3
If your old thermostat had separate O and B wires, attach the B wire to the C terminal. If
4
another wire is attached to the C terminal, check wifithermostat.com for help. Attach the O wire
to the O/B terminal.
If your old thermostat had separate Y1, W1 and W2 wires, check wifithermostat.com for help.
5
If your old thermostat had both V and VR wires, check wifithermostat.com for help.
6
Leave metal jumper between R and RC terminals in place.
7
19 69-2718EF—01
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