Honeywell T9 User manual

T9 THERMOSTAT
Installation Guide
Online Guides
honeywellhome.com

2
Read before installing.
Included in your box:
Tools you will need: You may need:
Installation Guide Screws and
anchors
Phillips screwdriver Wire Stripper
Home WiFi Password
Wireless
room sensor
T9 WiFi
Thermostat
Small flat head screwdriver
Needle-nose pliers
CWire
Adapter
(optional)
UWP
Wallplate
Pencil
Drill and drill bit (7/32in)
Wire labels
Level
Flashlight

3
Compatibility Section
For help, see:
ONLINE GUIDES AND SUPPORT VIDEOS AT: honeywellhome.com/support
SOCIAL Twitter: @Honeywell_Home, Facebook: Honeywell Home
Or contact:
EMAIL [e-mail]
PHONE [phone]
Electrical Specifications
INPUT: 24V~@60Hz, 0.2A
• REQUIRED: A CWire (common wire) is needed for 24 VAC power. If you do not
have a CWire, then a CWire Adapter is provided.
This guide will help you determine if you have a CWire or will need to use the
included CWire Adapter (Step 10). The CWire is a wire that originates from your
heating and cooling system and needs to be connected to the C terminal on your
thermostat. There is no universal color used to designate this type of wire.
CAUTION: ELECTRICAL HAZARD
Can cause electrical shock or equipment damage. Disconnect power before beginning installation.
CAUTION: EQUIPMENT DAMAGE HAZARD
Compressor protection is bypassed during testing. To prevent equipment damage, avoid cycling the
compressor quickly.
CAUTION: MERCURY NOTICE
If this product is replacing a control that contains mercury in a sealed tube, do not place the old control
in the trash. Contact your local waste management authority for instructions regarding recycling and
proper disposal.
• Compatible with most heating, cooling, and heat pump systems
• Does not work with electric baseboard heat (120240V)
• Does not work with millivolt systems
• Does not support S terminals for indoor and outdoor sensors
• Android or iOS smartphone, tablet, or device
C
CU GY
GY
A
OR
CWire CWire Adapter

4
Removing your old thermostat
You will need: Screwdriver, needle-nose pliers
OFF
ON
75
1
2
3
Turn off power
To protect your equipment, turn off
the power at the breaker box or switch
that controls you heating and cooling
equipment.
Note: The thermostat off switch
will not turn off the power to the
equipment.
Check that your system is off
Change the temperature on your old
thermostat so that your system starts
heating or cooling.
If you don’t hear or feel the system turn
on within 5 minutes, the power is off.
Note: If you have a digital thermostat that
has a blank display, skip this step.
Remove your existing thermostat from
the wall plate
On most thermostats, you can take off
the thermostat by grasping and gently
pulling. Some thermostats may have
screws, buttons, or clasps.
Do not remove any wires from your
thermostat at this time!
OR
OFF
Breaker box
Switch

5
5
6
7
4
Take a picture of your existing wall
plate’s wiring
In order to capture all of the letters next
to the terminals, be sure to take multiple
pictures from different angles.
You may need to reference this image
later.
Remove any jumpers
A jumper is used to connect two
terminals. It may look like a small
staple or a colored wire.
Do not discard.
Keep jumpers with your old wallplate.
Label the wires
Use the stickers provided with your new
thermostat to label each wire on your
existing wall plate.
Do not label jumpers. Your new
thermostat does not need jumpers.
Do you have a line voltage system?
Line voltage systems have thick black
wires with wire nuts or are labeled high
voltage (120V or higher).
Your system is not compatible. Call
18557335465 to find a pro-
installer in your area.
Continue to the next step.
Wire nut
Thick black wire
Example
of a jumper
Terminals
Compatibility Check
YES
NO
YRRC

6
10 Do you have a CWire?
Look at the thermostat wiring
checklist from Step 8, or the photo
you took. Is the CTerminal checked?
This means you will not need
to install the included CWire
Adapter. Skip to Installing Your
New Thermostat (page 9).
This means you don’t have
a C-wire connected to your
thermostat. Continue to next
step.
Compatibility Check
YES
NO
9
8
Disconnect the wires and remove
the old wall plate
You may need a screwdriver to
release wires from terminals.
Tip: Wrap the wires around a pencil
to prevent them from falling in the
wall.
Write down the colors of the wires
Check the boxes and write down the color of the wires connected to terminals
that are coming from the wall. Check all that apply (not all will apply).
Terminal Wire Color Terminal Wire Color
¨A or L/A ¨R
¨CRequired* ¨Rc
¨E¨Rh
¨G¨W
¨K¨W2 or Aux
¨O/B ¨Y
¨U (1 or 2) ¨Y2
*A C-wire or CWire Power Adapter (included) is required.
If there are wires in terminals that are not listed, you will need additional
wiring support. Visit honeywellhome.com/support to find out more.
C
CU GY
GY
A

7
11
12
13
Do you have a zoning panel?
You have a zoning panel if you
have multiple thermostats and one
furnace or heating system.
CWire Adapter installation is
more complicated on zoned
systems. Call 18557335465
to find a pro-installer.
Proceed to the next step.
Do you have an unused wire?
Look at the bundle of wires coming from the
wall.
Note: You may have to pull the bundle of wires
out from the wall to find the unused wire.
Continue to Step 13.
Open the included CWire Adapter box and
follow the instruction guide.
Label unused wire
Label your unused wire with the
provided “C” sticker label. You may need
to use a wire stripper to expose at least
1/4 inch of the wire.
Note: If you have multiple unused wires,
then label only one wire and make note
of the color here:
Compatibility Check
YES
YES
NO
NO
Only complete this section if you answered No to Step 10
Connecting Your Unused CWire
You will need: Screwdriver, flashlight, wire strippers
Thermostat
Furnace
Example of unused C-wire
Zoning
Panel
-
Go to your furnace or heating system
This system is often located in your basement, attic or garage.
Bring a flashlight and screwdriver.

8
14
16
15
17
Remove cover from furnace or heating
system
Open the heating and cooling system’s
cover to find the control board. You
should see the same terminal labels that
are on your thermostat.
Note: You may need to unscrew the cover.
The control board may be at the top or
bottom.
Connect the unused wire to the
C-terminal
Note: If there are existing wires in the
C-terminal, make sure they are still
connected to the C-terminal after
connecting this wire.
Find the other end of the unused wire
Locate the bundle of wires that are the
same as the ones at your thermostat.
The unused wire should be the same
color as the one near your existing
thermostat. See Step 13 for the color you
wrote down.
Close the cover to the furnace or
heating system
Be sure the cover is completely closed.
Some systems will not power up if the
cover isn’t fully closed.
You’ve connected the C-wire.
You will NOT need to use the included
CWire Adapter.
G
C
R
W
Y
G
C
R
W
Y
G
C
R
W
Y
-
Go back to the wall where you are installing your thermostat and continue
to “Installing Your New Thermostat” on the next page.

9
Installing Your New Thermostat
You will need: Level, pencil, drill and a 7/32in drill bit
Thermostat Screws UWP
wallplate
WallAnchors

10
18
19
Position wall plate
Pull open the wall plate that was included
with your new thermostat. Insert the
bundle of wires through the back of the
wall plate.
Make sure at least 1/4-inch of each wire
is exposed for easy insertion into the wire
terminals.
Insert recommended wall anchors
It is recommended that you use the
wall anchors included in the box to
mount your thermostat.
You can use the wall plate to mark
where you want to place the wall
anchors.
a) Level the wall plate
b) Mark the location of the wall
anchors using a pencil
c) Remove the wall plate
d) Drill the holes using a 7/32” drill
bit
e) Insert the wall anchors
f) Make sure the anchors are flush
with the wall
g) Reposition the wall plate on wall
-
UWP
Anchors Wall