Honeywell T10 Pro, THX321WFS2001W, THX321WF2003W Installation Manual

T10 Pro Smart

33-00479EFS-05

Thermostat with
RedLINK™

THX32 1WFS 20 01W

(Sensor included)

THX321WF2003W

(No sensor)

Programmable Thermostat

Professional Install Guide

Read before installing

Package Includes:

• T10 Pro Smart Thermostat

• UWP™ Mounting System

• Standard Installation Adapter (J-box
adapter)

• Decorative Cover Plate

• Screws and Anchors

• Thermostat literature

TH321WF2003W depic ted.

Search for local rebates.
Honeywell Home thermostats
work with utility programs to
reward you for helping save
energy.
HoneywellHome.com/Rebates

Compatibility

• Compatible with most heating, cooling, and heat pump systems

• Required: 24 VAC power (“C” wire)

• Does not work with electric baseboard heat (120240V)

• Does not work with millivolt systems

• Android or iOS smartphone or tablet

Customer assistance

WEB honeywellhome.com

PHONE 18006333991

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M37809

UWP Mounting System installation

1. Open package to find the UWP. See
Figure 1.

2. Position the UWP on the wall. Level and
mark hole positions. See Figure 2.

Drill holes at marked positions, and then
lightly tap supplied wall anchors into wall
using a hammer.

‒ If your box contains red anchors, use

a 7/32” drill bit. If your box contains
yellow anchors, use a 3/16” drill bit.

3. Pull the door open and insert wires
through wiring hole of the UWP. See
Figure 3.

4. Place the UWP over the wall anchors.
Insert and tighten mounting screws
supplied with the UWP. Do not
overtighten. Tighten until the UWP no
longer moves. Close the door. See Figure

4.

Optional Cover Plate installation

Use the Optional Cover Plate when:

• Mounting the thermostat to an
electrical junction box

• Or when you need to cover paint gap
from the old thermostat.

5. Separate the Junction Box Adapter
from the Cover Plate. See Figure 5.

6. Mount the Junction Box Adapter to
the wall or an electrical box using any
of the eight screw holes. Insert and
tighten mounting screws supplied with
Cover Plate Kit. Do not overtighten.
Make sure the Adapter Plate is level.
See Figure 6.

7. Attach the UWP by hanging it on the
top hook of the Junction Box Adapter
and then snapping the bottom of the
UWP in place. See Figure 7.

8. Snap the Cover Plate onto the
Junction Box Adapter. See Figure 8.

supplied

#6 5/8”

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3

Use 2x

screws

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4

Use 3x supplied

screws (#8 11/2
for red anchors and
#6 11/2 for yellow

anchors)

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Wiring UWP

Push down on the tabs to put the wires into the inner holes of their corresponding
termi nals on the UWP (one wire per terminal) until they are firmly in place. Gently
tug on the wires to verify they are secure. If you need to release the wires again,
push down the terminal tabs on the sides of the UWP.

This wiring is just an example,

yours may vary.

Terminal designations

Conventional Systems Heat pump systems

Terminal Description Terminal Description

S/S

Y Compressor Stage 1 Y Compressor Stage 1

Y2 Compressor Stage 2 Y2 Compressor Stage 2

G Fan Relay G Fan Relay

C

K*

U/U**

A L/A

W Heat Stage 1 O/B

W2 Heat Stage 2 Aux Backup Heat

R 24 VAC Heating transformer R 24 VAC Heating transformer

Rc 24 VAC Cooling transformer Rc 24 VAC Cooling transformer

* The THP9045A1098 C-wire adaptor is used on heat /cool systems when you only have four wires at

the thermostat and you need a fifth wire for a common wire. Use the K terminal in place of the Y and
G terminals on conventional or heat pump systems to provide control of the fan and the compressor
through a single wire—the unused wire then becomes your common wire. See THP90 45 instructions
for more information.

** See note on Wiring U terminals on the following page.

Input for a wired indoor,
outdoor sensor

24VAC Common wire from
secondary side of cooling
transformer (if 2 transformers)

Connect to K on C-wire
adaptor

Relay for humidifier,
dehumidifier, or ventilator

S/S

C

K*

U/U**

E Emergency Heat

Input for a wired indoor,
outdoor sensor

24VAC Common wire from
secondary side of cooling
transformer

Connect to K on C-wire
adaptor

Relay for humidifier,
dehumidifier, or ventilator

Connect to compressor
monitor

Changeover valve for heat
pumps

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Setting Slider Tabs

Set R Slider Tab, see Figure 9.

• Use built-in jumper (R Slider Tab)

to differentiate between one or two
transformer systems.

• If there is only one R wire, and it is

connected to the R, Rc, or RH terminal
on the old thermostat, set the slider to
the up position (1 wire).

• If there is one wire connected to the R

terminal and one wire connected to the
Rc terminal, set the slider to the down

position (2 wires).

Set U Slider Tab, see Figure 10.

• Use built-in jumper (U Slider Tab) for
IAQ device.

• When the U Slider Tab is in the down
position (2 wires) the U contacts are a
dry set of contacts.

• If your IAQ device is powered by the
cooling transformer, move the U Slider
Tab to the up position (1 wire). When
this is done, the lower U terminal is
internally jumped to the Rc terminal.
In this application, you would hook
up one wire from your IAQ device to
the upper U terminal and the other
to the common side of the cooling
transformer. The 1 wire setting is most
commonly used when using a fresh
air damper for ventilation or using low
speed fan for dehumidification.

• See wiring examples on the next page.

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10

4

or air-handler

transformer

24 volt transformer

* Label for this terminal
varies by equipment

Whole house humidifier, dehumidifier, or ventilator

Using U Slider Tab

Wired to humidifier,
dehumidifier or ventilator
with built-in transformer.

11 12

Humidifier,
dehumidifier,
or ventilator

Wired to humidifier, ventilator,
or damper powered by external
transformer

13 14

Wired to fresh air damper
powered by furnace
transformer.

Damper

C from furnace

Wired to low speed fan
terminal on HVAC for
dehumidification

R from 24 volt

Humidifier,
dehumidifier,
or ventilator

C (common) from

Dehumidifier*

Furnace or
air-handler

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Wiring

NOTES:

1. Use 18 to 22 gauge thermostat wire. Shielded cable is not required.

2. Set the R Slider Tab on the UWP to the up position (1 wire) for 1 transformer
systems or the down position (2 wires) for 2 transformer systems. See "Setting
Slider Tabs" on page 4.

3. Set the U Slider Tab as shown in the diagrams on page 4.

Conventional systems

1H/1C System (1 transformer)

R Power
Rc [R+Rc joined by Slider Tab]
Y Compressor contactor
C* 24VAC common
W Heat relay
G Fan relay

Heat-only System with Fan

R Power
Rc [R+Rc joined by Slider Tab]
C* 24VAC common
W Heat relay
G Fan relay

1H/1C System (2 transformers)

R Power (heating transformer)
Rc Power (cooling transformer)
Y Compressor contactor
C* 24 VAC common from cooling transformer
W Heat relay
G Fan relay

2H/2C System (1 transformer)

R Power
Rc [R+Rc joined by Slider Tab]
Y Compressor contactor (stage 1)
C* 24VAC common
W Heat relay (stage 1)
G Fan relay
W2 Heat relay (stage 2)
Y2 Compressor contactor (stage 2)

* This thermostat requires a C-Wire. If a C-Wire is not available and the system uses Y and G, use C-Wire

adapter accessory THP9045A1098.

Cool-only System with Fan

R Power
Rc [R+Rc joined by Slider Tab]
Y Compressor contactor
C* 24VAC common
G Fan relay

Hot Water Relay Panel

R Power
Rc [R+Rc joined by Slider Tab]
W Heat Relay
C* 24VAC common

NOTE: If the panel does not provide 24 volts AC
at R and C, set the slider to down position and
wire a separate transformer to Rc and C.

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Conventional systems

Power open Zone valve

R Power from transformer
Rc [R+Rc joined by Slider Tab]
W Valve
C* 24VAC common

NOTE: If the valve uses Y for power close, the thermostat needs to be configured for a radiant heat system
without cooling.

Series 20 Zone valve

(power open and power closed)

R Power from transformer
Rc [R+Rc joined by Slider Tab]
W Power open valve (usually B)
Y Power close valve (usually W)
C* 24VAC common

Heat pumps systems

1H/1C Heat Pump System

R Power
Rc [R+Rc joined by Slider Tab]
Y Compressor contactor
C* 24VAC common
O/B Changeover valve
G Fan relay

2H/2C Heat Pump System

R Power
Rc [R+Rc joined by Slider Tab]
Y Compressor contactor (stage 1)
C* 24VAC common
O/B Changeover valve
G Fan relay
Y2 Compressor contactor (stage 2)
L Heat pump fault input

2H/1C Heat Pump System

R Power
Rc [R+Rc joined by Slider Tab]
Y Compressor contactor
C* 24VAC common
O/B Changeover valve
G Fan relay
Aux Auxiliary heat**
E Emergency heat relay**
L Heat pump fault input

NOTE: Do NOT use W for heat pump applications. Auxiliary heat must wire to AUX or E.

* This thermostat requires a C-Wire. If a C-Wire is not available and the system uses Y and G, use C-Wire

adapter accessory THP9045A1098.

** If you do not have separate wires for the Aux and E terminals, connect the wire to the Aux terminal.

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3H/2C Heat Pump System

R Power
Rc [R+Rc joined by Slider Tab]
Y Compressor contactor (stage 1)
C* 24VAC common
O/B Changeover valve
G Fan relay
Aux Auxiliary heat**
E Emergency heat relay**
Y2 Compressor contactor (stage 2)
L Heat pump fault input

Mounting thermostat

1. Push excess wire back into the wall opening.

2. Close the UWP door. It should remain
closed without bulging.

3. Align the UWP with the thermostat, and
push gently until the thermostat snaps in
place.

Note: If you used the Optional Cover Plate
shown on page 2, remove the gray trim
ring from the thermostat before step 3. Then
align the thermostat with cover plate and push
gently until the thermostat snaps into place.

Note: If needed, gently pull to remove the
thermostat from the UWP

Installer setup

The display will walk you through equipment setup,
connecting to wireless sensors and connecting to
WiFi.

The final step in the setup is a place you can enter
your company name and contact information as
well as your Contractor PRO™ number.

That contact information will be displayed with
alert or reminder messages to keep you connected
to your customer.

Enter your company’s Contractor PRO™ account
number to participate in periodic promotions. Earn
incentives such as bonus points for every T10
Pro Smart thermostat you install during eligible
promotional periods. Your account number is
an 8-digit number that includes a leading zero
(example 01234567).

For questions on this bonus or membership to the
Contractor PRO™ loyalty program, contact us at
18009194835 or [e-mail].

Welcome!

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Sensor installation

(Optional C7189R20022 wireless sensor
2-pack sold separate. Up to 20 sensors max per
thermostat)

1. Remove white cover from grey base and
Insert (2) AAA Alkaline batteries in the
sensor.

2. Open the menu.

3. Tap "Devices & Sensors."

4. Tap "Add."

5. Follow the on-screen instructions.

6. Snap the sensor onto the wall-plate.

7. Adhere the included command strip to the
wall-plate. Then adhere the sensor to the
wall. Level sensor for appearance. (See the
sensor instructions for proper placement.)

WALL

ADHESIVE

STRIP

Devices

& Sensors

WALLPLATE

Add

SENSOR

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Apple® HomeKit™ Setup

1. Touch Menu icon at the bottom of the T10 home screen.

2. Scroll down and select “Connect HomeKit”.

3. Use the Apple Home App and select “Add Accessory”. Scan the code shown on
your thermostat with your phone.

4. Follow the instructions on your phone.

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How to use your thermostat

The screen will wake up by pressing the center area of the displayed temperature.

Current Priority

Displays the type of
priority and number of
rooms being prioritized.

Indoor Temperature

Displays the current
indoor temperature.

Adjust Temperature

Touch the up and down
arrows to set your desired
temperature.

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18%

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Menu

Contains features such as mode,
fan, schedule, priority, and other
thermostat settings.

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Indoor Humidity

Displays the current
indoor humidity.

Desired Temperature

Displays the desired
temperature.

How to use Priority

Priority creates an average temperature in your home based on specific rooms. This
allows you to prioritize comfort where you want it.

Selected Rooms

Rooms you manually select create an average
temperature in your home.

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72 72

Active Rooms

Rooms with detected motion are automatically selected
to create an average temperature in your home.

Room without Activity

No motion is detected. Will not contribute to the average
temperature.

Room with Activity

Motion is detected. Will contribute to the average
temperature.

Unselected Room

Will not contribute to the average temperature.

Selected Room

Will contribute to the average temperature.

72 72

72 72

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How to find more options

1. Touch the menu button.

2. Scroll up and down for more options.

Menu options include

Installer Setup

• System type

• IAQ control (hum, dehum, vent) reminders

Installer Test

• Turn on heat, cool, or IAQ equipment

Devices & Sensors

• View, add, or remove RedLINK indoor sensors

• Identity wireless sensors

• Add wireless sensors Device Information

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Installer Options

Thermostat Information

• MAC ID number

• IP address

• Date code

• Model number

• Build date

• Stat app

• Firmware version

• Stat app boot #

• Hardware

Dealer Information

Finding date code (pass code) for installer setup.

Open the Menu icon, and choose Thermostat Information. Write down date code.

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Alerts and notifications

1. The red dot above the Menu
icon indicates an active alert or
notification. Touch the Menu
icon to view active Alerts &
Notifications.

2. Touch Notifications to open this
menu.

3. Touch the alert message to see
more information about the alert.

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Notifications

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Notifications

Set the Date

and Time

Set the Date

and Time

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Troubleshooting

Screen is blank

Screen is difficult to

read

Heating or cooling

system does not

respond

Temperature

settings do not

change

“Cool On” or “Heat

On” is flashing

• Check circuit breaker and reset if necessary.

• Make sure power switch at heating and cooling system is on.

• Make sure furnace door is closed securely.

• Check setting in MENU/ Preferences / Inactive backlight

brightness or Inactive sleep backlight brightness

• Touch MENU to go to system mode. Set to heat. Make sure

the heat setpoint is above the room temperature.

• Touch MENU to go to system mode. Set to cool. Make sure

the cool setpoint is below the room temperature.

• Check circuit breaker and reset if necessary.

• Make sure power switch at heating & cooling system is on.

• Make sure furnace door is closed securely.

Make sure heating and cooling temperatures are set to
acceptable ranges:

• Heat: 40 °F to 90 °F (4.5 °C to 32.0 °C)

• Cool: 50 °F to 99 °F (10.0 °C to 37.0 °C)

• Compressor protection feature is engaged. Wait 5 minutes
for the system to restart safely, without damage to the
compressor.

Aux heat runs in

cooling

Cool runs with a call

for heat

Heat runs with cooling

Sensor will not

connect

• For heat pump systems, verify there is not a wire attached to W
on UWP systems. See “Heat pumps systems" on page 7.

• For heat pump systems, verify there is not a wire attached to W
on UWP systems. See “Heat pumps systems" on page 7.

• Verify there is not a wire attached to W for heat pump
systems. See "Wiring" on pages 67.

• Press and hold Connect on the wireless sensor for
15 seconds. The LED will turn Amber. Return to the
thermostat menu and press Menu > Devices and Sensors.
Follow the on-screen instructions to add the sensor.

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Specifications

Temperature Ranges

Heat: 40 °F to 90 °F (4.5 °C to 32.0 °C)
Cool: 50 °F to 99 °F (10.0 °C to 37.0 °C)

Operating Ambient Temperature

32 °F to 120 °F (0 °C to 48.9 °C)

Shipping Temperature

20 °F to 120 °F (28.9 °C to 48.9 °C)

Operating Relative Humidity

5% to 90% (non-condensing)

Humidity setting range

10% to 60% RH.

Dehumidity setting range

25% to 80% RH.

Electrical Ratings

Terminal Voltage

W Heating 2030 Vac 0.021.0 A

(Powerpile) 750 mV DC 100 mA DC

W2 (Aux) Heating 2030 Vac 0.021.0 A
E Emergency Heat 2030 Vac 0.020.5 A
Y Compressor Stage 1 2030 Vac 0.021.0 A
Y2 Compressor Stage 2 2030 Vac 0.021.0 A
G Fan 2030 Vac 0.020.5 A
O/B Changeover 2030 Vac 0.020.5 A
L/A Input 2030 Vac 0.020.5 A
U 2030 Vac 0.020.5 A

Power Consumption

3 VA

(50/60Hz)

Running
Current

Physic al Dimensions in inche s (mm) (H x W x D)

T10 PRO Smart Thermostat:

4.9" x 3.7" x 0.93" (125.4 x 94.1 x 23.68)
UWP Mounting System (included):

29/32" x 213/64" x 243/64" (58 x 56 x 10)
Cover Plate – (THX321WFS2001W):

511/64" x 51/2" x 11/16" (131 x 140 x 17.5)
Cover Plate – (THX321WF2003W):

67/64" x 67/64" x 9/32" (155 x 155 x 7)
C7189R2002 wireless indoor sensor- ordered separate

2.6” X 2.6” X .77” (66.25 x 66.25 x 19.7)

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