Honeywell Round User Manual

Round™ Smart Thermostat

Professional Install Guide

System Types

Compatible with 24-volt systems such as
forced air, hydronic, heat pump (including
dual fuel), oil, gas and electric.

Does not work with electric baseboard heat
(120/240V).

72

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
the Thermostat Recycling Corporation at
18002388192 or thermostat-recycle.
org for information on how and where
to properly and safely dispose an old
thermostat.

Disconnect power before installation.

Can cause electrical shock or equipment
damage.

Must be installed by a trained, experienced technician

Read these instructions carefully. Failure to follow these instructions can
damage the product or cause a hazardous condition.

AAA

Included in your box:

AAA

Thermostat Wall plate

Optional wall cover

AAA

Screws

Anchors

Also included:

“Getting Started” homeowner guide

3

Installation

1 Insert the recommended wall anchors

It is recommended that you use the provided anchors when
mounting your thermostat.
Recommended drill bit size is 7/32 – 1/4-inch.

Optional: Attach the optional wall cover to the wall
plate

If you choose to use the optional wall cover to hide
blemishes, snap the wall plate to the optional wall cover
before continuing.

2 Bundle and insert wires through the clear

rubber holder
Guide the wires through the clear rubber holder on
the back of the wall plate.

Do not remove the clear rubber wire holder.

4

3 Set Jumper Switches

R Jumper Switch:

For single transformer
systems, move switch up.

For dual transformer
systems, move switch
down.

Set the R Jumper Switch Insert Wire(s) into Terminal(s)

R (only)

R

C (only)

H (only)

R

R

C

R

RC

R

H

R
R & RC

R
R & RC

R wire

Rc wire

RH wire

R wire

Rc wire

RH wire

Rc wire

R

Rc

R

Rc

R

Rc

R

Rc

R

Rc

Jumper Switch for humidifier, dehumidifier, or ventilation:

For single wire products,
set the switch to 1 Wire.

5

For two wire products,
set the switch to 2 Wire.

4 Connect all wires

Push each wire into its corresponding
terminal until it is firmly in place. Gently
tug on wires to verify they are secure. If
you misplace a wire, use a ballpoint pen to
push down on the terminals and release
the wire.

Refer to page 8 for wiring options,
configurations, and notes.

Note: The illustration to the right
shows the most common wiring
configuration.

5 Mount the wall plate using

the provided screws

AAA

AAA

6

6 Firmly snap the thermostat into place

The thermostat will glow and display the
screen for up to three minutes while it
starts up.

7

Wiring

Terminal Designations

L Heat pump system monitor K Optional C-wire adaptor
C Common wire from secondary side of

cooling transformer, if 2 transformers

W2

2nd stage heat relay (heat pump

(AUX)

auxiliary, emergency heat)

W

1st stage heat relay (changeover valve

(O/B)

for heat pumps)

U1 Terminal for indoor air quality products

(humidifier, dehumidifier, ventilator)

U2 Terminal for indoor air quality products

(humidifier, dehumidifier, ventilator)

Wiring Configurations

Two stage furnace and air-conditioning

G Fan relay

Y2 2nd stage compressor contactor

Y 1st stage compressor contactor

R Heating power. Connect to

secondary side of heating system
transformer

Rc Cooling power. Connect to

secondary side of cooling
system transformer

C Common wire (optional)
W2 Heat relay (stage 2)
W Heat relay
G Fan relay
Y2 Compressor contactor (stage 2)
Y Compressor contactor (stage 1)
R Power

8

Notes

• Thermostat C wire
is optional for this
application. C wire
required if Homekit
is used.

• Set the R Jumper
Switch on the wall
plate to R

Separate heating and cooling transformers

C Common wire (optional)
W Heat relay
G Fan relay
Y Compressor contactor (stage 1)
R Power
Rc Power

Notes

• Thermostat C wire
is optional for this
application. C wire
required if Homekit
is used.

• Set the R Jumper
Switch on the wall
plate to R & Rc

Single stage heat pump with auxiliary heat (electric or dual fuel)

C Common wire (optional)
AUX Auxiliary/Emergency heat
O/B Reversing valve
G Fan relay
Y Compressor contactor (stage 1)
R Power

Notes

• Thermostat C wire
is optional for this
application. C wire
required if Homekit
is used.

• Set the R Jumper
Switch on the wall
plate to R

Two stage heat pump with auxiliary heat (electric or dual fuel)

C Common wire (optional)
AUX Auxiliary/Emergency heat
O/B Reversing valve
Y2 Compressor contactor (stage 2)
G Fan relay
Y Compressor contactor (stage 1)
R Power

Notes

• Thermostat C wire
is optional for this
application. C wire
required if Homekit
is used.

• Set the R Jumper
Switch on the wall
plate to R

9

Power open hot water zone valve

C Common wire (optional)
W Heat relay
R Power

Notes

• Thermostat C wire
is optional for this
application. C wire required
if Homekit is used.

• Set the R Jumper Switch
on the wall plate to R

Two wire powered humidifier, dehumidifier, ventilator

U1 IAQ relay
U2 IAQ relay

Notes

• Set the Jumper
Switch on the wall plate to

2 Wire

Single wire non-powered humidifier, dehumidifier, ventilator, or
dehumidification with low speed fan

U1 IAQ relay Notes

• Set the Jumper Switch on
the wall plate to 1 Wire

10

Setup

Use one of the following options to setup the thermostat:

Honeywell Home app On-screen menus

Download and login
to complete the setup.

Use instructions on the
following pages to complete the
setup.

Setup: On-screen menus

_ _ _ _

1 Press and hold (Weather button)

for 5 seconds to access the Main
Menu.

3 Using s, highlight

Set Up and press OK.

2 Using t, highlight Device

Details and press OK. Using t,

find the 4-digit password (date
code) and record it above. Press
OK to exit.

4 Using t, highlight Contractor

and press OK.

12

5 Enter the password by pressing

or t to select the first digit and
press OK. Continue for all four
digits.

6 Highlight Set Up and

press OK.

7 Press s or t to highlight the setting and

press OK. Continue until all settings have
been configured. For a full list of setup

options, see “Setup options” on page

14.
Note: To exit setup early, press t to

highlight EXIT

and press OK.

13

8 When all settings are configured,

save changes.
To save and confirm, highlight
Yes and press OK. To exit without
saving, press t to highlight No
and press OK.

Setup options

1 From the Contractor Menu, highlight Set Up and press OK.
2 Press s or t to highlight the setting and press OK. Continue until all settings have

been configured.

3 When all settings are configured, you will be prompted to save changes. Highlight

Yes and press OK to save and exit. To exit setup early by pressing
t to highlight EXIT and press OK.

ISU # Description Setting

1160 Temperature

indication scale

2120 Heating system type 1 = Conventional forced air heat

2140 Heating equipment

type

0 = Fahrenheit
1 = Celsius

2 = Heat pump
3 = Radiant heat
5 = None (cool only)

Conventional Forced Air Heat:

1 = Standard efficiency gas forced air
2 = High efficiency gas forced air
3 = Oil forced air
4 = Electric forced air
5 = Hot water fan coil

Heat Pump:

7 = Air to air heat pump
8 = Geothermal heat pump

Radiant Heat:

9 = Hot water radiant heat
12 = Steam

14

ISU # Description Setting

2160 Reversing valve O/B 0 = O (O/B on cool)

2180 Cool stages /

compressor stages

2200 Heat stages /

backup heat stages

2220 Fan operation in heat 0 = No fan

2240 Backup heat type 31 = Electric forced air

2260 External Fossil Fuel

Kit

3120 Staging control

- backup heat
differential

3140 Backup heat upstage

timer

Compressor lockout /

3160

balance point

3180 Backup heat lockout Off

1 = B (O/B on heat)

0, 1, 2

Heat stages: 0, 1, 2
Backup heat stages: 0, 1

1 = Equipment controls fan
2 = Thermostat controls fan

32 = Gas/Oil Forced air (or Fossil forced air)

0 = Thermostat controls backup heat
1 = External Fossil Fuel Kit controls backup heat

Comfort

2.0°F to 15.0°F from setpoint (in 0.5°F increments)

1.0°C to 7.5°C from setpoint (in 0.25°C increments)

Off
30, 45, 60, 75, 90 minutes
2, 3, 4, 5, 6, 8, 10, 12, 14, 16 hours

Off
5°F to 60°F (in 5°F increments)
15.0°C to 15.5°C (in 2.5°C or 3.0°C increments)

5°F to 65°F (in 5°F increments)
15.0°C to 18.5°C (in 2.5°C or 3.0°C increments)

15

ISU # Description Setting

3200 Cool cycles per hour 1 - 6

3220 Cool cycles per hour

- stage 2

3240 Heat cycles per hour 1 - 12

3260 Heat cycles per hour

- stage 2

3280 Backup heat cycles

per hour

4120 Adaptive intelligent

recovery

4160 Minimum setpoint

(Note: Setting applies
to both heat and cool
setpoints)

4220 Maximum setpoint

(Note: Setting applies
to both heat and cool
setpoints)

8100 Humidifier type 0 = None

8120 Humidification -

window protection

1 - 6

1 - 12

1 - 12

0 = No
1 = Yes

50°F to 99°F

10.0°C to 37.0°C

40°F to 90°F

4.5°C to 32.0°C

1 = Steam
2 = Bypass or fan powered

0 = Off
1 = On

16

ISU # Description Setting

8140 Humidification

control

9100 Dehumidification

equipment

9140 Dehumidification

equipment setup

9160 Dehumidification -

overcooling limit

9180 Dehumidifier fan

control

10100 Ventilation type 0 = None

10160 Ventilation fan

control

10240 Ventilation percent

on time

10280 Ventilation low

temperature lockout

0 = Humidify only when heat is On
1 = Humidify only when fan is On
2 = Humidify on demand: Thermostat controls fan
3 = Humidify on demand: Humidifier controls fan

0 = None
1 = A/C with low speed fan
2 = A/C with high speed fan
4 = Whole house dehumidifier

0 = Normally open
1 = Normally closed

0, 1, 2, 3°F

0.0, 0.5, 1.0, 1.5°C

0 = Thermostat controls fan
1 = Equipment controls fan

1 = ERV / HRV
2 = Passive (fan only)
3 = Fresh air damper

0 = Thermostat controls fan
1 = Equipment controls fan

10% to 100% (in 10% increments)

Off
20°F to 40°F (in 5°F increments)
29.0°C to 4.5°C (in 2.5°C or 3.0°C increments)

17

ISU # Description Setting

10300 Ventilation high

temperature lockout

10320 Ventilation high dew

point lockout

11100 Home heat setpoint 40°F to 90°F

11120 Home cool setpoint 50°F to 99°F

11140 Setpoint for away

mode

11160 Away heat setpoint 40°F to 90°F

11180 Away cool setpoint 50°F to 99°F

14020 Temperature display

offset

14025 Humidity % offset 12% RH to 12% RH

Off
80°F to 110°F (in 5°F increments)

26.5°C to 43.5°C (in 2.5°C or 3.0°C increments)

Off
65°F to 85°F (in 5°F increments)

18.5°C to 29.5°C (in 2.5°C or 3.0°C increments)

4.5°C to 32.0°C (in 0.5°C increments)

10.0°C to 37.0°C (in 0.5°C increments)

0 = Away setpoints
1 = Smart temperature setpoints

4.5°C to 32.0°C (in 0.5°C increments)

10.0°C to 37.0°F (in 0.5°C increments)

3°F to 3°F

18

Advanced Setup

Change Language

To change the language to either English, French, or Spanish:

From the Main Menu, press t to highlight Language and press OK.

1

Press t to highlight the desired language and press OK.

2

To save and confirm the changes, highlight Yes and press OK. To exit without

3

saving, press t to highlight No and press OK.

View Device Details

To view device details, such as model, version, WiFi version, and date code:

From the Main Menu, press t to highlight Device Details and press OK.

1

Press OK to exit back to the main menu.

2

Perform a System Test

To perform a system test:

From the Contractor Menu, press t to highlight the System Test and press OK.

1

Press t to highlight the category and press OK.

2

Press t to highlight the test and press OK.

3

Once the test is complete, press OK to return to the Contractor Menu.

4

View Power Supply Details

To view power supply details, such as battery status and eternal power details:

From the Contractor Menu, press t to highlight Power Supply and press OK.

1

Press OK to exit.

2

19

Frequently Asked Questions

Will the thermostat still work if WiFi connection is lost?

Yes, some features are managed only through the Honeywell Home app and will not
function while the connection is down. The temperature can be adjusted directly at the
thermostat. The thermostat will automatically reconnect to WiFi once the network is
restored.

Will the thermostat work with a Static IP Address Network scheme?

No, the router network needs to be set up for Dynamic Host Control Protocol (DHCP) for
the thermostat to dynamically get an IP address. Consult the router’s manual for set up
instructions.

What WiFi security standards are compatible with the thermostat?

• OPEN • WPA2_AES_PSK • WPA_TKIP_PSK

• WEP_PSK • WPA2_MIXED_PSK

The thermostat is not finding the in home WiFi network.

The thermostat operates in the 2.4GHz range. That may be why the thermostat does not
see the network but the smartphone, which operates in both the 2.4 and 5.0 GHz range,
sees the network. Most routers will broadcast two networks, one SSID on the 5.0 GHz
radio and one SSID on the 2.4 GHz radio.

Can the thermostat be used in a home that does not have WiFi?

The thermostat can work as a basic thermostat without WiFi. The key features, including
location based temperature control, require a WiFi connection.

Is WiFi needed to control ventilation, humidity or dehumidification?

Yes, these features are managed through the Honeywell Home app.

20

Troubleshooting

Installation is complete but the screen has circles lighting up around it. What
should be done?

When power is first restored to the thermostat, it takes up to three minutes to start up.
The display will light up in circles as it advances through its initial power up. Then, it will
display a unique network name, such as Stat 03. When the name is displayed, touch “OK”
to begin thermostat configuration.

Why does the screen on the thermostat go blank?

When someone is not near the thermostat, the display goes to sleep to conserve energy.
The thermostat can still be controlled through the Honeywell Home app. A motion
detector on the thermostat senses when someone approaches and wakes it up.

A change was made on the Honeywell Home app but it has not shown up on the
thermostat.

There may be a short delay after making temperature and setting changes in
the app.

There is a message that says Thermostat Power Lost. What does that mean?

This is an indication that power to the thermostat has been interrupted. Confirm that the
heating and cooling system is still powered.

If everything is powered as expected but the thermostat is still offline, please contact the
Technical Support team for assistance at 18006333991.

There is a message that says Internet Connection Lost. What does that mean?

The thermostat is connected to the router, but the router is not connected to
the Internet.

21

Can there be multiple users for geofencing?

Yes, there can be multiple users. Geofencing will trigger based on the last person to leave
and the first person to return. To properly use geofencing with multiple users:

• Each user needs to create their own account.

• Each user should use their login ID and password across his or her devices,
including smartphones and tablets.

• No two users should share the same account.

How are multiple users set up with the thermostat?

Access can be given to any or all of the thermostat locations through the
Honeywell Home app. Start by pressing the three-line menu icon in the upper right-hand
corner of the home screen. Press the gear wheel next to the location name. Select Users
and press + Add User located at the bottom of the screen. Type in the email address of
the person to be invited. If they have an account set up, the location will be automatically
added to their account. If they don’t have an account, they will receive an email invitation
prompting them to download the app and create their own account.

Note: All individuals with access to a thermostat share the same user privileges. Users
added will be able to change the thermostat’s settings, as well as add or delete other
users.

Is there a way to extend the signal strength?

The range or distance of the WiFi signal is determined by the homeowner’s router. Check
the router’s manual for additional information.

22

There is a message that says WiFi Signal Lost. What does that mean?

The WiFi signal to the thermostat has been lost. Wait for the thermostat
to reconnect or select a new network from the connection menu. If the thermostat is
unable to reconnect, you will need to troubleshoot the router to determine the cause.

What happens to the thermostat if the power goes out in the home?

All the settings are stored and managed via the Honeywell Home app. If power to the
thermostat is out, nothing will have to be reset. When power is restored, the thermostat
will start operating automatically according to set preferences.

Why is the thermostat showing up as offline?

If the thermostat displays a no WiFi icon on its screen or shows up as offline on the
Honeywell Home app, it has lost connection to the network. Make sure the router is
powered and broadcasting. The home’s WiFi network may need to be reset by power
cycling the router; consult the router’s instruction manual for directions on power cycling.
When the network has been restored, the thermostat will automatically reconnect.

An activation email hasn’t been received.

An email will be sent from connected[e-mail]. An activation email is
needed to complete the account setup. If an activation email is not received after five
minutes, check the Spam folder of the email account.

If you do not find it in the Spam folder, click on the Resend button and the activation
email will be resent. If you still do not receive your activation email, please contact the
Technical Support team at 18006333991 for help.

23

Specifications

Electrical Ratings:

Terminal

W - O/B (Heating) 18 to 30 VAC 1.00 A
W2 - Aux/E (Heating) 18 to 30 VAC 0.60 A
Y (Cooling) 18 to 30 VAC 1.00 A
Y2 (Cooling) 18 to 30 VAC 0.60 A
K 18 to 30 VAC 1.00 A
G (Fan) 18 to 30 VAC 0.50 A
L (Output) 18 to 30 VAC 1.00 A
U1, U2 18 to 30 VAC 0.40 A

Voltage
(50/60 Hz) Max. Current Rating

Power Consumption:

Full brightness = 3.0 VA

WiFi Communication:

2.4GHz band

Temperature Setting Range:
Heating: 40 to 90 °F (4.5 to 32 °C)
Cooling: 50 to 99 °F (10 to 37 °C)

Humidification Setting Range:

10% to 60% RH

Dehumidification Setting Range:

40% to 80% RH

Humidity Display Range:

0% to 99% RH

24

Basic Operations

Turn to set
desired temperature

Turn on/off

Weather

View 6 and
12 hour
forecasts

Turn on/off

HeatingCooling

Home/Away

Set to Home/Away

25

How to use your Honeywell Home app

Once your thermostat is configured and connected to your
smartphone or tablet, take advantage of the following features:

Thermostat

MY HOME

Access the
menu

72˚

Set desired

72

Select Fan mode
Auto/On/Circulate.

Select System
mode Auto/Heat/
Cool/Off/EM Heat

Interested in more Resideo products? Visit resideo.com to learn about all available products connected by the
Honeywell Home app.

App is regularly enhanced and may change.

FOLLOWING SCHEDULE

SCHEDULEFANMODE

26

temperature

Schedule your home
comfort