Honeywell Home Round Smart Thermostat User manual

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).
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.
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.
Round™ Smart Thermostat
Professional Install Guide
72

3
Also included:
“Getting Started” homeowner guide
AAA
AAA
Thermostat Wall plate
Anchors
Screws
Included in your box:
Optional wall cover
AAA

4
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.

5
3 Set Jumper Switches
R Jumper Switch:
For single transformer
systems, move switch up.
For dual transformer
systems, move switch
down.
For single wire products,
set the switch to 1 Wire.
For two wire products,
set the switch to 2 Wire.
R(only)
RC (only)
RH(only)
R
RC
Set the R Jumper Switch Insert Wire(s) into Terminal(s)
RC
RH
R
Rc
R
Rc
R
Rc
R
Rc
R
Rc
R
R & RC
R
R & RC
R wire
Rc wire
RH wire
R wire
Rc wire
RH wire
Rc wire
Jumper Switch for humidifier, dehumidifier, or ventilation:

6
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

7
6 Firmly snap the thermostat into place
The thermostat will glow and display the
screen for up to three minutes while it
starts up.

8
Wiring
Terminal Designations
LHeat pump system monitor KOptional C-wire adaptor
CCommon wire from secondary side of
cooling transformer, if 2 transformers
GFan relay
W2
(AUX)
2nd stage heat relay (heat pump
auxiliary, emergency heat)
Y2 2nd stage compressor contactor
W
(O/B)
1st stage heat relay (changeover valve
for heat pumps)
Y1st stage compressor contactor
U1 Terminal for indoor air quality products
(humidifier, dehumidifier, ventilator)
RHeating power. Connect to
secondary side of heating system
transformer
U2 Terminal for indoor air quality products
(humidifier, dehumidifier, ventilator)
Rc Cooling power. Connect to
secondary side of cooling
system transformer
Wiring Configurations
Two stage furnace and air-conditioning
CCommon wire (optional)
W2 Heat relay (stage 2)
WHeat relay
GFan relay
Y2 Compressor contactor (stage 2)
YCompressor contactor (stage 1)
RPower
Notes
• Thermostat Cwire
is optional for this
application. Cwire
required if Homekit
is used.
• Set the R Jumper
Switch on the wall
plate to R

9
Separate heating and cooling transformers
CCommon wire (optional)
WHeat relay
GFan relay
YCompressor contactor (stage 1)
RPower
Rc Power
Notes
• Thermostat Cwire
is optional for this
application. Cwire
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)
CCommon wire (optional)
AUX Auxiliary/Emergency heat
O/B Reversing valve
GFan relay
YCompressor contactor (stage 1)
RPower
Notes
• Thermostat Cwire
is optional for this
application. Cwire
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)
CCommon wire (optional)
AUX Auxiliary/Emergency heat
O/B Reversing valve
Y2 Compressor contactor (stage 2)
GFan relay
YCompressor contactor (stage 1)
RPower
Notes
• Thermostat Cwire
is optional for this
application. Cwire
required if Homekit
is used.
• Set the R Jumper
Switch on the wall
plate to R

10
Power open hot water zone valve
CCommon wire (optional)
WHeat relay
RPower
Notes
• Thermostat Cwire
is optional for this
application. Cwire 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

Setup
Use one of the following options to setup the thermostat:
Honeywell Home app On-screen menus
Use instructions on the
following pages to complete the
setup.
Download and login
to complete the setup.

12
1 Press and hold (Weather button)
for 5 seconds to access the Main
Menu.
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.
3 Using s, highlight
Set Up and press OK.
4 Using t, highlight Contractor
and press OK.
Setup: On-screen menus
_ _ _ _

13
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 sor tto 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 tto
highlight EXIT and press OK.
8 When all settings are configured,
save changes.
To save and confirm, highlight
Yes and press OK. To exit without
saving, press tto highlight No
and press OK.

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Setup options
1 From the Contractor Menu, highlight Set Up and press OK.
2 Press sor tto 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
tto highlight EXIT and press OK.
ISU # Description Setting
1160 Temperature
indication scale
0 = Fahrenheit
1 = Celsius
2120 Heating system type 1 = Conventional forced air heat
2 = Heat pump
3 = Radiant heat
5 = None (cool only)
2140 Heating equipment
type
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

15
ISU # Description Setting
2160 Reversing valve O/B 0 = O (O/B on cool)
1 = B (O/B on heat)
2180 Cool stages /
compressor stages
0, 1, 2
2200 Heat stages /
backup heat stages
Heat stages: 0, 1, 2
Backup heat stages: 0, 1
2220 Fan operation in heat 0 = No fan
1 = Equipment controls fan
2 = Thermostat controls fan
2240 Backup heat type 31 = Electric forced air
32 = Gas/Oil Forced air (or Fossil forced air)
2260 External Fossil Fuel
Kit
0 = Thermostat controls backup heat
1 = External Fossil Fuel Kit controls backup heat
3120 Staging control
- backup heat
differential
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)
3140 Backup heat upstage
timer
Off
30, 45, 60, 75, 90 minutes
2, 3, 4, 5, 6, 8, 10, 12, 14, 16 hours
3160 Compressor lockout /
balance point
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)
3180 Backup heat lockout Off
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)

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ISU # Description Setting
3200 Cool cycles per hour 1 - 6
3220 Cool cycles per hour
- stage 2
1 - 6
3240 Heat cycles per hour 1 - 12
3260 Heat cycles per hour
- stage 2
1 - 12
3280 Backup heat cycles
per hour
1 - 12
4120 Adaptive intelligent
recovery
0 = No
1 = Yes
4160 Minimum setpoint
(Note: Setting applies
to both heat and cool
setpoints)
50°F to 99°F
10.0°C to 37.0°C
4220 Maximum setpoint
(Note: Setting applies
to both heat and cool
setpoints)
40°F to 90°F
4.5°C to 32.0°C
8100 Humidifier type 0 = None
1 = Steam
2 = Bypass or fan powered
8120 Humidification -
window protection
0 = Off
1 = On

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ISU # Description Setting
8140 Humidification
control
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
9100 Dehumidification
equipment
0 = None
1 = A/C with low speed fan
2 = A/C with high speed fan
4 = Whole house dehumidifier
9140 Dehumidification
equipment setup
0 = Normally open
1 = Normally closed
9160 Dehumidification -
overcooling limit
0, 1, 2, 3°F
0.0, 0.5, 1.0, 1.5°C
9180 Dehumidifier fan
control
0 = Thermostat controls fan
1 = Equipment controls fan
10100 Ventilation type 0 = None
1 = ERV / HRV
2 = Passive (fan only)
3 = Fresh air damper
10160 Ventilation fan
control
0 = Thermostat controls fan
1 = Equipment controls fan
10240 Ventilation percent
on time
10% to 100% (in 10% increments)
10280 Ventilation low
temperature lockout
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)

18
ISU # Description Setting
10300 Ventilation high
temperature lockout
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)
10320 Ventilation high dew
point lockout
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)
11100 Home heat setpoint 40°F to 90°F
4.5°C to 32.0°C (in 0.5°C increments)
11120 Home cool setpoint 50°F to 99°F
10.0°C to 37.0°C (in 0.5°C increments)
11140 Setpoint for away
mode
0 = Away setpoints
1 = Smart temperature setpoints
11160 Away heat setpoint 40°F to 90°F
4.5°C to 32.0°C (in 0.5°C increments)
11180 Away cool setpoint 50°F to 99°F
10.0°C to 37.0°F (in 0.5°C increments)
14020 Temperature display
offset
3°F to 3°F
14025 Humidity % offset 12% RH to 12% RH

19
Advanced Setup
Change Language
To change the language to either English, French, or Spanish:
1From the Main Menu, press tto highlight Language and press OK.
2Press tto highlight the desired language and press OK.
3To save and confirm the changes, highlight Yes and press OK. To exit without
saving, press tto highlight No and press OK.
View Device Details
To view device details, such as model, version, WiFi version, and date code:
1From the Main Menu, press tto highlight Device Details and press OK.
2Press OK to exit back to the main menu.
Perform a System Test
To perform a system test:
1From the Contractor Menu, press tto highlight the System Test and press OK.
2Press tto highlight the category and press OK.
3Press tto highlight the test and press OK.
4Once the test is complete, press OK to return to the Contractor Menu.
View Power Supply Details
To view power supply details, such as battery status and eternal power details:
1 From the Contractor Menu, press tto highlight Power Supply and press OK.
2Press OK to exit.

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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.