Sensi WIFI Thermostat User Guide

The Sensi Smart Thermostat can be operated through Wi-Fi using the Sensi app or it can be operated at the actual wall unit. Advanced features such as thermostat settings, scheduling, and email alerts are only available through the Sensi app.

Buttons and Features

Sensi WIFI Thermostat User Guide
1WI-FI STATUS ICON
Indicates Wi-Fi connection status. When you turn the Wireless Off on the thermostat, this is blank.
2BACKLIGHT BUTTON
Illuminates the thermostat for 10 seconds
3TIME
Displays current time.
4KEYPAD LOCKOUT ICON
This icon indicates the thermostat is locked out. No changes can be made to the thermostat. (Can only be enabled from the Sensi app).
5BATTERY ICON
When the bars get low, remember to change the 2 AA Alkaline batteries in the back of the thermostat face plate
6UP ARROW BUTTON
Adjusts the temperature set point or thermostat configuration.
7CURRENT SET TEMPERATURE
The current set temperature the thermostat will maintain.
8MENU BUTTON
Access thermostat configurations.
9DOWN ARROW BUTTON
Adjusts the temperature set point or thermostat configuration.
10CURRENT ROOM TEMPERATURE
The room temperature at the thermostat.
11SCHEDULE BUTTON
Toggles the schedule On or Off. (The thermostat runs a program based on the time and temperature set points when the Schedule is On)
12FAN BUTTON
Switches fan mode from Auto or On. Leave the fan mode on Auto to allow the thermostat to control the fan as necessary.
13MODE BUTTON
Switches system mode between Heat, Cool, Off or Aux. (Auto Mode is only available using the Sensi app).

Switching System Mode


Press the “Mode” button to switch between all available system mode settings. When
the Mode is “Off” the thermostat will not bring on your heating or cooling systems.

Sensi WIFI Thermostat User Guide

Fan Mode

If you want to circulate the indoor blower, you can switch the Fan to “On.” Turn the
Fan back to “Auto” when you want the thermostat to control your indoor blower
as necessary. Leaving the Fan in “On” will run your blower continuously.

Sensi WIFI Thermostat User Guide

Holding One Temperature

If you want to hold one temperature, turn Schedule “Off.” Then, adjust the
set point using the up and down arrow buttons. The thermostat will hold
this temperature, in the set Mode, until you turn Schedule back “On” or until
you adjust the set point again using the up and down arrow buttons.

Sensi WIFI Thermostat User Guide

Temporary Hold

When your schedule is set to “On,” your Sensi thermostat controls your home based on
the time and temperature settings in the current schedule. To temporarily change your
temperature using the up and down arrows in the app or on the thermostat. Your Sensi
thermostat will display “Temporarily Set To” on the thermostat and will hold your new
temperature until the next scheduled set point with a minimum hold time of two hours.

Sensi WIFI Thermostat User Guide

Circulating Fan

If you want to circulate the air in your home using your indoor blower fan, you can set
this feature in the app or at the thermostat. A percentage is selected to indicate how
often the fan should run each hour, You can set 5% increments from 10% – 100%.


EXAMPLE:
If you set the Circulating Fan to 50%, the fan will run for 30 minutes every hour.
If any heat/cool cycles occur during the hour, their runtime
is subtracted from the overall fan run time.

Setting the Feature from the Thermostat

  1. Press “Menu”
  2. Press “Next” until you come to “Fn Setup”.
  3. Use the up arrow button to toggle the percentage you’d like the fan to run each hour.
  4. Press “Exit”

Turn Wi-Fi Off

If connecting to Wi-Fi is not an option, you can turn off Wi-Fi on the thermostat
and manually set a time and a schedule from the wall unit. To turn off Wi-Fi:

  1. Press “Menu”.
  2. Press “Next” until you see “Wireless (Setup)” at the top of the screen.
    “On” should be flashing at the top.
  3. Use the up or down arrow button to change it to “Off”.
  4. Press “Exit”.

Setting the Time Manually

When connecting the thermostat to Wi-Fi, the time will sync automatically. If not connecting to Wi-Fi, follow these steps to set the time at the thermostat.

1. Turn Wi-Fi Off. (Refer to section “Turn Wi-Fi Off” on page 4).

2. Press and hold the “Schedule” button.

3. The screen will go blank and the time will start flashing at the top. Use the up and down arrow buttons to rotate through the times until you get to the appropriate time of day.

4. Press “Exit”.

Sensi WIFI Thermostat User Guide

Setting a Schedule

When connecting the thermostat to Wi-Fi, the schedule is programmed based on time and temperature set points from the Sensi app. If you are not connecting to Wi-Fi, follow these steps to set a basic 7-day schedule with 4 mandatory set points. (More robust scheduling options are only available through the Sensi app.)

  1. Turn Wi-Fi Off. (Refer to section “Turn Wi-Fi Off” on page 4).
  2. Use the “Mode” button to set which type of schedule it will be: Heat or Cool.
  3. Press and hold the “Schedule” button, until you see the time flash at the top of the screen.
    a. Adjust the time on the thermostat if needed, using the up and down arrow buttons.
  4. Press “Next”
  5. You will see a large number in the middle of the screen. This refers to your set point.
    a. The time will be flashing at the top of the screen. Adjust the time of
    the first set point using the up and down arrow buttons.
    b. Press “Next”. The set point will be flashing. Adjust the set
    point using the up and down arrow buttons.
    c. Press “Next”.
    d. Repeat steps a-c for the second, third and fourth set points.
  6. Press “Exit”.
  7. Make sure “Schedule” is set to “On” on the thermostat.

Menu Configurations

Pressing “Menu” at the thermostat allows you to change a series of settings to customize the thermostat for your specific system. Refer to the chart below for a complete listing of thermostat configurations and what they stand for. If you are installing the thermostat on the wall for the first time, we highly recommend that you download the Sensi app and follow the installation instructions. However, if you are experiencing an issue or you want to check your system configurations, you can manually configure your thermostat as well. Learn more about how to properly configure your thermostat by searching “configure” on our support site at sensi.emerson.com/en-us/support.

Display CodeMenu ItemDefaultOptions
Wireless Setup
Connects Thermostat to Wi-Fi network
Connect
Fahrenheit or CelsiusFF or C
Outdoor Equipment
Configuration
Cooling or heat pumps
AC2AC1 – Conventional Cooling 1
(Single Stage)

AC2– Conventional Cooling 2 (Two-Stage)

HP1 – Heat Pump 1 (Single Stage)

HP2– Heat Pump 2 (Two-Stage)

AC0– No Cooling
Indoor Equipment Configuration
For Gas or Electric Heat
EL2EL1– Electric 1 (Single Stage)

EL2– Electric 2 (Two-Stage)
FAn

GA1 Gas 1 (Single Stage)

GA2 Gas 2 (Two-Stage)
Reversing Valve Position Selects “O” or
“B” Setting For Heat Pumps Only
OO
B
2
FnCirculating FanOFFOff/10% – 100% (5% increments)
H AAHumidification
Add Accessory
OFFOFF/ON
H SPHumidification
Set Point
OFFOFF/5% – 50% (5% increments)
dH AADehumidification
Add Accessory
OdOd/Oc

Od – Optimal dehumidification
(Overcool to dehumidify)

Oc – Optimal comfort
(Wired dehumidification)
dH SPDehumidification
Set Point
OFFOFF/40% – 95% (5% increments)
Wireless Radio
Turns Wi-Fi Radio On/Off
ONOFF/ON

Terminal Outputs and Wiring Diagrams

Terminal LabelDefinition
RH*Power for heating, 24V
RC*Power for cooling, 24V
C**Common wire, 24V
GIndoor blower (fan)
YFirst outdoor stage cooling on conventional systems or first heat and cool on heat pump systems.
Y2/*Second outdoor stage cooling on conventional systems or second heat and cool on two-stage heat pump systems or the humidifier.
W/EFirst indoor stage heat on conventional systems or first stage auxiliary/emergency heat on heat pump systems
W2/*Second indoor stage heat on conventional systems or second stage auxiliary/ emergency heat on heat pump systems or the dehumidifier.
O/BChangeover (reverse valve) connection for heat pump or zone panel systems
LHeat Pump system, “L” wire connection

*If the old thermostat has separate RC and RH wires coming out of the wall, clip the RC/
RH jumper on the back of the thermostat above the battery compartment.


**The common wire could be labeled “C” on your old thermostat, or it could be labeled “B” or “X.” Please refer to the owner’s manual of your old thermostat for clarification.

Does Wire Color Correspond to the Thermostat Terminals?

Wire color does not always correspond to the thermostat letters. A white wire may be attached to the “W” terminal on the old thermostat, or it may be attached to a different terminal with a different letter. Be sure to take a photo of the old thermostat that shows the wire colors and terminal letters before labeling and removing any wires.

Below is a picture of the back of the Sensi thermostat face plate. The back plate shows the jumper wires, battery compartment, and some useful information about your thermostat.

Sensi WIFI Thermostat wire diagram
1SENSI SECURITY CODE
Necessary for connecting to Wi-Fi. Also found in the Welcome Guide in the packaging
2MODEL NUMBER
Illustrates whether you purchased the professional or the DIY model.
3APPLE HOMEKIT CODE
The 8-digit
code used to add Sensi Thermostat to Apple HomeKit.
4RC/RH INTERNAL JUMPER WIRE
Only clip this if you have separate RC and RH transformers coming out of the wall.
5BATTERY COMPARTMENT
Two AA Alkaline batteries are used for backup purposes. When you see the battery indicator bar on the thermostat display reach 3 bars, replace these batteries to maintain Wi-Fi connectivity.
6DATE CODE
When your thermostat was manufactured.
7MAC ID
A unique
number that identifies the thermostat.

Sensi Wi-Fi User Manual