sensi 1F96U-42WF Series Touch 2 Smart Thermostat Installation Guide
- October 27, 2023
- sensi
Table of Contents
**sensi 1F96U-42WF Series Touch 2 Smart Thermostat Installation Guide
**
DOWNLOADING THE APP AND CREATING AN ACCOUNT
YOU WILL NEED
Gather this information before you begin installation for a smoother walk through.
- Wi-Fi Network Name/SSID (Make sure this is a 2.4GHz network)
- Wi-Fi Network Password
- Screwdriver
- Hardware in Sensi Touch 2 Smart Thermostat packaging
DOWNLOAD THE SENSI APP
The Sensi Touch 2 Smart Thermostat is a Wi-Fi enabled device. To install and configure your thermostat correctly, you must use the Sensi app. To start the installation process, download the Sensi app to your smart phone or tablet. It is a free download.
Scan the QR code to download the Sensi app
CREATE AN ACCOUNT
When you download the Sensi app, you will be prompted to create an account. This is required to access your thermostat remotely and use all the features Sensi offers. Use a valid email address and a password of your choosing to create an account. Remember this email address and password. Your Sensi thermostat will be linked to this email address once it is registered.
INSTALLING THE SENSI THERMOSTAT
STEP 1
Add your thermostat to the Sensi App
INSTALLATION
Once you have downloaded the Sensi app, and have created an account, you
are ready to install the thermostat to your wall and connect it to Wi-Fi. If
no thermostats are registered yet, tap the plus (+) sign to add a thermostat.
First, choose which thermostat you purchased. The Sensi Touch 2 Smart
Thermostat option is for the following model number
- 1F96U-42WF series
- ST76 series
Note: You can check your model number on the back of the thermostat cover.
STEP 2
Is your Sensi thermostat already on your wall?
INSTALL PATH
After choosing your Sensi model, tap New Installation.
Next select whether your thermostat Is Currently Mounted or Not
Mounted on the wall.
NOT MOUNTED
This option walks you through a full step-by-step installation process. You
will identify which wires are on your original thermostat, how to label them
for Sensi, how to connect your wires, and connect to Wi-Fi.
If you did not have this thermostat professionally installed, choose this
option. It will ensure that your thermostat is properly wired and configured
to work with your HVAC system
IS CURRENTLY MOUNTED
This option is for connecting your thermostat to Wi-Fi only.
If you had a professional install your thermostat, skip to STEP 6 in this
guide, Connecting to Wi-Fi.
Pro Tip:
If you are installing your Sensi thermostat, always select Not Mounted.
Selecting Is Currently Mounted will not automatically configure your
thermostat for the proper HVAC settings based on your wire selections
GATHER TOOLS AND PACKAGE CONTENTS
Gather all the necessary tools for installation.
TURN OFF POWER
Turn off the power to your heating and air conditioning system before
handling your thermostat wires.
STEP 3
Remove old thermostat from wall
REMOVE OLD THERMOSTAT COVER
Remove the cover using a screwdriver or by pushing the pressure latch. Some
covers pull off while others need to be released using a screwdriver.
PHOTOGRAPH YOUR WIRING
THIS IS IMPORTANT. The Sensi app will prompt you to take a picture of
your existing thermostat and old wiring in case you need it later. This can be
helpful for troubleshooting with our technical support team if necessary. The
picture you take will be
saved to your camera roll or photo gallery
THROW AWAY ANY JUMPER WIRES
Sensi has a jumper wire built into it, and you will not need any jumper wires
from your old unit
CHOOSE WIRE TERMINALS
Choose the terminal labels that have wires attached to them on your old
thermostat here. The app will tell you if you have a valid configuration.
If you are getting an invalid configuration message you can learn more about
compatibility at sensi.emerson.com/en-
us/compatibility.
Sensi Touch 2 requires a c-wire.
For more information visit sensi.emerson.com/en-
us/support/c-wire.
FURNACE TYPE
Select what type of system you have.
LABEL YOUR WIRES
Before you disconnect your wires, using the provided wire label stickers,
label your wires by removing one wire at a time.
DISCONNECT WIRES AND REMOVE BASE
After all of your wires are labeled, remove the old thermostat base from the
wall.
STEP 4
Secure new thermostat base to wall
INSTALL SENSI BASE
Use the provided mounting screws and secure the Sensi base to the wall.
STEP 5
Connect wiring and cover
CONNECT THE WIRES
Once the Sensi base is mounted and secured on the wall, insert the wires into
the terminals. Simply push the wires into the terminal slots.
ATTACH COVER
Push the thermostat cover onto the base.
TURN ON POWER
Turn the power to your system back on
STEP 6
Connecting to Wi-Fi and registering your thermostat
CONNECTING TO WI-FI
By now, you should have the Sensi thermostat wired on the wall. If you are
installing the thermostat, you chose Not Mounted, followed the wiring
instructions, and now you’re ready to connect Sensi to Wi-Fi.
If you had your Sensi professionally installed, you chose Is Currently
Mounted, and you’re ready to connect Sensi to Wi-Fi.
WI-FI SETUP
On the thermostat, press Menu in the top left corner, and then Wi-Fi.
Tap Connect.
SCAN QR CODE
In the app, scan the QR code on your Sensi Touch 2 screen. Bluetooth
Technology will help you connect to Wi-Fi. This will require Bluetooth
permissions on your phone. You can turn on Bluetooth in your phone’s settings.
If you’re having trouble scanning, tap “Use Security PIN” to manually enter
the code on your touchscreen.
SELECT YOUR WI-FI NETWORK
In the list of available networks, select your home Wi-Fi network and then
enter your home Wi-Fi network password.
Pro Tip:
Sensi is only compatible with 2.4GHz networks. If your network does not show
up in the list, it is either hidden or not compatible with Sensi.
NAME THERMOSTAT
You can select a name or choose a custom name for your thermostat. Press
Next to continue.
REGISTER THERMOSTAT
After successfully connecting Sensi, the app will prompt you to register the
thermostat. You can either choose the Locate Me option or fill in your
street address, city, state, zip code, country and time zone manually. Press
Next to continue.
CONTRACTOR INFORMATION (OPTIONAL)
If a contractor professionally installed your thermostat, and registered as a
Sensi partner, they have the option to input their phone number here. If there
is not a registered number available, simply hit Next to continue.
START USING SENSI
Congratulations on successfully installing Sensi. Press Start Using Sensi
to open the main screen of the app
TROUBLESHOOTING
Connecting to Wi-Fi Troubleshooting
If you’re having trouble connecting to Wi-Fi, here are some tips to try:
- Make sure the Sensi app is up-to-date and running the latest version available in your app store.
- Reboot your smart phone.
- Reboot your router by unplugging it from the wall for a few minutes and then plugging it back in.
- Make sure Bluetooth is turned on in your phone settings, and is allowed in the Sensi app permissions.
- Make sure Location access is turned on in your phone settings, and is allowed in the Sensi app permissions.
- Try another smart phone or tablet. Simply download the Sensi app and sign into the app using the email address and password you used when you created your account.
Reconnecting to Wi-Fi
If you replaced your router or changed your Wi-Fi network password, you will
need to reconnect your thermostat to Wi-Fi. This is different depending on
what smart device you are using. Please see our support article for more
information on how to reconnect.
sensi.emerson.com/en-us/support/reconnecting-sensi-thermostat-to-
wif
Blank or flashing display
If you installed a Sensi Touch 2 Smart Thermostat, but the touchscreen is
still blank or only flashes after completing all the steps in the Sensi app,
then most likely the thermostat is not receiving enough power from your system
to turn on or stay on continuously. Sensi Touch 2 requires a “C” wire to power
the thermostat.
I DON’T HAVE A WIRE IN THE “C” TERMINAL.
Sensi requires a “C” wire. If you don’t have a wire in the “C” terminal, check
out our “C” wire videos for DIY installation at sensi.emerson.com/en-
us/c-wire.
If you are installing Sensi to a heat only system, you may be able to install
an external transformer. Learn more about that option by searching “external
transformer” on our support site at sensihelp.com.
I HAVE A WIRE IN THE “C” TERMINAL.
Did you DIY this “C” wire connection? If so, make sure that this wire is
connected to “C” terminal at the thermostat and at your system.
- Go down to your indoor HVAC unit furnace/air handler, reveal your system’s control board, and trace the “C” wire at the thermostat to ensure that it is securely connected to the “C” terminal at the system control board. If you haven’t already, it may help to watch one of the “C” wire videos to see how to access the control board.
- Gently tug the “C” wire at the system control board to ensure that it is screwed into the terminal securely.
- Gently tug all the wires at the thermostat to ensure that they are secure in the terminal block on the sub-base. Do you have a voltmeter? Set your voltmeter to AC and measure the voltage between RH (or RC) and C at the thermostat to ensure that you have between 20-30VAC at the thermostat. If you have less than 20VAC, the thermostat will not turn on.
- Are your breakers on? You turned your power off for installation. Make sure the power is turned on. You may want to try resetting them if they’re turned on already
NOTES
HVAC configuration menu
If you want to check that your thermostat’s HVAC settings were configured
correctly or you’re experiencing a system issue, refer to the chart for
equipment descriptions and options. Learn more about how to properly configure
your thermostat here:
sensi.emerson.com/en-us/support/howdo-i-configure-my-
thermostat
Accessing your Sensi thermostat from other devices
When you log into your Sensi account with your email address and password, the
app will be able to control all the thermostats registered to your Sensi
account.
If you give someone else your email address and password to your Sensi
account, they will be able to log in and control any thermostats registered to
that account. You can change your email address and password from inside the
app. Be aware of this when giving out your information. There is no limit to
the number of devices that can access the thermostat.
Forgot password
If you forgot the password to your Sensi account, click on Forgot Password
on the login screen of the Sensi app. A temporary password will be sent to the
email address that you use to login.
Installing multiple thermostats
If you are installing more than one thermostat, follow the same installation
process in the Sensi app. Once you have one thermostat installed, open the
Sensi app on your phone. At the main screen, press the + sign to add another
thermostat to your account.
Accessing account information
You can use the Account area to access your email preferences, change your
account information and email address associated with your Sensi.
For iOS: Tap the person icon in the upper right hand corner.
For Android: Tap the three dots in the upper right hand corner.
CONFIGURATION MENU ITEMS REFERENCE
Menu item| Description| Options
Outdoor Equipment| Select AC or Heat Pump equipment, as well as the number of
stages. Set this to AC1 for single stage systems or HP1or HP2 for single or
multi-stage heat pumps| AC1/AC2/HP1/ HP2/None
Indoor Equipment| Select whether the equipment is an electric or gas furnace,
or fan only. Set this to EL1 for single stage electric or GA1 or GA2 for
single or multi-stage gas systems.| GA1/GA2/EL1/ EL2/Fan
Reversing Valve Position| When configured for O, reversing valve is energized
in Cooling. This will cover most applications. Some manufacturers such as
Rheem or Rhudd use the B terminal, which would energize in heating. For three-
wire zone hydronic systems set this to Z.| O/B/6/None
Additional Accessories| |
Humidifier (wired to thermostat)| If a humidifier is wired to the thermostat,
change the Humidifier setting to YES| Yes/No
Dehumidifier (wired to thermostat)| If a dehumidifier is wired to the
thermostat, change the Dehumidifier setting to YES.| Yes/No
CONVENTIONAL SINGLE STAGE OR MULTI-STAGE SYSTEMS (NO HEAT PUMP)
†Internal jumper between RC and RH, located on back of thermostat
**HEAT PUMP SYSTEMS
ACCESSORY DEVICE**
2 Wire Accessory
Device has it’s own power source to turn the unit on. Set switch on back of
thermostat to “Accessory”.
1 Wire Accessory
Device pulls power from the HVAC system. Set switch on back of thermostat to
System”.
Technical support
For problems connecting your Sensi thermostat, call or email the Sensi
Technical Support team, and they will be happy to help you or your contractor
walk through any steps needed to troubleshoot the Sensi thermostat.
sensi.emerson.com/en-us/support
(888) 605.7131
[email protected]
References
- Thermostat C-Wire Installation | Sensi US
- Thermostat Compatibility | Sensi US
- Sensi Thermostat & Product Support | Sensi US
- Thermostat C-Wire Installation | Sensi US
- Reconnecting Sensi Thermostat | Sensi US
- Thermostat Compatibility | Sensi US
- Sensi Thermostat & Product Support | Sensi US