sensi Smart Thermostat Instruction Manual
sensi Smart Thermostat Instruction Manual
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.
1. WI-FI STATUS ICON
Indicates Wi-Fi connection status. When you turn Wireless Off onthe thermostat, this is blank.
2. BACKLIGHT BUTTON
Illuminates the thermostat for 10 seconds
3. TIME
Displays current time.
4. KEYPAD LOCKOUT ICON
This icon indicates the thermostat is locked out. No changes can be made at the thermostat. (Can only be enabled from the Sensi app).
5. BATTERY ICON
When the bars get low, remember to change the 2 AA Alkaline batteries in the back of the thermostat faceplate.
6. UP ARROW BUTTON
Adjusts the temperature setpoint or thermostat configuration.
7. CURRENT SET TEMPERATURE
Current set temperature the thermostat will maintain.
8. MENU BUTTON
Access thermostat configurations. (See page 6 for more details).
9. DOWN ARROW BUTTON
Adjusts the temperature set point or thermostat configuration.
10. CURRENT ROOM TEMPERATURE
The room temperature at the thermostat.
11. SCHEDULE BUTTON
Toggles the schedule On or Off. (The thermostat runs a program based on time and temperature set points when Schedule is On).
12. FAN BUTTON
Switches fan mode from Auto or On. Leave the fan mode on Auto to allow the thermostat to control the fan as necessary.
13. MODE BUTTON
Switches system mode between Heat, Cool, Off or Aux. (Auto Mode is only available using the Sensi app).
BASIC FUNCTIONALITY
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.
Fan Mode
If you want to circulate the indoor blower, you can switch 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.
Holding One Temperature
If you want to hold one temperature, turn Schedule “Off.” Then, adjust the setpoint 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.
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 use 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.
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 dictate 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 un 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”.
MANUAL SETTINGS
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”.
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 setpoint using the up and down arrow buttons.
b. Press “Next”. The setpoint will be flashing. Adjust the setpoint 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.
Example Schedule
If you need to keep track of your time and temperature set points, use this table.
SAMPLE SCHEDULE
PERIOD | DAILY START TIME | DAILY TEMP | |
| Heat | 1st | 6:00 am | 70° F |
| 2nd | 8:00 am | 62° F | |
| 3rd | 5:00 pm | 70° F | |
| 4th | 10:00 pm | 62° F | |
| Cool | 1st | 6:00 am | 78° F |
| 2nd | 8:00 am | 85° F | |
| 3rd | 5:00 pm | 78° F | |
| 4th | 10:00 pm | 82° F | |
COMPLETE YOUR SCHEDULE
PERIOD | DAILY START TIME | DAILY TEMP | |
| Heat | 1st | 6:00 am | |
| 2nd | 8:00 am | ||
| 3rd | 5:00 pm | ||
| 4th | 10:00 pm | ||
| Cool | 1st | 6:00 am | |
| 2nd | 8:00 am | ||
| 3rd | 5:00 pm | ||
| 4th | 10:00 pm | ||
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 Code | Menu item | Default | Options |
| Wireless Setup Connects Thermostat to Wi-Fi network | Connect | ||
| Fahrenheit or Celsius | F | F c | |
| Outdoor Equipment Configuration Cooling or heat pumps | AC2 | AC1 – 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 | EL2 | EL1– 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 | 0 | O B 2 | |
| Fn | Circulating Fan | OFF | Off/10% – 100% (5% increments) |
| H AA | Humidification Add Accessory | OFF | Off/On |
| H SP | Humidification Set Point | OFF | Off/5% – 50% (5% increments) |
| dH AA | Dehumidification Add Accessory | Od | Od/Oc Od – Optimal dehumidification (Overcool to dehumidify) Oc – Optimal comfort (Wired dehumidification) |
| dH SP | Dehumidification SetPoint | OFF | Off/40% – 95% (5% increments) |
| Wireless Radio Turns Wi-Fi Radio On/Off | ON | Off/On |
WIRING TERMINALS
See below for definitions of the wiring terminals on the sub-base of the thermostat.
Terminal outputs and wiring diagrams
| TERMINAL LABEL | DEFINITION |
| RH* | Power for heating, 24V |
| RC* | Power for cooling, 24V |
| C** | Common wire, 24V |
| G | Indoor blower (fan) |
| Y | First 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 humidifier |
| W/E | First 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 dehumidifier |
| O/B | Changeover (reverse valve) connection for heat pump or zone panel systems |
| L | Heat 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.
BACK OF THE FACEPLATE
Below is a picture of the back of the Sensi thermostat faceplate. The backplate shows the jumper wires, battery compartment, and some useful information about your thermostat.
- SENSI SECURITY CODE
Necessary for connecting to Wi-Fi. Also found on the Welcome Guide in the packaging. - MODEL NUMBER
Illustrates whether you purchased the professional or the DIY model. - APPLE HOMEKIT CODE
The 8 digit code used to add Sensi Thermostat to Apple HomeKit.. - RC/RH INTERNAL JUMPER WIRE
Only clip this if you have separate RC and RH transformers coming out of the wall. - BATTERY 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. - DATE CODE
When your thermostat was manufactured. - MAC ID
Unique number that identifies the thermostat.
FAQS
It’ll retain the settings
It changes from color when heat is engaged. Almost an orange color. The actual brightness does not change unless you physically touch it.
one each zone
There is no physical battery backup, but since it’s connected to the internet, your settings are saved. And you can pretty
much do anything off your phone with the app. If the power goes out, your hvac probably won’t work anyway.
According to the documentation yes, “Conventional 2H/2C”. I’m not utilizing it with that type of application.
Yes… the UPPER value goes to 99 degrees.
The thermostat may beep when you first turn it on. This is normal. If the thermostat continues to beep, turn the power off and then back on. If this does not stop the beeping, contact Customer Support at 1-866-972-8378.
To change the batteries in your thermostat, remove the faceplate to access the battery compartment. Remove the old batteries and replace with two new AA Alkaline batteries. Make sure that the positive (+) side of the battery is facing up. Replace the faceplate and turn your thermostat back on to continue using it.
Your Wi-Fi network credentials are printed on a sticker located inside your Sensi Smart Thermostat’s battery compartment.
The Sensi Touch Smart Thermostat allows for a temperature offset of +/- 5 degrees.
Yes, though they call it “cycle rate” and not “swing” and the setting is FAST, MEDIUM, or SLOW. You can set a separate “cycle rate” for heat and cool.
The sensi touch is only 2.4 ghz
Yes
The black and silver version are probably discounted due to being less popular. There may be a lot of them sitting on shelves not moving.
Yes. Mine has a usage tab. It will tell you by day for the last week and by month. Runtime of ac, fan only, or heat.
It’ll retain the settings
It changes from color when heat is engaged. Almost an orange color. The actual brightness does not change unless you physically touch it.
one each zone
There is no physical battery backup, but since it’s connected to the internet, your settings are saved. And you can pretty much do anything off your phone with the app. If the power goes out, your hvac probably won’t work anyway.
According to the documentation yes, “Conventional 2H/2C”.
Not sure.
Yes… the UPPER value goes to 99 degrees. Sounds like it’ll work for you.
Yes, though they call it “cycle rate” and not “swing” and the setting is FAST, MEDIUM, or SLOW. You can set a separate “cycle rate” for heat and cool.
The sensi touch is only 2.4 ghz
Easier to program through touch screen than though app, but app is not difficult.
The mounting plate is included but does not cover anything larger than the size of the thermostat. amazon does sell a larger size back plate to cover extra holes or missing paint not included with this stat.
Yes.
The black and silver version are probably discounted due to being less popular. There may be a lot of them sitting on shelves not moving.
Yes. Mine has a usage tab. It will tell you by day for the last week and by month. Runtime of ac, fan only, or heat.
If you are talking about electric baseboard heat (110v or 220V), no. If it’s hot water baseboard heat from a boiler system, then most likely it would work (that’s what I have, along with a separate A/C system, and it works great).
Yes it will. You will tell it in the settings you have a heat pump when setting it up.
No
Yes have mine set to a mesh system.
Yes. It also tells you how long your emergency heat is running and keeps daily and monthly records off it
VIDEO
Documents / Resources
 | sensi Smart Thermostat [pdf] Instruction Manual Smart Thermostat, 1F87U-42WF, ST55 |
Sensi Support | Sensi US
