Sensi WG4 Wifi Touch Smart Thermostat
Designed by the pros for the pros
There are a lot of choices when it comes to buying a thermostat but only one combines 125 years of experience and the latest connected home technology to empower your customers to take control of their comfort from anywhere. We proudly connect you to a professional-grade thermostat that you can offer your customers with confidence and that will keep you connected with them even after the initial install.
Sensi partner program
Always be the Contractor-On-Call with your customers. The Sensi app saves your contact information so when your customer needs service, you’re just a tap away. Register at www.sensiregistration.com.
Need help?
Visit sensicomfort.com/support for around-the-clock access to support articles, instructional downloads and comprehensive support videos. Our highly-trained Sensi Support Team is available seven days a week. 1.888.605.7131
[email protected]
Easy to install and connect
Sensi is designed to install a standard thermostat. It gives you the flexibility to connect to Wi-Fi at installation or let your customer connect it later using the Sensi app.
MOBILE DEVICE COMPATIBILITY
OPERATING SYSTEM COMPATIBILITY
- iOS: Yes
- Android: Yes
- Amazon Fire: Yes
SMART HOME PLATFORM COMPATIBILITY
OPERATING SYSTEM COMPATIBILITY
- Wink: Yes
- Amazon Alexa: Yes
- Apple HomeKit: Yes
HVAC SYSTEM COMPATIBILITY
| SYSTEM TYPE | COMPATIBILITY | MODIFICATIONS |
| Conventional heating and cooling
•Gas furnace •Electric furnace •Boiler |
Yes | Requires a common wire (c-wire) |
| Heat only
• Gas furnace • Electric furnace • Boiler |
Yes | Requires a common wire (c-wire) |
| Cool only
• Air conditioner |
Yes | Requires a common wire (c-wire) |
| Heat pump | Yes | Requires a common wire (c-wire) |
| Communicating proprietary systems | No | Needs standard HVAC wiring |
| Line voltage | No | Requires low voltage (20-30VAC) |
| Millivolt systems | No | Requires 20-30VAC |
What’s in the box?
- Sensi Thermostat
- Screws and Anchors
- Wire Labels
- Sensi Security Code (found on the back of the Welcome Guide)
Items needed for Wi-Fi connection:
- The homeowner’s compatible iOS or Android
- A device with the Sensi app installed and registered
- Your customer’s Wi-Fi network name (SSID) and password
QUICK TIP: Ask the homeowner to download the Sensi app and gather their Wi-Fi information while you are installing the thermostat.
Installation
Install Sensi thermostat, referring to these terminal definitions, cross references and wiring diagrams as needed:
| OLD THERMOSTAT | SENSI THERMOSTAT | CONVENTIONAL HEAT PUMP SYSTEM SYSTEM |
| RH | RH* | Power for heating, 24V |
| RC, R | RC* | Power for cooling, 24V |
| C, X, B** | C | Common wire, 24V |
| Y, Y1 | Y | 1st stage cool 1st outdoor stage heat |
| Y2 | Y2/* | 2nd stage is cool 2nd the outdoor stage is heat and cool |
- Two transformer systems (separate RC and RH wires), a clip jumper are located on the backplate to the right of the terminals.
- Label “B” as “C” only if the old thermostat also had a wire in “O”. If there is no wire on “O”-label the wire “B”.
- On Heat Pump system with separate W2 and E wires, label both wires W/E (2 wires in one terminal).
SINGLE-STAGE OR MULTI-STAGE SYSTEM WITH NO HEAT PUMP WITH TWO TRANSFORMERS
HEAT PUMP SYSTEMS
After installation, configure the thermostat to the appropriate system type. Press “Menu” on the thermostat and refer to these menu options as needed:
CONFIGURATION MENU ITEMS REFERENCE
| No. | Menu item | Default | Options |
| 1 | Screen Brightness | Off | Adjust resting state brightness with an option to turn off |
| 2 | Nightlight | Off | Off / On |
| 3 | Home Screen Content | On | Indoor Humidity |
| On | Time of Day | ||
| °F | °F / °C | ||
| 4 | Schedule | – | 5 / 2 Day Schedule |
| 5 | Wi-Fi | O | Connect to Wi-Fi |
| 6 | Time Setup | – | Set the date and time |
| 7 | About Thermostat | – | Model Number / Reset |
| 8 | Setup HVAC | AC2 / EL2 | |
| AC2 | Outdoor Setup AC1/ | ||
| AC2/HP1/HP2/AC0 | |||
| EL2 | Indoor Setup GA1/ | ||
| GA2/EL1/EL2/Fan | |||
| O | Reversing Valve Position O/B/3 |
Once the thermostat is installed and properly configured, test the equipment by following these steps:
- Turn on the power to the system.
- Fan Operation
- If your system does not have a “G” terminal connection, skip to “Heating System” below.
- Press the “Fan” button on the thermostat and select the “On” position. The blower should begin to operate.
- Press the “Mode” button to turn off the system. Then press the “Fan” button on the thermostat and select the “Auto” position. The blower should stop immediately.
Heating System
- Press the “Mode” button on the thermostat and select the “Heat” position.
- Press the up arrow on the thermostat and adjust the setting to 1° above the current room temperature. The heating system should begin to operate and the thermostat display will turn red indicating heating on the screen.
- For heat pumps with auxiliary, press the up arrow on the thermostat and adjust the setting to 3° above the current room temperature. The auxiliary heat should begin to operate and the thermostat will indicate “Heating Auxiliary” on the screen.
- Press the down arrow on the thermostat and adjust the setting to 1° below the current room temperature.
- The heating system should stop operating and the display will go back to a neutral gray color.
- Auxiliary System (only for heat pumps with auxiliary)
- Press the “Mode” button on the thermostat and select the “Aux” position. This bypasses the heat pump and runs auxiliary-only heat.
- Press the up arrow on the thermostat and adjust the setting to 1° above the current room temperature. The auxiliary heating system should begin to operate and the thermostat will indicate “Heating Auxiliary” on the screen.
- Press the down arrow on the thermostat and adjust the setting to 1° below the current room temperature. The auxiliary heating system should stop operating and “Heating Auxiliary” will disappear from the screen.
- Cooling System
- Press the “Mode” button on the thermostat and select the “Cool” position.
- Press the down arrow and adjust the setting to 1° below the current room temperature. The blower should come on immediately on high speed, followed by cold air circulation. The thermostat display will turn blue. Note that there can be up to a 5-minute delay for this process. This is indicated by a flashing setpoint temperature.
- Press the up arrow and adjust the setting to 1° above the current room temperature. The cooling system should stop operating and the display will go to a neutral gray color.
- If you encounter any issues while testing the equipment, refer to the troubleshooting actions on page 14.
Troubleshooting
Connecting Sensi to Wi-Fi
- Ask the homeowner to download the free Sensi app onto their iOS or Android device.
- Ask the homeowner to follow the prompts to create an account.
- Once the homeowner has logged in, ask to use their device to connect the thermostat to the Wi-Fi.
QUICK TIP: You must have your customer’s Wi-Fi Network (SSID) and Password, along with the Sensi Security Code card to complete the wireless setup. - Select “Connect Thermostat to Wi-Fi” and follow the in-app prompts to complete the connection steps.
- Once the thermostat is connected to Wi-Fi, enter your registered phone number by selecting “Contractor” from the drop-down menu.
Warnings
INSTALLER INFORMATION
FAILURE TO READ AND FOLLOW ALL INSTRUCTIONS CAREFULLY BEFORE INSTALLING OR OPERATING THIS CONTROL COULD CAUSE PERSONAL INJURY AND/OR PROPERTY DAMAGE.
- WARNING: OUT OF PHASE
TRANSFORMERS
On two transformer systems, the transformers MUST be in phase. Measure the voltage across RC and RH. If more than 12 Volts AC is present between RC and RH, then the transformers are NOT in phase. - To correct this condition, reverse the secondary low-voltage connections at either the Heating or Cooling transformer.
- To prevent electrical shock and/or equipment damage, disconnect the electric power to the system at the main circuit breaker box until installation is complete.
- FOR CALIFORNIA RESIDENTS:
WARNING:
This product contains a chemical known to the state of California to cause cancer and birth defects and other reproductive harm. - VOLTAGE REQUIREMENTS
Do not use on circuits exceeding specified voltage. Higher voltage will damage control and could cause shock or fire hazards.
Thermostat installation and all components of the control system shall conform to Class II circuits per the NEC code. - CAUTION: E5 Alert
If “Call For Service” is displayed on your Sensi thermostat, and E4 or E5 appears where the room temperature should be displayed or the backlight is flashing, please call our support team immediately at 888.605.7131 - ATTENTION: MERCURY NOTICE
This product does not contain mercury.
However, this product may replace a product that contains mercury. - Mercury and products containing mercury must not be discarded in household trash. Refer to the thermostat recycler. org for a location to send products containing mercury.
For Your Customer
MAKE SURE TO LEAVE THE SENSI WELCOME GUIDE FOR YOUR CUSTOMER.
It provides helpful instructions and information on the following:
- Includes their Sensi Security Code for connecting to Wi-Fi
- How to connect their Sensi thermostat to Wi-Fi (if this has not already been completed) or connect additional devices
- Key features of the thermostat and the app and how they work
- Customer Support
DOWNLOAD MANUALS:
Sensi WG4 Wifi Touch Smart Thermostat Installation Manuals
OTHER MANUALS:
Sensi WG4 Wifi Touch Smart Thermostat Product Data Sheet
