Items needed for Wi-Fi connection
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 cool 2nd outdoor stage heat and cool |
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.
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.
Sensi is designed to install like 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 |
SMART HOME PLATFORM COMPATIBILITY
OPERATING | SYSTEM | COMPATIBILITY |
Wink | Yes |
HVAC SYSTEM COMPATIBILITY
SYSTEM TYPE | COMPATIBILITY | MODIFICATIONS |
Conventional heating and cooling • Gas furnace • Air conditioner • Electric furnace • Boiler | Yes | Requires a common wire (c-wire) |
Heat only • Gas 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 | No | Needs standard HVAC wiring |
Line voltage | No | Requires low voltage (20-30VAC) |
Millivolt systems | No | Requires 20-30VAC |
No. | Menu item | Default | Options |
1 | Screen Brightness | Off | Adjust resting state brightness with an option to turn off |
2 | Backglow | 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 | Advanced Setup | HVAC Equipment | Fan Mode Options | |
8a | HVAC Equipment | AC2 / EL2 | |
AC2 | Outdoor Setup AC1/AC2/HP1/HP2/AC0 | ||
Indoor Setup GA1/GA2/EL1/EL2/Fan | |||
EL2 | Reversing Valve Position O/B/3 | ||
O | |||
8b | Fan Mode Options | ||
Circulating Fan | Off | Off – 100% (5% increments) |
Circulating Fan
Heating System
Auxiliary System (only for heat pumps with auxiliary)
Cooling System
SYMPTOM | POSSIBLE CAUSE | CORRECTIVE ACTION |
No Heat/ No Cool/ No Fan (common problem) | 1. Blown fuse or tripped circuit breaker 2. Furnace power switch to OFF 3. Furnace blower compartment door panel loose 4. Loose connection to thermostat or system | 1. Replace fuse or reset breaker 2. Turn switch to ON 3. Replace door panel in proper position to engage safety interlock or door switch 4. Tighten connections |
SYMPTOM | POSSIBLE CAUSE | CORRECTIVE ACTION |
No Cool | 1. Thermostat not set to Cool 2. Loose connection to thermostat or system 3. Cooling system requires service or thermostat requires replacement | 1. Set thermostat to Cool. 2. Verify thermostat and system wires are securely attached. 3. Diagnostic: Set Mode to Cool and lower setpoint below room temperature. Same procedures as diagnostic for “No Heat” condition except set the thermostat to Cool and lower the setpoint below the room temperature. There may be up to a five minute delay before the thermostat clicks in Cooling if the AC Protection feature is on. |
Warnings
VOLTAGE REQUIREMENTS
For Your Customer
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.
Download Manual:
EMERSON ST75W Sensi Touch Wi-Fi Smart Thermostat Installation Mnaual
OTHER MANUALS
EMERSON ST75W Sensi Touch Wi-Fi Smart Thermostat User Manual
EMERSON ST75W Sensi Touch Wi-Fi Smart Thermostat User Guide
EMERSON ST75W Sensi Touch Wi-Fi Smart Thermostat Installation Manual
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