The Sensi Touch Wi-Fi Thermostat (models: 1F95U-42WF series, ST75 series, NH-AWIFI, OH-AWIFI) is a Wi-Fi enabled touchscreen programmable thermostat for 24V HVAC systems. It offers smart control via the Sensi app, including scheduling, remote access, and energy savings. Compatible with single/multi-stage conventional systems, heat pumps, and more. Requires C-wire. Below are the key specifications and operation instructions.
1. Download Sensi App: Install from App Store or Google Play; create account with email.
2. Power On: Install on wall after wiring (see Section 3); screen activates.
3. Configure System:
1. Available only when Wi-Fi is Off.
2. Press Menu > Time Setup.
3. Select date or time to edit.
4. Adjust using up/down arrow buttons.
5. Press Save.
6. Use back arrow to return.
1. Turn Schedule Off via menu or app.
2. Adjust set point using up/down arrows.
3. Thermostat holds temperature in set system mode until Schedule is turned On or set point is adjusted again.
4. System Mode: Press Mode button to switch between Heat, Cool, Off, Aux, Auto.
5. Fan Mode: Press Fan button to switch between Auto (thermostat controls) or On (continuous run).
1. Schedule On (via app for Wi-Fi connected; manual for non-Wi-Fi).
2. Controls based on time/temperature set points.
3. Manual Schedule (Wi-Fi Off): Menu > Schedule > Toggle On > Edit weekdays/weekend > Select 4 set points > Adjust time/temperature with arrows > Save.
4. Temporary Hold (Schedule On): Adjust up/down arrows on unit or app; holds new temperature until next scheduled set point (minimum 2 hours); displays hold time next to set temperature.
1. Circulating Fan: Menu > Advanced Setup > Fan Mode Options > Toggle On > Set percentage (10%-100%, 5% increments) with up/down arrows > Back arrow. (Example: 50% runs fan 30 minutes/hour; subtracts heat/cool runtime.)
2. Humidification Setup: Menu > Advanced Setup > Humidification > Toggle On/Off > Set level (5%-50%, 5% increments, default 40%). (Recommended for contractors if accessory installed.)
3. Dehumidification Setup: Menu > Advanced Setup > Dehumidification > Toggle On/Off > Set level (40%-95%, 5% increments, default 50%). (Recommended for contractors if accessory installed.)
4. HVAC Equipment Setup: Menu > Advanced Setup > Set system type (Outdoor: AC1/AC2/HP1/HP2/None; Indoor: GA1/GA2/EL1/EL2/Fan; Reversing Valve: O/B/6/None; Accessories: Yes/No for humidifier/dehumidifier).
5. Remote Control: Via Sensi app with Wi-Fi.
6. Energy Saving: Usage reports, geofencing, alerts.
7. Voice Control: Compatible with Alexa, Google Assistant, HomeKit.
8. HVAC Monitoring: System alerts via app.
Warning: Turn off power at breaker before starting. DIY or professional installation. Requires C-wire for power.
Match wire labels to terminals. Clip RH/RC jumper if separate transformers. Access config: Menu > Advanced Setup.
| System Type | Key Connections |
|---|---|
| Conventional Single Stage | RH/RC to RH/RC, C to C, G to G, Y to Y, W to W/E |
| Heat Pump Single Stage | RH/RC to RH/RC, C to C, G to G, Y to Y, O/B to O/B |
| Two-Stage Conventional | RH/RC to RH/RC, C to C, G to G, Y to Y, Y2 to Y2, W to W/E, W2 to W2 |
| Dual Fuel Heat Pump | RH/RC to RH/RC, C to C, Y to Y, O/B to O/B, W to W2 |
| Humidifier/Dehumidifier | Y2 or W2 for accessories |
Caution: Ensure secure connections. Configure system type in app or Menu during setup. C-wire required.
Terminal Definitions:
Menu Configurations Reference:
| Menu Item | Default | Options |
|---|---|---|
| Sleep Mode | Off | On/Off |
| Backglow | Off | On/Off |
| Home Screen Content | On | Humidity/Time/°F/°C/Schedule |
| Wi-Fi | - | Connect/Off |
| Schedule | On | 5/2 Day |
| Time Setup | - | Manual (Wi-Fi off) |
| Outdoor Setup | - | AC1/AC2/HP1/HP2/None |
| Indoor Setup | - | GA1/GA2/EL1/EL2/Fan |
| Reversing Valve | None | O/B/6/None |
| Circulating Fan | Off | 10%-100% (5%) |
| Humidify | Off | 5%-50% (5%) |
| Dehumidify | Off | 40%-95% (5%) |