Sensi Touch 2 1F96U-42WF Series Thermostat Operation Manual

The Sensi Touch 2 Smart Thermostat (models: 1F96U-42WF series, ST76 series) 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. Key Specifications 2. Operation Instructions 2.1. Initial Setup 2.2. Setting the Clock and Day 2.3. Operating in Non-Programmable Mode 2.4. Operating in Programmable Mode 2.5. Advanced Features 2.6. Troubleshooting 3. Installation Instructions 3.1. Remove Old Thermostat 3.2. Installing New Thermostat 3.3. Battery Location 3.4. Wiring and Configuration

Key Specifications

Type: Wi-Fi enabled touchscreen programmable smart thermostat for 24V HVAC systems
Compatibility:
- Single/multi-stage conventional (gas/electric), heat pumps, boilers
- Requires C-wire for power
- Works with Sensi app on iOS/Android; compatible with Alexa, Google Assistant, Apple HomeKit
Power Source:
- 24 VAC from HVAC system via C-wire
Electrical Rating:
- 24V systems; max 1A per terminal
- Terminals: RH/RC, C, G, Y/Y1, Y2, W/E, W2, O/B, ACC+/ACC-, L
Temperature Range: 45°F to 99°F (7°C to 37°C); Humidity: 5% to 90% RH non-condensing
Operating Conditions:
- Indoor use only; 40°F to 120°F (4°C to 49°C)
- Wi-Fi: 2.4GHz network required
Dimensions: Compact wall-mount design with touchscreen display
Features:
- 7-day programming via app
- Geofencing, energy reports, remote control
- Touchscreen interface, back glow for installation
- Circulating fan, humidification/dehumidification support
Thermostat Configuration Options:
- Models: 1F96U-42WF series, ST76 series
- UL listed; professional or DIY installation

Operation Instructions

Initial Setup

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:

Select model, system type (gas/electric/heat pump) in app.
Connect to 2.4GHz Wi-Fi via app instructions (Bluetooth-assisted via QR code or PIN).
App guides through scheduling, location, and time zone setup.

Setting the Clock and Day

1. Syncs automatically via Wi-Fi connection.
2. Manual adjustment (Wi-Fi off): Menu > Advanced Setup > Time and Date; tap Edit and adjust.
3. Day auto-detected from app schedule and location.
4. Time zone set during app registration.

Operating in Non-Programmable Mode

1. Select Mode: Tap to cycle Heat, Cool, Off, Aux, Auto.
2. Adjust Temperature: Use Plus/Minus buttons.
3. Fan Control: Tap Fan for Auto/On; Circulate Fan via Menu (10%-100%).
4. Manual Override: Ensure Schedule Off; adjust for permanent hold.

Operating in Programmable Mode

1. Factory Schedule: Default 7-day program via app.
2. Custom Schedule:

Use Sensi app: Schedule tab to set times/temps.
Manual (Wi-Fi off): Menu > Schedule; set periods.
Enable geofencing for auto-adjust.

3. Temporary Override: Plus/Minus for 2-hour hold min.
4. Permanent Hold: Turn Schedule Off.
5. Disable Programming: Schedule Off in app or on unit.

Advanced Features

1. Remote Control: Via Sensi app with Wi-Fi.
2. Energy Saving: Usage reports, geofencing, alerts.
3. Voice Control: Compatible with Alexa, Google Assistant, HomeKit.
4. HVAC Monitoring: System alerts via app.
5. Circulating Fan: Menu > Advanced Setup > Fan Mode Options; 10%-100% runtime.
6. Humidification/Dehumidification: Menu > Advanced Setup; set points (5%-50% hum, 40%-95% dehum).
7. Display Options: Menu > Display Options for time/humidity/F/C, Sleep Mode.
8. Remote Sensors: Pair via Menu; average temps.
9. Keypad Lock: Enable via app.
10. Temperature Limits: Set via app (45°-99°F default).

Troubleshooting

Blank/Flashing Display: Check C-wire; ensure 20-30VAC between RH/RC and C; reset breakers.
No Heat/Cool: Verify mode, wiring; check HVAC/breaker; configure in Menu > Advanced Setup.
Wi-Fi Issues: Ensure 2.4GHz, update app, reboot; check permissions.
Setpoint Issues: Check Schedule, automations, Geofencing, Limits.
Factory Reset: Menu > About Thermostat > Reset (clears settings except HVAC).

Installation Instructions

Warning: Turn off power at breaker before starting. DIY or professional installation. Requires C-wire for power.

Remove Old Thermostat

Switch off power to HVAC at breaker.
Remove old cover (screwdriver or latch).
Photograph wiring for reference.
Discard jumper wires (Sensi has built-in).
Identify/label wires in app; select system type.
Disconnect wires, remove base; secure wires.

Installing New Thermostat

Mount Base: Level and mark holes, secure with screws/anchors.
Connect labeled wires to terminals (push in securely).
Push excess wire into wall.
Attach touchscreen cover to base.
Turn on power; screen activates.
Menu > Wi-Fi to initiate connection; follow app for setup, naming, location registration (QR code or PIN).

Battery Location

No user-replaceable batteries; powered by 24V C-wire.
Back glow switch on base for installation lighting (turn off after).

Wiring and Configuration

Match wire labels to terminals. Clip RH/RC jumper if separate transformers. Access config: Menu > Advanced Setup.

System Type	Key Connections
Conventional Single Stage (AC1/GA1/EL1)	R/RH/RC to R, C to C, G to G, Y to Y, W to W/E
Heat Pump Single Stage (HP1)	R to R, C to C, G to G, Y to Y, O/B to O/B, W to W/E
Two-Stage Conventional (AC2/GA2/EL2)	R to R, C to C, G to G, Y to Y, Y2 to Y2, W to W/E, W2 to W2
Dual Fuel Heat Pump (HP2)	R to R, C to C, Y to Y, Y2 to Y2, O/B to O/B, W to W/E, W2 to W2
Humidifier/Dehumidifier	ACC+/ACC- or Y2/W2 for accessories

Caution: Ensure secure connections. Configure system type in app or Menu during setup. C-wire required.

Terminal Definitions:

RH/RC: Power for heating/cooling, 24V
C: Common wire, 24V
G: Indoor blower (fan)
Y: First stage cooling/heat pump
Y2: Second stage cooling or humidifier
W/E: First stage heat or aux/emergency
W2: Second stage heat or dehumidifier
O/B: Reversing valve for heat pump
ACC+/ACC-: Accessory for humidifier/dehumidifier

Menu Configurations Reference:

Menu Item	Default	Options
Outdoor Equipment	-	AC1/AC2/HP1/HP2/None
Indoor Equipment	-	GA1/GA2/EL1/EL2/Fan
Reversing Valve	None	O/B/6/None
Humidifier	Off	Yes/No; 5%-50%
Dehumidifier	Off	Yes/No; 40%-95%
Circulating Fan	Off	10%-100% (5%)
Wi-Fi	-	Connect/Off
Sleep Mode	Off	On/Off