Nest T200577 Thermostat Operation Manual

The Nest T200577 (Nest Thermostat E) is a smart, Wi-Fi enabled thermostat designed for simple, affordable home temperature control. It supports most 24V heating and cooling systems and integrates with the Google Home app for scheduling and remote access. 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: Smart Wi-Fi thermostat for heating and cooling
Compatibility:
- Most 24V systems: gas, electric, oil, heat pump
- Heating: 1-2 stages (W1, W2)
- Cooling: 1 stage (Y1)
- Heat pump with aux (O/B, AUX)
- Fan control (G)
- No support for 2-stage cooling or line-voltage
Power Source:
- 2 x AAA alkaline batteries
- 24V AC via C-wire or Nest Power Connector
- Battery life: Up to 1 year
Electrical Rating:
- 20-30 VAC input
- Relay ratings: 24V AC, 1A max per terminal
Temperature Range: Setpoint: 40°F to 90°F (4° to 32°C); Operating: 32°F to 104°F (0° to 40°C)
Operating Conditions:
- Humidity: 20% to 90% RH non-condensing
- Wi-Fi: 802.11b/g/n (2.4 GHz only)
Dimensions: 3.3" W x 3.3" H x 1.1" D; Weight: 5.1 oz
Features:
- Touch bar for adjustments
- Google Home app scheduling
- Energy-saving Eco mode
- Safety temperature alerts
- Remote control
Thermostat Configuration Options:
- Single-stage cool, up to 2-stage heat
- App-based control
- Google Assistant integration

Operation Instructions

Initial Setup

1. Install: Follow Section 3; power on after wiring.
2. Download App: Install Google Home app, add device.
3. Configure System:

Scan QR code, connect Wi-Fi.
Select system type (heat pump, etc.).
Run test to verify operation.

Setting the Clock and Day

1. Syncs automatically via Wi-Fi.
2. Manual: In app, Settings > Display > Clock.
3. Set format (12/24-hour), time zone.
4. Day auto-set from location.

Operating in Non-Programmable Mode

1. Select Mode: Press thermostat, swipe to Heat, Cool, Off, Eco.
2. Adjust Temperature: Press + or - buttons or swipe.
3. Fan Control: Auto or On via app.
4. Manual Override: Adjust for temporary hold.

Operating in Programmable Mode

1. Factory Schedule: Default in app.
2. Custom Schedule:

App: Thermostat > Schedule.
Set times/temps for periods.
Save and activate.

3. Temporary Override: Press +/- on unit.
4. Permanent Hold: Pause schedule in app.
5. Disable Programming: Set to manual.

Advanced Features

1. Eco Mode: Auto-adjusts when away.
2. Remote Access: Control via app.
3. Voice Control: "Hey Google, thermostat temperature."
4. Alerts: Low battery, extreme temps.

Troubleshooting

Blank Screen: Replace batteries, check wiring.
No Heat/Cool: Verify mode, app test.
Wi-Fi Problems: Restart, check signal.

Installation Instructions

Warning: Turn off power. Use pro for unsure installs.

Remove Old Thermostat

Power off.
Label wires, disconnect.
Remove base.

Installing New Thermostat

Mount base.
Connect wires.
Snap unit on.
Power on, setup.

Battery Location

2 x AAA in back.
Replace annually.

Wiring and Configuration

Strip 1/4", no polarity.

Terminal	Description
R	Power
W1	Heat 1
W2	Heat 2
Y1	Cool
G	Fan
O/B	Changeover
AUX	Aux heat
C	Common

Caution: App configures system.