Nest A0124 Smoke Alarm Operation Manual

The Nest A0124 (Nest Protect) is a smart smoke and carbon monoxide alarm that detects smoke and CO with multiple sensors, providing voice alerts, wireless interconnect, and app notifications for enhanced safety. It supports 120V wired installation with battery backup and integrates with the Nest app for remote monitoring. 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 smoke and carbon monoxide alarm with wireless interconnect
Compatibility:
- 120V wired with 3 AA battery backup
- Wireless interconnect with other Nest Protects (up to 50 ft range)
- Wi-Fi for app notifications and updates
- Not compatible with other brands' alarms
Power Source:
- 120V AC ~ 60Hz; backup: 3 AA Energizer Ultimate Lithium batteries
- Consumption: Low power, self-charging
Electrical Rating:
- Meets UL 217 (smoke) and UL 2034 (CO) standards
- Photoelectric smoke sensor; electrochemical CO sensor
Temperature Range: Operating: 40°F to 100°F (4°C to 38°C); Humidity: Up to 85% RH
Operating Conditions:
- Indoor residential use only
- Lifetime: 7 years
Dimensions: 5.3" diameter x 1.6" depth; Weight: 13.9 oz (with batteries)
Features:
- Voice alerts with room names
- Pathlight night illumination
- Heads-Up early warnings
- App integration for remote monitoring
- Self-testing and expiration alerts
Alarm Configuration Options:
- Single or multi-unit wireless network
- Custom room naming via app

Operation Instructions

Initial Setup

1. Download App: Install Nest app on iOS/Android, create free Nest account.
2. Power On: After installation, unit powers up automatically.
3. Configure System:

Scan QR code in app, connect to Wi-Fi.
Name rooms and link multiple units for wireless interconnect.
Run initial test by pressing Nest button.

Setting the Clock and Day

1. Time syncs automatically via Wi-Fi connection.
2. For manual adjustment: Use app Settings > Device > Time Zone.
3. Set 12/24-hour format and daylight savings if needed.
4. Alerts include time-based notifications for maintenance.

Operating in Non-Programmable Mode

1. Select Mode: Continuous monitoring; no manual modes.
2. Adjust Sensitivity: Not user-adjustable; self-calibrates.
3. Hush Alerts: Press Nest button to silence non-emergency Heads-Up.
4. Manual Test: Press button twice to run test; all units respond.

Operating in Programmable Mode

1. Factory Schedule: Continuous detection with auto self-tests.
2. Custom Alerts:

App: Set up notifications for smoke/CO, low battery, expiration.
Schedule maintenance reminders.
Enable Pathlight for night use.

3. Temporary Override: Hush via button or app.
4. Permanent Hold: Disable via app for testing.
5. Disable Programming: Turn off Wi-Fi features in app.

Advanced Features

1. Heads-Up Alerts: Early warnings for rising smoke/CO via app and voice.
2. Pathlight: Gentle night light; customizable in app.
3. Wireless Interconnect: All units announce alert location.
4. Steam/Smoke Differentiation: Reduces false alarms from showers.
5. App Monitoring: Remote status, history, and emergency contacts.

Troubleshooting

No Sound/Display: Check power, batteries; press button for status.
Yellow Light: Indicates issue (low battery, Wi-Fi, sensor); press for details.
False Alarms: Clean unit, relocate away from kitchen/bathroom.
No Interconnect: Ensure all units added to app; test range.

Installation Instructions

Warning: Turn off power at breaker. Professional installation recommended; follow NFPA 72 and local codes.

Remove Old Thermostat

Turn off power at breaker.
Twist off old alarm; disconnect wires.
Unscrew base; cap unused interconnect wire.

Installing New Thermostat

Attach 120V connector: Cap whites, blacks, interconnect with wire nuts.
Screw backplate to electrical box.
Plug connector into unit.
Tuck wires, twist unit onto backplate.
Restore power, run app setup.

Battery Location

3 AA Energizer Ultimate Lithium in rear compartment.
Replace when low (yellow light, voice alert).

Wiring and Configuration

120V AC wiring; no polarity for interconnect.

Wire	Description
Black	Hot (120V)
White	Neutral
Bare Copper	Ground
Red/Orange/Yellow	Interconnect (cap if unused)

Caution: Configure rooms and test in app.