American Standard Thermostat AZON1050AC52ZAA Manual

The American Standard Thermostat AZON1050AC52ZAA is a programmable digital thermostat designed for residential HVAC systems, offering precise temperature control, energy-saving scheduling, and compatibility with various heating and cooling systems. It features a backlit LCD display, intuitive menu navigation, programmable schedules (7-day, 5+2-day, or non-programmable modes), system status indicators, filter change reminders, and support for single-stage and multi-stage systems. Below are key sections for safety, features, installation, setup, operation, and troubleshooting.

1. Features at a Glance 2. Installation 3. First-Time Setup 4. Specifications 5. Controls and Settings 6. Connecting to HVAC System 7. Programming Schedules 8. Energy-Saving Features 9. Care & Maintenance 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Backlit LCD display, Menu/Select button, Up/Down arrows, System switch (Heat/Cool/Off/Auto), Fan switch (On/Auto), Hold button, Program button.

Feature	Description
LCD Display	Shows current temperature, setpoint, time, day, and system status
Programmable Schedules	Up to 4 periods per day (Wake, Leave, Return, Sleep)
System Compatibility	Single-stage and multi-stage heating/cooling systems
Filter Change Reminder	Alerts when filter needs replacement (default 90 days)
Temperature Range	40°F to 99°F (Heat), 50°F to 99°F (Cool)
Power Source	24V AC from HVAC system; battery backup (2 AA alkaline)
Hold Function	Temporarily overrides programmed schedule
Energy-Saving Mode	Adjusts temperature when away to save energy
Backlight	Activates on button press or system operation
Installation Lock	Prevents unauthorized changes to settings

Installation

Turn off power to HVAC system at circuit breaker. Remove old thermostat and label wires.

Mount baseplate: Use included screws and level to ensure proper alignment.
Connect wires: Match labeled wires to terminals (R, C, W, Y, G, etc.) on baseplate.
Attach thermostat: Align with baseplate and press until it clicks into place.
Install batteries: Insert 2 AA alkaline batteries for backup power.
Restore power: Turn on circuit breaker to HVAC system.

WARNING! Electrical shock hazard—ensure power is off before installation. Incorrect wiring may damage system.

First-Time Setup

Power on thermostat; follow on-screen prompts.

Set time and day: Press MENU, navigate to CLOCK, set current time and day.
Select schedule mode: Choose 7-day, 5+2-day (weekday/weekend), or non-programmable.
Configure system type: Set for single-stage or multi-stage heating/cooling.
Set temperature limits: Adjust minimum and maximum temperature ranges.
Enable filter reminder: Set interval (default 90 days) or disable.

CAUTION! Verify system compatibility before configuration to prevent operational issues.

Specifications

Display: Backlit LCD with temperature, time, and status icons.
Temperature Control: 1°F increments; accuracy ±1°F.
Programming: 4 periods per day; 7-day, 5+2-day, or non-programmable modes.
Power: 24V AC from HVAC system; battery backup (2 AA alkaline).
Compatibility: Single-stage and multi-stage heating/cooling systems (gas, electric, heat pump).
Temperature Range: Heating: 40°F to 99°F; Cooling: 50°F to 99°F.
Installation: Standard wall plate; requires C-wire for continuous power (recommended).
Operating Environment: 32°F to 122°F; 0% to 90% relative humidity (non-condensing).

Controls and Settings

Access menu via MENU button. Front Panel: SYSTEM (Heat/Cool/Off/Auto), FAN (On/Auto), HOLD, PROGRAM, Up/Down arrows.

Menu Navigation: Use MENU to access CLOCK, SCHEDULE, SETTINGS, FILTER, INSTALLER OPTIONS.

Clock: Set time, day, daylight saving. Schedule: Program 4 periods per day (Wake, Leave, Return, Sleep). Settings: Temperature limits, display brightness, temperature offset, energy-saving mode. Filter: Set reminder interval (30-365 days). Installer Options: System type, staging configuration, installation lock (default code 0000).

Connecting to HVAC System

Terminals: R (24V power), C (common), W/W1 (heat), Y/Y1 (cool), G (fan), O/B (heat pump reversing valve).

Turn off HVAC power at circuit breaker.
Label existing thermostat wires before disconnecting.
Match wires to terminals on baseplate (refer to wiring diagram).
Secure wires and attach thermostat to baseplate.
Restore power and verify system operation.

Tip: Use a C-wire for continuous power to avoid battery drain and ensure proper operation.

Programming Schedules

Supports 7-day, 5+2-day (weekday/weekend), or non-programmable operation.

Press PROGRAM to enter schedule mode.
Select day or group (Weekday, Weekend, Monday-Sunday).
Set temperatures for each period (Wake, Leave, Return, Sleep).
Use Up/Down arrows to adjust temperature; press MENU to save.
Repeat for all days/groups as needed.
Press HOLD to temporarily override schedule; press again to resume.
Press SYSTEM to switch between Heat, Cool, Auto, or Off modes.

WARNING! Do not set extreme temperatures that may cause system strain or discomfort.

Energy-Saving Features

Energy-Saving Mode: Adjusts temperature by 2°F-5°F when away (configurable). Filter Reminder: Reduces energy consumption by ensuring clean filters. Programmable Schedules: Reduces heating/cooling when not needed.

Care & Maintenance

Clean with soft, dry cloth only. Do not use liquids or abrasive cleaners. Replace batteries annually or when low battery icon appears.

CAUTION! Do not spray cleaning agents directly on thermostat; avoid moisture and extreme temperatures.

Regulatory Information

FCC Part 15: Class B digital device; complies with interference limits for residential use. UL Listed: Meets safety standards for thermostats. Copyright © 2025 American Standard; trademarks of American Standard Brands. For support, visit www.americanstandard.com or contact 1-800-843-0304.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Blank display	Power loss/batteries	Check circuit breaker; replace batteries; verify C-wire connection.
System not turning on	Wiring/system mode	Verify wiring; ensure SYSTEM is set to Heat or Cool; check filter.
Incorrect temperature	Sensor/location	Relocate thermostat away from heat sources; calibrate temperature offset.
Schedule not following	Hold mode/programming	Press HOLD to resume schedule; verify program times and temperatures.
Fan runs continuously	Fan setting	Set FAN to Auto (not On); check G-wire connection.

Reset: Press MENU > Settings > Factory Reset (requires installer code 0000).

Service: 1-800-843-0304; www.americanstandard.com