American Standard Thermostat ACONT402AN32DA Manual

The American Standard ACONT402AN32DA is a programmable thermostat designed for residential HVAC systems, offering precise temperature control, energy-saving scheduling, and compatibility with various heating and cooling equipment. It features a backlit digital display, intuitive menu navigation, 7-day programming flexibility, system status indicators, and built-in temperature hold functions. Below are key sections covering features, installation, programming, operation, maintenance, 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 Schedule 8. Energy-Saving Features 9. Care & Maintenance 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Digital display with backlight, Menu/Select buttons, Up/Down temperature adjustment, System Mode selector (Heat/Cool/Auto/Off), Fan control (Auto/On), Hold button, Program schedule access.

Feature	Description
Digital Display	Backlit LCD showing temperature, time, and system status
7-Day Programmable	Set different schedules for each day of the week
Temperature Hold	Override schedule temporarily or permanently
System Mode	Select Heat, Cool, Auto, or Off
Fan Control	Set fan to Auto or continuous On
Filter Change Alert	Reminder light when filter needs replacement
Keypad Lock	Prevents unauthorized changes to settings
Battery Backup	Maintains program during power outages
Compatibility	Works with most 24VAC heating/cooling systems
Energy Star Certified	Meets energy efficiency guidelines

Installation

Turn off power to HVAC system at circuit breaker before installation.

Remove old thermostat: Label wires, disconnect from terminals.
Mount new baseplate: Level and secure to wall using provided screws.
Connect wires: Match labeled wires to corresponding terminals (R, W, Y, G, C, etc.).
Attach thermostat: Align and snap onto baseplate.
Restore power and configure settings.

WARNING! Electrical shock hazard. Ensure power is OFF before handling wires. If unsure, consult a qualified HVAC technician.

First-Time Setup

After installation and power restoration, follow initial setup prompts.

Set time and day: Use MENU and arrow buttons to enter current time and day.
Configure system type: Select appropriate heating/cooling equipment (conventional, heat pump, etc.).
Set temperature limits: Establish minimum and maximum temperature boundaries.
Program schedule: Use default energy-saving program or customize later.
Install batteries: Insert AA batteries for backup power.

CAUTION! Verify wire connections are secure before restoring power.

Specifications

Power Requirements: 24VAC from HVAC system; AA battery backup.
Temperature Range: 40°F to 99°F (4°C to 37°C).
Temperature Resolution: 1°F or 1°C.
Display: Backlit digital LCD.
Programming: 7-day, 4 periods per day.
Compatibility: Most 24VAC heating, cooling, and heat pump systems.
Terminals: R, Rc, Rh, W, Y, G, O/B, C, etc.
Operating Environment: 32°F to 122°F (0°C to 50°C).
Warranty: Limited 5-year warranty from date of purchase.

Controls and Settings

Front panel buttons: MENU, SELECT, UP/DOWN arrows, MODE (Heat/Cool/Auto/Off), FAN (Auto/On), HOLD.

Menu Navigation: Press MENU to access Time/Day, Schedule, System Settings, Temperature Limits, Filter Reset, Keypad Lock, and Factory Reset.

Temperature Adjustment: Use UP/DOWN arrows to set desired temperature. System Mode: Select Heat, Cool, Auto (automatically switches between heat and cool), or Off. Fan Control: Auto (runs with HVAC cycles) or On (continuous circulation). Hold Function: Temporarily override programmed schedule. Filter Alert: Reset after changing air filter.

Connecting to HVAC System

Ensure correct wire labeling and terminal connections.

Turn off HVAC system power at circuit breaker.
Match wires: Common (C), Power (R/Rc/Rh), Heat (W), Cool (Y), Fan (G), Heat Pump (O/B), etc.
Insert stripped wire ends into corresponding terminal slots on baseplate.
Secure wires and mount thermostat.
Restore power and test system operation.

Tip: Take a photo of old thermostat wiring before disconnecting for reference.

Programming Schedule

Create custom temperature schedules for energy savings.

Press MENU, select SCHEDULE.
Choose day or day type (Weekday, Weekend, Custom).
Set up to 4 periods per day: Wake, Leave, Return, Sleep.
For each period, set time and desired temperature.
Repeat for all days as needed.
Press DONE to save and exit.

Energy-Saving Tip: Set lower temperatures in winter (when away/asleep) and higher temperatures in summer for maximum efficiency.

Energy-Saving Features

Programmable schedules reduce energy use. Adaptive Recovery: Learns system cycle time to reach set temperature by scheduled time. Temperature Hold: Temporary override returns to schedule automatically. Filter Alert: Ensures efficient airflow. Auto Mode: Automatically switches between heating and cooling based on ambient temperature.

Care & Maintenance

Clean exterior with soft, dry cloth. Do not use liquids or cleaners. Replace batteries annually or when low battery icon appears. Reset filter alert after each filter change. Ensure thermostat is level and away from heat sources or drafts.

CAUTION! Do not spray cleaning agents directly on thermostat. Avoid placement in direct sunlight or near vents.

Regulatory Information

FCC Part 15 Compliance: Class B digital device; may not cause harmful interference. Energy Star Certified: Meets U.S. EPA energy efficiency standards. Copyright © American Standard Heating & Air Conditioning. For support, visit www.americanstandardair.com or contact customer service at 1-800-428-4328.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Blank display	Power loss or dead batteries	Check circuit breaker; replace AA batteries.
System not turning on	Incorrect wiring or mode setting	Verify wire connections; set MODE to Heat or Cool.
Incorrect temperature reading	Location or calibration	Relocate away from heat sources; check calibration in menu.
Schedule not following program	Hold function active	Press HOLD to return to scheduled program.
Short cycling	Temperature differential too small	Adjust cycle rate or temperature differential in installer settings.

Reset: Menu > Settings > Factory Reset to restore defaults (erases all programming).

Service: 1-800-428-4328; www.americanstandardair.com