American Standard Thermostat ACONT202AS11MA Manual

The American Standard ACONT202AS11MA is a programmable thermostat designed for residential HVAC systems, offering precise temperature control, energy-saving scheduling, and compatibility with single-stage heating and cooling equipment. It features a backlit digital display, intuitive menu navigation, hold/vacation functions, system status indicators, and installer configuration options. Below are key sections for safety, features, installation, programming, 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 Schedule 8. Energy-Saving Features 9. Care & Cleaning 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Digital display with backlight, Menu/Select buttons, Up/Down temperature adjustment, System switch (Heat/Cool/Off), Fan switch (Auto/On), Hold/Vacation buttons.

Feature	Description
Digital Display	Backlit LCD showing temperature, time, and system status
Programmable Schedule	7-day programming with 4 periods per day
Temperature Hold	Temporary override of programmed schedule
Vacation Mode	Extended energy-saving temperature setting
System Switch	Selects Heat, Cool, or Off mode
Fan Switch	Controls fan operation (Auto or Continuous On)
Filter Change Alert	Reminder light based on runtime hours
Battery Backup	Maintains program during power outages (2 AA batteries)
Installation Lock	Prevents unauthorized changes to installer settings
Compatibility	24VAC systems; single-stage heat/cool

Installation

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

Mount backplate: Level and secure to wall using provided screws.
Connect wires: Match labeled terminals (R, W, Y, G, C) to HVAC system wires.
Attach thermostat: Snap onto backplate until it clicks into place.
Install batteries: Insert 2 AA batteries for backup power.
Restore power: Turn circuit breaker back on.

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

First-Time Setup

After installation, configure basic settings.

Set time and day: Press MENU, navigate to TIME/DAY, set current time and day of week.
Select temperature format: Choose Fahrenheit or Celsius in SETTINGS menu.
Configure heating/cooling limits: Set minimum and maximum temperature boundaries.
Program schedule: Follow programming steps in section 8 or use default energy-saving schedule.

CAUTION! Ensure thermostat is level for accurate temperature readings. Keep away from heat sources and drafts.

Specifications

Power: 24VAC from HVAC system; 2 AA battery backup.
Temperature Range: 40°F to 99°F (4°C to 37°C).
Display: Backlit LCD with adjustable contrast.
Programming: 7-day, 4 periods per day (Wake, Leave, Return, Sleep).
Compatibility: Single-stage conventional and heat pump systems (requires C wire for full functionality).
Accuracy: ±1°F (±0.5°C).
Installation: Standard 2" x 3" wall plate; works with most wall coverings.
Operating Environment: 32°F to 122°F (0°C to 50°C); 0% to 90% relative humidity (non-condensing).

Controls and Settings

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

Menu Navigation: Press MENU to access TIME/DAY, SCHEDULE, SETTINGS, INSTALLER CONFIG. Use arrows to navigate, SELECT to choose.

Temperature Adjustment: Press UP/DOWN arrows to set desired temperature. System Status: Icons indicate heating, cooling, fan operation. Filter Alert: Wrench icon lights when filter change is due (based on configurable runtime).

Connecting to HVAC System

Terminals: R (24VAC power), W (Heat), Y (Cool), G (Fan), C (Common).

Turn off HVAC system power at circuit breaker.
Label existing thermostat wires before disconnecting.
Match wires to terminals on thermostat backplate (use included wire labels).
For heat pump systems: Additional terminals may be required (O/B, Aux/E). Consult HVAC professional.

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

Programming Schedule

Default schedule provides energy savings while maintaining comfort.

Press MENU, select SCHEDULE.
Select day or day group (Weekday, Weekend, Monday-Sunday).
Set temperatures for 4 periods: Wake (6:00 AM), Leave (8:00 AM), Return (6:00 PM), Sleep (10:00 PM).
Use UP/DOWN arrows to adjust temperature for each period.
Press SELECT to save and move to next period/day.
Press MENU to exit programming.

Note: Press HOLD to temporarily override schedule. Press HOLD again to resume program.

Energy-Saving Features

Vacation Mode: Press VACATION, set temperature for extended away periods (40°F-99°F). Adaptive Recovery: Learns system cycle time to reach set temperature by scheduled time. Temperature Limits: Prevents extreme settings in installer configuration.

Care & Cleaning

Turn off power before cleaning. Use soft, dry cloth to wipe display and casing. Do not use liquids or abrasive cleaners.

CAUTION! Do not spray cleaning solutions directly on thermostat. Moisture can damage electronics.

Regulatory Information

FCC Part 15: Class B digital device; complies with interference limits for residential use. UL Listed. Copyright © American Standard Heating & Air Conditioning. For support, visit www.americanstandard.com or contact 1-800-228-2962.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Blank display	Power loss/batteries	Check circuit breaker; replace AA batteries; ensure C wire connected.
System not turning on	Settings/wiring	Verify SYSTEM set to Heat or Cool; check thermostat wiring connections.
Incorrect temperature	Location/calibration	Relocate away from heat sources/drafts; check temperature calibration in installer settings.
Schedule not following	Hold active/programming	Cancel HOLD function; verify schedule times and temperatures are programmed.
Short cycling	Settings/wiring	Adjust cycle rate in installer settings; check for proper wiring and system compatibility.

Reset: Press and hold MENU and DOWN arrow for 5 seconds to restore factory defaults (except installer settings).

Service: 1-800-228-2962; www.americanstandard.com