American Standard Thermostat Trane AYVSTAT100A Manual

The American Standard Trane AYVSTAT100A is a programmable thermostat designed for use with compatible heating and cooling systems. It features a digital display, programmable schedules for energy savings, temperature hold functions, system mode selection (Heat/Cool/Auto/Off), fan control (Auto/On), and battery backup. Below are key sections for safety, features, installation, programming, operation, and troubleshooting.

1. Features at a Glance 2. Installation & Wiring 3. First-Time Setup 4. Specifications 5. Controls and Settings 6. Programming Schedule 7. Operating Modes 8. Battery & Power 9. Care & Maintenance 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Digital LCD display, Menu/Select buttons, Up/Down temperature adjustment, System Mode selector, Fan control, Program/Schedule buttons, Battery compartment.

Feature	Description
Digital Display	Shows current temperature, set point, time, and system status
Programmable Schedule	7-day programming with 4 periods per day (Wake, Leave, Return, Sleep)
System Mode	Heat, Cool, Auto, Off selection
Fan Control	Auto (runs with system) or On (continuous)
Temperature Hold	Temporary or Permanent hold to override schedule
Battery Backup	Uses 2 AA batteries for memory during power loss
Filter Change Reminder	Programmable alert for HVAC filter maintenance
Keypad Lock	Prevents unauthorized changes to settings
Backlight	Illuminates display when buttons are pressed
Compatibility	Works with most 24VAC heating/cooling systems

Installation & Wiring

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

Remove old thermostat: Label wires before disconnecting.
Mount new baseplate: Level and secure to wall using provided screws.
Connect wires: Match labeled terminals (R, C, Y, G, W, etc.) to corresponding wires.
Attach thermostat: Align and snap onto baseplate.
Install batteries: Insert 2 AA batteries into compartment.
Restore power: Turn circuit breaker back on.

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 restore, configure initial settings.

Set time and day: Press MENU, navigate to CLOCK SETTINGS.
Select temperature format: Fahrenheit or Celsius.
Configure system type: For conventional or heat pump systems.
Set program schedule: Use default energy-saving program or customize.
Test operation: Run system in Heat and Cool modes to verify.

CAUTION! Allow system to complete start-up cycle before adjusting settings.

Specifications

Power Requirements: 24VAC from HVAC system; 2 AA battery backup.
Temperature Range: 40°F to 99°F (4°C to 37°C).
Display: Digital LCD with backlight.
Programmable Periods: 4 per day (Wake, Leave, Return, Sleep).
Compatibility: Single-stage conventional and heat pump systems.
Terminals: R, C, Y, G, W, O/B, etc., for standard HVAC wiring.
Operating Environment: 32°F to 122°F (0°C to 50°C); indoor use only.
Warranty: 1-year limited warranty from date of purchase.

Controls and Settings

Access menus via MENU button. Navigate with Up/Down arrows, select with OK/SELECT.

Front Panel: Temperature display, Mode (Heat/Cool/Auto/Off), Fan (Auto/On), Up/Down arrows, Hold, Menu, Back/Exit.

Settings Menu: Clock/Time, Schedule Programming, Temperature Limits, System Configuration (Conventional/Heat Pump), Filter Change Reminder Interval, Keypad Lock, Factory Reset.

Programming Schedule

Create custom temperature schedules for energy savings.

Press MENU, select PROGRAM SCHEDULE.
Select day (Monday-Sunday, Weekday/Weekend, or All 7 days).
Set temperatures for 4 periods: Wake (e.g., 6 AM, 70°F), Leave (e.g., 8 AM, 62°F), Return (e.g., 6 PM, 68°F), Sleep (e.g., 10 PM, 65°F).
Save and exit. Thermostat will follow schedule automatically.

Tip: Use "Temporary Hold" for short overrides; "Permanent Hold" disables schedule until manually resumed.

Operating Modes

Select mode based on season and preference.

Heat Mode: System provides heating only when temperature falls below set point.
Cool Mode: System provides cooling only when temperature rises above set point.
Auto Mode: Automatically switches between Heat and Cool to maintain set point range.
Off Mode: System does not run; fan can still be set to On for circulation.
Fan Control: Auto (runs with heating/cooling cycles) or On (continuous operation).

WARNING! Do not switch between Heat and Cool modes rapidly; allow system to stabilize.

Battery & Power

Battery backup maintains settings during power outages. Low battery icon appears when replacement is needed.

Replace batteries: Slide off thermostat from baseplate, replace both AA batteries, reattach. Check/replace batteries annually.

Care & Maintenance

Clean with soft, dry cloth only. Do not use liquids or abrasive cleaners.

CAUTION! Do not spray cleaners directly on thermostat. Ensure unit is dry before reattaching to power.

Regulatory Information

FCC Part 15: Class B digital device; complies with interference limits for residential use. Copyright © American Standard Heating & Air Conditioning. For support, visit www.americanstandard.com or contact 1-800-448-9826.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Blank display	Power loss or dead batteries	Check circuit breaker; replace batteries.
System not turning on	Incorrect wiring or mode setting	Verify wiring connections; ensure mode is set to Heat or Cool.
Temperature inaccurate	Location or calibration	Relocate away from heat sources; check calibration in menu.
Schedule not following	Hold active or programming error	Cancel Hold; review and reprogram schedule.
Fan runs continuously	Fan set to "On" mode	Change fan setting to "Auto".

Reset: Menu > Settings > Factory Reset to restore defaults.

Service: 1-800-448-9826; www.americanstandard.com