American Standard Thermostat One T064.740 Manual

The American Standard Thermostat One T064.740 is a programmable thermostat designed for residential HVAC systems, offering precise temperature control, energy-saving programming, and compatibility with most heating and cooling systems. It features a backlit digital display, intuitive menu navigation, 7-day programming flexibility, vacation hold, filter change reminder, and system status indicators. 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 Schedule 8. Energy-Saving Features 9. Care & Maintenance 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Digital display with backlight, Menu button, Up/Down arrows, Hold button, Fan button, System button, Mode button.

Feature	Description
Digital display	Backlit LCD showing temperature, time, and system status
7-day programming	Allows different schedules for each day of the week
Vacation hold	Set extended away periods for energy savings
Filter change reminder	Alerts when HVAC filter needs replacement
Compatibility	Works with most 24VAC heating and cooling systems
Temperature range	40°F to 99°F (4°C to 37°C)
Battery backup	Uses 2 AA batteries to retain settings during power loss
System status icons	Indicates heating, cooling, fan operation
Keypad lock	Prevents unauthorized changes to settings
Energy usage reports	Displays runtime data for heating and cooling

Installation

Turn off power to HVAC system before installation. Remove old thermostat and label wires.

Mount backplate: Use included screws to secure backplate to wall.
Connect wires: Match labeled wires to corresponding terminals (R, W, Y, G, C, etc.).
Attach thermostat: Align and snap onto backplate.
Install batteries: Insert 2 AA batteries for backup power.
Restore power to HVAC system.

WARNING! Electrical shock hazard. Always turn off power at circuit breaker before installation.

First-Time Setup

After installation, configure basic settings.

Set time and day: Press MENU, navigate to TIME/DAY settings.
Select temperature format: Choose Fahrenheit or Celsius.
Configure system type: Set for conventional or heat pump system.
Set temperature limits: Establish minimum and maximum temperature boundaries.
Test system operation: Verify heating and cooling functions work properly.

CAUTION! Ensure proper wire connections to prevent system damage.

Specifications

Power Requirements: 24VAC from HVAC system; 2 AA battery backup.
Temperature Control: 40°F to 99°F (4°C to 37°C) in 1° increments.
Display: Backlit LCD with adjustable contrast.
Programming: 4 periods per day, 7-day flexible scheduling.
Compatibility: Conventional and heat pump systems (1H/1C, 2H/2C).
Terminals: R, Rc, Rh, W, Y, G, O/B, C, Aux/E.
Dimensions: 3.5" H × 4.5" W × 0.75" D (89mm × 114mm × 19mm).
Operating Temperature: 32°F to 122°F (0°C to 50°C).
Warranty: 5-year limited warranty.

Controls and Settings

Access menus via MENU button. Navigation with Up/Down arrows.

Buttons: MENU (access settings), UP/DOWN (adjust temperature/navigate), HOLD (temporary temperature override), FAN (On/Auto), SYSTEM (Heat/Cool/Off/Auto), MODE (program/view schedule).

Settings Menu: TIME/DAY (set clock), TEMP FORMAT (F/C), SYSTEM TYPE (conventional/heat pump), TEMP LIMITS (min/max), FILTER TIMER (set reminder interval), KEYPAD LOCK (enable/disable), FACTORY RESET (restore defaults). Programming: Set 4 time periods (Wake, Leave, Return, Sleep) with different temperatures for each day.

Connecting to HVAC System

Match thermostat wires to HVAC system terminals.

Turn off power at circuit breaker.
Label existing thermostat wires before disconnecting.
Connect wires to corresponding terminals on backplate.
Common wire (C) required for continuous power; battery backup works without C wire.
For heat pump systems: Connect O/B wire for reversing valve.

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

Programming Schedule

Create custom temperature schedules for energy savings.

Press MODE button to enter programming mode.
Select day: Choose specific day or copy to other days.
Set periods: Program up to 4 time periods per day (Wake, Leave, Return, Sleep).
Set temperatures: Adjust heat and cool setpoints for each period.
Copy schedule: Apply same schedule to multiple days.
Vacation programming: Set extended away periods with energy-saving temperatures.
Temporary override: Use HOLD button for manual temperature adjustment.
Cancel hold: Press HOLD again to resume scheduled program.

WARNING! Do not set extreme temperatures that could damage system or pipes.

Energy-Saving Features

Adaptive Recovery: Learns system recovery time to reach setpoint by scheduled time. Filter Change Reminder: Program interval (30-365 days) for maintenance alert. Vacation Hold: Set extended away periods with energy-saving temperatures. Energy Reports: View heating and cooling runtime data.

Care & Maintenance

Clean with soft, dry cloth only. Do not use liquids or cleaners. Replace batteries annually or when low battery icon appears. Reset filter timer after changing HVAC filter.

CAUTION! Do not spray cleaning products directly on thermostat. Keep away from direct sunlight and heat sources.

Regulatory Information

FCC Part 15: Class B digital device; complies with interference limits for residential use. UL Listed: Meets safety standards. Copyright © 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	Settings/wiring	Check SYSTEM setting (Heat/Cool); verify wire connections; check furnace filter.
Incorrect temperature	Location/calibration	Relocate away from heat sources; check temperature calibration in menu.
Short cycling	Settings	Adjust temperature differential (cycle rate) in installer settings.
Fan runs continuously	FAN setting	Change FAN setting from ON to AUTO; check G wire connection.
Heat pump not reversing	O/B setting	Configure O/B setting for heating/cooling mode in installer settings.

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

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