American Standard Thermostat Moments T506.740 Manual

The American Standard Moments T506.740 is a programmable thermostat designed for precise temperature control of heating and cooling systems. It features a backlit digital display, 7-day programming flexibility, automatic changeover between heating and cooling modes, filter change reminder, system status indicators, and compatibility with most 24V HVAC systems. 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. Wiring Configuration 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, Program buttons, System switch, Fan switch, Temperature adjustment buttons, Battery compartment.

Feature	Description
Backlit Display	Easy-to-read screen with adjustable backlight
7-Day Programming	Set different schedules for each day of the week
Automatic Changeover	Automatically switches between heating and cooling
Filter Change Reminder	Alerts when HVAC filter needs replacement
Hold/Vacation Mode	Temporarily override schedule or set vacation temperatures
System Status Indicators	LEDs for Heating, Cooling, and Fan operation
Battery Backup	Maintains programming during power outages
Temperature Range	40°F to 99°F (4°C to 37°C)
Compatibility	Works with most 24V single-stage HVAC systems
Mounting Plate	Includes wall plate for easy installation

Installation

Turn off power to HVAC system before installation. Remove old thermostat if present.

Mount wall plate: Level and secure to wall using provided screws.
Connect wires: Match wire labels (R, W, Y, G, C, etc.) to terminal screws on plate.
Attach thermostat: Align and snap onto mounted plate.
Install batteries: Insert 2 AA alkaline 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 mode: Switch SYSTEM to HEAT, COOL, or AUTO.
Set fan: Switch FAN to AUTO or ON.
Set time and day: Press SET CLOCK button and adjust.
Set temperature: Use UP/DOWN arrows to set desired temperature.
Program schedule: Follow programming steps to set 4 periods per day.

CAUTION! Ensure wires are securely connected to prevent system malfunction.

Specifications

Power Requirements: 24V AC from HVAC system; 2 AA battery backup.
Display: Digital LCD with backlight.
Temperature Control: 1°F (0.5°C) increments.
Programming: 7-day, 4 periods per day (Wake, Leave, Return, Sleep).
Compatibility: Single-stage heat/cool systems (gas, oil, electric, heat pump).
Operating Temperature: 32°F to 122°F (0°C to 50°C).
Relative Humidity: 0% to 90% non-condensing.
Wires: Supports up to 6 wires (R, W, Y, G, C, O/B).
Dimensions: 5.5" x 3.5" x 1" (140mm x 89mm x 25mm).

Controls and Settings

Front Panel: SYSTEM switch (HEAT/COOL/OFF/AUTO), FAN switch (AUTO/ON), Temperature buttons, SET CLOCK, PROGRAM, HOLD, FILTER RESET.

Display Indicators: HEAT/COOL/FAN LEDs, Battery icon, Filter reminder, Hold icon.

Programming: Access via PROGRAM button to set Wake, Leave, Return, Sleep times and temperatures for each day. Settings: Temperature limits (min/max), Fahrenheit/Celsius, backlight duration, filter change interval. System Test: Initiates system test sequence to verify HVAC operation.

Wiring Configuration

Standard terminal designations: R (24V power), W (Heat), Y (Cool), G (Fan), C (Common), O/B (Heat pump reversing valve).

Turn off HVAC power at circuit breaker.
Label wires from old thermostat before disconnecting.
Connect wires to matching terminals on new wall plate.
Ensure wires are stripped 1/4" and inserted fully.

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

Programming Schedule

Create custom temperature schedules for energy savings.

Press PROGRAM button to enter programming mode.
Select day: MON, TUE, WED, THU, FRI, SAT, SUN, or ALL.
Set periods: Adjust WAKE, LEAVE, RETURN, SLEEP times and temperatures.
Copy schedule: Copy one day's schedule to other days.
Exit programming: Press DONE to save and exit.
Override temporarily: Press HOLD to maintain current temperature until next scheduled period.
Vacation mode: Press HOLD for 3 seconds to set extended away period.

WARNING! Do not set extreme temperature differentials (more than 5°F) between periods.

Energy Saving Features

Programmable schedules reduce energy use when away. Adaptive Recovery: Learns system cycle time to reach set temperature by scheduled time. Temperature Limits: Prevents extreme settings. Filter Reminder: Promotes system efficiency.

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 reminder after filter change by pressing FILTER RESET.

CAUTION! Do not spray cleaning agents directly on thermostat.

Regulatory Information

FCC Part 15: Class B digital device; complies with interference limits. UL Listed: Meets safety standards. Copyright © American Standard Heating & Air Conditioning. For support, visit www.americanstandardair.com or contact 1-800-428-4328.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Blank display	No power/bad batteries	Check circuit breaker; replace batteries; verify wiring.
System not turning on	Incorrect mode/wiring	Set SYSTEM to HEAT or COOL; check W/Y wire connections.
Incorrect temperature	Location/calibration	Relocate away from heat sources; check calibration in settings.
Fan runs continuously	FAN switch setting	Set FAN switch to AUTO instead of ON.
Schedule not following	Hold mode active	Press HOLD to cancel temporary override.

Reset: Remove batteries and disconnect from HVAC for 30 seconds to reset.

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