American Standard Thermostat Town Square T555740 Manual

The American Standard Town Square T555740 is a programmable thermostat designed for residential heating and cooling systems. It features a user-friendly interface, 7-day programming capability, large backlit display, automatic changeover, system status indicators, and compatibility with most 24VAC HVAC systems. 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. Wiring Configuration 7. Programming Schedule 8. System Operation 9. Care & Maintenance 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Large backlit LCD display, intuitive touchpad interface, removable programming module, system status LEDs, and mounting plate with wire terminals.

Feature	Description
7-Day Programming	Set different schedules for each day of the week
Automatic Changeover	Automatically switches between heating and cooling
Large Backlit Display	Easy-to-read temperature and settings
System Status Indicators	LEDs for Heat, Cool, and Fan operation
Hold/Vacation Mode	Temporary or extended temperature overrides
Filter Change Reminder	Programmable alert for maintenance
Battery Backup	Maintains settings during power outages
Touchpad Controls	Simple button interface for all functions
Temperature Limits	User-adjustable minimum and maximum settings
Compatibility	Works with most 24VAC heating/cooling systems

Installation

Turn off power to HVAC system before installation. Remove old thermostat and prepare wiring.

Turn off power: Switch off circuit breaker for HVAC system.
Remove old thermostat: Label wires according to terminal markings.
Mount new baseplate: Level and secure to wall using provided screws.
Connect wires: Insert labeled wires into corresponding terminals (R, W, Y, G, C, etc.).
Attach thermostat: Align and snap onto baseplate.
Restore power: Turn circuit breaker back on.

WARNING! Electrical shock hazard. Always turn off power before installation. If unsure, consult a qualified HVAC technician.

First-Time Setup

After installation and power restoration, configure basic settings.

Set time and day: Press SET CLOCK button and adjust using arrow keys.
Select system type: Choose Heat Pump or Conventional in SETUP menu.
Configure fan operation: Set to AUTO or ON continuous.
Set temperature limits: Adjust minimum heat and maximum cool temperatures.
Program schedule: Follow programming guide for daily temperature settings.

CAUTION! Ensure correct system type selection to prevent equipment damage.

Specifications

Power Requirements: 24VAC from HVAC system; 2 AA batteries for backup.
Temperature Range: 40°F to 99°F (4°C to 37°C).
Display: Backlit LCD with temperature and status icons.
Programming: 4 periods per day, 7 different day schedules.
Accuracy: ±1°F (±0.5°C).
Compatibility: Conventional and heat pump systems (1H/1C).
Terminals: R, Rc, Rh, W, Y, G, O/B, C, AUX/E.
Dimensions: 5.5" x 3.5" x 1" (140mm x 89mm x 25mm).
Operating Temp: 32°F to 122°F (0°C to 50°C).

Controls and Settings

Front panel buttons: UP/DOWN arrows, MODE, FAN, HOLD, MENU, SET CLOCK, DONE.

Display Icons: Heat/Cool mode indicators, Fan status, Hold/Vacation, Battery low, Filter reminder.

Menu Settings: System Type (Conventional/Heat Pump), Fan Control (Auto/On), Temperature Limits, Filter Timer, Clock Format, Temperature Display (°F/°C), Reset to Factory Defaults.

Wiring Configuration

Standard terminal designations for HVAC system connections.

Terminal	Wire Color	Function
R / Rc / Rh	Red	24VAC Power
W / W1	White	Heat Stage 1
Y / Y1	Yellow	Cool Stage 1
G	Green	Fan Control
C	Blue/Black	Common 24VAC
O/B	Orange	Heat Pump Reversing Valve
AUX/E	Brown	Auxiliary Heat/Emergency Heat

Tip: Refer to HVAC system manual for specific wiring requirements. Take photo of old thermostat wiring before removal.

Programming Schedule

Create custom temperature schedules for energy savings and comfort.

Press MENU button and select PROGRAM SCHEDULE.
Select day: Choose individual days or COPY to multiple days.
Set periods: Up to 4 periods per day (Wake, Leave, Return, Sleep).
Adjust temperatures: Use UP/DOWN arrows for each period.
Save: Press DONE to save and exit programming mode.
Test: Allow system to run through complete daily cycle.

Energy Saving Tip: Set temperatures 7-10°F lower/heating or higher/cooling when away or sleeping.

System Operation

Daily use and special function operations.

Temperature Adjustment: Press UP/DOWN arrows to temporarily override program.
Mode Selection: Press MODE to cycle through OFF, HEAT, COOL, AUTO.
Fan Control: Press FAN to toggle between AUTO and ON continuous.
Hold Function: Press HOLD to maintain current temperature until canceled.
Vacation Mode: Access from MENU to set extended away period.
Filter Reminder: Reset after filter change via MENU > FILTER TIMER.

Care & Maintenance

Regular maintenance ensures optimal performance and longevity.

Clean display: Use soft, dry cloth only. No liquids or cleaners.
Check batteries: Replace AA batteries annually or when low battery icon appears.
Verify operation: Test heating and cooling cycles seasonally.
Update programming: Review and adjust schedule as lifestyle changes.

CAUTION! Do not use water or chemical cleaners on thermostat. Ensure power is off before battery replacement.

Regulatory Information

FCC Part 15: Class B digital device compliant. UL Listed. Meets applicable HVAC control standards. Copyright © American Standard Heating & Air Conditioning. For technical support, visit www.americanstandard.com or contact 1-800-428-4328. This product may be covered by one or more patents. Installation should comply with local building codes and regulations.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Blank display	Power loss / Dead batteries	Check circuit breaker; replace AA batteries.
System not responding	Incorrect wiring / Mode setting	Verify wiring connections; check HEAT/COOL/AUTO mode.
Temperature inaccurate	Location / Calibration	Relocate away from heat sources; check calibration in menu.
Short cycling	Temperature differential too small	Adjust temperature differential in advanced settings.
Fan runs continuously	Fan setting on ON / Wiring issue	Set fan to AUTO; check G terminal connection.
No heat/cool	System mode / Temperature setting	Select correct mode; ensure set point differs from room temp.

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

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