American Standard Thermostat Town Square T555730 Manual

The American Standard Town Square T555730 is a non-programmable, single-stage heating/cooling thermostat designed for residential HVAC systems. It features a simple dial interface for temperature selection, system mode control (Heat/Off/Cool), and fan operation (Auto/On). Compatible with most 24VAC systems, it includes a built-in mercury switch, requires no batteries, and has a temperature range of 40°F to 90°F. Below are key sections for safety, features, installation, wiring, operation, and troubleshooting.

1. Features at a Glance 2. Installation & Mounting 3. Wiring Instructions 4. Specifications 5. Controls and Operation 6. System Compatibility 7. Temperature Calibration 8. Maintenance 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Temperature dial, System selector (Heat/Off/Cool), Fan switch (Auto/On), Mounting plate, Wire terminals.

Feature	Description
Temperature Dial	Rotating knob to set desired temperature
System Selector	Switch for Heat, Off, or Cool mode
Fan Switch	Selects Auto (fan runs with HVAC) or On (continuous)
Mounting Plate	Base for wall mounting and wire connections
Wire Terminals	Screw terminals for standard HVAC wiring (R, W, Y, G, etc.)
Mercury Switch	Temperature-sensitive component (handle with care)
Temperature Scale	Display in Fahrenheit (40°F to 90°F)
Compatibility	24VAC single-stage heating and cooling systems
Power Source	Powered by HVAC system (24VAC); no batteries needed
Cover	Removable snap-on cover for access to dial and switches

Installation & Mounting

Turn off HVAC system power at breaker before installation. Choose an interior wall away from drafts, direct sunlight, or heat sources.

Remove old thermostat: Label wires, disconnect from old unit.
Mount new base plate: Use included screws and level; ensure wires pass through center.
Connect wires: Match labeled wires to corresponding terminals on plate (see Wiring section).
Attach thermostat: Snap onto mounted plate.
Restore power: Turn breaker back on.

WARNING! Electrical shock hazard. Always turn off power at circuit breaker before installation. Mercury switch is present; dispose of properly if damaged.

First-Time Setup & Wiring

Ensure power is off. Refer to wiring diagram included with thermostat.

Identify wires: Common labels: R (24VAC power), W (Heat), Y (Cool), G (Fan), C (Common, if used).
Connect to terminals: Insert stripped wire end under correct terminal screw; tighten securely.
Check connections: Ensure no loose strands touch other terminals.
System configuration: Set System selector to Off, Fan to Auto initially.

CAUTION! Incorrect wiring can damage HVAC equipment. If unsure, consult a qualified HVAC technician.

Specifications

Model: Town Square T555730
Type: Non-programmable, manual thermostat
Voltage: 24VAC (from HVAC transformer)
Stages: Single-stage heating, single-stage cooling
Temperature Range: 40°F to 90°F (4°C to 32°C)
Temperature Control: Mechanical dial with mercury switch
Fan Control: Auto/On toggle switch
System Control: Heat/Off/Cool toggle switch
Compatibility: Conventional gas, oil, electric heat; standard central air conditioning
Mounting: Standard wall plate; two-wire minimum
Dimensions: Approximately 4.5" H x 3.5" W x 1.5" D

Controls and Operation

Operation is manual via dial and switches on front panel.

To Adjust Temperature: Rotate dial clockwise to increase temperature, counterclockwise to decrease. Set to desired comfort level.

To Select Mode: Use System selector: HEAT for heating, COOL for air conditioning, OFF to shut down HVAC (fan may still run if set to ON).

To Control Fan: Use Fan switch: AUTO – fan runs only when heating or cooling is active; ON – fan runs continuously for air circulation.

Typical Settings: Winter: Set to HEAT, dial to 68°F-72°F, Fan AUTO. Summer: Set to COOL, dial to 74°F-78°F, Fan AUTO. Off-season: Set System to OFF.

Connecting to HVAC System

Compatible with most 24VAC forced air, hydronic, and heat pump systems (check compatibility for heat pumps).

Confirm system type: Single-stage heating (furnace, boiler) and cooling (central AC).
Match wiring: Standard 4-5 wire setup: R (power), W (heat), Y (cool), G (fan). C wire may be needed for some systems but is often not required for this model.
Test operation: After installation and power restore, set to Heat mode, raise temperature above room temp to activate furnace.

Tip: If system does not turn on, double-check wiring and ensure breaker is on. For heat pumps, consult an HVAC professional.

Temperature Calibration

The thermostat is factory calibrated. If temperature reading seems inaccurate:

Check location: Ensure thermostat is not in direct sunlight, near vents, or behind doors.
Allow stabilization: After adjustment, wait 15-30 minutes for system to respond and temperature to stabilize.
Use a separate thermometer: Place near thermostat to compare readings.
Note: This is a mechanical thermostat; no digital calibration is available. If consistently inaccurate, unit may need replacement.

WARNING! Do not attempt to open or adjust internal mercury switch. If damaged, contact professional for disposal and replacement.

Accessibility & Maintenance

Simple dial operation suitable for all users. Maintenance: Keep clean with dry cloth; ensure dial moves freely. No user-serviceable parts inside.

Care & Cleaning

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

CAUTION! Do not spray any liquids into unit. Avoid excessive force on dial or switches.

Regulatory Information

Complies with applicable FCC standards for residential use. Mercury Notice: This product contains a mercury switch. Do not dispose in regular trash. Follow local regulations for hazardous material disposal. For support, contact American Standard Customer Service at 1-800-843-0304 or visit www.americanstandardair.com.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No power to thermostat	Breaker off, blown fuse, loose wire	Check breaker/fuse; ensure R wire is connected securely.
Heat/Cool not turning on	Incorrect mode, set temp too close to room temp, wiring	Set System to Heat or Cool; set temp higher/lower than room temp; check W/Y wire connections.
Fan not running	Fan switch setting, loose G wire	Set Fan to ON; if still not running, check G wire connection.
Temperature inaccurate	Poor location, drafts	Relocate thermostat away from heat/cold sources; use separate thermometer to verify.
System short cycling	Thermostat placed in drafty area	Move thermostat to more stable interior location.

Reset: Turn System selector to OFF, wait 30 seconds, then set back to Heat or Cool.

Service: For persistent issues, contact a qualified HVAC technician. Do not attempt internal repairs.