American Standard Thermostat ENFIELD T373.732 Manual

The American Standard ENFIELD T373.732 is a programmable thermostat designed for residential heating and cooling systems. It features a 7-day programming schedule, large backlit display, intuitive menu navigation, temperature hold functions, system status indicators, and compatibility with most 24V 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. Connecting to HVAC System 7. Programming Schedule 8. Energy Saving Features 9. Care & Cleaning 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Large backlit LCD display, Menu navigation buttons, System mode selector, Fan control, Hold button, Program override.

Feature	Description
7-Day Programming	Set different schedules for each day of the week
Backlit Display	Easy reading in low light conditions
Temperature Hold	Override programmed schedule temporarily
System Status Indicators	Shows heating, cooling, or fan operation
Battery Backup	Maintains settings during power outages (requires 2 AA batteries)
Filter Change Reminder	Programmable alert for HVAC filter maintenance
Keypad Lock	Prevents unauthorized changes to settings
Compatibility	Works with most 24V heating and cooling systems
Temperature Range	40°F to 99°F (4°C to 37°C)
Temperature Accuracy	±1°F (±0.5°C)

Installation

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.
Connect wires: Match labeled wires to corresponding terminals (R, W, Y, G, C, etc.).
Attach thermostat: Snap onto baseplate until it clicks.
Install batteries: Insert 2 AA batteries for backup power.
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, follow initial setup procedure.

Set date and time: Use MENU button to access clock settings.
Select system type: Choose heat only, cool only, or heat/cool system.
Set temperature units: Choose Fahrenheit or Celsius.
Program schedule: Set 4 periods per day (Wake, Leave, Return, Sleep).
Configure filter reminder: Set interval for filter change alerts.
Test system: Manually activate heating and cooling to verify operation.

CAUTION! Ensure proper wire connections before restoring power to prevent equipment damage.

Specifications

Power Requirements: 24V AC from HVAC system; 2 AA batteries for backup.
Display: Backlit LCD with temperature and system status.
Programming: 7-day, 4 periods per day programmable schedule.
Temperature Range: 40°F to 99°F (4°C to 37°C).
Compatibility: Most 24V heating, cooling, and heat pump systems.
Wire Terminals: R, Rc, Rh, W, Y, G, O/B, C, Aux/E.
Operating Temperature: 32°F to 122°F (0°C to 50°C).
Dimensions: 5.5" x 3.5" x 1" (140mm x 89mm x 25mm).
Warranty: 5-year limited warranty from date of purchase.

Controls and Settings

Front panel controls: MENU, UP/DOWN arrows, SYSTEM (Heat/Off/Cool), FAN (Auto/On), HOLD.

Menu Navigation: Press MENU to access settings: Clock, Schedule, System Setup, Filter Timer, Lock, Restore Defaults.

Temperature Adjustment: Use UP/DOWN arrows to set desired temperature. Schedule Programming: Access through MENU > Schedule. Set 4 periods: Wake (6 AM), Leave (8 AM), Return (6 PM), Sleep (10 PM) with different temperatures for each. Hold Function: Press HOLD to maintain current temperature until canceled. System Mode: Select HEAT, COOL, or OFF using SYSTEM button. Fan Control: Choose AUTO (fan runs with system) or ON (continuous fan operation).

Connecting to HVAC System

Proper wiring is essential for correct operation. Match thermostat terminals to HVAC system.

Turn off power at circuit breaker.
Label all wires from old thermostat before removal.
Connect to ENFIELD T373.732 terminals:
- R/Rc: 24V AC power (cooling)
- Rh: 24V AC power (heating)
- W/W1: Heat stage 1
- Y/Y1: Cool stage 1
- G: Fan control
- C: Common (24V return)
- O/B: Heat pump reversing valve
- Aux/E: Auxiliary heat or emergency heat
Secure wires to baseplate terminals.
Snap thermostat onto baseplate.

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

Programming Schedule

Create energy-saving schedule with different temperatures for different times.

Press MENU, select SCHEDULE.
Select day: Program each day individually or copy to other days.
Set periods: Adjust times and temperatures for 4 periods:
- Wake: Morning temperature (e.g., 6:00 AM, 70°F)
- Leave: Daytime setback (e.g., 8:00 AM, 62°F in winter)
- Return: Evening temperature (e.g., 6:00 PM, 68°F)
- Sleep: Nighttime setback (e.g., 10:00 PM, 65°F)
Copy schedule: Apply same schedule to weekdays or weekends.
Exit programming: Press MENU to save and exit.

Energy Tip: Set temperatures 7-10°F lower when away or sleeping to save energy.

Energy Saving Features

Adaptive Recovery: Learns how long system takes to reach temperature and starts early. Temperature Hold Override: Temporary override without changing programmed schedule. Filter Change Reminder: Reduces energy consumption by maintaining clean filters. Vacation Mode: Extended hold period for energy savings while away.

Care & Cleaning

Turn off power before cleaning. Use soft, dry cloth to clean display and casing. Do not use liquids or abrasive cleaners.

CAUTION! Never spray cleaning solutions directly on thermostat. Moisture can damage electronic components.

Regulatory Information

FCC Part 15: Class B digital device; complies with interference limits for residential use. UL Listed: Meets safety standards for thermostats. Copyright © American Standard; trademarks of American Standard Brands. For support, visit www.americanstandard.com or contact 1-800-735-4328. Disposal: Dispose of properly according to local electronic waste regulations.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Blank display	No power	Check circuit breaker; verify 24V at R and C terminals; replace batteries.
System not turning on	Incorrect wiring or settings	Verify wire connections; check SYSTEM mode (Heat/Cool); ensure temperature setpoint above/below room temperature.
Incorrect temperature reading	Location or calibration	Ensure thermostat not in direct sunlight or near heat sources; check calibration in advanced settings.
Short cycling	Settings or equipment	Adjust cycle rate in advanced settings; check HVAC equipment.
Fan runs continuously	Fan setting	Change FAN setting from ON to AUTO.
Schedule not following program	Hold active or programming error	Cancel HOLD function; verify schedule times and temperatures.

Reset: Menu > Settings > Restore Defaults to factory reset (erases all programming).

Service: 1-800-735-4328; www.americanstandard.com