American Standard Thermostat Enfield T37373X Manual

The American Standard Enfield T37373X is a programmable thermostat designed for residential heating and cooling systems. It features a 7-day programming schedule, large backlit display, intuitive navigation, system mode selection (Heat, Cool, Auto, Off), fan control (Auto, On), temperature hold functions, and filter change reminder. Compatible with most 24VAC single-stage 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: Backlit LCD display, Mode button, Fan button, Up/Down arrows, Hold button, Menu/Set button, System switch (Heat/Cool/Off/Auto).

Feature	Description
7-Day Programmable	Set different schedules for each day of the week
Large Backlit Display	Easy-to-read temperature and settings
System Mode Selection	Heat, Cool, Auto, Off
Fan Control	Auto or Continuous On
Temperature Hold	Temporarily override programmed schedule
Filter Change Reminder	Alerts when to replace HVAC filter
Battery Backup	Maintains settings during power outage
Compatibility	24VAC single-stage heating and cooling systems
Temperature Range	40°F to 99°F (4°C to 37°C)
Power Source	24VAC from HVAC system or 2 AA batteries

Installation

Turn off power to HVAC system at circuit breaker before installation.

Remove old thermostat: Label wires, disconnect from terminals.
Mount new baseplate: Level and secure to wall using provided screws.
Connect wires: Match labeled wires to 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. Ensure power is OFF before handling wires. If unsure, consult a qualified HVAC technician.

First-Time Setup

After installation and power restoration, configure initial settings.

Set time and day: Press MENU, navigate to CLOCK SETTINGS.
Select temperature format: Fahrenheit or Celsius.
Configure system type: For conventional or heat pump systems.
Set heating/cooling stages: Confirm single-stage setup.
Install batteries: For backup (if using battery power).

CAUTION! Verify system compatibility before installation to prevent equipment damage.

Specifications

Model: Enfield T37373X
Display: Backlit LCD with temperature and icons
Programming: 7-day, 4 periods per day
Temperature Range: 40°F to 99°F (4°C to 37°C)
Power Requirements: 24VAC, 20VA max; or 2 AA batteries
Compatibility: Single-stage conventional and heat pump systems
Terminals: R, Rc, Rh, W, Y, G, O/B, C, AUX/E
Operating Temp: 32°F to 122°F (0°C to 50°C)
Warranty: 5-year limited

Controls and Settings

Front Panel: MENU/SET, MODE (System), FAN, UP/DOWN arrows, HOLD, BACKLIGHT button.

Menu Navigation: Press MENU to access: SCHEDULE, CLOCK, SETTINGS, FILTER, VACATION.

System Modes: HEAT, COOL, AUTO (automatically switches between heat and cool), OFF. Fan Modes: AUTO (runs with HVAC cycle), ON (continuous). Temperature Hold: Press HOLD to override schedule temporarily; press again to cancel. Filter Reminder: Set interval (30-365 days) in FILTER menu. Backlight: Adjusts display brightness or auto-off timer.

Connecting to HVAC System

Ensure correct wire labeling and terminal connections.

Identify wires: Common (C), Power (R/Rc/Rh), Heat (W), Cool (Y), Fan (G), etc.
Insert wires: Push terminal tab, insert stripped wire, release tab.
Verify connections: Ensure no loose strands or crossed wires.
System configuration: In SETTINGS menu, match to your HVAC type.

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

Programming Schedule

Create a custom 7-day schedule for energy savings.

Access SCHEDULE menu: Press MENU, select SCHEDULE.
Select day: Choose individual days or copy to other days.
Set periods: Up to 4 periods per day (Wake, Leave, Return, Sleep).
Adjust temperatures: Use arrows to set heat and cool setpoints for each period.
Save: Press MENU to confirm and exit.
Override: Use HOLD for temporary changes; schedule resumes next period.
Vacation mode: Set away temperatures for extended periods.

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

Energy Saving Features

Programmable schedules reduce energy use. Adaptive Recovery: Learns system cycle time to reach setpoint by scheduled time. Filter reminder ensures efficient airflow. Vacation mode minimizes energy while away.

Care & Cleaning

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

CAUTION! Never spray cleaner directly on thermostat. Avoid excessive moisture.

Regulatory Information

FCC Part 15: Class B digital device; complies with interference limits for residential use. Copyright © American Standard Heating & Air Conditioning. For support, visit www.americanstandard.com or contact 1-800-228-2962. Dispose of batteries properly according to local regulations.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Blank display	No power	Check circuit breaker; verify 24VAC at terminals; install/replace batteries.
System not turning on	Incorrect wiring/mode	Verify wire connections; ensure system mode is HEAT or COOL, not OFF.
Incorrect temperature reading	Location/calibration	Relocate away from heat sources; check calibration in SETTINGS menu.
Schedule not following	Hold active/program error	Cancel HOLD function; review and reprogram schedule.
Short cycling	Settings/wiring	Adjust cycle rate in installer settings; check low-voltage connections.

Reset: Press and hold MENU and DOWN arrow for 5 seconds to factory reset.

Service: 1-800-228-2962; www.americanstandard.com