American Standard Thermostat Ceratherm T050.210 Manual

The American Standard Ceratherm T050.210 is a programmable thermostat designed for precise temperature control in residential and light commercial HVAC systems. It features a user-friendly interface, 7-day programming capability, backlit display, system mode selection (Heat/Cool/Auto/Off), fan control, and energy-saving settings. 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 Schedules 8. Energy Saving Features 9. Care & Maintenance 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Backlit LCD display, Menu/Select buttons, Up/Down temperature adjustment, System Mode selector, Fan control, Program Schedule buttons.

Feature	Description
7-Day Programmable	Set different schedules for each day of the week
Backlit Display	Easy viewing in low light conditions
System Modes	Heat, Cool, Auto, and Off settings
Fan Control	Auto or Continuous fan operation
Temperature Hold	Temporary override of programmed schedule
Energy Saving Mode	Reduces energy consumption during unoccupied periods
Filter Change Reminder	Alerts when HVAC filter needs replacement
Battery Backup	Maintains settings during power outages (requires 2 AA batteries)
Temperature Range	40°F to 99°F (4°C to 37°C)
Compatibility	Works with most 24VAC heating and cooling systems

Installation

Unpack and inspect contents. Ensure power to HVAC system is turned OFF at circuit breaker.

Remove old thermostat: Turn off power, remove cover, label wires, disconnect from terminals.
Mount new baseplate: Use provided screws and level to ensure proper mounting.
Connect wires: Match labeled wires to corresponding terminals (R, W, Y, G, C, etc.).
Attach thermostat: Align and snap onto baseplate.
Restore power and test operation.

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

First-Time Setup

After installation and power restoration, follow initial setup prompts.

Set time and day: Press MENU, navigate to CLOCK SETUP, enter current time and day.
Select temperature format: Choose between Fahrenheit (°F) or Celsius (°C).
Configure system type: Select appropriate system (Conventional Heat Pump, etc.).
Set program schedule: Use QUICK SETUP or customize daily schedules.
Install batteries: Insert 2 AA batteries for backup power.

CAUTION! Ensure correct wire connections to prevent system damage. Verify system operation in both heating and cooling modes.

Specifications

Model: Ceratherm T050.210
Power Supply: 24VAC from HVAC system; Battery backup (2 AA)
Display: Backlit LCD with temperature and status icons
Temperature Control Range: 40°F to 99°F (4°C to 37°C)
Programming: 7-day, 4 periods per day (Wake, Leave, Return, Sleep)
Accuracy: ±1°F (±0.5°C)
Compatible Systems: Single-stage conventional and heat pump systems
Terminals: R, Rc, Rh, W, Y, G, O/B, C, AUX
Operating Environment: 32°F to 122°F (0°C to 50°C); 0-90% RH non-condensing
Warranty: 5-year limited warranty

Controls and Settings

Access menus via MENU button. Front Panel: Temperature Up/Down, System Mode (Heat/Cool/Auto/Off), Fan (Auto/On), Hold button.

Display Icons: System mode indicator, Fan status, Hold indicator, Battery low warning, Filter reminder.

Menu Options: CLOCK SETUP, PROGRAM SCHEDULE, SYSTEM SETTINGS, ENERGY SAVINGS, FILTER REMINDER, RESTORE DEFAULTS. Temperature Adjustment: Press Up/Down arrows to set desired temperature. Hold Function: Press HOLD to temporarily override program; press again to resume schedule.

Connecting to HVAC System

Standard wiring for conventional systems: R (24VAC Power), W (Heat), Y (Cool), G (Fan), C (Common). Heat pump systems may require O/B terminal.

Turn OFF power at circuit breaker.
Label all wires before disconnecting from old thermostat.
Connect wires to matching terminals on T050.210 baseplate.
For heat pump systems, configure O/B reversing valve setting in SYSTEM SETTINGS.
Secure unused wires to prevent short circuits.

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

Programming Schedules

Create custom temperature schedules for different times of day.

Press MENU and select PROGRAM SCHEDULE.
Select day (MON, TUE, WED, THU, FRI, SAT, SUN) or COPY schedule to other days.
Set up to 4 periods per day: WAKE, LEAVE, RETURN, SLEEP.
For each period, set time and desired temperature.
Press SAVE to store schedule.
Use QUICK SETUP for pre-programmed energy-efficient schedules.
To temporarily override, press HOLD; to cancel hold, press HOLD again.
View current schedule by pressing MENU then PROGRAM REVIEW.

WARNING! Do not set extreme temperature differentials (more than 5°F) between periods as this may cause system strain.

Energy Saving Features

Energy Savings Mode: Reduces heating/cooling when away. Adaptive Recovery: Learns system cycle time to reach set temperature by scheduled time. Filter Change Reminder: Program interval (30-365 days) to maintain system efficiency.

Care & Maintenance

Clean display with soft, dry cloth only. Do not use liquids or cleaners. Replace batteries annually or when low battery icon appears. Reset filter reminder after changing HVAC filter.

CAUTION! Do not spray cleaning fluids directly on thermostat. Ensure thermostat is level for accurate temperature sensing.

Regulatory Information

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

Troubleshooting

Symptom	Possible Cause	Corrective Action
Blank display	Power loss or dead batteries	Check circuit breaker; replace batteries; verify 24VAC at R and C terminals.
System not responding	Incorrect wiring or settings	Verify wire connections; check system mode setting; ensure temperature setpoint is above/below room temperature.
Inaccurate temperature reading	Location or calibration	Relocate away from heat sources/drafts; check calibration in SYSTEM SETTINGS.
Short cycling	Temperature differential setting	Adjust cycle rate in advanced settings (consult installer).
Fan runs continuously	Fan setting or wiring	Check FAN setting (should be AUTO); verify G wire connection.

Reset: Menu > SYSTEM SETTINGS > RESTORE DEFAULTS to return to factory settings.

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