American Standard Thermostat Ceratherm 2050.111 Manual

The American Standard Ceratherm 2050.111 is a programmable thermostat designed for precise temperature control in residential heating and cooling systems. It features a digital display, multiple programming periods, automatic and manual override functions, battery backup, and compatibility with most 24V HVAC systems. Below are key sections for safety, features, installation, programming, 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 & Maintenance 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Digital LCD display, Program buttons, Temperature control buttons, Battery compartment, Wiring terminals.

FeatureDescription
Digital DisplayShows current temperature, time, day, and system status
Programmable Schedule4 periods per day (Wake, Leave, Return, Sleep)
Temperature Range40°F to 90°F (4°C to 32°C)
Battery BackupUses 2 AA batteries to retain settings during power loss
System Compatibility24V systems; Heat, Cool, Auto, Off modes
Hold/Temporary OverrideManual temperature override without changing program
Filter Change ReminderProgrammable alert for HVAC filter maintenance
Keypad LockPrevents unauthorized programming changes
BacklightIlluminates display when buttons are pressed
Factory ResetRestores default settings

Installation

Unpack and inspect contents. Turn off power to HVAC system at circuit breaker.

  1. Remove old thermostat: Label wires, disconnect from old thermostat base.
  2. Mount new baseplate: Level and secure to wall using provided screws.
  3. Connect wires: Match labeled terminals (R, W, Y, G, C, etc.) to baseplate.
  4. Attach thermostat: Align and snap onto baseplate.
  5. Install batteries: Insert 2 AA batteries for backup power.
  6. 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

Power on thermostat; follow initial setup prompts.

  1. Set time and day: Use PROGRAM button and arrow keys.
  2. Select temperature format: Choose Fahrenheit (°F) or Celsius (°C).
  3. Configure system type: Select Heat Only, Cool Only, or Heat/Cool (Auto).
  4. Set program schedule: Use default energy-saving schedule or customize later.
  5. Test operation: Run system in Heat and Cool modes to verify proper function.

CAUTION! Ensure wires are securely connected to prevent system malfunction.

Specifications

Controls and Settings

Access menus via PROGRAM button. Front Panel: UP/DOWN arrows, MODE (Heat/Cool/Auto/Off), HOLD, FAN (Auto/On).

Programming: PROGRAM button to access schedule; SET to confirm; arrows to adjust. System Mode: HEAT, COOL, AUTO, OFF. Fan Control: AUTO (cycles with system) or ON (continuous). Temporary Override: Press HOLD to maintain current temperature until next programmed period. Keypad Lock: Press and hold PROGRAM and UP arrow for 3 seconds.

Connecting to HVAC System

Standard wiring: R (24V power), W (Heat), Y (Cool), G (Fan), C (Common).

  1. Turn off HVAC system power at circuit breaker.
  2. Match thermostat wires to terminal labels on baseplate.
  3. For heat pump systems: Additional terminals (O/B) may be required.
  4. Secure wires under terminal screws; ensure no bare wire is exposed.
  5. Select correct system type in thermostat setup menu.

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

Programming Schedule

Default schedule provides energy savings while maintaining comfort.

  1. Press PROGRAM button to enter programming mode.
  2. Use arrows to select day (Mon-Fri, Sat, Sun, or All).
  3. Set Wake time and temperature (e.g., 6:00 AM, 68°F).
  4. Set Leave time and temperature (e.g., 8:00 AM, 62°F).
  5. Set Return time and temperature (e.g., 6:00 PM, 68°F).
  6. Set Sleep time and temperature (e.g., 10:00 PM, 62°F).
  7. Press PROGRAM to save and exit.
  8. Copy schedule to other days using COPY function if desired.

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

Energy Saving Features

Programmable schedule reduces energy use when away or asleep. Adaptive Recovery: Learns system cycle time to reach set temperature by programmed time. Filter Change Reminder: Set interval (30-90 days) to alert when filter needs replacement.

Care & Maintenance

Clean with soft, dry cloth only. Do not use liquids or cleaners. Check batteries every 6 months; replace when low battery icon appears.

CAUTION! Do not spray cleaning agents 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; trademarks of American Standard Companies, Inc. For support, visit www.americanstandard.com or contact 1-800-843-0304.

Troubleshooting

SymptomPossible CauseCorrective Action
Blank displayPower loss/dead batteriesCheck circuit breaker; replace AA batteries.
System not turning onIncorrect wiring/mode settingVerify wiring connections; ensure MODE is set to HEAT or COOL.
Inaccurate temperatureLocation/calibrationRelocate away from heat sources; check calibration in advanced settings.
Schedule not followingHOLD active/program errorCancel HOLD function; reprogram schedule.
Short cyclingTemperature differential too smallIncrease temperature differential in advanced settings (minimum 1°F).

Reset: Remove batteries, turn off power for 30 seconds, then restore to factory reset.

Service: 1-800-843-0304; www.americanstandard.com

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