American Standard Thermostat AHUI2360A200U Manual

The American Standard AHUI2360A200U is a programmable thermostat designed for HVAC system control, featuring a digital display, multiple programming schedules, temperature hold functions, system mode selection (Heat/Cool/Auto/Off), fan control, and compatibility with various heating and cooling systems. It includes a built-in installer setup menu, filter change reminder, and battery backup. 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. Wiring Configuration 7. Programming Schedules 8. Advanced Settings 9. Care & Maintenance 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Digital LCD display, Control buttons, Battery compartment, Wiring terminal block, Mounting plate, System mode switch.

Feature	Description
Digital Display	Shows current temperature, time, system status, and programming
Programmable Schedules	7-day programming with 4 periods per day (Wake, Leave, Return, Sleep)
System Modes	Heat, Cool, Auto, Off
Fan Control	Auto or On continuous operation
Temperature Hold	Temporary or Permanent hold options
Filter Change Reminder	Programmable alert for maintenance
Battery Backup	Uses 2 AA alkaline batteries for memory retention
Installer Setup Menu	Advanced configuration for system type and options
Keypad Lock	Prevents unauthorized programming changes
Backlight	Illuminates display when buttons are pressed

Installation

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

Remove old thermostat: Label wires, disconnect from old unit.
Mount new baseplate: Level and secure to wall using provided screws.
Connect wires: Insert labeled wires into corresponding terminals on baseplate.
Attach thermostat: Align and snap onto baseplate.
Install batteries: Insert 2 AA alkaline batteries into compartment.
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 basic settings.

Set time and day: Press SET CLOCK button, use arrows to adjust.
Select temperature format: In installer menu, choose °F or °C.
Configure system type: Access installer menu to set for conventional or heat pump.
Set filter reminder: Program interval (30-365 days) for filter change alert.
Test operation: Run system in Heat and Cool modes to verify proper function.

CAUTION! Incorrect wiring or settings can damage HVAC equipment. Verify all connections match system requirements.

Specifications

Power Source: 24VAC from HVAC system; 2 AA battery backup.
Temperature Range: 40°F to 99°F (Heat), 50°F to 99°F (Cool).
Display: Digital LCD with backlight.
Compatibility: Conventional and heat pump systems (1H/1C).
Terminals: R, Rc, Rh, W, Y, G, O/B, C, Aux/E.
Programming: 7-day, 4 periods per day.
Temperature Differential: Adjustable from 0.5°F to 3.0°F.
Operating Temp: 32°F to 122°F ambient.
Warranty: 5-year limited warranty.

Controls and Settings

Front Panel: LCD display, MODE button (Heat/Cool/Auto/Off), FAN button (Auto/On), UP/DOWN arrows, HOLD button, MENU button.

Basic Operation: Press MODE to select system operation. Use arrows to set temperature. Press HOLD for temporary override.

Menu Settings: Press MENU to access Time/Day, Schedule, Filter Reminder, Installer Setup, Keypad Lock.

Installer Setup: Access by holding MENU for 5 seconds. Configure system type, temperature format, cycle rate, staging, etc.

Wiring Configuration

Standard terminal designations for HVAC connections.

R/Rc/Rh: 24VAC power (R for single transformer, Rc/Rh for separate).
W: Heat stage 1.
Y: Cool stage 1.
G: Fan relay.
O/B: Heat pump reversing valve.
C: Common 24VAC.
Aux/E: Auxiliary heat or emergency heat.

Tip: Refer to HVAC system manual for proper terminal identification. Take picture of old thermostat wiring before removal.

Programming Schedules

Create energy-saving schedules for weekdays and weekends.

Access schedule: Press MENU, select SCHEDULE.
Select day: Choose weekday, weekend, or individual days.
Set periods: Program 4 periods (Wake, Leave, Return, Sleep) with desired temperatures.
Copy schedule: Copy settings to other days for consistency.
Exit: Press DONE to save and return to normal operation.

Note: Default schedule provides energy-saving temperatures. Adjust to match household routine.

Advanced Settings

Installer menu options for system optimization.

System Type: Conventional or Heat Pump.
Reversing Valve: O or B setting for heat pump.
Cycle Rate: Adjust heating/cooling cycles per hour (3-9).
Temperature Differential: Minimum temperature change before system activates.
Staging Options: Configure multi-stage system timing.
Filter Timer: Set days between filter change reminders.
Keypad Lock: Enable to prevent programming changes.

Care & Maintenance

Turn off power before cleaning. Use soft, dry cloth only; no liquids or cleaners.

Replace batteries annually or when low battery icon appears.
Clean display gently with microfiber cloth.
Check wiring connections periodically for corrosion or looseness.
Reset filter reminder after each filter change.

CAUTION! Do not spray cleaning solutions directly on thermostat. Avoid abrasive materials.

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.americanstandardair.com or contact 1-800-228-4972. This product may be covered by one or more patents. See website for details.

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 mode or wiring	Verify MODE setting; check wiring connections; ensure thermostat is not in HOLD.
Inaccurate temperature	Location or calibration	Relocate away from heat sources; access installer menu for temperature calibration.
Short cycling	Incorrect cycle rate setting	Adjust cycle rate in installer menu (recommended: 3-6 cycles per hour).
Filter light flashing	Filter reminder active	Change filter; reset reminder in menu.
Heat pump not reversing	Incorrect O/B setting	Access installer menu; change reversing valve setting to match system.

Reset: Remove batteries for 30 seconds to reset to factory defaults (except installer settings).

Service: 1-800-228-4972; www.americanstandardair.com