American Standard Thermostat ACONT850AC52UA Manual

The American Standard ACONT850AC52UA is a programmable touchscreen thermostat designed for compatibility with most single-stage and multi-stage heating and cooling systems, including heat pumps. It features a color touchscreen display, 7-day programming, adaptive recovery, smart response technology, humidity control, remote sensor compatibility, and Wi-Fi capability for remote access via the American Standard Home app. 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 Wi-Fi 7. Programming Schedules 8. Advanced Features 9. Care & Cleaning 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Color touchscreen display, mounting plate, wire labels, installation guide, level.

Feature	Description
Color Touchscreen	High-resolution, intuitive interface for easy navigation
7-Day Programming	Set different schedules for each day of the week
Adaptive Recovery	Learns system performance to reach setpoint at scheduled time
Smart Response Technology	Optimizes system runtime for comfort and efficiency
Humidity Control	Displays indoor humidity; compatible with humidifier/dehumidifier
Remote Sensor Compatible	Supports up to 3 remote sensors for temperature averaging
Wi-Fi Connectivity	Enables remote control via smartphone app
Filter Change Reminder	Alerts when to replace air filter based on runtime
System Status	Displays current mode, setpoint, and equipment activity
Backlit Display	Automatically adjusts brightness based on ambient light

Installation

Turn off power to HVAC system at circuit breaker. Remove old thermostat and label wires.

Mount plate: Level and secure to wall using provided screws.
Connect wires: Match labeled wires to terminals on plate (R, C, Y1, W1, O/B, G, etc.).
Attach thermostat: Align and snap onto mounting plate.
Restore power: Turn circuit breaker back on.

WARNING! Electrical shock hazard. Ensure power is OFF before installation. If unsure, consult a qualified HVAC technician.

First-Time Setup

After power restore, follow on-screen prompts to configure thermostat.

Select language: Choose preferred language (default ENGLISH).
Configure system type: Select heat pump, conventional, etc., as per your HVAC system.
Set date and time: Enter current date and time for accurate scheduling.
Connect to Wi-Fi: Follow prompts to connect to your home network (optional).
Test system: Run test cycle to ensure all connected stages operate correctly.

CAUTION! Incorrect system configuration may cause equipment damage. Refer to HVAC system manual or contact installer.

Specifications

Power: 24VAC from HVAC system; C-wire required for full functionality.
Compatibility: Single-stage and multi-stage conventional and heat pump systems (up to 2H/2C).
Display: Full-color LCD touchscreen.
Temperature Range: 40°F to 99°F (4°C to 37°C).
Humidity Display Range: 5% to 95% RH.
Wi-Fi: 2.4 GHz 802.11 b/g/n.
Programming: 4 periods per day, 7-day customizable schedule.
Warranty: 5-year limited warranty on parts.
Operating Environment: 32°F to 122°F (0°C to 50°C); 0% to 90% RH non-condensing.

Controls and Settings

Access menus by touching the screen. Main Screen: Displays current temp, setpoint, mode, humidity, and filter status.

Touch Buttons: MODE (Heat, Cool, Auto, Off), FAN (Auto, On), MENU, HOLD, DONE.

Settings Menu: System Setup (type, stages), Preferences (temperature scale, backlight, beep), Schedules, Alerts (filter, maintenance), Wi-Fi Setup, Dealer Info. Advanced Settings: Adaptive Recovery (On/Off), Smart Response (On/Off), Remote Sensor configuration, Humidity setpoints, Equipment output test.

Connecting to Wi-Fi

Enables remote control and alerts via American Standard Home app.

From thermostat, go to MENU > Wi-Fi Setup.
Select your 2.4 GHz network from list and enter password.
Thermostat will connect and display confirmation.
Download app on smartphone, create account, and add thermostat.

Tip: Ensure thermostat is within range of your Wi-Fi router. A strong signal is required for reliable connection.

Programming Schedules

Create energy-saving schedules for weekdays and weekends.

Go to MENU > Schedules.
Select day (Mon, Tue, etc., or group Weekday/Weekend).
Set up to 4 periods per day: Wake, Leave, Return, Sleep.
For each period, set time, heat setpoint, and cool setpoint.
Copy schedule to other days as needed.
Touch DONE to save. Schedule becomes active immediately.
Use HOLD button to temporarily override schedule.

WARNING! Do not set extreme setpoints that could cause system short-cycling or excessive runtime.

Advanced Features

Adaptive Recovery: Learns how long your system takes to reach temperature and starts early to hit setpoint exactly at scheduled time. Smart Response: Adjusts anticipator algorithms for more precise temperature control. Remote Sensors: If installed, go to MENU > Advanced Settings > Remote Sensors to select which sensor(s) to use for temperature control (e.g., average multiple rooms).

Care & Cleaning

Turn off power before cleaning. Gently wipe touchscreen with soft, dry, lint-free cloth. Do not use liquids, sprays, or abrasive cleaners.

CAUTION! Never spray cleaner directly on thermostat. Moisture can damage electronics.

Regulatory Information

FCC Compliance: This device complies with Part 15 of the FCC Rules. Operation is subject to the condition that this device does not cause harmful interference. ICES-003: Complies with Canadian ICES-003. Copyright © American Standard Heating & Air Conditioning. All rights reserved. For technical support, visit www.americanstandardair.com or contact 1-800-228-2962.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Blank screen	No power	Check circuit breaker; ensure C-wire is connected; verify 24VAC at terminals.
Wi-Fi won't connect	Network/range	Ensure 2.4 GHz network; check password; move router closer; restart thermostat.
HVAC not turning on	Settings/wiring	Check mode (Heat/Cool); verify setpoint; ensure correct wiring configuration.
Incorrect temperature	Location/sensor	Relocate thermostat away from heat sources; check remote sensor configuration.
Schedule not following	Hold active	Check if HOLD is on; cancel hold to resume schedule.

Reset: MENU > Preferences > Restore Factory Defaults (will erase all settings).

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