American Standard Thermostat AccuLink Platinum 850 Manual

The American Standard AccuLink Platinum 850 is a programmable communicating thermostat designed for use with compatible American Standard HVAC systems. It features a backlit touchscreen display, Wi-Fi connectivity for remote access via the AccuLink app, 7-day programming, humidity control, system status alerts, and energy usage monitoring. It supports multi-stage heating and cooling, fan control, and integrates with AccuLink zoning 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 Wi-Fi 7. Programming Schedules 8. Advanced Features 9. Care & Cleaning 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Touchscreen display, Control Unit, Wiring terminals, Power connector, Wi-Fi module, Mounting plate.

Feature	Description
Touchscreen Display	Backlit LCD for temperature, settings, and system status
Wi-Fi Connectivity	For remote control via AccuLink app (iOS/Android)
7-Day Programming	Custom schedules for each day of the week
Humidity Control	Displays and controls indoor humidity levels
Multi-Stage Support	Compatible with up to 2-stage heating and cooling
System Alerts	Notifications for filter changes, maintenance, faults
Energy Monitoring	Tracks HVAC runtime and estimated energy use
AccuLink Zoning	Integrates with compatible zoning systems
Fan Control	Manual/Auto fan operation
Power Source	24VAC from HVAC system or optional C-wire

Installation

Turn off HVAC system power at circuit breaker. Remove old thermostat if present.

Mount backplate: Level and secure to wall using provided screws.
Connect wiring: Match labeled terminals (R, C, Y1, Y2, W1, W2, G, O/B, etc.) to HVAC system wires.
Attach thermostat: Align and snap onto backplate.
Restore power: Turn circuit breaker back on.

WARNING! Installation should be performed by a qualified HVAC technician. Incorrect wiring can damage equipment.

First-Time Setup

After power restore, follow on-screen prompts.

Set language: Select ENGLISH (default).
Configure system type: Select heat pump, conventional, etc., as per HVAC equipment.
Set date and time: Enter current date and time for accurate scheduling.
Connect to Wi-Fi: Follow prompts to connect to home network for app access.
Test system: Run test cycle to ensure heating, cooling, and fan operate correctly.

CAUTION! Ensure correct system configuration to prevent improper operation.

Specifications

Display: Color touchscreen LCD with backlight.
Power: 24VAC, 20VA minimum; from HVAC system or C-wire.
Compatibility: American Standard AccuLink communicating systems; conventional 24V systems with appropriate interface.
Stages: Supports up to 2-stage heating, 2-stage cooling.
Programming: 7-day, 4 periods per day.
Temperature Range: 40°F to 99°F (4°C to 37°C).
Humidity Range: Display and control from 20% to 80% RH.
Wi-Fi: 2.4 GHz 802.11 b/g/n.
Operating Temp: 32°F to 122°F (0°C to 50°C).

Controls and Settings

Access menus via touchscreen. Main Screen: Displays current temp, set point, humidity, mode, and Wi-Fi status.

Touch Buttons: Mode (Heat/Cool/Auto/Off), Fan (On/Auto), Up/Down arrows, Menu, Hold, Schedule.

Settings Menu: System Setup (equipment type, stages), Preferences (temp units, backlight, key beep), Wi-Fi Setup, Schedule, Humidity Set Point, Alerts (filter, maintenance), Energy Reports, Zoning (if equipped).

Connecting to Wi-Fi

Required for remote access via AccuLink app.

From thermostat, go to Menu > Wi-Fi Setup.
Select network from list and enter password.
Thermostat will connect and display confirmation.
Download AccuLink app on smartphone, create account, and add thermostat using on-screen instructions.

Tip: Ensure thermostat is within range of Wi-Fi router. Use 2.4 GHz network.

Programming Schedules

Create custom 7-day schedule for energy savings.

Press Schedule button on main screen.
Select day (Mon-Sun, or copy to all).
Set up to 4 periods per day (Wake, Leave, Return, Sleep) with desired temperature.
Repeat for each day as needed.
Press Save to activate schedule.
Use Hold button to temporarily override schedule.

Note: Schedule can also be edited via AccuLink app.

Advanced Features

Humidity Control: Set desired humidity level in Settings; thermostat will activate humidifier/dehumidifier if equipped. System Alerts: Notifications for filter change (based on runtime), maintenance due, or system faults. Energy Reports: View runtime and estimated energy usage for heating/cooling in Menu > Energy. Zoning: If used with AccuLink zoning, configure zone settings via installer menu (protected by code).

Care & Cleaning

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

CAUTION! Avoid pressing screen with sharp objects. Keep away from direct sunlight and moisture.

Regulatory Information

FCC Part 15: Class B digital device; complies with limits for residential use. This device may not cause harmful interference and must accept any interference received. Copyright © American Standard Heating & Air Conditioning. For support, visit www.americanstandardair.com or contact customer service at 1-800-228-2962.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Blank screen	No power	Check circuit breaker; verify 24VAC at terminals; check C-wire connection.
Wi-Fi not connecting	Network issues	Verify password; ensure 2.4 GHz network; move closer to router; restart thermostat.
HVAC not turning on	Incorrect settings/wiring	Verify system mode (Heat/Cool); check wiring at thermostat and air handler; confirm equipment type in setup.
Incorrect temperature reading	Location	Ensure thermostat is not in direct sunlight or near heat sources; allow time to stabilize.
App not connecting	Account/network	Verify thermostat is online; check app login credentials; restart app and thermostat.

Reset: Menu > Preferences > Restore Factory Defaults (requires installer reconfiguration).

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