American Standard Thermostat asystat 570 Manual

The American Standard asystat 570 is a programmable digital thermostat designed for precise temperature control of residential heating and cooling systems. It features a backlit LCD display, 7-day programming capability, temperature hold functions, system status indicators, and compatibility with most 24VAC 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. Wiring Configuration 7. Programming Schedule 8. Energy Saving Features 9. Care & Maintenance 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Backlit LCD display, Mode button, Fan button, Up/Down arrows, Hold button, Program button, Menu button.

Feature	Description
7-Day Programming	Set different schedules for each day of the week
Temperature Hold	Temporarily override programmed schedule
Backlit Display	Easy viewing in low light conditions
System Status Indicators	Shows heating, cooling, or fan operation
Filter Change Reminder	Programmable alert for HVAC filter maintenance
Temperature Range	40°F to 99°F (4°C to 37°C)
Battery Backup	Maintains program during power outages
Compatibility	Works with most 24VAC heating/cooling systems
Temperature Display	Shows current room temperature and set point
Keypad Lock	Prevents unauthorized programming changes

Installation

Turn off power to HVAC system before installation. Remove old thermostat and prepare wall plate.

Mount wall plate: Level and secure to wall using provided screws.
Connect wires: Match wire labels to terminal screws (R, W, Y, G, C, etc.).
Attach thermostat: Align with wall plate and press until it clicks into place.
Restore power and configure settings.

WARNING! Always turn off power at circuit breaker before installation to prevent electrical shock.

First-Time Setup

After installation, restore power and configure initial settings.

Set clock: Press MENU, navigate to TIME SETTING, enter current time.
Select temperature format: Choose between Fahrenheit (°F) or Celsius (°C).
Configure system type: Select heat only, cool only, or heat/cool system.
Set program schedule: Use PROGRAM button to set daily temperature periods.

CAUTION! Ensure proper wire connections before restoring power to prevent system damage.

Specifications

Power Requirements: 24VAC from HVAC system or 2 AA batteries (backup).
Temperature Range: 40°F to 99°F (4°C to 37°C).
Temperature Accuracy: ±1°F (±0.5°C).
Display: Backlit LCD with temperature and system status.
Programming: 7-day, 4 periods per day programmable schedule.
Compatibility: Single-stage heating and cooling systems.
Terminals: R, W, Y, G, C, O/B, AUX.
Operating Environment: 32°F to 122°F (0°C to 50°C).

Controls and Settings

Access settings via front panel buttons. Display shows current temperature, set point, and system mode.

Buttons: MODE (Heat/Cool/Auto/Off), FAN (Auto/On), UP/DOWN arrows, HOLD, PROGRAM, MENU.

Settings: Clock setting, temperature format, system type (conventional/heat pump), program schedule, filter change reminder interval, keypad lock, temperature calibration, factory reset.

Wiring Configuration

Standard wiring for most 24VAC HVAC systems. Match wire colors to terminal labels.

Red wire (R): 24VAC power from transformer.
White wire (W): Heat stage 1.
Yellow wire (Y): Cool stage 1.
Green wire (G): Fan control.
Blue wire (C): Common (24VAC return).
Orange wire (O/B): Heat pump reversing valve.

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

Programming Schedule

Create energy-saving schedule with up to 4 temperature periods per day.

Press PROGRAM button to enter programming mode.
Select day(s) to program: Weekday, Weekend, or individual days.
Set wake time and temperature for period 1.
Set leave time and temperature for period 2.
Set return time and temperature for period 3.
Set sleep time and temperature for period 4.
Press DONE to save schedule.

WARNING! Do not set extreme temperature differentials (more than 5°F) between periods.

Energy Saving Features

Programmable schedule reduces energy use. Temperature hold for temporary override. Filter change reminder maintains system efficiency.

Care & Maintenance

Clean display with soft, dry cloth. Replace backup batteries annually. Check wire connections periodically.

CAUTION! Do not use liquid cleaners or abrasives on display. Turn off power before checking connections.

Regulatory Information

FCC Part 15: Class B digital device; complies with interference limits for residential use. UL listed for safety. Copyright © American Standard; trademarks of American Standard Companies, Inc. For support, visit www.americanstandard.com or contact 1-800-843-0304.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Blank display	Power loss or dead batteries	Check circuit breaker; replace backup batteries.
System not turning on	Incorrect wiring or settings	Verify wire connections; check system mode setting.
Incorrect temperature reading	Location or calibration	Relocate away from heat sources; calibrate temperature.
Schedule not following program	Hold function active	Press HOLD button to resume programmed schedule.
Short cycling	Temperature differential too small	Increase temperature differential in settings.

Reset: Menu > System > Factory Reset to restore default settings.

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