American Standard Thermostat ASYSTAT606 Manual

The American Standard ASYSTAT606 is a programmable digital thermostat designed for residential heating and cooling systems. It features a backlit digital display, 7-day programming capability, automatic changeover between heating and cooling modes, temperature hold functions, and system status indicators. Compatible with most 24VAC single-stage HVAC systems, it provides precise temperature control and energy-saving scheduling. 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 buttons, Fan control, Program/Schedule buttons, Up/Down temperature arrows, Hold button, System switch.

Feature	Description
7-Day Programmable	Set different schedules for each day of the week
Automatic Changeover	Automatically switches between heating and cooling based on setpoint
Temperature Hold	Temporarily override programmed schedule
Backlit Display	Easy reading in low light conditions
System Status Indicators	LEDs for Heat, Cool, Fan On, and System status
Filter Change Reminder	Programmable alert for HVAC filter maintenance
Battery Backup	Maintains settings during power outages (requires 2 AA batteries)
Temperature Range	40°F to 99°F (4°C to 37°C)
Compatibility	24VAC single-stage heating and cooling systems
Fan Control	Auto or On settings for continuous fan operation

Installation

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

Remove old thermostat: Label wires before disconnecting.
Mount new baseplate: Level and secure to wall using provided screws.
Connect wires: Match labeled terminals (R, C, W, Y, G) to corresponding wires.
Attach thermostat: Align and snap onto baseplate.
Restore power and configure settings.

WARNING! Electrical shock hazard. Always turn off power before installation. If unsure, consult a qualified HVAC technician.

First-Time Setup

After installation, restore power and follow initial setup.

Set mode: Press MODE to select HEAT, COOL, or AUTO.
Set fan: Press FAN for AUTO or ON continuous operation.
Set temperature: Use Up/Down arrows to desired setpoint.
Set clock: Hold CLOCK button and adjust time using arrows.
Program schedule: See Programming Schedule section.

CAUTION! Ensure proper wire connections to prevent system damage.

Specifications

Power Supply: 24VAC from HVAC system; Battery backup (2 AA).
Temperature Range: 40°F to 99°F (4°C to 37°C).
Temperature Accuracy: ±1°F (±0.5°C).
Display: Backlit LCD with Fahrenheit or Celsius option.
Program Schedule: 4 periods per day (Wake, Leave, Return, Sleep).
Compatibility: Single-stage conventional and heat pump systems.
Wiring Terminals: R, C, W, Y, G, O/B (for heat pump).
Operating Environment: 32°F to 122°F (0°C to 50°C).
Dimensions: 5.5" x 3.5" x 1" (140mm x 89mm x 25mm).

Controls and Settings

Front Panel: MODE button (Heat/Cool/Auto/Off), FAN button (Auto/On), HOLD button, PROGRAM button, CLOCK button, Up/Down arrows.

Display Icons: Flame (Heating), Snowflake (Cooling), Fan (Fan On), Clock, Hold, Battery Low.

Settings Menu: Access by holding PROGRAM for 3 seconds. Options include: Temperature display (°F/°C), Filter change reminder interval (30-365 days), Temperature calibration (±5°F), System test mode.

Wiring Configuration

Standard terminal designations for single-stage systems:

Terminal	Wire Color	Function
R	Red	24VAC Power
C	Blue/Black	Common (24VAC return)
W	White	Heat Stage 1
Y	Yellow	Cool Stage 1
G	Green	Fan Relay
O/B	Orange	Heat Pump Reversing Valve

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

Programming Schedule

Default schedule provides energy-saving temperature setbacks.

Press PROGRAM button to enter programming mode.
Select day: Press DAY to choose specific day or group (Weekday/Weekend).
Set periods: For each period (Wake, Leave, Return, Sleep), use arrows to set temperature and time.
Copy schedule: Use COPY button to duplicate settings to other days.
Exit programming: Press PROGRAM again to save and exit.

Example Schedule: Wake 6:00 AM 70°F, Leave 8:00 AM 62°F, Return 5:00 PM 68°F, Sleep 10:00 PM 62°F.

Energy-Saving Features

Temperature Setbacks: Program lower heating temps and higher cooling temps when away. Adaptive Recovery: Learns system recovery time to reach setpoint by scheduled time. Filter Change Reminder: Reduces energy consumption by maintaining clean filters.

Care & Maintenance

Clean display with soft, dry cloth. Do not use liquids or cleaners. Replace batteries annually or when low battery icon appears. Check and replace HVAC filters as indicated by reminder.

CAUTION! Never spray cleaning fluids directly on thermostat. Turn off power before removing for cleaning.

Regulatory Information

FCC Part 15: Class B digital device compliant. UL Listed: Meets safety standards. Copyright © American Standard Heating & Air Conditioning. For support, visit www.americanstandardair.com or contact 1-800-228-2962. This product may be covered by one or more patents. Check local codes for installation requirements.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Blank display	Power loss/batteries	Check circuit breaker; replace batteries; verify 24VAC at R & C terminals.
System not responding	Incorrect mode/wiring	Verify mode setting (Heat/Cool); check wiring connections; ensure power is on.
Temperature inaccurate	Location/calibration	Relocate away from heat sources; use temperature calibration in settings.
Schedule not following	Hold active/programming	Check if HOLD is on; review programmed schedule times and temperatures.
Fan runs continuously	Fan setting/wiring	Set FAN to AUTO; check G terminal wiring; verify fan relay operation.

Reset: Remove batteries and disconnect from HVAC power for 30 seconds to restore factory defaults.

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