American Standard HVAC YCY024G1L Manual

The American Standard YCY024G1L is a high-efficiency residential air conditioning system featuring a 2-ton capacity, compatibility with variable-speed air handlers, R-410A refrigerant, and advanced humidity control. Designed for quiet operation and energy savings, it includes features like a two-stage compressor, durable WeatherGuard™ top, and compatibility with AccuLink™ communicating technology. Below are key sections for safety, features, installation, setup, operation, and troubleshooting.

Features at a Glance

Key components: Outdoor condensing unit with WeatherGuard™ top, two-stage scroll compressor, AccuLink™ communication port, refrigerant service valves, and high/low pressure switches.

Installation

Unpack and inspect contents. Select a level, stable outdoor location with proper clearance.

1. Prepare the site: Ensure a level concrete pad or approved mounting system is in place.
2. Connect refrigerant lines: Braze copper lines to unit service valves following proper procedures.
3. Connect electrical: Run appropriate gauge wire from disconnect to unit terminal block.
4. Connect communication cable: If using AccuLink™, run 18-gauge shielded cable to indoor unit.
5. Evacuate and charge: Evacuate system to 500 microns and charge with R-410A per nameplate.

WARNING! Installation must be performed by a qualified HVAC technician. Follow all local codes and safety procedures. Disconnect all power before servicing.

First-Time Startup & Commissioning

After installation, power on the system and perform initial setup.

1. Power up: Restore power at disconnect and indoor air handler/furnace.
2. Set thermostat: Configure compatible thermostat for two-stage cooling and desired settings.
3. Check operation: Initiate cooling cycle and verify proper airflow, refrigerant pressures, and temperatures.
4. Verify communication: If using AccuLink™, ensure thermostat displays proper equipment status.
5. Test safety controls: Verify high and low pressure switches, compressor operation, and fan function.

CAUTION! Do not operate without proper refrigerant charge. Ensure electrical connections are tight and correct.

Specifications

• Model: YCY024G1L
• Cooling Capacity: 24,000 BTU/h (2 Tons)
• SEER Rating: Up to 18 SEER (depending on matched indoor unit)
• Refrigerant Type: R-410A
• Operating Voltage: 208/230V, 1-Phase
• Electrical Data: Min Circuit Ampacity: 15.0, Max Overcurrent Protection: 25A
• Liquid Line Size: 3/8" OD
• Suction Line Size: 3/4" OD
• Sound Level: 72 dB(A) (varies with installation)
• Unit Weight: Approx. 150 lbs (68 kg)
• Operating Ambient: 55°F to 115°F (13°C to 46°C)

Controls and Settings

Primary control is through a compatible thermostat (e.g., American Standard AccuLink™). Unit has internal diagnostic LEDs on control board.

Thermostat Settings: Mode (Cool, Off, Auto), Fan (Auto, On), Temperature Setpoint, Staging (if manual).

Unit Control Board LEDs: LED1 (Power), LED2 (Communication Status), LED3 (Fault Code). Flash patterns indicate normal operation or specific faults.

Dip Switches (if applicable): May be used to set thermostat type (communicating vs conventional) or other options. Refer to installation guide.

Connecting Components

System consists of outdoor unit, indoor coil/air handler, thermostat, and refrigerant lineset.

1. Turn off all power at disconnect and indoor unit.
2. Match refrigerant lines to service valves (suction and liquid).
3. Connect high-voltage power (L1, L2, Ground) to terminal block.
4. Connect low-voltage communication cable (if used) to ACC terminals.
5. Connect condensate drain from indoor coil to proper drainage.

Tip: Use nitrogen purge while brazing to prevent oxidation inside lines. Always use a torque wrench on electrical connections.

Operation Modes

Operates primarily in cooling mode. Two-stage operation provides efficiency and comfort.

1. Cooling Mode (Stage 1): Thermostat calls for cooling, compressor runs at lower capacity for moderate cooling and humidity removal.
2. Cooling Mode (Stage 2): On higher demand, compressor runs at full capacity for maximum cooling.
3. Fan Mode: Indoor fan can operate independently for air circulation (set at thermostat).
4. Auto Mode: Thermostat automatically switches between heating and cooling based on setpoint (requires heat pump or dual-fuel system).

WARNING! Do not operate system in cooling mode when outdoor temperature is below 55°F (13°C) without special low-ambient kit. This can cause liquid floodback and compressor damage.

Maintenance Features

Diagnostic LEDs: Flash codes for troubleshooting. Quick-Connect Service Ports: For attaching pressure gauges. Filter Drier: Replaceable core for system protection. Access Panels: Removable for service access to electrical components and compressor.

Care & Cleaning

Disconnect power before any maintenance. Keep outdoor unit clear of debris, leaves, and vegetation (maintain 24-inch clearance). Gently clean condenser fins with a soft brush or low-pressure water from the inside out. Do not use a pressure washer. Check and clean indoor air filter monthly.

CAUTION! Do not bend or damage aluminum fins. Do not use chemicals or solvents on the cabinet. Have professional maintenance performed annually.

Regulatory Information

This product complies with applicable U.S. safety and performance standards. R-410A refrigerant is non-ozone depleting. Proper refrigerant recovery is required by EPA Section 608. Unit contains electrical parts that may produce arcs or sparks; keep away from flammable vapors. For support, visit www.americanstandardair.com or contact American Standard Customer Care at 1-800-228-2962.

Troubleshooting

Reset: Power cycle at disconnect may clear some temporary faults.

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