American Standard HVAC 4A7L6024A1COTA Manual

The American Standard 4A7L6024A1COTA is a 5-ton, 17.5 SEER2, single-stage air conditioner outdoor unit designed for residential use. It features a durable, corrosion-resistant WeatherArmor™ Ultra cabinet, Spine Fin™ coil technology for efficient heat transfer, a sound-dampening compressor compartment, and compatibility with American Standard communicating thermostats and indoor units. Below are key sections for safety, features, installation, setup, operation, and troubleshooting.

1. Features at a Glance 2. Installation 3. First-Time Setup & Startup 4. Specifications 5. Controls and Settings 6. Connecting to Indoor Unit & Thermostat 7. Operation & Maintenance 8. Diagnostics & Alerts 10. Care & Cleaning 11. Regulatory Information 12. Troubleshooting

Features at a Glance

Key components: Outdoor Condenser Unit, Spine Fin™ Coil, Copeland Scroll Compressor, Fan Motor, Control Board, Liquid and Suction Line Service Valves.

Feature	Description
WeatherArmor™ Ultra Cabinet	Galvanized steel with powder coat paint for corrosion resistance
Spine Fin™ Coil	Enhanced heat transfer and durability
Copeland Scroll Compressor	Single-stage, reliable operation with sound insulation
17.5 SEER2 Efficiency	High seasonal energy efficiency ratio
Communicating Capability	Works with American Standard AccuLink™ communicating system
Sound Reduction	Insulated compressor compartment and fan design
Service Valves	Liquid and suction line access for charging and service
Diagnostic LED	On control board for system status and fault codes
High & Low Pressure Switches	System protection
Factory Charge	R-410A refrigerant for up to 15 ft. lineset (may require adjustment)

Installation

Unpack and inspect unit for shipping damage. Select a level, stable outdoor location with adequate clearance.

Positioning: Place on a level concrete pad or approved support. Maintain minimum clearances: 24" top, 12" sides, 48" front (service).
Electrical Connection: Disconnect all power. Run properly sized copper wire from disconnect to unit terminal block (L1, L2). Ground per NEC.
Refrigerant Lines: Connect clean, dehydrated, and leak-checked refrigerant lineset to service valves. Brazing requires nitrogen purge.
Indoor Unit Connection: Connect control wiring between outdoor unit terminal block and indoor air handler/furnace.
Condensate Drain: Ensure indoor unit drain line is properly installed and unobstructed.

WARNING! Installation must be performed by a qualified HVAC technician. Handling refrigerant requires EPA certification. Risk of electric shock and personal injury.

First-Time Setup & Startup

After installation, perform initial startup and system check.

Pre-Start Check: Verify all electrical connections are tight. Ensure service valves are open. Check refrigerant charge via subcooling method.
Power On: Restore power at disconnect and indoor unit.
Thermostat Setup: Configure compatible thermostat (e.g., American Standard AccuLink) for cooling operation.
Test Operation: Set thermostat to cool mode, temperature below room temp. Verify outdoor fan and compressor engage. Listen for abnormal noises.
Check Performance: Measure temperature drop across indoor coil (typically 15-20°F). Verify system pressures are within range.

CAUTION! Do not operate without adequate refrigerant charge. Allow fan motor to stop completely before disconnecting power.

Specifications

Model: 4A7L6024A1COTA
Cooling Capacity: 5 Tons (60,000 BTU/h)
Efficiency: 17.5 SEER2
Refrigerant: R-410A
Electrical Data: 208/230V, 1 Phase, 60 Hz. Min Circuit Ampacity: 26.1A, Max Overcurrent Protection: 35A.
Compressor: Copeland Scroll, Single-Stage
Fan Motor: Permanent Split Capacitor (PSC)
Operating Ambient Temp: 55°F to 115°F
Sound Level: Approximately 74 dB(A)
Net Weight: 248 lbs
Dimensions (HxWxD): 34" x 35" x 35"

Controls and Settings

Primary control is via the indoor thermostat. Outdoor unit has a integrated control board with diagnostic LED.

Thermostat Settings: Mode (Cool, Off, Auto), Fan (Auto, On), Temperature Setpoint. For communicating systems: advanced staging, schedules, humidity control.

Outdoor Unit Control Board: Monitors system pressures, temperatures, and compressor operation. LED flash codes indicate status (steady = normal, flashing = fault).

Service Valves: Front-seated (closed) for service, back-seated (open) for normal operation.

Connecting to Indoor Unit & Thermostat

Compatible with American Standard variable-speed air handlers (TEM/TEP) or furnaces with appropriate coil.

Turn off all power to indoor and outdoor units.
Run low-voltage control wire (minimum 18 AWG, 3-conductor recommended) from outdoor terminal block to indoor unit terminal board.
Typical connections: Y (Cooling), C (Common), possibly O/B (Reversal valve for heat pump variant, not used for this model). Refer to wiring diagram on unit panel.
Connect thermostat wires to indoor unit control board per indoor unit manual.

Tip: Use a communicating thermostat (AccuLink) and control wire for full system diagnostics and efficiency.

Operation & Maintenance

For normal operation, use thermostat to set desired temperature.

Seasonal Startup: Remove any winter cover. Clear debris from around unit and coil fins. Ensure condenser coil is clean.
Routine Operation: System will cycle on/off automatically to maintain setpoint. Allow a few minutes between cycles for pressure equalization.
Shutdown: For winter, turn system off at thermostat. Consider a waterproof cover to protect from debris and ice.

WARNING! Do not insert fingers or objects into fan grille. Have a professional perform annual maintenance.

Diagnostics & Alerts

Control board LED indicates system status. Flashing pattern corresponds to fault codes (see label inside service panel). Common codes: Rapid Flash (Loss of Charge/Low Pressure), 2 Flashes (High Pressure), 3 Flashes (Compressor Overload). Communicating systems send alerts to thermostat display.

Care & Cleaning

Disconnect power before servicing.

Condenser Coil: Clean annually with a soft brush and coil cleaner. Rinse gently with water from the inside out. Straighten bent fins with a fin comb.
Exterior: Wipe cabinet with a damp cloth. Do not use harsh chemicals.
Area: Keep area around unit free of leaves, grass clippings, and debris (minimum 24" clearance).

CAUTION! Do not use a pressure washer on the coil. Do not attempt to clean electrical components.

Regulatory Information

This product complies with applicable U.S. safety and performance standards. R-410A refrigerant is regulated by the EPA Section 608. Proper recovery and recycling required. Unit contains materials that may be recyclable. For support, contact American Standard at www.americanstandardair.com or 1-800-428-4322.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Unit does not start	Power off, tripped breaker, thermostat setting	Check disconnect switch and circuit breaker. Verify thermostat is set to COOL and temp is below room temp.
Fan runs, compressor does not	Low pressure switch, time delay, faulty capacitor	Wait 5 minutes for reset. Check refrigerant charge. Have technician check capacitor and pressure switches.
Unit cycles on/off rapidly (short cycles)	Dirty filter, dirty coil, overcharge/undercharge	Replace air filter. Clean indoor and outdoor coils. Have technician check charge.
Reduced cooling capacity	Dirty filter/coil, low refrigerant, restricted airflow	Clean/replace filter. Clean coils. Check for blocked vents or dirty blower wheel. Call for service.
Ice on refrigerant lines or coil	Low airflow, low refrigerant charge	Turn system off. Check/replace filter. Ensure all supply vents are open. Call for service to check charge.
Unusual noise	Debris in fan, loose parts, compressor issue	Turn off power. Remove debris from fan area. Tighten access panels. Grinding or knocking noises require professional service.

Reset: Power cycle at disconnect. Some faults auto-reset after conditions normalize.

Service: Contact a qualified American Standard dealer. For warranty: 1-800-428-4322 or www.americanstandardair.com.