American Standard HVAC 4A7V0048A1000B Manual

The American Standard 4A7V0048A1000B is a high-efficiency residential split-system air conditioner with a nominal cooling capacity of 4 tons (48,000 BTU/h), featuring R-410A refrigerant, a scroll compressor, corrosion-resistant coil, sound-reducing fan, and compatibility with variable-speed air handlers. Designed for quiet operation and energy savings, it includes diagnostic LEDs, low-voltage connections, and requires professional installation. Below are key sections for safety, features, installation, setup, operation, maintenance, and troubleshooting.

Features at a Glance

Key components: Outdoor condenser unit with scroll compressor, aluminum coil, fan motor, control board with diagnostic LEDs, refrigerant service valves, low-voltage terminal block, and disconnect box.

Installation Requirements

Unpack and inspect unit for damage. Ensure proper location and clearances.

1. Select location: Outdoor, level pad, minimum 24" clearance on all sides, away from obstructions.
2. Install pad: Concrete or composite pad, level within 1/4".
3. Connect refrigerant lines: Brazed connections, nitrogen purge, leak test required.
4. Electrical connections: 240V AC, 60Hz, dedicated circuit with proper disconnect and fusing.
5. Connect to air handler: Match refrigerant lines and low-voltage wiring per diagram.

WARNING! Installation must be performed by a qualified HVAC technician. High voltage present; disconnect power before servicing.

First-Time Setup

After installation, perform initial startup and system check.

1. Power up: Ensure disconnect is ON; thermostat set to OFF.
2. Check refrigerant charge: Use manifold gauges; superheat/subcooling method per manual.
3. Test operation: Set thermostat to COOL, temperature below room temp; verify compressor and fan start.
4. Inspect airflow: Check air handler blower; ensure proper CFM and filter clean.
5. Verify diagnostics: Check control board LEDs for normal status (steady green).

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

Specifications

• Model: 4A7V0048A1000B
• Cooling Capacity: 48,000 BTU/h (4 tons)
• Refrigerant Type: R-410A
• Electrical: 208/230V, 1-phase, 60Hz
• Minimum Circuit Ampacity: 26.5 amps
• Maximum Overcurrent Protection: 40 amps
• Operating Temperature Range: 55°F to 115°F outdoor
• Sound Level: ≤ 75 dB(A) at 3 ft
• Dimensions (HxWxD): Approx. 31" x 35" x 31"
• Weight: Approx. 220 lbs

Controls and Settings

Primary control via thermostat; unit has internal control board with dip switches and diagnostic LEDs.

Thermostat Settings: COOL, OFF, HEAT (if heat pump), FAN AUTO/ON, temperature setpoints.

Unit Control Board: Dip switches for optional settings (fan delay, etc.). Diagnostic LEDs: Green (power), Yellow (compressor on), Red (fault code).

Adjustments: Refrigerant charge (field adjustable), fan speed (at air handler), thermostat programming.

Connecting to Thermostat & Air Handler

Low-voltage wiring (24V) between thermostat, air handler, and outdoor unit.

1. Turn off power at disconnect and breaker.
2. Connect thermostat wires: R (24V), C (common), Y (compressor), G (fan), O/B (reversing valve if heat pump).
3. Connect outdoor unit: Match terminals at low-voltage block (Y, C, etc.).
4. Connect air handler: Ensure proper wiring per diagram included with air handler.

Tip: Use 18-gauge thermostat wire; check connections for tightness.

Operating Modes

Cooling only operation (standard); heat pump version available for heating.

1. Cooling mode: Set thermostat to COOL, select desired temperature.
2. Fan mode: Set FAN to ON for continuous airflow, AUTO for cycling with cooling.
3. Thermostat programming: Set schedules for energy savings (if programmable thermostat).
4. Compressor protection: Built-in time delay prevents short cycling.
5. Low ambient operation: Optional low-ambient kit required below 55°F.

WARNING! Do not set thermostat below 60°F; may cause coil freezing. Allow unit to complete cycles.

Maintenance Procedures

Regular maintenance ensures efficiency and longevity. Perform annually or per schedule.

1. Clean condenser coil: Remove debris, gently wash with water (not pressure washer).
2. Check refrigerant charge: Measure subcooling/superheat; adjust if needed.
3. Inspect electrical: Tighten connections, check contactor, capacitors.
4. Lubricate fan motor (if required): Some models have sealed bearings.
5. Check airflow: Replace air filter at air handler; ensure registers open.

CAUTION! Disconnect power before any maintenance. Refrigerant handling requires EPA certification.

Care & Cleaning

Keep unit clear of debris, vegetation, and snow. Clean coil annually.

CAUTION! Do not use harsh chemicals or pressure washers on coil fins. Keep electrical components dry.

Regulatory Information

UL listed; complies with U.S. safety standards. EPA refrigerant handling regulations apply. Manufactured by American Standard Heating & Air Conditioning, a division of Trane Technologies. For support, visit www.americanstandardair.com or contact 1-800-628-4516. Model 4A7V0048A1000B is designed for residential use in North America.

Troubleshooting

Reset: Turn thermostat OFF, disconnect power for 1 minute, restore power.

Service: 1-800-628-4516; www.americanstandardair.com