American Standard HVAC 4A6V7X48A1000A Manual

The American Standard 4A6V7X48A1000A is a high-efficiency, single-stage, 4-ton residential air conditioner with a SEER rating up to 16. Designed for reliable cooling performance, it features a durable WeatherGuard™ top, Spine Fin™ coil technology for enhanced heat transfer, and a sound-dampening compressor compartment. Compatible with American Standard matched systems for optimal efficiency. Below are key sections for safety, features, installation, setup, operation, maintenance, and troubleshooting.

Features at a Glance

Key components: Compressor unit with Spine Fin™ coil, WeatherGuard™ top, Liquid and Suction Line Service Valves, Low-Pressure Switch, High-Pressure Switch, and Control Box.

Installation Requirements

Unit must be installed by a qualified HVAC technician in accordance with all local codes and the National Electrical Code (NEC).

1. Location: Place on a level, stable pad (concrete or composite) with adequate clearance (min 24" on all sides, 48" above).
2. Electrical: Connect to dedicated 230V circuit with proper disconnect and fusing as per unit nameplate.
3. Refrigerant Lines: Connect pre-charged lineset from indoor unit. Ensure proper sizing, insulation, and brazing with nitrogen purge.
4. Condensate Drain: Connect to appropriate drainage system from indoor coil.
5. System Evacuation & Charging: Evacuate to 500 microns, charge with R-410A to specified subcooling.

WARNING! Risk of electrical shock and refrigerant exposure. Installation by unqualified personnel voids warranty and is dangerous.

First-Time Startup

After installation, perform startup procedure.

1. Pre-Start Check: Verify all electrical connections are tight. Ensure refrigerant charge is correct via subcooling method.
2. Power On: Turn on power at disconnect and indoor unit.
3. Thermostat Setup: Set thermostat to COOL mode, temperature below room temp. Fan to AUTO.
4. System Check: Listen for compressor and fan start. Verify cool air from supply vents.
5. Measurements: Technician should verify operating pressures, superheat/subcooling, voltage, and amperage.

CAUTION! Do not operate without proper refrigerant charge. Allow unit to stabilize for 10-15 minutes before taking measurements.

Specifications

• Model Number: 4A6V7X48A1000A
• Cooling Capacity: 48,000 BTU/h (4 Tons)
• SEER Rating: Up to 16
• Refrigerant Type: R-410A
• Electrical Data: 208/230V, 1 Phase, 60 Hz. Min Circuit Ampacity: 26.1, Max Fuse/Breaker: 35
• Compressor Type: Single-Stage Scroll
• Operating Ambient Temp: 55°F to 115°F
• Sound Level: As low as 72 dB
• Unit Dimensions (approx): 35" L x 31" W x 31" H
• Net Weight: Approx. 245 lbs

Controls and Operation

Primary control is via the indoor thermostat. Unit has internal safeties and control board.

Thermostat Operation: Set to COOL, select desired temperature. Fan setting AUTO (runs with cooling) or ON (continuous).

Unit Controls: Internal control board manages compressor, fan, and safeties (high/low pressure, time delay).

Normal Cycle: Thermostat calls for cooling, engages indoor blower, then outdoor unit fan and compressor after a short delay. Cycle ends when setpoint is reached.

Connecting to Thermostat & Furnace

This unit is designed to work with a matching indoor coil (evaporator) and furnace or air handler.

1. Low Voltage (Thermostat): Connect from indoor unit control board (Y, C, G, R) to thermostat. Y calls for cooling, G for fan, R is 24V power, C is common.
2. High Voltage: Connect L1 & L2 from disconnect to unit contactor.
3. Refrigerant Lines: Connect liquid (small) and suction (large, insulated) lines between indoor and outdoor units.

Tip: Refer to the indoor unit (furnace/air handler) installation manual for specific wiring diagrams.

Maintenance Procedures

Homeowner (Monthly/Seasonally):

1. Keep unit clear of debris, leaves, grass clippings (maintain 24" clearance).
2. Gently clean exterior coil fins with a soft brush or low-pressure water hose (power off).
3. Ensure condensate drain is clear.

Professional Technician (Annual):

1. Check refrigerant charge.
2. Inspect electrical components and connections.
3. Clean indoor evaporator coil (if accessible).
4. Check and tighten all fasteners.
5. Lubricate fan motor bearings (if not permanently sealed).
6. Measure voltage and amperage.

Error Codes & Diagnostics

Unit may flash LED codes on control board for diagnostics (refer to service manual for exact location and pattern).

• 1 Flash: Loss of Charge / Low Pressure Lockout
• 2 Flashes: High Pressure Lockout
• 3 Flashes: Compressor Overcurrent or Locked Rotor
• 4 Flashes: Loss of Line Voltage or Low Voltage
• 5 Flashes: Control Board Fault
• Continuous On: Normal Operation

Note: Most faults will cause the unit to enter a lockout mode. Power cycling may reset temporary faults. Persistent faults require professional service.

Care & Seasonal Preparation

Cooling Season: Remove winter cover. Clear debris. Turn on power at disconnect.

Off-Season (Winter):

1. Turn off power at the outdoor disconnect.
2. Consider installing a waterproof cover to protect from ice and debris. DO NOT use a plastic tarp that traps moisture.
3. Keep area around unit clear of snow and ice.

CAUTION! Never operate the air conditioner when outdoor temperatures are below 55°F without a special low-ambient kit (not included).

Regulatory Information

This product complies with applicable U.S. safety and performance standards. R-410A refrigerant is non-ozone depleting. Unit contains factory-charged refrigerant. Federal law requires that a certified technician recover refrigerant during service or decommissioning. For warranty service, contact an authorized American Standard dealer. Manufactured for American Standard Heating & Air Conditioning. For support: www.americanstandardair.com.

Troubleshooting

Reset: Turn thermostat to OFF, turn off power at disconnect for 5 minutes, then restore power and reset thermostat.

Service: Contact an authorized American Standard dealer. Do not attempt to repair electrical or refrigerant components yourself.