American Standard HVAC 4TXM2142A15N0A Manual

The American Standard 4TXM2142A15N0A is a high-efficiency, 2-ton, 14 SEER residential air conditioner condenser unit designed for reliable cooling performance. It features a durable, weather-resistant cabinet, a scroll compressor for quiet operation, and compatibility with American Standard matched indoor coils and furnaces for optimized system efficiency. Below are key sections for safety, features, installation, setup, operation, maintenance, and troubleshooting.

Features at a Glance

Key components: Weather-resistant galvanized steel cabinet, Scroll compressor, Copper tube/aluminum fin coil, High and low-pressure switches, Liquid line filter-drier, Service valves.

Installation Requirements

This 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). Ensure proper drainage.
2. Electrical Connection: Install a properly sized, weatherproof disconnect switch within sight of the unit. Connect to 208/230V, 1-phase power with correct fuse/circuit breaker.
3. Refrigerant Lines: Connect clean, dehydrated copper linesets between the outdoor unit and the matched indoor coil. Brazing must be done with nitrogen purge.
4. Condensate Drain: Ensure indoor unit condensate line is properly installed and trapped.

WARNING! Risk of electrical shock and refrigerant exposure. Disconnect all power before servicing. Only EPA-certified technicians should handle refrigerant.

First-Time Startup & Commissioning

After installation, the system must be commissioned by a technician.

1. Pre-Start Check: Verify all electrical connections are tight. Check refrigerant lines for leaks. Ensure filter-drier is installed.
2. Evacuation & Charging: Evacuate the system to a deep vacuum (below 500 microns). Charge with the correct amount of R-410A refrigerant as specified on the unit rating plate.
3. Startup: Restore power at the disconnect and thermostat. Set thermostat to cooling mode below room temperature.
4. Measurements: Measure superheat/subcooling, system pressures, voltage, and amperage. Compare to specifications in the service facts.
5. Final Check: Verify proper condensate drainage and overall system operation.

CAUTION! Incorrect refrigerant charge will reduce efficiency, capacity, and compressor life.

Specifications

• Model Number: 4TXM2142A15N0A
• Cooling Capacity: 24,000 BTU/h (2 Tons)
• Efficiency Rating: 14 SEER
• Refrigerant Type & Charge: R-410A (Factory charge shown on rating plate)
• Electrical: 208/230V, 1 Phase, 60 Hz. Min Circuit Ampacity: 15.0, Max Fuse/Breaker: 25
• Operating Ambient Temp Range: 55°F to 115°F (13°C to 46°C)
• Sound Level: Approximately 72 dB(A)
• Liquid Line Connection: 3/8" SAE Flare
• Suction Line Connection: 3/4" SAE Flare
• Net Weight: Approx. 150 lbs (68 kg)

Controls and Operation

Primary control is via the indoor thermostat. The outdoor unit has an integrated control board managing the compressor and fan.

Thermostat Operation: Set to COOL mode and desired temperature. The thermostat signals the indoor and outdoor units to start.

Outdoor Unit Cycle: On a call for cooling, the compressor and condenser fan motor will energize. The unit will cycle off when the set temperature is satisfied.

Integrated Safeties: The control board monitors high pressure, low pressure, and compressor overload conditions. If a fault is detected, the unit will shut down and may attempt automatic restart after a delay.

Connecting to Indoor Unit

This condenser is designed for split-system application with a matched indoor coil (e.g., American Standard 4TXC) and air handler or furnace.

1. Ensure the indoor coil is properly installed in the ductwork or plenum.
2. Run the correctly sized liquid and suction linesets between units. Insulate the suction line.
3. Connect the 24V control wiring (typically Y, C, G) from the indoor unit/thermostat to the outdoor unit's terminal strip.
4. Follow the wiring diagram provided on the unit's access panel.

Tip: Using a non-matched indoor coil may void the warranty and reduce system efficiency and performance.

Maintenance Procedures

Homeowner (Annual):

1. Keep the area around the unit clear of leaves, grass, and debris (min 24").
2. Gently rinse the condenser coil with a garden hose (from the inside out) to remove dirt and pollen. Turn power OFF first.
3. Ensure the indoor air filter is changed regularly (every 1-3 months).

Professional Service (Annual):

1. Inspect electrical components and connections.
2. Clean condenser coil thoroughly if needed.
3. Check refrigerant charge via subcooling method.
4. Check and tighten all fasteners.
5. Lubricate fan motor bearings if not permanently sealed.
6. Verify proper system operation and safety controls.

Safety Features

High-Pressure Switch: Opens circuit if discharge pressure exceeds safe limit.

Low-Pressure Switch: Opens circuit if suction pressure drops too low (indicative of low charge or restriction).

Compressor Overload Protector: Internal protection against overheating.

Time Delay: Prevents short cycling; imposes a 5-minute delay between compressor off and on cycles.

Care & Cleaning

Condenser Coil: Turn OFF power at the disconnect. Remove the top grille and fan assembly if necessary for access. Use a soft brush and coil cleaner to remove debris, then rinse gently with water from the inside of the coil outward.

Cabinet: Wipe exterior with a damp cloth. Do not use harsh chemicals or pressure washers.

CAUTION! Never use a stick or metal object to clean the coil fins. Bent fins reduce airflow and efficiency. Always disconnect power before any cleaning.

Regulatory Information

This product complies with applicable U.S. safety and performance standards. R-410A refrigerant is an HFC and does not deplete the ozone layer. Proper recovery and recycling of refrigerant is required by EPA Section 608 regulations. The compressor contains lubricating oil. Dispose of unit in accordance with local ordinances. For warranty registration and information, visit www.americanstandardair.com. *Refer to the official warranty certificate for specific terms, conditions, and registration requirements.

Troubleshooting

Reset: If the unit locks out on a safety, turn off power at the thermostat and disconnect for 5 minutes, then restore power.

Service: For all technical and warranty service, contact a qualified American Standard Dealer. Do not attempt to repair electrical or refrigerant components yourself.