American Standard HVAC TXC018C4 Manual

The American Standard TXC018C4 is a high-efficiency air conditioning condenser unit designed for residential use, featuring R-410A refrigerant, single-phase power operation, and compatibility with matched indoor coils and furnaces. This manual covers installation, operation, maintenance, and troubleshooting for certified HVAC technicians and qualified installers. Below are key sections for safety, specifications, installation procedures, startup, operation, and service.

Features at a Glance

Key components: Durable galvanized steel cabinet, high-efficiency scroll compressor, aluminum spine fin coil, weather-resistant fan motor, low-pressure switch, high-pressure switch, and factory-installed filter drier.

Installation Requirements

Select a suitable location and prepare the site. Unit must be installed by a qualified technician in accordance with national and local codes.

1. Location: Outdoor, level pad, minimum 12 inches clearance on all sides, away from obstructions.
2. Pad: Concrete or composite pad, level (±1/4 inch).
3. Lineset: Insulated refrigerant tubing, maximum length 80 ft (consult manual for charge adjustment).
4. Electrical: Dedicated circuit, proper disconnect within sight, correct wire size per NEC.
5. Condensate Drain: Properly trapped and routed per local code for indoor unit.

WARNING! Risk of electrical shock and refrigerant exposure. Disconnect all power before servicing. Use proper PPE.

Pre-Installation Checklist

Verify equipment and site conditions before beginning installation.

1. Verify model numbers of indoor and outdoor units match for approved system.
2. Inspect unit for shipping damage. Report any damage to carrier immediately.
3. Ensure pad is level, stable, and meets clearance requirements.
4. Check that electrical service is correct voltage and amperage.
5. Have all necessary tools, brazing equipment, vacuum pump, and manifold gauge set ready.

CAUTION! Do not operate unit without proper refrigerant charge and airflow. Severe compressor damage may occur.

Specifications

• Model: TXC018C4
• Cooling Capacity: 18,000 BTU/h (1.5 Ton)
• SEER Rating: Up to 16 SEER (with matched indoor unit)
• Refrigerant Type: R-410A
• Factory Charge: Sufficient for 15 ft lineset
• Electrical: 208/230V, 1 Phase, 60 Hz
• FLA / RLA: Refer to unit nameplate
• Max Fuse / HACR Breaker: As specified on nameplate
• Operating Ambient: 55°F to 115°F (13°C to 46°C)
• Sound Level: Approximately 72 dB(A)
• Net Weight: Approx. 125 lbs (57 kg)

Electrical Connections

Connect power and control wiring following wiring diagram on unit access panel.

Power Wiring: Use copper conductors only. Size per NEC and unit nameplate. Install a weatherproof disconnect within sight of unit.

Control Wiring: Connect 24V thermostat wires (Y, C, G, R/O) from indoor unit to outdoor unit terminal strip. Use minimum 18 AWG thermostat cable.

1. Disconnect all power at service panel.
2. Remove access panel on outdoor unit.
3. Route power wires through conduit knockout, connect to contactor (L1, L2).
4. Route low-voltage wires, connect to terminal strip.
5. Secure ground wire to ground lug.
6. Replace access panel securely.

Tip: Use anti-oxidant paste on aluminum wire connections. Torque all connections to specification.

Refrigerant Piping

Brazing, evacuation, and charging procedures.

1. Unbraze factory-installed service valves. Keep nitrogen flowing during brazing (3-5 PSI) to prevent oxidation.
2. Brace lineset to avoid vibration. Use line set brackets every 6-8 feet.
3. Connect vapor (suction) and liquid lines to corresponding service valves. Torque to specification.
4. Perform pressure test with dry nitrogen (typically 150-200 PSIG). Check for leaks with electronic leak detector.
5. Evacuate system to a deep vacuum (minimum 500 microns). Hold vacuum to verify no moisture or non-condensables.
6. Open service valves fully. Check final refrigerant charge by subcooling method (for TXV systems).

WARNING! R-410A operates at higher pressures than R-22. Use dedicated R-410A gauges, hoses, and recovery equipment.

Startup & Commissioning

Final checks and system startup.

1. Ensure all access panels are secure.
2. Set thermostat to OFF. Restore power at disconnect and indoor unit.
3. Set thermostat to COOL, temperature below room temp.
4. Verify condenser fan starts, compressor engages.
5. Measure operating pressures, superheat/subcooling, amp draws, and temperature drop across evaporator.
6. Record all measurements on startup report.
7. Explain basic operation and filter maintenance to homeowner.

CAUTION! Do not bypass safety controls. If unit does not start, troubleshoot before attempting restart.

Operation & Controls

Unit operation is controlled by the indoor thermostat. Standard 24V control.

Normal Cycle: On a call for cooling, thermostat energizes Y and G. Indoor blower starts. After a short delay, outdoor contactor closes, starting condenser fan and compressor.

Safety Controls: High-pressure switch opens on excessive discharge pressure. Low-pressure switch opens on loss of refrigerant charge. Compressor internal overload protects against overheating.

Thermostat Settings: Recommend setting cooling temperature no lower than 68°F for efficiency and comfort.

Maintenance Procedures

Annual maintenance by a qualified technician is recommended.

1. Clean Condenser Coil: Turn power off. Remove top grille. Use a soft brush and coil cleaner from inside out. Rinse gently with water.
2. Check Electrical Connections: Tighten any loose connections. Inspect contactor for pitting.
3. Inspect Fan Motor & Blades: Check for smooth operation, clean blades, lubricate motor if equipped with ports (most are permanently lubricated).
4. Check Refrigerant Charge: Verify subcooling/superheat.
5. Clear Area: Ensure 2 feet of clearance around unit, remove debris, trim vegetation.

CAUTION! Do not use a pressure washer on the coil. Bent fins reduce efficiency.

Warranty Information

American Standard provides a limited warranty for the TXC018C4. The standard compressor warranty is 10 years parts from date of original installation when registered online within 60 days. The base unit warranty is 5 years parts. Labor is not included. Warranty is void if unit is not installed by a licensed HVAC contractor, if refrigerant other than R-410A is used, or if proper startup procedures are not followed. For warranty registration and details, visit www.americanstandard.com or contact American Standard Customer Care.

Troubleshooting

Reset: Some faults may auto-reset after a set time. For persistent issues, power down entire system for 5 minutes before restoring.

Service: For technical assistance, contact American Standard at 1-800-926-9667 or visit www.americanstandard.com. Always reference full model and serial numbers.