American Standard HVAC TXH025A4 Manual

The American Standard TXH025A4 is a high-efficiency air conditioner condenser unit designed for residential use, featuring a 2-ton cooling capacity, R-410A refrigerant, single-phase power operation, and compatibility with matched indoor coils and furnaces. This manual covers safety guidelines, installation procedures, operational instructions, maintenance requirements, troubleshooting, and warranty information for proper system performance and longevity.

1. Features at a Glance 2. Installation Requirements 3. First-Time Startup 4. Technical Specifications 5. Controls and Operation 6. System Connections 7. Maintenance Procedures 8. Safety Features 9. Care & Cleaning 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: High-efficiency scroll compressor, aluminum coil with Spine Fin™ technology, weather-resistant cabinet, single-speed fan motor, electrical disconnect, and refrigerant service valves.

Feature	Description
Cooling Capacity	24,000 BTU/h (2 tons)
Refrigerant	R-410A (requires specific handling)
SEER Rating	Up to 16 SEER for energy efficiency
Power Requirements	208/230V, 1 phase, 60 Hz
Sound Level	Reduced sound operation with insulated compressor compartment
Cabinet	Galvanized steel with powder-coat paint
Coil	Aluminum Spine Fin™ for corrosion resistance
Compressor	Scroll type with sound insulation
Fan Motor	Permanent split capacitor (PSC), single-speed
Dimensions	Approx. 31" W x 31" D x 26" H

Installation Requirements

Unpack unit and inspect for shipping damage. Select a suitable outdoor location.

Location: Place on level concrete pad or approved mounting system with minimum 24" clearance on all sides.
Electrical: Install dedicated circuit with proper disconnect per NEC codes. Connect to 208/230V single-phase power.
Refrigerant Lines: Connect pre-charged, insulated copper lines to indoor coil using brazing with nitrogen purge.
Condensate Drain: Ensure proper drainage from indoor unit to prevent water damage.
Final Check: Verify all electrical connections are tight and refrigerant lines are properly insulated.

WARNING! Installation must be performed by a qualified HVAC technician. Improper installation can cause injury, equipment damage, or void warranty.

First-Time Startup

After installation, perform system commissioning following these steps.

Power On: Ensure disconnect is OFF. Restore power at main panel, then turn on disconnect.
Thermostat Setup: Set thermostat to COOL mode and temperature below room temperature.
System Check: Listen for compressor and fan operation. Verify airflow from indoor vents.
Performance Verification: Measure temperature drop across indoor coil (typically 15-20°F).
Refrigerant Charge: Check subcooling/superheat per manufacturer specifications.

CAUTION! Do not operate without proper refrigerant charge. Allow 24 hours for system to stabilize before final adjustments.

Technical Specifications

Model: TXH025A4
Cooling Capacity: 24,000 BTU/h
Refrigerant Type: R-410A
Refrigerant Charge (Factory): See unit nameplate
Electrical Data: 208/230V, 1 phase, 60 Hz, Minimum Circuit Ampacity: 15A, Maximum Fuse Size: 25A
Operating Ambient Temperature: 55°F to 115°F
Sound Level: 72 dB(A) at 3 feet
Net Weight: Approx. 150 lbs
Compatible Indoor Units: Matched American Standard air handlers or furnaces
Warranty: Limited 10-year parts warranty when registered

Controls and Operation

Primary control is through compatible thermostat. Unit has internal safety controls and diagnostic LEDs.

Thermostat Operation: Set to COOL mode with desired temperature. Use FAN setting (ON for continuous, AUTO for cycle with compressor).

Unit Controls: Internal pressure switches, thermal overload protection, compressor short-cycle timer.

Diagnostic LEDs: Green LED indicates power. Red LED flashes error codes (1 flash = low pressure, 2 flashes = high pressure, 3 flashes = compressor overload, 4 flashes = low voltage, 5 flashes = communication error with indoor unit).

System Connections

Proper connection to indoor unit and electrical supply is critical for operation.

Refrigerant Lines: Connect liquid (small) and suction (large) lines using flare or braze fittings per code.
Electrical: Connect line voltage to contactor. Connect low-voltage control wires to appropriate terminals.
Condensate Management: Ensure indoor unit drain line is properly connected and trapped.
Communication Wiring: For communicating systems, connect data wires between indoor and outdoor units.

Tip: Always use copper refrigerant lines with proper wall thickness. Never use existing R-22 lines with R-410A.

Maintenance Procedures

Regular maintenance ensures efficiency and extends equipment life.

Monthly: Inspect area around unit for debris, vegetation, or obstructions.
Seasonal (Spring): Clean condenser coil with water spray (from inside out). Straighten bent fins.
Annual (Professional): Have licensed technician check refrigerant charge, electrical connections, fan motor, and compressor operation.
Winter Preparation: In cold climates, consider using a protective cover (ensure ventilation).
Filter Replacement: Replace indoor air filter monthly during cooling season.

WARNING! Disconnect power before performing any maintenance. Coil cleaning chemicals may be harmful if misused.

Safety Features

Multiple safety devices protect equipment and users: High-pressure switch, low-pressure switch, compressor thermal overload, fan time delay, short-cycle protection, and corrosion-resistant construction.

Care & Cleaning

Keep unit clean and free of debris for optimal performance.

Coil Cleaning: Turn off power. Remove debris from fins with soft brush. Rinse with garden hose (no high pressure).

Cabinet Cleaning: Wipe with damp cloth. Do not use abrasive cleaners or solvents.

Winter Care: In snowy areas, keep unit clear of snow accumulation. Do not operate heating elements near unit.

CAUTION! Never insert objects into fan area. Keep children and pets away from operating unit.

Regulatory Information

UL listed. Meets DOE efficiency standards. Contains refrigerant regulated by EPA Section 608. Proper recovery required during service. Manufactured to comply with applicable safety and performance standards. For technical support, contact American Standard at 1-800-628-8317 or visit www.americanstandardair.com. This product may be covered by one or more U.S. patents.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Unit not running	Power loss, thermostat setting, safety lockout	Check disconnect and circuit breaker. Verify thermostat settings. Wait 5 minutes for reset.
Red LED flashing	Fault condition	Count flashes: 1=low pressure, 2=high pressure, 3=overload, 4=low voltage, 5=communication error.
Insufficient cooling	Dirty filter, low refrigerant, restricted airflow	Replace filter. Check for blocked vents. Contact technician for charge check.
Unit cycles on/off frequently	Dirty coil, overcharge, thermostat location	Clean condenser coil. Check thermostat placement (away from heat sources).
Unusual noise	Loose parts, debris in fan, bearing wear	Turn off power. Tighten cabinet screws. Remove debris. Contact technician if noise persists.
Ice on refrigerant lines	Low airflow, low refrigerant charge	Check filter and indoor coil cleanliness. Contact technician for diagnosis.

Reset Procedure: Turn thermostat OFF. Turn disconnect OFF for 5 minutes. Restore power. Set thermostat to COOL.

Service: For repairs, contact qualified HVAC technician. Do not attempt refrigerant work without proper certification.