American Standard HVAC ALLEGIANCE 2A7A2 Manual

The American Standard ALLEGIANCE 2A7A2 is a high-efficiency residential air conditioning unit designed for reliable cooling performance. This manual covers the installation, operation, maintenance, and troubleshooting of the 2A7A2 series. Key sections include safety precautions, system specifications, installation guidelines, electrical connections, startup procedures, maintenance schedules, and warranty information.

Features at a Glance

Key components: High-efficiency scroll compressor, corrosion-resistant coil, sound-reducing fan, weatherproof cabinet, and factory-installed filter drier.

Installation Guidelines

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

1. Positioning: Place on level, stable pad with adequate clearance (min 24 inches on all sides).
2. Refrigerant Lines: Connect pre-charged linesets using proper brazing techniques and nitrogen purge.
3. Electrical: Run dedicated circuit from main panel to disconnect switch near unit.
4. Condensate Drain: Install drain line with proper slope away from unit.

WARNING! Unit contains refrigerant under pressure. Only qualified technicians should perform installation. Ensure power is disconnected before servicing.

First-Time Startup

After installation, perform systematic startup procedure.

1. Electrical Check: Verify correct voltage at disconnect switch (208/230V).
2. Refrigerant Charge: Check subcooling/superheat per manufacturer specifications.
3. System Operation: Turn on thermostat to cooling mode, set temperature below ambient.
4. Performance Verification: Monitor suction and discharge pressures, check for proper airflow.

CAUTION! Do not operate without proper refrigerant charge. Ensure all electrical connections are tight and properly insulated.

Specifications

• Model Series: 2A7A2
• Cooling Capacity: 1.5 to 5 tons (varies by model)
• SEER Rating: Up to 16 SEER
• Refrigerant: R-410A
• Electrical: 208/230V, 1 phase, 60 Hz
• Operating Ambient: 55°F to 115°F
• Sound Level: As low as 72 dB(A)
• Warranty: 10-year limited warranty on compressor, 5-year on parts
• Dimensions: Varies by tonnage (typical: 31"L x 31"W x 26"H for 3-ton)
• Shipping Weight: 150-280 lbs depending on model

Controls and Settings

Primary control through compatible thermostat. Unit includes built-in protection features.

Thermostat Settings: COOL, OFF, FAN (AUTO/ON). Set desired temperature with differential of 2-3°F.

Unit Controls: High-pressure switch, low-pressure switch, compressor overload protection, fan delay. No user-adjustable settings on outdoor unit - all adjustments made at thermostat or indoor unit.

Electrical Connections

Connect to dedicated circuit with proper disconnect.

1. Disconnect Power: Turn off main breaker before making connections.
2. Wire Sizing: Use copper conductors per NEC and local codes (typically 10-12 AWG for 1.5-3 ton units).
3. Terminal Connections: Connect line voltage to L1 and L2 terminals, low voltage to appropriate terminals.
4. Grounding: Connect equipment grounding conductor to ground lug.

Tip: Use torque wrench to tighten electrical connections to specified values (typically 15-20 in-lbs).

Operation and Performance

Designed for continuous operation during cooling season.

1. Normal Operation: Compressor and fan run when thermostat calls for cooling.
2. Cycling: Unit cycles on/off based on thermostat setting and load conditions.
3. Defrost Mode: Not applicable (cooling only unit).
4. Performance Monitoring: Check temperature drop across coil (typically 15-20°F).
5. Efficiency: Higher SEER rating reduces energy consumption compared to standard units.
6. Sound Levels: Quiet operation with sound-reducing features.
7. Capacity Modulation: Single-speed operation with proper sizing for load.

WARNING! Do not operate below 55°F ambient temperature. Ensure proper airflow through condenser coil.

Maintenance Procedures

Regular maintenance ensures optimal performance and longevity.

Monthly: Clean debris from around unit, check for unusual noises.

Seasonal: Clean condenser coil, check refrigerant charge, inspect electrical connections, verify proper airflow, check drain line.

Annual Professional Service: Comprehensive check including amp draw, pressures, capacitor test, and safety controls verification.

Care & Cleaning

Turn off power at disconnect before cleaning.

1. Condenser Coil: Use soft brush or low-pressure water spray to clean fins. Straighten bent fins with fin comb.
2. Exterior: Wipe cabinet with damp cloth. Do not use harsh chemicals.
3. Surrounding Area: Maintain 24-inch clearance, remove leaves and debris.
4. Winter Protection: Cover unit during off-season if desired (use breathable cover).

CAUTION! Do not use high-pressure water spray which can damage fins. Never insert objects into fan area.

Regulatory Information

UL Listed and complies with applicable safety standards. EPA Section 608 certified technicians required for refrigerant handling. Contains R-410A refrigerant which has zero ozone depletion potential but high global warming potential. Proper recovery required during service. Manufactured to meet DOE energy efficiency standards. For technical support, contact American Standard at 1-800-628-8313 or visit www.americanstandardair.com.

Troubleshooting

Reset: Turn off power at disconnect for 5 minutes, then restore power.

Service: 1-800-628-8313; www.americanstandardair.com