American Standard HVAC ALLEGIANCE 4A7A2 Manual

The American Standard ALLEGIANCE 4A7A2 is a high-efficiency residential air conditioning system designed for reliable cooling performance. This split-system unit features a durable compressor, corrosion-resistant coil, and quiet operation, compatible with matching indoor units for optimal efficiency. Below are key sections covering safety, features, installation, operation, maintenance, and troubleshooting.

1. Features at a Glance 2. Installation Guidelines 3. First-Time Startup 4. Specifications 5. Controls and Settings 6. Connecting Components 7. Operating Modes 8. Maintenance Procedures 10. Care & Cleaning 11. Regulatory Information 12. Troubleshooting

Features at a Glance

Key components: Outdoor condensing unit with compressor, coil, fan motor, electrical connections, refrigerant ports, and service valves.

Feature	Description
Compressor	Scroll-type for efficient and quiet operation
Coil	Corrosion-resistant copper tube/aluminum fin
Fan Motor	Permanent split capacitor (PSC) for reliable airflow
Electrical Connection	Field wiring terminals for power and control
Refrigerant Ports	Service valves for charging and evacuation
Sound Insulation	Quiet operation design
Drain Connection	For condensate removal (indoor unit)
Filter Drier	Removes moisture and contaminants
High/Low Pressure Switches	Safety protection
Thermostat Connection	Compatible with standard 24V thermostats

Installation Guidelines

Unpack and inspect unit for damage. Select appropriate location.

Position outdoor unit: Place on level pad with adequate clearance (min 24" on all sides).
Connect refrigerant lines: Braze copper lines between indoor and outdoor units.
Connect electrical: Run high-voltage power to disconnect; connect low-voltage thermostat wires.
Connect condensate drain: Route PVC pipe from indoor unit to drain.
Evacuate and charge system: Pull vacuum to 500 microns; charge with R-410A refrigerant.

WARNING! Installation must be performed by qualified HVAC technician. Follow all electrical and refrigerant safety codes.

First-Time Startup

After installation, perform system commissioning.

Verify electrical connections: Ensure power disconnect is OFF before making connections.
Check refrigerant charge: Use manifold gauges to verify proper superheat/subcooling.
Set thermostat: Configure cooling setpoint, fan mode (AUTO/ON).
Test operation: Turn on power; verify compressor and fan operation; check airflow.
Measure performance: Check temperature drop across indoor coil (typically 15-20°F).

CAUTION! Do not operate without proper refrigerant charge. Ensure electrical connections are tight.

Specifications

Model: 4A7A2 series
Cooling Capacity: 1.5 to 5 tons (18,000 to 60,000 BTU/h)
SEER Rating: Up to 16 SEER
Refrigerant: R-410A
Electrical: 208/230V, 1-phase, 60Hz
Operating Voltage Range: 197-253V
Maximum Overcurrent Protection: As per unit rating plate
Sound Level: As low as 72 dB(A)
Operating Ambient: 55°F to 115°F
Dimensions (Outdoor Unit): Varies by tonnage

Controls and Settings

Primary control via thermostat. Outdoor unit has built-in protection controls.

Thermostat Settings: COOL mode, FAN (AUTO/ON), temperature setpoint, system OFF.

Outdoor Unit Controls: High/low pressure switches, compressor overload protection, fan delay, crankcase heater (if equipped).

Optional Features: Two-stage cooling with compatible thermostat, demand defrost control.

Connecting Components

System requires indoor unit (evaporator coil/furnace), thermostat, refrigerant lines, electrical, and condensate drain.

Turn off all power before connecting.
Match refrigerant line sizes per manufacturer specifications.
Use proper wire gauge for electrical connections.
Ensure condensate drain has proper slope (1/4" per foot).

Tip: Label all wires before disconnecting for easier reconnection.

Operating Modes

System operates in cooling mode only (requires separate heating system).

Cooling Mode: Thermostat calls for cooling when room temperature exceeds setpoint.
Fan Operation: AUTO (runs only during cooling cycle) or ON (continuous).
Compressor Operation: Cycles on/off to maintain setpoint; minimum off time of 5 minutes.
Defrost Cycle: Not applicable (cooling only unit).

WARNING! Do not operate below 55°F outdoor temperature. System may ice up.

Maintenance Procedures

Regular maintenance ensures efficiency and longevity.

Monthly: Check/replace air filter in indoor unit.
Seasonal: Clean outdoor coil with water spray (power off).
Annual: Professional inspection including refrigerant charge check, electrical connections, coil cleaning.
As needed: Clear debris from around outdoor unit.

CAUTION! Turn off power before any maintenance. Do not use pressure washer on coils.

Care & Cleaning

Keep outdoor unit clear of vegetation and debris. Clean indoor coil annually.

CAUTION! Do not bend coil fins. Use fin comb for straightening. Never use harsh chemicals.

Regulatory Information

UL listed. Complies with DOE energy efficiency standards. Refrigerant handling requires EPA Section 608 certification. Manufactured to meet AHRI standards. For support, contact American Standard at 1-800-628-8317 or visit www.americanstandardair.com.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Unit not running	Power loss, thermostat setting	Check circuit breaker; verify thermostat set to COOL below room temp.
Poor cooling	Dirty filter, low refrigerant	Replace filter; check for ice on lines; call technician for charge check.
Unit cycles on/off frequently	Dirty coil, oversized unit	Clean outdoor coil; verify proper sizing.
Noisy operation	Loose parts, debris	Tighten access panels; clear debris from fan.
Water leakage	Clogged drain line	Clear condensate drain line; check trap.

Reset: Turn thermostat OFF for 5 minutes, then back to COOL.

Service: 1-800-628-8317; www.americanstandardair.com