The American Standard ALLEGIANCE 4A7A4 is a high-efficiency residential air conditioning system featuring a scroll compressor, Spine Fin™ coil technology, durable galvanized steel cabinet with baked-on powder paint finish, sound-reducing features, and compatibility with various thermostats. Designed for reliable cooling performance with SEER ratings up to 16, it operates on 208/230V single-phase power. Below are key sections for safety, features, installation, setup, operation, maintenance, and troubleshooting.
Key components: Scroll compressor unit, Spine Fin™ condenser coil, Galvanized steel cabinet, Liquid and suction line service valves, High and low-pressure switches, Compressor sound blanket, Fan motor with permanent split capacitor.
| Feature | Description |
|---|---|
| Scroll Compressor | Provides quiet, reliable, and efficient operation |
| Spine Fin™ Coil | Enhanced heat transfer and corrosion resistance |
| Galvanized Steel Cabinet | Durable construction with powder paint finish for weather protection |
| Sound-Reducing Design | Compressor blanket and fan design minimize operational noise |
| Service Valves | Liquid and suction line valves for easy installation and service |
| High/Low Pressure Switches | Protects system from abnormal pressure conditions |
| Fan Motor | Permanent split capacitor type for efficient airflow |
| Electrical Disconnect | Required field-installed disconnect near unit |
| Refrigerant | R-410A, environmentally responsible |
| SEER Rating | Up to 16 SEER for energy savings |
Unpack and inspect unit for shipping damage. Select a level, stable outdoor location with adequate clearance.
WARNING! Installation and servicing of air conditioning equipment can be hazardous. Only trained, qualified personnel should install, repair, or service this equipment. Turn off all power before servicing.
After installation, perform initial system startup and checkout.
CAUTION! Do not operate without correct refrigerant charge. Improper charge can damage compressor.
Primary control is via the indoor thermostat. Unit has internal protection controls.
Thermostat Operation: Set to COOL, AUTO FAN, desired temperature. System cycles automatically.
Internal Safeties: High-pressure switch: Opens on excessive discharge pressure. Low-pressure switch: Opens on low suction pressure. Compressor overload: Internal protector. Time delay: Prevents short cycling (approx. 5 minutes).
Normal Operation Signs: Steady fan operation, warm air discharging from top of unit, condensate draining from indoor unit, quiet compressor hum.
Compatible with most 24VAC thermostats. Must be matched with an approved American Standard indoor coil/furnace.
Tip: Use a thermostat with compatible features for optimal performance and efficiency.
Regular maintenance ensures efficiency and longevity. Disconnect power before any service.
WARNING! Do not use a pressure washer on the coil. Do not bend fins. Only qualified technicians should check refrigerant charge or perform electrical repairs.
System includes multiple protections. Most will cause the system to shut down and require technician diagnosis.
High/Low Pressure Lockout: Switch opens, stopping compressor. Caused by dirty coil, restricted filter, refrigerant issue, or extreme ambient temps.
Compressor Overload: Internal protector trips on overheating. May reset automatically after cool-down.
Fuse or Circuit Breaker: External overcurrent protection at electrical panel.
Keep the outdoor unit clean and unobstructed.
CAUTION! Always turn off power at the disconnect before cleaning around the unit. Do not use harsh chemicals, solvents, or steam cleaners on the cabinet or coil. Rinse coil gently with water flowing in the direction of the fins.
This product complies with applicable U.S. safety and performance standards. The ALLEGIANCE 4A7A4 is covered by a limited warranty. See the warranty certificate included with the unit for specific terms, conditions, and duration (e.g., 10-year parts warranty on compressor, 5-year on functional parts). Registration may be required for full warranty coverage. For warranty service, contact an authorized American Standard dealer. For technical support or to locate a dealer, visit www.americanstandardair.com or contact American Standard Heating & Air Conditioning at 1-800-428-4326.
| Symptom | Possible Cause | Corrective Action |
|---|---|---|
| Unit does not start | Power off, thermostat setting, time delay | Check disconnect and breaker. Verify thermostat is set to COOL below room temp. Wait 5 minutes. |
| Fan runs, compressor does not | Low/high pressure lockout, overload, faulty contactor | Check for dirty coil or restricted airflow. Requires technician to check pressures and electrical components. |
| Insufficient cooling | Dirty filter/coil, low refrigerant, blocked registers | Replace indoor air filter. Clean outdoor coil. Ensure supply vents are open. If persists, call for service. |
| Unit cycles on/off frequently (short cycles) | Dirty filter, overcharge/undercharge, oversized unit, faulty sensor | Replace filter. Requires technician to check charge and system sizing. |
| Unusual noise (rattling, grinding) | Loose panel, debris in fan, failing motor or compressor | Turn unit off. Check for loose screws or foreign objects. If internal, call for service. |
| Ice on refrigerant lines or indoor coil | Low airflow (dirty filter/coil), low refrigerant charge | Turn system OFF. Let ice melt. Replace filter. If problem recurs, call for service (likely low charge). |
Reset: Some fault conditions may reset after a power cycle (turn disconnect off for 5 minutes, then on).
Service: For all repairs beyond basic homeowner maintenance, contact an authorized American Standard dealer. 1-800-428-4326; www.americanstandardair.com