The American Standard 4A7L5036N1000A is a high-efficiency, single-stage residential air conditioner with a nominal cooling capacity of 3 tons (36,000 BTU/H). It features a durable, weather-resistant cabinet, a scroll compressor for quiet and reliable operation, and is designed for use with matched indoor units. Below are key sections for safety, features, installation, setup, operation, maintenance, and troubleshooting.
Key components: Weather-resistant galvanized steel cabinet, Scroll compressor, Copper tube/aluminum fin coil, High and low-pressure service valves, Liquid line filter-drier, Control box with contactor and capacitor.
| Feature | Description |
|---|---|
| Compressor Type | Scroll compressor for efficiency and low sound levels |
| Refrigerant | R-410A, environmentally friendly |
| Cabinet | Galvanized steel, powder-coated for corrosion resistance |
| Coil | Enhanced surface copper tubes with aluminum fins |
| Electrical Requirements | 208/230V, 1-phase, 60 Hz |
| Sound Insulation | Internal sound blanket for quiet operation |
| Service Valves | High and low-pressure access ports |
| Protection Devices | High and low-pressure switches, compressor overload |
| Compatibility | Designed for use with matched American Standard indoor coils/furnaces |
| Warranty | Limited 10-year parts warranty upon timely registration |
Unpack and inspect unit for shipping damage. Select a suitable outdoor location.
WARNING! Installation must be performed by a qualified HVAC technician in accordance with all national and local codes. Incorrect installation can cause fire, electric shock, or equipment failure.
After installation, perform the following startup procedure.
CAUTION! Do not operate without correct refrigerant charge or proper airflow. This can cause severe compressor damage.
Primary control is via the indoor thermostat. Unit has internal protection controls.
Thermostat Operation: Set to COOL, select desired temperature. Fan can be set to AUTO (cycles with compressor) or ON (continuous).
Unit Controls: - Contactor: Energized by thermostat call to start compressor and fan. - Capacitor: Provides phase shift for compressor and fan motor startup. - High-Pressure Switch: Opens on excessive discharge pressure, shutting off compressor. - Low-Pressure Switch: Opens on low suction pressure, shutting off compressor. - Compressor Overload: Internal protector against overheating. - Time Delay Relay (if equipped): Prevents short cycling (approx. 5-minute delay).
This is a split system. Requires connection to an indoor coil (cased or uncased) and a furnace or air handler, controlled by a thermostat.
Tip: Refer to the installation manual of the specific indoor unit and thermostat for detailed wiring diagrams.
Annual maintenance by a qualified technician is recommended.
High & Low Pressure Switches: Protect compressor from abnormal system pressures. Unit will shut down. Requires technician to diagnose and correct root cause before resetting (usually automatic after pressure normalizes).
Compressor Internal Overload: Protects against overheating. Resets automatically when compressor cools.
Fused Disconnect: Required external component provides overcurrent protection.
Off-Season (Winter):
CAUTION! Never use sharp objects to clean fins. Do not use a pressure washer. Do not operate unit if coil is frozen or blocked.
This equipment is designed and certified in compliance with applicable UL and CSA standards. The refrigerant, R-410A, is regulated by the EPA under Section 608 of the Clean Air Act. Only EPA-certified technicians may service this equipment. Proper recovery and recycling of refrigerant is mandatory. This product contains materials that may be regulated at end-of-life. Dispose of according to local regulations. For technical support or warranty service, contact your local American Standard dealer or visit www.americanstandardair.com.
Note: Most troubleshooting and repair should be performed by a qualified technician.
| Symptom | Possible Cause | Corrective Action |
|---|---|---|
| Unit does not start | Power off, blown fuse/breaker, thermostat setting, time delay | Check disconnect and breaker. Verify thermostat is in COOL, set below room temp. Wait 5 minutes for time delay. |
| Unit runs but does not cool | Dirty filter/coil, low refrigerant, faulty compressor | Check/change indoor air filter. Clean outdoor coil. Call technician to check charge. |
| Unit cycles on/off rapidly (short cycles) | Dirty coil, overcharge, high head pressure, faulty pressure switch | Clean coils. Call technician to diagnose pressure issues. |
| Unit runs continuously | Extreme heat, undersized unit, dirty coils, low refrigerant | Normal during peak heat. Check for dirty filters/coils. Technician to verify charge and capacity. |
| Ice on refrigerant lines or outdoor unit | Low airflow (dirty filter/coil), low refrigerant charge | Turn system OFF. Check/replace air filter. Call technician to check airflow and refrigerant charge. |
| Unusual noise | Loose panels, debris in fan, failing motor or compressor | Turn off power. Tighten access panels. Clear debris from fan. Grinding or knocking noises require technician. |
Reset: Turning power off at disconnect for 5 minutes may reset internal controls.
Service: Contact your local American Standard Dealer. For product information: www.americanstandardair.com.