American Standard HVAC 4A7A4036N Manual

The American Standard 4A7A4036N is a high-efficiency, single-stage, 3-ton air conditioner condenser unit designed for residential use. It features a durable, weather-resistant cabinet, a scroll compressor for quiet operation, and a Spine Fin™ coil for enhanced heat transfer and corrosion resistance. Compatible with American Standard matched indoor units for optimized performance. Below are key sections for safety, features, installation, setup, operation, maintenance, and troubleshooting.

Features at a Glance

Key components: Weatherproof outdoor cabinet, Scroll Compressor, Spine Fin™ Coil, Liquid and Suction Line Service Valves, High and Low-Pressure Switches, Fan Motor, and Control Board.

Installation Requirements

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

1. Location: Place on a level, stable pad (concrete or composite). Ensure minimum clearances: 24" front, 12" rear/sides, 48" above for airflow and service access.
2. Electrical: Connect to dedicated branch circuit with correct amperage fuse/breaker. Install a field-supplied disconnect within sight of unit.
3. Refrigerant Lines: Connect pre-charged, insulated copper lineset from indoor evaporator coil. Brazing must be done with nitrogen purge to prevent oxidation.
4. Condensate Drain: Ensure indoor unit drain line is properly installed and trapped.
5. Final Check: Verify all electrical connections are tight and refrigerant lines are properly insulated and supported.

WARNING! Installation must be performed by a qualified HVAC technician in accordance with all local codes and the National Electrical Code (NEC). Disconnect all power before servicing.

First-Time Startup & Commissioning

After installation, perform system commissioning.

1. Power On: Ensure thermostat is set to OFF. Restore power at disconnect and indoor air handler/furnace.
2. System Check: Set thermostat to COOL mode, temperature below room temp. The outdoor fan and compressor should engage.
3. Measurements: Measure superheat (for fixed orifice) or subcooling (for TXV systems) per unit data plate. Adjust refrigerant charge if necessary.
4. Airflow: Verify correct airflow across indoor coil (typically 400 CFM per ton). Adjust blower speed if needed.
5. Electrical: Measure voltage and amp draw on compressor and fan motor. Compare to rated load amperage (RLA).

CAUTION! Do not operate without correct refrigerant charge or proper airflow. This can cause compressor failure.

Specifications

• Model: 4A7A4036N
• Cooling Capacity: 36,000 BTU/hr (3 Tons)
• SEER Rating: Up to 16 SEER (with matched indoor unit)
• Refrigerant Type & Charge: R-410A, Factory Pre-charged for 15' lineset
• Electrical Data: 208/230V, 1 Phase, 60 Hz. Minimum Circuit Ampacity (MCA): 19.0, Maximum Overcurrent Protection (MOP): 25A
• Compressor: Scroll, HERmetically Sealed
• Fan Motor: 1/5 HP, PSC, 1075 RPM
• Operating Ambient Temp Range: 55°F to 115°F
• Sound Level: Approximately 74 dB(A)
• Net Weight: 168 lbs
• Dimensions (LxWxH): 33" x 33" x 29"

Controls and Operation

Primary control is via the indoor thermostat. Unit has an integrated control board with LED status light.

Thermostat Operation: Set to COOL and desired temperature. System cycles compressor and fan to maintain setpoint.

Outdoor Unit LED: Single LED on control board. Steady ON = normal operation. Flash codes indicate specific faults (see Troubleshooting).

Safety Controls: High and low-pressure switches will shut down compressor if pressures exceed safe limits. Internal thermostat on compressor provides overload protection.

Cycling: Compressor has a minimum off-time (typically 5 minutes) to prevent short cycling. Wait before expecting restart after shutdown.

Connecting to Indoor Unit & Thermostat

This is a split system requiring a matched indoor coil (evaporator) and air handler or furnace.

1. Indoor Unit: Must be an American Standard matched system for rated efficiency (e.g., TEM4/TEM6 air handler or evaporator coil with furnace).
2. Refrigerant Lines: Connect vapor (suction) and liquid lines between outdoor and indoor units. Use correct line size (typically 3/8" liquid, 3/4" or 7/8" suction).
3. Thermostat Wires: Standard 24V control wiring (minimum 18 AWG). Connect R (power), C (common), Y (compressor), G (fan) from indoor unit to outdoor unit control terminal strip.
4. Power Wires: L1 and L2 line voltage from disconnect to unit terminal block.

Tip: Label all wires before disconnecting. Refer to the wiring diagram on the unit's service panel.

Maintenance Procedures

Regular maintenance ensures efficiency and longevity. Turn OFF power at disconnect before any service.

1. Visual Inspection (Monthly): Check for debris around unit, bent fins, or signs of corrosion.
2. Coil Cleaning (Annually): Gently clean outdoor coil with a garden hose from the inside out. Use a fin comb to straighten bent fins.
3. Electrical Check (Annually by Pro): Inspect contactor points for pitting. Check capacitor(s) for proper microfarad rating and signs of bulging/leaking.
4. Refrigerant Charge Check (Annually by Pro): Verify system pressures and superheat/subcooling.
5. Fan Motor (As Needed): Lubricate motor per manufacturer instructions if not permanently sealed. Check for secure mounting and blade condition.

WARNING! Do not use a pressure washer on the coil. Do not attempt to service electrical components or refrigerant system unless qualified.

Safety Features & Shutdown

System includes multiple protections. If unit shuts down unexpectedly, a safety device may be activated.

• High-Pressure Switch: Opens on excessive discharge pressure (blocked coil, overcharge, high ambient).
• Low-Pressure Switch: Opens on low suction pressure (low charge, restricted filter, indoor airflow issue).
• Compressor Internal Thermostat: Protects against overheating.
• Time Delay Relay: Prevents compressor short cycling (approx. 5-minute delay).

Reset: Most switches auto-reset when condition normalizes. If unit trips repeatedly, call for service.

Care & Cleaning

Keep area around unit clear of leaves, grass clippings, and shrubs (minimum 24” clearance).

Cleaning Coil: With power OFF, remove top grille (if serviceable). Use a soft brush and hose to clean debris from the inside of the coil outward.

Winterizing (if in snowy region): Consider installing a raised platform or snow legs. Keep top and sides clear of snow accumulation. Do not use a cover that restricts airflow or traps moisture.

CAUTION! Never operate unit with a dirty or blocked coil. This increases pressure and can damage the compressor.

Regulatory Information

This product complies with applicable U.S. safety and performance standards. The refrigerant used (R-410A) has zero ozone depletion potential (ODP) but is a greenhouse gas. Federal law requires that refrigerant be recovered by an EPA-certified technician during service or disposal. This unit contains materials that may be recyclable. Check with local authorities for proper disposal. For support, contact your installing dealer or American Standard Customer Care.

Troubleshooting

LED Flash Codes (Consult full manual for exact code definitions): 1 Flash = Low Pressure, 2 Flashes = High Pressure, 3 Flashes = Compressor Overload, 5 Flashes = Low Voltage/Lockout.

Service: Contact your qualified American Standard dealer. For product information: www.americanstandardair.com