American Standard HVAC TTA240F A Series Manual

The American Standard TTA240F A Series is a high-efficiency, two-stage air conditioner designed for residential and light commercial applications. It features a durable WeatherGuard™ top, Spine Fin™ coil technology, two-stage Copeland scroll compressor, sound reduction system, and compatibility with American Standard communicating thermostats for optimal performance and efficiency. Below are key sections for safety, features, installation, setup, operation, and troubleshooting.

Features at a Glance

Key components: Two-stage Copeland scroll compressor, Spine Fin™ coil, WeatherGuard™ top, sound reduction system, refrigerant ports, service valves, and electrical connections.

Installation

Unpack and inspect contents. Place on level, stable pad.

1. Position unit: Place on concrete pad or approved mounting system with proper clearance.
2. Connect refrigerant lines: Braze lines to unit using nitrogen purge; ensure proper sizing.
3. Connect electrical: Run power and control wiring through conduit; follow local codes.
4. Connect condensate drain: Attach PVC drain line to unit drain connection.
5. Evacuate and charge: Evacuate system to 500 microns; charge with R-410A to specified weight.

WARNING! Unit is heavy; use proper lifting equipment. Ensure all electrical power is disconnected during installation.

First-Time Setup

Power on system; configure thermostat settings.

1. System power: Turn on disconnect switch; unit should be in standby mode.
2. Thermostat setup: Install compatible thermostat; configure for two-stage cooling.
3. Test operation: Set thermostat to cool mode; verify both stages engage properly.
4. Check airflow: Ensure proper airflow across indoor coil; adjust fan speed if needed.
5. Verify pressures: Check high and low side refrigerant pressures; adjust charge if necessary.

CAUTION! Only qualified HVAC technicians should perform setup and charging.

Specifications

• Model Series: TTA240F A Series.
• Cooling Capacity: 2 to 5 tons (varies by model).
• Refrigerant: R-410A.
• Electrical: 208/230V, 1-phase, 60Hz.
• SEER Rating: Up to 18 SEER.
• Sound Rating: As low as 72 dB.
• Operating Range: 55°F to 115°F outdoor temperature.
• Warranty: 10-year limited warranty on compressor and coil.
• Dimensions: Varies by tonnage (consult model-specific data).
• Weight: 150-250 lbs depending on model.

Controls and Settings

Primary control via compatible thermostat. Unit includes diagnostic LED on control board.

Thermostat Settings: Mode (Cool/Off), Fan (Auto/On), Temperature setpoint, Stage delay settings.

Unit Controls: Control board with diagnostic LED (flash codes), service test mode jumper, low-pressure switch, high-pressure switch.

Configuration: DIP switches on control board for optional accessories (humidifier, air cleaner).

Diagnostic Codes: LED flash patterns indicate normal operation or fault conditions (refer to service manual).

Connecting to System

Connect to matching indoor unit (furnace or air handler) and thermostat.

1. Turn off all power to indoor and outdoor units.
2. Connect refrigerant lines between indoor and outdoor units.
3. Connect control wiring: Typically 2-8 wires between thermostat, indoor unit, and outdoor unit.
4. Connect power wiring: Follow wiring diagram on unit panel.
5. Connect condensate drain from indoor unit to proper drainage.

Tip: Use copper refrigerant lines with proper insulation. Seal all electrical connections.

Operation Modes

Two-stage cooling operation for efficiency and comfort.

1. First stage: Unit operates at approximately 67% capacity for moderate cooling needs.
2. Second stage: Unit operates at 100% capacity for peak cooling demands.
3. Automatic staging: Thermostat determines stage based on temperature difference.
4. Fan operation: Indoor fan runs continuously or cycles with compressor (depending on thermostat setting).
5. Defrost mode: Not applicable (cooling only unit).
6. Standby mode: Unit powered but not actively cooling.
7. Diagnostic mode: Activated via jumper for service testing.

WARNING! Do not operate unit without proper refrigerant charge or airflow.

Maintenance & Service

Regular maintenance ensures optimal performance and longevity.

Annual Maintenance: Clean condenser coil, check refrigerant charge, inspect electrical connections, verify proper airflow, check condensate drain.

Service Procedures: Refer to service manual for detailed troubleshooting, component testing, and replacement procedures.

Care & Cleaning

Disconnect power before cleaning. Keep area around unit clear of debris.

1. Clean condenser coil: Use coil cleaner and gentle water spray from inside out.
2. Clear debris: Remove leaves, grass clippings from fan and coil area.
3. Straighten fins: Use fin comb to straighten any bent coil fins.
4. Check base pan: Ensure drain holes are clear of debris.

CAUTION! Do not use high-pressure water spray on electrical components. Do not clean while unit is running.

Regulatory Information

UL listed and complies with applicable safety standards. EPA refrigerant handling certification required for service. Manufactured to meet DOE efficiency standards. Copyright © American Standard Heating & Air Conditioning. For support, visit www.americanstandard.com or contact 1-800-428-4326. Proper disposal required per local regulations.

Troubleshooting

Reset: Turn power off for 5 minutes to reset control board.

Service: 1-800-428-4326; www.americanstandard.com