American Standard HVAC TTA200FD A Series Manual

The American Standard TTA200FD A Series is a high-efficiency residential gas furnace designed for reliable home heating. It features advanced two-stage heating technology, variable-speed blower motor, durable aluminized steel heat exchanger, quiet operation, diagnostic LED light, compatibility with various thermostats, and easy service access. Rated for natural gas (LP conversion kit available) with AFUE ratings up to 96%. Below are key sections for safety, features, installation, setup, operation, maintenance, and troubleshooting.

Features at a Glance

Key components: Two-stage gas valve, Variable-speed ECM blower motor, Aluminized steel primary heat exchanger, Stainless steel secondary heat exchanger, Integrated control board, Diagnostic LED, Flue outlet, Gas valve, Condensate drain connection, Filter rack.

Installation Requirements

Unpack and inspect unit for shipping damage. Ensure proper location with adequate clearance.

1. Location: Install in level position in indoor location (attic, basement, closet, or utility room).
2. Clearances: Maintain minimum clearances: 0" sides/rear, 24" front (service), 1" from combustible materials.
3. Venting: Use approved PVC pipe for category IV venting; follow local codes for termination.
4. Gas supply: Connect to 1/2" gas line with sediment trap; pressure test for leaks.
5. Electrical: Connect 120V AC power with dedicated circuit; connect thermostat wires to control board.
6. Drain line: Install condensate drain line with trap; route to floor drain or condensate pump.
7. Ductwork: Connect supply and return ducts securely; seal all joints.

WARNING! Installation must be performed by qualified HVAC technician in accordance with all local codes and manufacturer instructions. Gas furnaces can produce carbon monoxide; proper venting is critical.

First-Time Setup & Startup

After installation, perform initial startup sequence.

1. Verify installation: Check all connections (gas, electrical, venting, drain).
2. Install filter: Insert clean 1" or 4" filter in filter rack.
3. Gas pressure: Measure incoming gas pressure (min 5" WC for natural gas).
4. Power on: Turn on electrical power to furnace; control board will initiate self-test.
5. Thermostat setup: Set thermostat to "Heat" mode; raise temperature above room temp.
6. Observe operation: Listen for proper ignition sequence; verify flame and blower operation.
7. Check venting: Ensure proper draft and no obstructions in vent pipe.
8. Measure temperature rise: Verify temperature rise is within range on rating plate.

CAUTION! Never bypass safety controls. If furnace fails to start or locks out, diagnose using LED error codes before attempting restart.

Technical Specifications

• Model Series: TTA200FD A Series.
• Input BTU/h: 40,000 to 120,000 (varies by model).
• Output BTU/h: 38,000 to 115,000 (varies by model).
• AFUE: Up to 96%.
• Stages: Two-stage gas valve.
• Blower Motor: Variable-speed ECM.
• Electrical: 120V AC, 60Hz, 5.0 amps max.
• Gas Type: Natural gas (field convertible to LP).
• Venting: Category IV, PVC pipe (2" or 3").
• Static Pressure: Max 0.8" WC.
• Temperature Rise: 35-65°F.
• Dimensions (HxWxD): Varies by model (approx. 44" x 21" x 26").
• Warranty: Limited lifetime heat exchanger, 10-year parts.

Controls & Operation

Integrated control board manages all furnace operations with diagnostic capabilities.

Control Board: LED indicator (steady = normal, flashing = error code), DIP switches for configuration, terminal strip for thermostat connections.

Operation Sequence: 1. Thermostat calls for heat. 2. Inducer motor starts (pre-purge). 3. Pressure switch proves draft. 4. Hot surface igniter glows. 5. Gas valve opens (first stage). 6. Flame sensor confirms ignition. 7. Blower starts after heat exchanger warms. 8. Second stage engages if needed. 9. Cycle ends when thermostat satisfied.

DIP Switch Settings: Configure for proper airflow (CFM), thermostat type (single-stage, two-stage), and blower delays.

Thermostat Configuration

Compatible with most 24V thermostats including single-stage, two-stage, and programmable models.

1. Turn off power to furnace at disconnect or circuit breaker.
2. Remove furnace access panel to access control board terminals.
3. Connect thermostat wires: R (24V), C (common), W/W1 (heat stage 1), W2 (heat stage 2), G (fan).
4. Set DIP switches on control board to match thermostat type (see installation manual).
5. Restore power and test thermostat operation.

Tip: For optimal comfort and efficiency, use a two-stage programmable thermostat that matches the furnace's capabilities.

Maintenance Procedures

Regular maintenance ensures efficiency, reliability, and safety.

1. Monthly: Check/change air filter if dirty.
2. Annual (by technician): - Inspect heat exchanger for cracks/corrosion. - Clean burners and flame sensor. - Check gas pressure and adjust if needed. - Inspect vent system for obstructions. - Clean condensate drain and trap. - Check blower wheel and motor. - Verify all safety controls function. - Measure temperature rise and adjust blower speed if needed.
3. Seasonal: Before heating season, test operation; after season, consider professional tune-up.

WARNING! Only qualified technicians should perform internal maintenance. Homeowners should only replace filters and keep area clear.

Safety Features

Multiple safety systems protect against hazardous conditions.

• Flame Rollout Switches: Detect flame outside burners; shut off gas valve.
• Limit Switches: Monitor heat exchanger temperature; cycle blower or shut down if overheated.
• Pressure Switches: Prove inducer motor operation and proper vent draft.
• Flame Sensor: Confirms burner ignition; shuts off gas if no flame detected.
• Ignition Control: Limits trial-for-ignition period; locks out after multiple failures.
• Fuse Protection: 3-amp fuse on control board protects low-voltage circuit.

Carbon Monoxide: Install CO detectors near sleeping areas. Furnace produces CO during operation; proper venting is essential.

Care & Cleaning

Keep furnace area clean and unobstructed.

1. Exterior: Wipe cabinet with dry cloth; avoid water or cleaners.
2. Filter: Replace every 1-3 months depending on usage and filter type.
3. Vents: Keep intake and exhaust terminations clear of snow, leaves, debris.
4. Drain line: Flush condensate line annually with water/vinegar solution.
5. Area: Maintain clearances; do not store items near furnace.

CAUTION! Never use water or chemical cleaners inside furnace cabinet. Do not attempt to clean burners or heat exchanger yourself.

Regulatory Information

UL listed; ANSI Z21.47/CSA 2.3 certified. Complies with U.S. Department of Energy efficiency standards. Manufactured to meet or exceed ASHRAE 90.1 requirements. For installation in United States and Canada. Copyright © American Standard Heating & Air Conditioning. All rights reserved. For support, visit www.americanstandardair.com or contact 1-800-428-4328.

Troubleshooting

Reset Procedure: Turn off power for 30 seconds, then restore. If error persists, consult manual for specific error code.

Service: 1-800-428-4328; www.americanstandardair.com