American Standard HVAC Odyssey TTA1504 D Manual

The American Standard HVAC Odyssey TTA1504 D is a high-efficiency, single-stage residential gas furnace with a 40-inch cabinet height, designed for upflow, horizontal left, or horizontal right airflow configurations. It features a durable aluminized steel primary and secondary heat exchanger, a multi-speed direct-drive blower motor, a hot surface ignition system, and integrated diagnostic controls. Below are key sections for safety, features, installation, setup, operation, and troubleshooting.

Features at a Glance

Key components: Aluminized steel heat exchanger, Multi-speed blower assembly, Integrated control board, Hot surface igniter, Pressure switch, Flame sensor, Gas valve, Filter rack.

Installation

Unpack and inspect contents. Ensure location meets clearance requirements.

1. Select Location: Install in a clean, dry area with sufficient service clearance (24 inches front, 6 inches sides/rear).
2. Set Furnace: Place on a level, non-combustible surface. Ensure proper orientation for selected airflow.
3. Connect Gas Supply: Use approved black iron pipe. Apply pipe dope suitable for natural gas. Pressure test for leaks.
4. Connect Venting: Install PVC intake and exhaust pipes per Category IV venting guidelines. Maintain slope back to furnace.
5. Connect Electrical: Provide 120V AC dedicated circuit. Connect low-voltage thermostat wires (R, W, G, Y, C).
6. Connect Ductwork: Attach supply and return plenums securely. Ensure proper sealing to prevent air leakage.

WARNING! Installation must comply with all local codes and ordinances. Gas line work should be performed by a qualified technician. Ensure power is disconnected during installation.

First-Time Setup & Startup

After installation, perform initial startup and system check.

1. Install Air Filter: Insert a clean 1-inch filter into the filter rack.
2. Verify Gas Supply: Ensure manual gas valve is open.
3. Power On: Restore 120V AC power to the furnace. The control board LED should flash once (power-on diagnostic).
4. Thermostat Call: Set thermostat to "Heat" mode and raise temperature above room temp to initiate a call for heat.
5. Observe Sequence: Listen for inducer motor start, pressure switch closure, hot surface igniter glow, gas valve opening, and flame ignition.
6. Check Operation: Verify warm air from supply registers. Monitor for proper cycling.
7. Adjust Blower Speed: If necessary, adjust the blower speed tap on the control board for desired airflow (CFM).

CAUTION! Do not bypass any safety devices. If furnace fails to start or locks out, refer to diagnostic LED and troubleshooting section.

Specifications

• Model: TTA1504 D
• Input BTU/h: 150,000 (Natural Gas)
• Output BTU/h: 120,000
• AFUE Efficiency: 80%
• Cabinet Dimensions: 21" W x 40" H x 29.5" D
• Electrical: 120V AC, 60Hz, 1.2A
• Gas Connection: 3/4" NPT
• Vent Connection: 3" or 4" PVC
• Maximum External Static Pressure: 0.8 in. w.c.
• Blower Speeds: 4 speeds for heating, 4 speeds for cooling (with A/C coil)
• Operating Temp Range: 45°F to 120°F ambient

Controls and Settings

Primary control is via the integrated furnace control board with diagnostic LED. User interface is through the connected thermostat.

Control Board LED Codes: 1 Flash = Normal operation. 2 Flashes = Pressure switch fault. 3 Flashes = Rollout limit open. 4 Flashes = Open high-temperature limit. 5 Flashes = Flame sensed with gas valve off (error). Continuous On = Call for heat (blower off).

Thermostat Settings: Set to "Heat" for winter operation, "Cool" for summer (with A/C), and "Fan On" for continuous blower operation.

Blower Speed Taps: Located on control board. HEAT (Black, Blue, Red, Yellow wires) and COOL (Brown, Orange, Purple, Tan wires). Match wire to desired CFM per installation manual.

Connecting to Thermostat & Ductwork

Low-voltage connections (R, W, G, Y, C) to thermostat. Secure duct connections.

1. Turn off power to furnace at disconnect or breaker.
2. Remove control board access panel.
3. Connect thermostat wires to terminal strip: R (24V power), W (Heat), G (Fan), Y (Cool), C (Common).
4. Route thermostat wire through provided knockout and secure.
5. For ductwork, attach supply plenum to top (upflow) or side (horizontal) of furnace. Attach return duct to bottom/side.
6. Use mastic or approved tape to seal all duct joints.

Tip: Use a level to ensure furnace is perfectly level for proper condensate drainage in horizontal applications.

Operating Instructions

Normal operation is automatic via thermostat.

1. Set Thermostat: Select "Heat" mode and desired temperature.
2. Start Sequence: Upon a call for heat, the inducer motor will start, followed by ignition and main burner operation.
3. Blower Delay: The blower will start approximately 30-60 seconds after burner ignition.
4. Satisfaction: When thermostat is satisfied, gas valve closes, burners extinguish. The blower will continue to run for a post-purge period (approx. 90 seconds).
5. Fan Only: Setting thermostat to "Fan On" will run the blower continuously for air circulation.

WARNING! Never operate the furnace without a clean air filter installed. Restricted airflow can cause overheating and damage.

Maintenance Schedule

Regular maintenance ensures efficiency and longevity.

• Monthly: Check air filter, replace if dirty.
• Annually (Before Heating Season): Professional inspection recommended. Includes: clean burners, inspect heat exchanger, check gas pressure, clean flame sensor, check all safety controls, lubricate inducer motor (if required), inspect vent system.
• As Needed: Clean condensate drain trap and tube.

Care & Cleaning

Turn off power and gas supply before servicing.

1. Air Filter: Replace disposable filter every 1-3 months. Clean reusable filter with mild detergent and water, dry completely.
2. Blower Assembly: Vacuum dust from blower wheel and motor annually.
3. Flame Sensor: Gently clean with fine emery cloth to remove oxidation.
4. Condensate Drain: Flush with water/vinegar solution to prevent algae clogs.
5. Exterior: Wipe cabinet with a dry cloth.

CAUTION! Do not use water or cleaners on electrical components or the burners. Never adjust the gas valve pressure setting unless qualified.

Regulatory Information

This furnace is design-certified for use with Natural Gas. It must be installed in accordance with the current National Fuel Gas Code (ANSI Z223.1/NFPA 54), local building codes, and the manufacturer's instructions. CSA International certified. For technical support or to locate a dealer, visit www.americanstandard.com or contact American Standard Heating & Air Conditioning at 1-800-526-2200.

Troubleshooting

Reset: If control board locks out (LED flashing error code), interrupt 120V power for 30 seconds to reset.

Service: For persistent issues, contact a qualified HVAC technician. 1-800-526-2200; www.americanstandard.com