American Standard HVAC Odyssey TTA1804 C Manual

The American Standard Odyssey TTA1804 C is a high-efficiency, variable-speed air conditioning and heat pump system designed for residential use. It features advanced humidity control, quiet operation, compatibility with communicating thermostats, durable construction, and meets ENERGY STAR® requirements. Below are key sections for safety, features, installation, setup, operation, maintenance, and troubleshooting.

1. Features at a Glance 2. Installation Requirements 3. First-Time Setup & Commissioning 4. Technical Specifications 5. System Controls & Settings 6. Connecting to Thermostats & Accessories 7. Operating Modes & Sequences 8. Maintenance & Service 9. Care & Cleaning 10. Regulatory & Warranty Information 11. Troubleshooting Guide

Features at a Glance

Key components: Outdoor condensing unit with variable-speed compressor, communicating control board, refrigerant lines, electrical connections, and service ports.

Feature	Description
Variable-Speed Compressor	Provides precise temperature and humidity control with quiet operation
Communicating System	Compatible with American Standard AccuLink™ thermostats for enhanced diagnostics
High SEER Rating	Exceeds 18 SEER for superior energy efficiency
Sound Insulation	Heavy-duty cabinet with sound-dampening materials
Corrosion Protection	WeatherGuard™ finish on coil and cabinet
Refrigerant	Uses R-410A environmentally friendly refrigerant
Service Ports	Quick-connect access for pressure gauges
Diagnostic LEDs	On-board status lights for troubleshooting
Demand Defrost	Optimizes heat pump operation in cold weather
Electrical Disconnect	Required field-installed safety switch

Installation Requirements

Unpack and inspect unit for shipping damage. Select appropriate location with proper clearances.

Foundation: Install on level, stable pad (concrete or composite) with minimum 24" clearance on all sides.
Electrical: Connect to dedicated circuit with proper amperage (see specifications). Install disconnect within sight of unit.
Refrigerant Lines: Connect pre-charged linesets using proper brazing techniques and nitrogen purge.
Condensate Drain: Ensure proper drainage from indoor unit to prevent water damage.
Thermostat Wiring: Run 18-8 communicating cable between indoor and outdoor units.

WARNING! Installation must be performed by qualified HVAC technician. Follow all local codes and refrigerant handling regulations.

First-Time Setup & Commissioning

Power on system; follow startup procedure with communicating thermostat.

System Check: Verify all electrical connections are tight and refrigerant charge is correct.
Thermostat Configuration: Set system type (heat pump), configure stages, and enable desired features.
Test Modes: Run cooling and heating tests to verify proper operation and airflow.
Commissioning: Use service tool to verify refrigerant charge, superheat/subcooling, and system pressures.
Customer Orientation: Demonstrate thermostat operation and explain maintenance requirements.

CAUTION! Never operate system without proper refrigerant charge or with restricted airflow.

Technical Specifications

Model: TTA1804 C
Type: Variable-Speed Air Conditioner/Heat Pump
Cooling Capacity: 3-5 Tons (36,000-60,000 BTU/H)
SEER Rating: Up to 18.5
HSPF Rating: Up to 10.0
Refrigerant: R-410A
Electrical: 208/230V, 60Hz, 1-Phase
Operating Range: Cooling: 55°F to 115°F; Heating: -5°F to 75°F
Sound Rating: As low as 72 dB
Dimensions: 35" H x 31" W x 31" D (approximate)
Warranty: 10-Year Compressor, 5-Year Parts Limited Warranty

System Controls & Settings

Primary control through communicating thermostat. Outdoor unit has diagnostic board with status LEDs.

Thermostat Features: System mode (Cool/Heat/Auto/Emergency Heat/Fan), Temperature setpoints, Fan control (Auto/On), Humidity control, Scheduling, Alerts, System status.

Outdoor Unit LEDs: Power (steady green), Communication (flashing green), Fault codes (red flashes).

Configuration Settings: Compressor minimum/maximum speeds, Defrost intervals, Fan delays, Temperature limits, Communication addresses (for zoning).

Connecting to Thermostats & Accessories

Compatible with AccuLink™ 850 series thermostats. Supports zoning with dampers and zone panels.

Turn off power at disconnect before making any connections.
Connect communicating cable: Use 8-conductor 18-gauge shielded cable between indoor and outdoor units.
Thermostat connection: Follow wiring diagram for AccuLink terminal designations.
Accessory integration: Connect humidifiers, dehumidifiers, or air cleaners to indoor unit control board.
Zoning setup: Configure zone panel addresses and damper end switches.

Tip: Use shielded cable and proper grounding to prevent communication interference.

Operating Modes & Sequences

System automatically adjusts capacity based on temperature demand and humidity levels.

Cooling Mode: Compressor ramps up/down to maintain setpoint; fan speed adjusts for humidity removal.
Heating Mode: Heat pump operation with automatic defrost cycle when needed.
Emergency Heat: Uses backup heat strips when outdoor temperature is too low for heat pump efficiency.
Fan Only: Circulates air without heating or cooling.
Auto Mode: Automatically switches between heating and cooling based on indoor temperature.
Dehumidify Mode: Enhanced moisture removal during cooling operation.
Smart Recovery: Learns system performance to reach setpoints at scheduled times.

WARNING! Do not switch between heating and cooling modes rapidly; allow 5-minute delay.

Maintenance & Service

Regular maintenance required for optimal performance and warranty compliance.

Interval	Task
Monthly	Check/clean air filters in indoor unit
Seasonal	Inspect outdoor coil for debris; clean if necessary
Annually	Professional inspection: Check refrigerant charge, electrical connections, condensate drain, and system pressures
As Needed	Clear vegetation around outdoor unit (maintain 24" clearance)

Professional Service Includes: Refrigerant level check, Compressor amp draw, Coil cleaning, Control board diagnostics, Safety checks.

Care & Cleaning

Turn off power before cleaning. Keep outdoor unit clear of debris.

Outdoor Coil: Gently clean with soft brush or low-pressure water spray (do not use high pressure).
Cabinet: Wipe with damp cloth; mild detergent if needed.
Indoor Unit: Replace filters regularly; professional cleaning of evaporator coil and drain pan annually.
Condensate Drain: Flush with water/vinegar solution to prevent algae growth.

CAUTION! Do not use harsh chemicals or pressure washers on coils. Never operate with dirty filter.

Regulatory & Warranty Information

UL Listed; meets applicable ANSI/ASHRAE standards. EPA Section 608 certified technicians required for refrigerant service. Registered warranty required within 60 days of installation. Copyright © American Standard Heating & Air Conditioning. For support, visit www.americanstandardair.com or contact 1-800-228-2962. Keep original receipt and installation date for warranty claims.

Troubleshooting Guide

Symptom	Possible Cause	Corrective Action
System not turning on	Power disconnect, blown fuse, thermostat issue	Check disconnect switch; verify circuit breaker; check thermostat batteries/settings.
Poor cooling/heating	Dirty filter, low refrigerant, restricted airflow	Replace filter; call for professional service to check charge and ductwork.
Unusual noises	Loose parts, debris in fan, compressor issue	Turn off system; check for obstructions; call for service if noise persists.
Ice on coils	Low airflow, low refrigerant, dirty coil	Turn system off; check filter; call for service to diagnose refrigerant issue.
Thermostat not communicating	Wiring issue, power loss, faulty thermostat	Check wiring connections; reset thermostat; consult installation manual.
Frequent cycling	Oversized unit, thermostat location, dirty sensor	Check thermostat location (away from heat sources); call for system evaluation.

LED Fault Codes: 1 flash = Communication error; 2 flashes = High pressure; 3 flashes = Low pressure; 4 flashes = Compressor fault; 5 flashes = Fan motor fault.

Service: 1-800-228-2962; www.americanstandardair.com