Introduction
This manual provides essential information for the safe and efficient operation, installation, and maintenance of your Goodman GR9S80 Gas Furnace. Please read this manual thoroughly before attempting to install, operate, or service the unit. Retain this manual for future reference.
The Goodman GR9S80 Gas Furnace is designed to provide reliable heating with up to 80% AFUE (Annual Fuel Utilization Efficiency), converting 80% of fuel into heat. This single-stage furnace delivers consistent warmth and features a multi-speed ECM motor for optimized airflow, energy consumption, and reduced noise.
Safety Information
WARNING: Improper installation, adjustment, alteration, service, or maintenance can cause property damage, personal injury, or death. Refer to this manual. For assistance or additional information, consult a qualified installer, service agency, or the gas supplier.
IMPORTANT: This appliance must be installed in accordance with all local codes, or in the absence of local codes, with the National Fuel Gas Code ANSI Z223.1/NFPA 54, and the National Electrical Code ANSI/NFPA 70.
- Always turn off the electrical power and gas supply to the furnace before performing any service or maintenance.
- Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance.
- Ensure proper ventilation and combustion air supply.
Product Overview
Figure 1: Front view of the Goodman GR9S80 Gas Furnace, showcasing its compact design and the Goodman branding.
Figure 2: Angled view of the Goodman GR9S80 Gas Furnace, highlighting its side panels and overall structure.
Figure 3: Top internal view of the Goodman GR9S80 Gas Furnace, showing the heat exchanger tubes and internal components.
Figure 4: Another top internal view of the Goodman GR9S80 Gas Furnace, providing a clearer look at the heat exchanger assembly.
Figure 5: Direct top-down view of the Goodman GR9S80 Gas Furnace's heat exchanger, showing the arrangement of the tubes.
Figure 6: The Goodman GR9S80 Gas Furnace configured for horizontal installation, demonstrating its adaptable design.
Figure 7: The U.S. Government EnergyGuide label for the Goodman GR9S800804BN furnace, indicating an 80.0 AFUE efficiency rating.
Setup and Installation
The Goodman GR9S80 furnace is designed for flexible installation in either an upflow or horizontal configuration. Proper installation is critical for safe and efficient operation. Installation must be performed by a qualified HVAC technician in accordance with all national and local codes.
Key Installation Considerations:
- Location: Ensure the furnace is installed in a location that allows for proper clearances, combustion air, and access for maintenance.
- Venting: This model uses metal venting. Proper venting is essential to safely exhaust combustion byproducts.
- Gas Supply: Connect to the appropriate gas supply (Natural Gas or Propane with a conversion kit, if applicable) following all safety standards.
- Electrical Connections: Connect to a 115V electrical supply. All wiring must comply with local and national electrical codes.
- Ductwork: Ensure ductwork is properly sized and sealed for efficient air distribution.
- Condensate Drain: Although this is an 80% AFUE furnace, proper condensate drainage should be considered for certain installation scenarios or if paired with an AC coil.
Accessories such as LP kits, linesets, and other components are sold separately, allowing for customization based on specific installation requirements.
Operating Instructions
The Goodman GR9S80 furnace operates as a single-stage unit, providing consistent heat output. Its multi-speed ECM motor adjusts airflow to maintain comfort and optimize energy use.
Starting the Furnace:
- Ensure the gas supply valve to the furnace is open.
- Turn on the electrical power to the furnace.
- Set your thermostat to the "Heat" mode and adjust the temperature setting above the current room temperature.
- The furnace will initiate its start-up sequence, which typically includes a pre-purge cycle, ignition, and then the main burner firing.
- Once the heat exchanger is warm, the blower motor will activate, distributing warm air through the ductwork.
Stopping the Furnace:
- To temporarily stop heating, lower the thermostat setting below the current room temperature or switch the thermostat to "Off" mode.
- For extended shutdowns or maintenance, turn off the electrical power and close the gas supply valve to the furnace.
Maintenance
Regular maintenance is essential for the longevity and efficient operation of your furnace. It is recommended to have your furnace inspected and serviced annually by a qualified HVAC technician.
User Maintenance:
- Air Filter Replacement: Check and replace the air filter monthly, or more frequently if you have pets or allergies. A dirty filter restricts airflow and reduces efficiency.
- Clear Area Around Furnace: Ensure the area around the furnace is clear of obstructions, combustible materials, and debris to allow for proper airflow and safe operation.
Professional Maintenance (Annual):
- Inspection of heat exchanger for cracks or corrosion.
- Cleaning of burners and ignition system.
- Checking and adjusting gas pressure.
- Lubrication of moving parts (if applicable).
- Testing of safety controls and thermostat.
- Inspection of flue pipe for blockages or leaks.
- Verification of proper airflow and temperature rise.
Troubleshooting
Before calling for service, review the following common issues and their potential solutions. Always ensure power and gas are off before inspecting any internal components.
| Problem | Possible Cause | Solution |
|---|---|---|
| Furnace not heating |
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| Insufficient heat |
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| Furnace cycles on and off frequently (short cycling) |
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| Unusual noises |
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If these steps do not resolve the issue, contact a qualified HVAC service technician.
Specifications
| Feature | Detail |
|---|---|
| Model Number | GR9S800804BN |
| Brand | Goodman |
| BTUs | 80,000 |
| AFUE | 80% |
| Orientation | Upflow / Horizontal |
| Venting Type | Metal |
| Height | 33 3/8 inches (33.38 IN) |
| Width | 17 1/2 inches (17.5 IN) |
| Depth | 28 inches (28 IN) |
| Weight | 120 LBs (Shipping weight: 170 pounds) |
| Volts | 115V |
| Motor Speed | Multi-Speed ECM |
| Gas Valve | Single-stage |
| Installation Type | Split System |
Warranty and Support
This Goodman GR9S800804BN Gas Furnace comes with a Limited Warranty. Specific warranty terms and conditions are provided with the product documentation at the time of purchase. Please refer to your warranty certificate for details regarding coverage, duration, and claims procedures.
For technical support, service, or warranty inquiries, please contact your installing dealer or a qualified Goodman service provider. You can also visit the official Goodman website for further information and to locate authorized service centers.
