To Next PageTo Next Page
Need help?Do you have a question about the Goodman GMS80603A A Series and is the answer not in the manual?
Identifies the GMS8 furnace model series, efficiency, stage, speed, and airflow configuration.
Points to the Service Manual RS6612006 for detailed troubleshooting procedures.
Emphasizes the critical need to adhere to all safety information within the Service Manual.
Directs users to the Parts Catalog for obtaining specific part numbers.
Informs users that model numbers are detailed on page 3 of this manual.
Explains the importance of model and manufacturing numbers for identifying component parts.
Details the alphanumeric structure of the GMS8 model numbers and their component meanings.
Critical safety warning regarding high voltage and the necessity to disconnect power before servicing.
States Goodman's non-responsibility for damages from improper service procedures by unqualified personnel.
Specifies that installation and repair must be performed by qualified individuals meeting AHRI standards.
Provides a comprehensive list of GMS8 furnace model numbers, including variations.
Notes that specific models are available for Natural Gas and Low NOx applications.
Alerts users about EPA regulations concerning refrigerant handling and disposal.
Warns against using non-certified devices, which can cause damage, injury, or hazardous conditions.
Advises against storing combustible materials or using flammable liquids near the appliance.
Describes the furnace's electronic ignition, induced draft blower, and interlock switch features.
Explains the self-diagnosing control module and its LED indicator for problem identification.
Stresses the need to calculate heating capacity based on ASHRAE or Manual J-Load Calculations.
Provides guidance on furnace placement relative to air distribution and installation on surfaces.
Details requirements for installing the furnace in a residential garage, including clearance.
Mandates Category I venting for preventing asphyxiation and warns against Category III venting.
Specifies minimum clearances required for servicing the furnace, especially front access.
Explains derating requirements for altitudes above 4500 feet, including potential kit needs.
Lists and labels major furnace components for identification in upflow/horizontal configurations.
Presents front, side, and top-view dimensions for the GMS8 furnace models.
Provides a table correlating GMS8 models with their specific cabinet dimensions (A and B).
Lists pressure switch trip points and corresponding part numbers for GMS8***A* models.
Details primary limit settings and part numbers for various GMS8***A* furnace models.
Specifies open settings and part numbers for rollout limit switches in GMS8***A* models.
Lists part numbers and open settings for auxiliary limit switches in GMS8***A* models.
Details pressure switch trip points and part numbers for GMS8***B* furnace models.
Specifies primary limit settings and part numbers for GMS8***B* furnace models.
Lists part numbers and open settings for rollout limit switches in GMS8***B* models.
Provides part numbers and open settings for auxiliary limit switches in GMS8***B* models.
Details compatible Amana® brand indoor coils for GMS8 furnaces using R22 and R-410A.
Explains the coding for coil matches, including product type, expansion device, and finish.
Specifies the types of refrigerant charges (R-410A, R-22) used with GMS8 furnaces.
Correlates cabinet widths of GMS8 furnaces with compatible furnace cabinet sizes.
Lists the nominal cooling capacity range in tons for GMS8 furnaces based on SEER rating.
Recommends using single-stage, non-power robbing thermostats for GMS8 furnaces.
States filter requirements, compliance with UL900/CAN/ULCS111 standards, and warranty implications.
Provides side and bottom return filter sizes, flow areas, and cabinet widths for upflow configurations.
Details required airflow (CFM) for upflow cooling based on model and input airflow.
Specifies required airflow (CFM) for counterflow cooling based on model and input airflow.
Provides calculations for disposable filter area based on filter face velocity.
Offers calculations for permanent filter area based on filter face velocity.
Presents detailed technical specifications for GMS8***A* models across various parameters.
Lists the British Thermal Units (Btuh) input and output for GMS8 furnaces in high fire operation.
Details rated external static pressure and temperature rise ranges for GMS8 models.
Specifies blower wheel dimensions and horsepower ratings for different GMS8 furnace models.
Lists maximum Cubic Feet per Minute (CFM) and power supply requirements for GMS8 furnaces.
Provides the Minimum Circuit Ampacity (MCA) required for GMS8 furnace installations.
Details the temperature settings for primary, auxiliary, and rollout limit controls.
Specifies gas supply and manifold pressure requirements for natural/propane gas.
Lists the orifice sizes and the number of burners for each GMS8 furnace model.
Indicates the vent connector diameter and shipping weight for GMS8 furnace models.
Notes derating requirements for elevations above 2000 ft. and potential need for orifice changes.
Emphasizes calculating total heat loss according to ASHRAE or Manual J-Load Calculations.
Explains the formula for calculating Minimum Circuit Ampacity based on blower amps.
Presents detailed technical specifications for GMS8***B* models across various parameters.
Lists the British Thermal Units (Btuh) input and output for GMS8 furnaces in high fire operation.
Details rated external static pressure and temperature rise ranges for GMS8 models.
Specifies blower wheel dimensions and horsepower ratings for different GMS8 furnace models.
Lists maximum Cubic Feet per Minute (CFM) and power supply requirements for GMS8 furnaces.
Provides the Minimum Circuit Ampacity (MCA) required for GMS8 furnace installations.
Details the temperature settings for primary, auxiliary, and rollout limit controls.
Specifies gas supply and manifold pressure requirements for natural/propane gas.
Lists the orifice sizes and the number of burners for each GMS8 furnace model.
Indicates the vent connector diameter and shipping weight for GMS8 furnace models.
Notes derating requirements for elevations above 2000 ft. and potential need for orifice changes.
Emphasizes calculating total heat loss according to ASHRAE or Manual J-Load Calculations.
Explains the formula for calculating Minimum Circuit Ampacity based on blower amps.
Presents blower performance data (CFM, Temperature Rise) versus external static pressure for GMS8***A* models.
Provides notes on blower installation, filter usage, speed adjustment, and altitude effects on performance.
Includes formulas for calculating BTU Output and Temperature Rise based on CFM and output.
Presents blower performance data (CFM, Temperature Rise) versus external static pressure for GMS8***B* models.
Provides notes on blower installation, filter usage, speed adjustment, and altitude effects on performance.
Graphical representation of BTU Output versus Temperature Rise for various CFM values.
Provides essential formulas for calculating BTU Output and Temperature Rise from CFM and output.
Illustrates the complete electrical wiring connections for the GMS8 furnace system.
Provides crucial notes on wiring, color codes, and recommended practices for GMS8 furnace wiring.
Emphasizes the danger of high voltage and the necessity of disconnecting power before servicing.
Presents a typical schematic of the integrated ignition control system for GMS8 furnaces.
Highlights the extreme danger of high voltage and the requirement to disconnect power before work.
Shows the typical wiring connections for the thermostat to the GMS8 furnace control system.
The Goodman GMS8 33-3/8" 80% Gas Furnace Units are designed for residential heating applications, offering 80% AFUE (Annual Fuel Utilization Efficiency), single-stage operation, and multi-speed capabilities for upflow and horizontal installations. These units are equipped with an electronic ignition device for burner lighting and an induced draft blower to exhaust combustion products, ensuring efficient and safe operation.
The GMS8 furnace operates by igniting natural gas (or propane with an optional kit) to heat air, which is then circulated throughout the building by a multi-speed blower. The induced draft blower ensures proper exhaust of combustion gases. An electronic control module manages the furnace's operations and includes a self-diagnosing feature that flashes an LED to indicate problems, aiding in troubleshooting. An interlock switch prevents operation if the inner blower door is not properly in place, enhancing safety. The furnace is designed for use with a single-stage, non-power robbing thermostat.
Model Variations (GMS8A):**
Model Variations (GMS8B):**
General