Goodman GM9S80-U Series

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SS-GM9S80-U www.goodmanmfg.com 10/21

Heating Input : 40,000 – 80,000 BTU/h

Single-Stage, Multi-Speed ECM,

Multi-Position, Ultra-Low NOx

Gas Furnace

80% AFUE

Standard Features Cabinet Features

• Heavy-duty stainless-steel dual-

diameter tubular heat exchanger

• Single-stage gas valve

• Durable Hot-surface igniter

• 

• 

• 

• 









• 

• 



• 

for gas and electrical service

• 



• Foil faced insulated heat exchanger

Contents

 2

 3

Dimensions 

 

Wiring Diagrams 8

Accessories 

Minimum Filter Sizes  

GM9S80-U

 





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The Goodman GM9S80-U is a single-stage, multi-speed ECM, multi-position, ultra-low NOx gas furnace designed for residential heating and air conditioning systems. It boasts an 80% AFUE (Annual Fuel Utilization Efficiency), indicating its energy efficiency in converting fuel to heat. The furnace is suitable for heating inputs ranging from 40,000 to 80,000 BTU/H.

Function Description:

The GM9S80-U operates as a central heating unit, utilizing natural gas to generate heat. It features a single-stage gas valve, meaning it operates at a consistent heat output when called upon. The multi-speed ECM (Electronically Commutated Motor) blower motor allows for variable airflow, which can be optimized for both heating and cooling cycles, contributing to improved comfort and efficiency. The multi-position design allows for flexible installation in upflow, horizontal left, or horizontal right configurations, making it adaptable to various home layouts. Its ultra-low NOx emission rating signifies its compliance with stringent environmental regulations, particularly in regions like California's South Coast Air Quality Management District (SCAQMD) and San Joaquin Valley Air Pollution Control District (SJVUAPCD), where it meets the 14 ng/J NOx emission limit.

Important Technical Specifications:

Heating Input: 40,000 – 80,000 BTU/H
AFUE: 80%
Gas Valve: Single-stage
Blower Motor: Multi-speed ECM
Heat Exchanger: Heavy-duty stainless-steel dual-diameter tubular
Ignition System: Durable hot-surface igniter
Draft Inducer: Quiet, modulating
Control Board: Self-diagnostic
NOx Emissions: Ultra-low, complying with 14 ng/J limit in SCAQMD Rule 1111 and SJVUAPCD Rule 4905.
Electrical Supply: 115 VAC, 60 Hz, single-phase
Gas Service Connection: ½" FPT
Available AC @ 0.5" ESP: Ranges from 3 to 5, depending on the model.
Temperature Rise Range (°F): Ranges from 20-50 to 35-65, depending on the model.
Circulator Blower Size (D x W): Available in 10" x 6", 10" x 8", and 10" x 10" configurations.
Horsepower: Ranges from 0.5 to 1 HP.
Vent Diameter: 4"
Number of Burners: Ranges from 2 to 4.
Minimum Circuit Ampacity: Ranges from 8.7 to 12.7.
Max. Overcurrent Device (amps): 15 amps for all models.
Ship Weight (LBS): Ranges from 86 to 116 lbs.
Cabinet Widths: Available in 14", 17½", and 21" (A, B, C cabinet widths).

Usage Features:

Multi-Position Installation: Can be installed in upflow, horizontal left, or horizontal right orientations, offering flexibility for different home designs and space constraints.
Convenient Connections: Designed with convenient left or right connections for gas and electrical service, simplifying installation.
Quiet Operation: Features a quiet, modulating draft inducer, contributing to a more peaceful indoor environment.
Environmental Compliance: Its ultra-low NOx rating makes it suitable for installation in environmentally sensitive areas, meeting specific air quality standards.
AHRI Certified; ETL Listed: These certifications ensure the product meets industry performance and safety standards.
Optional Accessories: Compatible with accessories such as the AFE18-60A Fossil Fuel (Dual Fuel) Kit and MVK-01 Masonry Vent Kit (for upflow applications only), enhancing its versatility.
Filter Compatibility: Supports various minimum filter sizes depending on the model and return configuration, with recommendations for larger filters for cooling units over 4 tons nominal capacity.

Maintenance Features:

Self-Diagnostic Control Board: Equipped with a self-diagnostic control board that can identify and display fault codes, aiding in quicker troubleshooting and maintenance. The manual provides a comprehensive list of status and fault codes for easy reference.
Durable Construction: Features a heavy-gauge steel cabinet with a durable baked-enamel finish, designed for longevity and resistance to wear. The foil-faced insulated heat exchanger further contributes to its durability and efficiency.
Warranty: The product comes with a Lifetime Heat Exchanger Limited Warranty (for as long as the original homeowner owns their home), a 2-Year Unit Replacement Limited Warranty, and a 10-Year Parts Limited Warranty. Online registration within 60 days of installation is required to activate these warranties, except in California or Quebec.
Serviceability: A 24" clearance for serviceability is recommended, ensuring easy access for maintenance and repairs.
Wiring Diagram: A detailed wiring diagram is provided in the manual, which is crucial for proper installation, troubleshooting, and maintenance by qualified technicians. It includes color codes for wiring and explanations for various components and connections.
Component Replacement: Emphasizes the use of manufacturer's specified replacement parts for servicing to maintain performance and safety standards.
Wire Specifications: Specifies that if any original wire is replaced, it must be with wiring material having a temperature rating of at least 105°C and copper conductors only.
Grounding: The unit must be permanently grounded and conform to National Electrical Code (N.E.C.) and local codes.

Goodman GM9S80-U Series Specifications

General

Stages	Single-Stage
Ignition Type	Hot Surface Ignition
Heat Exchanger	Aluminized Steel
Fuel Type	Natural Gas
Heating Capacity	40, 000 - 120, 000 BTU/h
Blower Motor Type	Multi-speed
Gas Valve Type	Single Stage
Warranty	Lifetime Heat Exchanger Limited Warranty