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Goodman GMS80805C A Series User Manual

Goodman GMS80805C A Series
17 pages
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RT6622014r3
November 2013
This manual is to be used by qualified, professionally trained HVAC technicians
only. Goodman does not assume any responsibility for property damage or
personal injury due to improper service procedures performed by an unqualified
person.
Refer to Service Manual RS6612006for troubleshooting information.
All safety information must be followed as provided in the Service Manual.
Refer to the appropriate Parts Catalog for part number information.
Model numbers listed on page 3.
GMS8 33-3/8" 80% Gas Furnace Units
80% AFUE, Single Stage,
Multi-Speed, Upflow Horizontal
TECHNICAL MANUTECHNICAL MANU
TECHNICAL MANUTECHNICAL MANU
TECHNICAL MANU
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Copyright © 2011, 2013 Goodman Manufacturing Company, L.P.
C US
®
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Goodman GMS80805C A Series Specifications

General IconGeneral
BrandGoodman
ModelGMS80805C
SeriesA Series
CategoryFurnace
TypeGas
Heating Capacity80, 000 BTU
Efficiency Rating80% AFUE
Input BTU80, 000 BTU
Output BTU64, 000 BTU
Blower MotorMulti-speed
Fuel TypeNatural Gas
Installation TypeUpflow
Heat Exchanger WarrantyLimited Lifetime
Parts Warranty10 Years
StagesSingle Stage

Summary

Goodman TECHNICAL MANUAL

GMS8 Furnace Model Overview

Identifies the GMS8 furnace series and its key features like AFUE and stage.

Service and Parts Information Guidance

Directs users to service manuals and parts catalogs for further information.

PRODUCT IDENTIFICATION

Model and Manufacturing Number Usage

Explains how model and manufacturing numbers are used for parts identification.

Critical Safety Warnings and Disclaimers

Highlights high voltage hazards, technician qualifications, and liability disclaimers.

PRODUCT IDENTIFICATION DETAILS

GMS8 Model Number Listing

Lists various GMS8 furnace model numbers, including gas type availability.

Environmental and Appliance Usage Warnings

Covers EPA regulations and warnings against using uncertified devices or storing flammables.

PRODUCT DESIGN & OPERATION

General Furnace Operation and Features

Describes the electronic ignition, interlock switch, and diagnostic module of the GMS8 furnace.

Installation Location and Clearance Requirements

Provides guidance on furnace placement, floor protection, and minimum service clearances.

High Altitude Performance Adjustments

Explains derating requirements and potential adjustments for installations above 4500 feet.

Critical Venting Safety Requirement

Emphasizes the mandatory use of Category I venting to prevent asphyxiation.

COMPONENT IDENTIFICATION

Major Internal Components of GMS8 Furnace

Identifies key components like heat exchanger, blower, gas valve, and control module.

PRODUCT DIMENSIONS

GMS8 Furnace Dimensional Data Table

Provides a table with dimensions (A and B) for various GMS8 furnace models.

PRODUCT DESIGN SPECIFICATIONS (GMS8***A*)

Pressure Switch and Limit Control Settings

Details trip points for pressure switches and settings for primary, rollout, and auxiliary limits.

PRODUCT DESIGN SPECIFICATIONS (GMS8***B*)

Pressure Switch and Limit Control Settings

Details trip points for pressure switches and settings for primary, rollout, and auxiliary limits.

PRODUCT DESIGN - COIL MATCHES

Amana Coil Compatibility for GMS8 Furnaces

Information on matching Amana coils with GMS8 furnaces, covering types, finishes, and refrigerants.

Coil Capacity and Furnace Width Matching

Details on nominal capacity ranges and furnace cabinet width compatibility for coils.

PRODUCT DESIGN - THERMOSTATS & FILTERS

Thermostat and Filter Recommendations

Advises on thermostat types and specifies filter requirements and types.

Filter Area Requirements for Airflow

Provides tables for determining minimum filter area based on airflow and filter type.

FURNACE SPECIFICATIONS (GMS8***A*)

Model and Performance Data

Lists BTU input/output, AFUE, static pressure, temperature rise, and blower specs.

Electrical, Safety, and Gas Specifications

Covers power supply, ampacity, limit settings, gas pressure, and manifold pressure.

FURNACE SPECIFICATIONS (GMS8***B*)

Model and Performance Data

Lists BTU input/output, AFUE, static pressure, temperature rise, and blower specs.

Electrical, Safety, and Gas Specifications

Covers power supply, ampacity, limit settings, gas pressure, and manifold pressure.

BLOWER PERFORMANCE SPECIFICATIONS (GMS8***A*)

Blower CFM and Temperature Rise Charts

Provides detailed charts of CFM and temperature rise versus external static pressure for GMS8***A* models.

Blower Performance Notes and Guidelines

Includes important notes on filter usage, speed adjustment, and altitude effects on performance.

BLOWER PERFORMANCE SPECIFICATIONS (GMS8***B*)

Blower CFM and Temperature Rise Charts

Provides detailed charts of CFM and temperature rise versus external static pressure for GMS8***B* models.

Blower Performance Notes and Guidelines

Includes important notes on filter usage, speed adjustment, and altitude effects on performance.

BLOWER PERFORMANCE CHARTS

BTU Output vs. Temperature Rise Chart

A graphical tool to determine BTU output based on temperature rise.

Blower Performance Calculation Formulas

Key formulas for calculating BTU output and temperature rise from CFM and RISE.

WIRING DIAGRAMS

GMS8 Furnace Wiring Diagram Overview

Illustrates the internal wiring connections for the GMS8 furnace.

Critical Wiring Safety Precautions and Notes

Emphasizes high voltage safety, proper grounding, and replacement part requirements.

SCHEMATICS

GMS8 Integrated Ignition Control Schematic

Provides a typical schematic of the integrated ignition control system for GMS8 furnaces.

High Voltage Safety and Schematic Notes

Reinforces high voltage warnings and provides notes on schematic interpretation.

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