GMS8, GDS8 and GHS8 - Gas Fired Warm Air Furnace Single Stage - Installation & Operating Instructions

Oct 22, 2026

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Installation & operating instructions for GMS8, GDS8 and GHS8 gas fired warm air furnaces (single stage, Category 1). The manual outlines applicable safety precautions for installing personnel, including recognition of safety symbols, responsibility for safe installation and customer instruction, and supplemental precaution hierarchy. It covers transportation damage, electrostatic discharge precautions, product application, site location requirements, clearances, thermostat placement, combustion/ventilation air requirements, Category I vertical venting, and exterior masonry chimney checks with a checklist summary and completion fixes.

LanguageEnglish

CategoryTechnology

FormatPDF

Pages32

Reading Time1 h 21 min

AccessFree to download

TO THE OWNER

TO THE INSTALLER

TRANSPORTATION DAMAGE

II. SAFETY

ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS

III. PRODUCT APPLICATION

IV. LOCATION REQUIREMENTS AND CONSIDERATIONS

GENERAL

CLEARANCES AND ACCESSIBILITY

HORIZONTAL INSTALLATION

FURNACE SUSPENSION

EXISTING FURNACE REMOVAL

THERMOSTAT LOCATION

V. COMBUSTION AND VENTILATION AIR REQUIREMENTS

VI. CATEGORY I VENTING (VERTICAL VENTING)

VII. EXTERIOR MASONRY CHIMNEYS

CHECKLIST SUMMARY

CHECK 1 -PROPER CHIMNEY TERMINATION

CHECK 2-ANY SOLID OR LIQUID FUEL APPLIANCES VENTED INTO THIS CHIMNEY CHANNEL

CHECK 3-CHIMNEY CROWN CONDITION

CHECK 4-DEBRIS IN CLEANOUT

CHECK 5-LINER CONDITION

CHECK 6-DILUTION AIR

CHECK 7-COMPLETE THE INSTALLATION

FIX 1-LINER TERMINATION

FIX 2-CHANGE VENTING ARRANGEMENTS

FIX 3-REBUILD THE CROWN

FIX 4-RELINING

VIII. ELECTRICAL CONNECTIONS

These furnaces comply with requirements embodied in the American National Standard / National Standard of Canada ANSI Z21 .47􀂷CSA-2 .3 Gas Fired Central Furnaces. Æ C US INSTALLATION & OPERATING INSTRUCTIONS for GMS8, GDS8 and GHS8 GAS FIRED WARM AIR FURNACE SINGLE STAGE (CATEGORY 1) RECOGNIZE THIS SYMBOL AS A SAFETY PRECAUTION. | ATTENTION INSTALLING PERSONNEL | | | --- | --- | | As a professional installer you have an obligation to know the product better than the customer. This includes all
safety precautions and related items.
Prior to actual installation, thoroughly familiarize yourself with this Instruction Manual. Pay special attention to all safety warnings. Often during installation or repair it is possible to place yourself in a position which is more
hazardous than when the unit is in operation.
Remember, it is your responsibility to install the product safely and to know it well enough to be able to instruct a
customer in its safe use.
Safety is a matter of common sense...a matter of thinking before acting. Most dealers have a list of specific good
safety practices...follow them.
The precautions listed in this Installation Manual are intended as supplemental to existing practices. However, if there is a direct conflict between existing practices and the content of this manual, the precautions listed here take
precedence. | | | | | *NOTE: Please contact your distributor or our website for the applicable product data book referred to in this manual. IO-242D © 2004-2006 Goodman Manufacturing Company, L. P. 2/06 Table of Contents TO THE OWNER .............................................................................................................................................. 4 TO THE INSTALLER .......................................................................................................................................... 4 TRANSPORTATION DAMAGE ................................................................................................................................ 4 II. SAFETY ........................................................................................................................................................................... 4 ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS ................................................................................................. 5 III. PRODUCT APPLICATION ............................................................................................................................................... 5 IV. LOCATION REQUIREMENTS AND CONSIDERATIONS.................................................................................................. 6 GENERAL ....................................................................................................................................................... 6 CLEARANCES AND ACCESSIBILITY ........................................................................................................................ 7 HORIZONTAL INSTALLATION .................................................................................................................................. 7 FURNACE SUSPENSION ...................................................................................................................................... 7 EXISTING FURNACE REMOVAL ............................................................................................................................ 7 THERMOSTAT LOCATION ..................................................................................................................................... 8 V. COMBUSTION AND VENTILATION AIR REQUIREMENTS .............................................................................................. 8 VI. CATEGORY I VENTING (VERTICAL VENTING) ............................................................................................................ 10 VII.

FAQs

What safety responsibilities are emphasized for installing personnel?

Installers must know the product better than the customer and thoroughly review the instruction manual before installation. The manual stresses paying special attention to safety warnings and following listed good safety practices.

What electrostatic discharge (ESD) precautions are included?

The manual includes a dedicated ESD precautions section under the Safety chapter to help protect equipment during installation and handling.

What does the Category I vertical venting and masonry chimney checklist cover?

It provides a checklist for proper chimney termination, verifying any solid or liquid fuel appliances vented into the chimney channel, chimney crown condition, debris in cleanout, liner condition, dilution air, and completion of the installation, along with corrective fixes like liner termination and relining.

Oct 22, 2026

Upload by Rhys