# 45465K005 Page 1
INSTALLATION INSTRUCTIONS
This furnace is not approved for installation in
a mobile home. Do not install this furnace in a
mobile home. Installation in a mobile home
could result in actions that could cause prop-
erty damage, personal injury, or death.
WARNING
Manufactured By
A.A.C.
A Lennox International Inc. Company
421 Monroe Street
Bellevue, OH 44811
TABLE OF CONTENTS
SAFETY ................................................. 2
INSTALLATION....................................... 3
START-UP ............................................ 19
OPERATION ........................................ 20
MAINTENANCE ................................... 25
CONTROL DIAGNOSTICS .................. 26
REPAIR PARTS .................................... 27
WIRING DIAGRAMS ............................ 28
Do not store combustible materials, including
gasoline and other flammable vapors and
liquids, near the furnace, vent pipe, or warm air
ducts. The homeowner should be cautioned that
the furnace area must not be used as a broom
closet or for any other storage purposes. Such
uses may result in actions that could cause
property damage, personal injury, or death.
WARNING
Improper installation, adjustment, alteration, service, or maintenance can cause injury or
property damage. Refer to this manual. For assistance or additional information, consult
a qualified installer, service agency, or the gas supplier.
WARNING
The installation of the furnace, wiring, warm air ducts, venting, etc. must conform to the requirements of the
National Fire Protection Association; the National Fuel Gas Code, ANSI Z223.1/NFPA No. 54 (latest edition) and
the National Electrical Code, ANSI/NFPA No. 70 (latest edition) in the United States; CSA B149.1 (latest edition)
Natural Gas and Propane Installation Codes and the Canadian Electrical Code Part 1, CSA 22.1 (latest edition)
in Canada; and any state or provincial laws, local ordinances (including plumbing or wastewater codes), or local
gas utility requirements. Local authorities having jurisdiction should be consulted before installation is made.
Such applicable regulations or requirements take precedence over the general instructions in this manual.
IMPORTANT
Save these instructions for future reference
G1D80BT, G1D80BR, G2D80CT, & G2D80CR
80% Gas Furnace
with System Sentry™ Control System
*45465K005*
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