Lennox G1D93BU User Manual

# 45466K003 Page 1
INSTALLATION INSTRUCTIONS
G1D91BU, G1D93BC, G1D93BU, CG90CB, & CG90UB
High Efficiency 90+ Condensing Gas Furnace
Manufactured By
A.A.C.
A Lennox International Company
421 Monroe Street
Bellevue, OH 44811
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 con-
sulted before installation is made. Such applicable regulations or requirements take precedence over the
general instructions in this manual.
IMPORTANT
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 cau-
tioned 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
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
Improper installation, adjustment, alteration, service, or maintenance can cause
injury or property damage. Refer to this manual. For assistance or additional informa-
tion, consult a qualified installer, service agency, or the gas supplier.
WARNING
TABLE OF CONTENTS
SAFETY ................................................. 2
INSTALLATION....................................... 3
START-UP ............................................ 19
OPERATION ........................................ 20
MAINTENANCE ................................... 23
REPAIR PARTS .................................... 24
CONTROL SYSTEM DIAGNOSTICS .. 25
WIRING DIAGRAMS ............................ 26
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Lennox G1D93BU Specifications

General

Brand	Lennox
Model	G1D93BU
Category	Furnace
Language	English

Summary

Safety Precautions

Installation Guidelines

Location Requirements

Guidance on selecting an appropriate installation site for the furnace.

Clearances for Installation

Specifies required distances from combustibles for furnace installation.

Combustion and Ventilation Air

Contaminated Combustion Air Risks

Venting System

Sidewall Vent Terminal Clearances (Direct Vented Furnaces)

Sidewall Vent Terminal Clearances (Non-Direct Vented Furnaces)

Upflow Direct Vent Installation

Upflow Non-Direct Vent Installation

Upflow Non-Direct Vertical Venting

Instructions for vertical venting of non-direct vent upflow models.

Upflow Non-Direct Horizontal Venting

Instructions for horizontal venting of non-direct vent upflow models.

Counterflow Direct Vent Installation

Counterflow Direct Vent Vertical Venting

Instructions for vertical venting of direct vent counterflow models.

Counterflow Direct Vent Horizontal Venting

Instructions for horizontal venting of direct vent counterflow models.

Counterflow Non-Direct Vent Installation

Counterflow Non-Direct Horizontal Venting

Instructions for horizontal venting of non-direct vent counterflow models.

Counterflow Non-Direct Vertical Venting

Instructions for vertical venting of non-direct vent counterflow models.

Circulating Air Supply and Duct Connections

Circulating Air Supply

Counterflow Duct Connections

Gas Supply and Piping Installation

Guidelines for installing gas supply piping according to codes and utility requirements.

Electrical Wiring

Filter Installation and Types

Additional Components and Connectors

Thermostat Installation

Guidelines for thermostat installation location and wiring.

Start-Up Procedures

Lighting Instructions and Safety

Safety warnings and procedures for lighting the furnace burners.

Furnace Operation

Sequence of Operation Explained

Detailed explanation of the furnace's heating, fan, and cooling operational cycles.

Furnace Control Components

Description of various control components and their functions within the furnace.

Gas Input Adjustment and Performance Checks

Checking and Adjusting Gas Input

Procedures for measuring and adjusting gas input for optimal performance.

Temperature Rise Adjustment

High Altitude Operation

Maintenance Procedures

Main Burner Inspection

Air Filter Maintenance

Condensate System Check

Repair Parts Availability

Control System Diagnostics

Troubleshooting Steps

Fault Code History Access