Lennox G23 Series User Manual

G23
SERIES

PRODUCT LITERATURE
W1996 Lennox Industries Inc.
Litho U.S.A.
503,517M
9/98
Supersedes 8/96
WHAT TO DO IF YOU SMELL GAS:
If the information in this manual is not followed
exactly, a fire or explosion may result causing
property damage, personal injury or loss of
life.
WARNING
D Do not try to light any appliance.
D Do not touch any electrical switch; do not use any
phone in your building.
D Immediately call your gas supplier from a neighbor's
phone. Follow the gas supplier's instructions.
D If you cannot reach your gas supplier, call the fire deĆ
partment.
Dallas, Texas
D Extinguish any open flames.
GAS FURNACE
Do not store or use gasoline or other flamĆ
mable vapors and liquids in the vicinity of
this or any other appliance.
Installation and service must be performed by
a qualified installer, service agency or the gas
supplier.

Lennox G23 Series Specifications

General

Model	G23 Series
Fuel Type	Natural Gas
Efficiency Rating	Up to 80% AFUE
Blower Type	Multi-speed
Stages	Single-Stage
Ignition System	Hot Surface Ignition
Vent Type	Natural Draft
Ventilation	Natural draft
Warranty	Limited lifetime heat exchanger warranty, 5-year parts warranty

Summary

Lennox G23 Series Gas Furnace User Manual

Critical Safety Warning: Fire and Explosion Risk

Emphasizes that failure to follow manual instructions can result in fire, explosion, property damage, injury, or death.

Gas Leak Detection and Emergency Response

Provides essential steps to take if a gas leak is detected, including immediate actions and contact procedures.

Furnace Components and Safety Advisories

Hazard Warning: Fiberglass Wool Exposure

Alerts users to the risks of fiberglass wool dust during installation or maintenance, including health effects.

Thermostat Setting and Warranty Warning

Overheating and Gas Shutoff Procedure

Instructs on shutting off the manual gas valve if overheating occurs or gas supply fails to shut off.

Operational Safety and Maintenance

Service and Modification Safety Guidelines

Essential Installation and Operation Directives

Carbon Monoxide Hazard and Prevention

Explains the dangers of carbon monoxide and recommends detectors, even for homes without gas appliances.

Service Reminders and Planned Inspections

Critical Safety Precautions and CO Symptoms

Advises on recognizing potential malfunctions, unusual odors, and carbon monoxide poisoning symptoms.

Planned Annual Furnace Inspection Items