Lennox G20 Series User Manual

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PRODUCT LITERATURE
Litho U.S.A.
502,754M
9/98
Supersedes 4/95
¤ 1992 Lennox Industries Inc.
Dallas, Texas
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Installation and service must be per-
formed by a qualified installer, ser-
vice agency or the gas supplier.
- Do not try to light any appliance.
- Do not touch any electrical switch; do not
use any phone in your building.
- Immediately call your gas supplier from a
neighbor’s phone. Follow the gas supplier’s
instructions.
- If you cannot reach your gas supplier, call
the fire department.
- Extinguish any open flames.
Do not store or use gasoline or other
flammable vapors and liquids in the
vicinity of this or any other appliance.
If the information in this manual is not
followed exactly, a fire or explosion
may result causing property damage,
personal injury, or death.
:$51,1*

Lennox G20 Series Specifications

General

Model	G20 Series
Ignition System	Direct Spark Ignition
Vent Type	Natural Draft
Warranty	Limited Lifetime Heat Exchanger, 5-year Parts
Fuel Type	Natural Gas or Propane

Summary

Product Identification and Safety Information

Parts Identification

Identifies the major components of the G20E/G20X series gas furnace.

General Safety Warnings

Crucial safety information regarding fire, explosion, and property damage risks.

Carbon Monoxide Hazard

Details the dangers of carbon monoxide gas and recommended precautions.

Lighting and Operation

Lighting and Operation Instructions

Provides instructions for lighting the furnace and operating the gas valve.

Turning Off Gas Supply

Step-by-step guide on how to safely turn off the gas supply to the unit.

Maintenance and Service

Filter Maintenance

Instructions for inspecting, cleaning, and replacing furnace filters.

Venting System Inspection

Guidance on annual inspection of the furnace venting system.

Blocked Vent Shut-Off System

Explanation of the safety system that detects vent blockages.

Service Reminders and Precautions

Key checks before calling for service and general safety precautions.