Lennox G12 Series

USER'S INFORMATION
G12, G12R and G12X Series Units
i i • ,i
GABUNIT8 RETAIN THESE INSTRUCTIONS FOR FUTURE REFERENCE
502,253M
8/90
SuperP,edee 3188
FOR YOUR SAFETY
Do not store or use gasoline or other
Eflammable vapors and liquids in the
Ivicinity of this or any other appliance.
i
WARNING
Improper InStallation, adjustment, alter.
arian, service, or ma|nte_'tance can
cause Injury or property damage. Refer
to this manual. For assistance or addi-
tional Information, consult a qualified
Installer, service agency, or the gas
supplier.
,,=
Litho U,S,A,
.... FOR YO01_'SAFETY
WHAT TO DO IFYOU SMELL GAS:
• Do not try to light any appliance.
• Open windows.
• Do not touch any electrical swite,b; De
not use the phone In your building.
• Immediately call your gas suppl|er from
a neighbor's phone. Follow the gas
suppller's Instructions.
• If you cannot reach your gas supplier,
call the fire department.

Lennox G12 Series Specifications

General

Brand	Lennox
Model	G12 Series
Category	Power Supply
Language	English

Summary

Users Information

General Safety Precautions

Safety instructions regarding flammable vapors, liquids, and general appliance safety.

Parts Identification

Upflow and Downflow Series Components

Identifies key components for both upflow and downflow furnace configurations.

Important Directions

Operational & Safety Guidelines

Guidelines for maintaining clear space, airflow, and avoiding corrosive materials.

Lighting Information and Operation

Pre-Lighting Safety Warnings

Crucial safety warnings and instructions to follow before attempting to light the appliance.

Placing Furnace in Operation

Standing Pilot Lighting Procedure

Step-by-step instructions for lighting the furnace pilot light on standing pilot models.

Intermittent Pilot Operation Information

Ignition and Lighting Procedure

Instructions for operating and lighting furnaces with intermittent pilot ignition systems.

Turning Off Gas To Unit

Procedure for Gas Shut-off

Steps to safely turn off the gas supply to the furnace unit.

Service

Filter Servicing Overview

Information and procedures for inspecting and replacing furnace air filters.

Slab Type Filter Replacement (Upflow)

Detailed steps for replacing slab type air filters in upflow furnace configurations.

Hammock Filter Replacement (Upflow)

Detailed steps for replacing hammock type air filters in upflow furnace configurations.

G12 R-5582 Filter Service

Instructions for servicing and replacing filters in G12R-55/82 furnace models.

G12 A-110 Filter Service

Instructions for servicing and replacing filters in G12A-110 furnace models.

G12 R-137165 Filter Service

Instructions for servicing and replacing filters in G12R-137/165 furnace models.

Pilot and Burner Flame Inspection

Operational Flame Checks

Guidelines for inspecting pilot and burner flames for proper furnace operation.

Lubrication

Blower Motor Lubrication

Information regarding lubrication requirements for blower motors.

Furnace Venting System Inspection

Periodic Unit Inspection

Recommendations for scheduling professional inspections by a qualified technician.

Service Reminder

Pre-Service Checks

Essential checks to perform before calling for service to ensure functionality.

Planned Service

Annual Maintenance Program

Information on contacting a dealer for a planned service program for peak condition.