Lennox G40DF-X User Manual



E 2001 Lennox Industries Inc.

Dallas, Texas, USA

504,322M
4/2001

G40DF(X)

SERIES

GAS FURNACE

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.

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.

04/01

*2P0401*

Litho U.S.A.

WARNING

WHAT TO DO IF YOU SMELL GAS:

D Do not try to light any appliance.
D Extinguish any open flames.
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.

504,322M

*P504322M*

G40DF(X) Parts Identification

CABINET

FLUE

COLLAR

TOP CAP

FLUE CHASE

BLOWER

MOTOR

CONTROL BOX

DURALOK

EXCHANGER

ASSEMBLY

COMBUSTION AIR

TM

INDUCER

HEAT

BLOWER ACCESS

PANEL

SURELIGHTt

CONTROL BOARD

COMBUSTION AIR

PROVING

(PRESSURE) SWITCH

GAS

VALVE

GAS

MANIFOLD

LOWER ACCESS

PANEL

BURNERS

FIGURE 1

WARNING

Product contains fiberglass wool.

Disturbing the insulation in this product during
installation, maintenance, or repair will expose you
to fiberglass wool. Breathing this may cause lung
cancer. (Fiberglass wool is known to the State of CalĆ
ifornia to cause cancer.)

Fiberglass wool may also cause respiratory, skin,
and eye irritation.

To reduce exposure to this substance or for further
information, consult material safety data sheets
available from address shown below, or contact your
supervisor.

Lennox Industries Inc.
P.O. Box 799900
Dallas, TX 75379-9900

NOTE - This manual must be left with the equipment
user.

Page 2

WARNING

Do not set thermostat below 60°F (16°C) in heating
mode. Setting thermostat below 60°F (16°C) reduces
the number of heating cycles. Damage to the unit
may occur that is not covered by the warranty.

WARNING

If overheating occurs or if gas supply fails to shut off,
shut off the manual gas valve to the appliance before
shutting off electrical supply.

CAUTION

Before attempting to perform any service or mainteĆ
nance, turn the electrical power to unit OFF at the
disconnect switch.