Lennox G24E SERIES Guide

Page 1
£
PRODUCT LITERATURE
¤ 1998 Lennox Industries Inc.
Dallas, Texas
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.
:$51,1*
Do not store or use gasoline or other
flammable vapors and liquids in the
vicinity of this or any other appliance.
Installation and service must be per-
formed by a qualified installer, ser-
vice agency or the gas supplier.
Do not try to light any appliance.
Do not touch any electrical switch; do not
use any phone in your building.
Immediately call your gas supplier from a
neighbor’s phone. Follow the gas supplier’s
instructions.
If you cannot reach your gas supplier, call
the fire department.
Extinguish any open flames.
RETAIN THESE INSTRUCTIONS
FOR FUTURE REFERENCE Litho U.S.A.
G24E
SERIES
GAS FURNACE
503,891M
9/98
Supersedes 503,299M
0$.(5·6 :$55$17<
This appliance complies
with the requirements of
THE AUSTRALIAN
GAS ASSOCIATION

Page 2
G24E PARTS IDENTIFICATION
COIL DECK
FLUE BAFFLES
(75 only)
HEAT EXCHANGER
ASSEMBLY
BURNER ASSEMBLY
BLOWER ASSEMBLY
COMBUSTION AIR
BLOWER
FLUE BOX
FRONT LOUVERED
PANEL
DOOR INTERLOCK SWITCH BLOWER ACCESS
PANEL
CONTROL BOARD
TRANSFORMER
PRESSURE
SWITCH
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
causelungcancer.(Fiberglasswoolis knownto
the State of California to cause cancer.)
Fiberglass wool may also cause respiratory,
skin, and eye irritation.
To reduce exposure to this substance or for fur-
ther 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
WARNING
If overheating occurs or if gas supply fails to
shut off, shut off the manual gas valve to the ap-
pliance before shutting off electrical supply.
WARNING
Do not use this furnace if any part has been
underwater. Immediately call a qualified service
technician to inspect the furnace and to replace
any part of the control system and any gas con-
trol which has been under water.
CAUTION
Before attempting to perform any service or
maintenance, turn the electrical power to unit
OFF at disconnect switch.

Page 3
IMPORTANT
Any additions, changes, or conversions re-
quiredinorder for theappliancetosatisfactorily
meet the application needs must be made by a
Lennox service technician using factory speci-
fied and approved parts.
IMPORTANT DIRECTIONS
1 - Keep the furnace area clear and free of combustible
material,gasoline,andotherflammablevaporsandliq-
uids. If installed in an insulated area, furnace must be
kept free of insulating material. Insulating material may
be combustible. Inspect furnace venting system to
make sure it is in place, physically sound, and without
holes, corrosion, or blockage. Inspect furnace return
air duct connection to ensure duct is sealed to the fur-
nace and terminates outside the space containing the
furnace. Inspect the physical support of the furnace to
guarantee that it is sound without sagging, cracks or
gaps around base and it maintains seal between base
and support.
2 - DO NOT obstruct air flow to unit. Unit must receive an
unobstructed flow of combustion and ventilating air.
3 - DO NOT store chlorine or fluorine products near unit or
introduce these products into the combustion air.
These products can cause furnace corrosion.
LIGHTING INFORMATION AND OPERATION
WARNING
If you do not follow these instructions exactly, a
fire or explosion may result causing property
damage, personal injury or loss of life.
BEFORE LIGHTING smell all around the appliance
area for gas. Be sure to smell next to the floor because
some gas is heavier than air and will settle on the
floor.
Use only your hand to push in or turn the gas control
knob. Never use tools. If the knob will not push in or turn
by hand, do not try to repair it, call a qualified service
technician. Force or attempted repair may result in a fire
or explosion.
To place G24E furnace into operation:
G24E units are equipped with an electronic ignition sys-
tem. Do not attempt to manually light burners on these
furnaces. Each time thermostat calls for heat, the burn-
er will automatically light.
Gas Valve Operation (Figures 2 and 3)
1- STOP! Read the safety information at the beginning
of this section.
2 - Set thermostat to lowest setting. See figure 1.
3 - Turn off all electrical power to appliance.
4 - This appliance Is equipped with an ignition device
which automatically lights the burner. Do not try to
light the burner by hand.
5 - Remove control access panel.
6-
White Rodgers 36E Gas Valve - Turn knob on gas
valve 180 q either way to OFF. See figure 2.
Honeywell VR8205 Gas Valve - Turn knob on gas
valve clockwise to OFF. Do not force. See figure
3.
THERMOSTATS
FIGURE 1
FIGURE 2
WHITE RODGERS 36E SERIES GAS VALVE
GAS VALVE SHOWN IN OFF POSITION
12
2))
ON
OFF
FIGURE 3
HONEYWELL VR8205 SERIES GAS VALVE
GAS VALVE SHOWN IN OFF POSITION
7 - Wait five (5) minutes to clear out any gas. If you then
smell gas, STOP! Immediately call your gas supplier
from a neighbor’s phone. Follow the gas supplier’s
instructions. If you do not smell gas go to next step.
8-
White Rodgers 36E Gas Valve - Turn knob on gas
valve 180 q either way to ON.
Honeywell VR8205 Gas Valve - Turn knob on gas
valve counterclockwise to ON. Do not force.

Page 4
9 - Replace control access panel.
10- Turn on all electrical power to unit.
11- Set thermostat to desired setting.
NOTE-When unit is first started, steps 1 through 11 may
needtoberepeatedtopurgeairfromgasline.
12- If the appliance still will not operate, follow the
instructions “To Turn Off Gas To Unit” and call your
service technician or gas supplier.
To Turn Off Gas To Unit
1 - Set thermostat to lowest setting.
2 - Turn off all electrical power to unit if service is to be
performed.
3 - Remove control access panel.
4 - TurnknobonWhiteRodgersgas valve180 q eitherway
toOFF; turn knob on Honeywell valve clockwise to
OFF. Do not force.
5 - Replace control access panel.
BLOWER
Check and clean blower wheel for any debris. Blower
motor is prelubricated for extended bearing life. No
further lubrication is needed.
WARNING
Blower door must be securely in place when
blower and burners are operating. Gas fumes,
which could contain carbon monoxide, can be
drawn into living spaceresulting in personal in-
jury or death.
BURNER FLAME
The G24E burner flame is not adjustable; however,
the flame should be inspected at the beginning of
each heating season and burners should be cleaned,
if necessary. Burner flame should be blue when burn-
ing natural gas, blue/yellow when burning propane
gas.
BURNER FLAME
FIGURE 4
BURNER
FLAME
HEAT
EXCHANGER
TUBE
VEST
PANEL
FLAME APPEARS BLUE IF
BURNING NAT. GAS; BLUE/
YELLOW FOR PROPANE.
VENTING SYSTEM INSPECTION
Annually (before heating season) inspect furnace
venting system, vent cap, heat exchanger and burn-
ers for corrosion, deterioration, or deposits of debris.
Remove any obstructions.
Contact your Lennox dealer for a periodic unit inspec-
tion by a qualified service technician.
FLAME ROLLOUT SAFETY SWITCHES
Your Lennox furnace is equipped with two flame roll--
out safety switches which shut off the gas supply to
the furnace in case of heat exchanger blockage. If the
furnace fails to operate due to thefunctioning of these
safety switches, DO NOT attempt to place the furnace
into operation. Contact a qualified service technician.
SERVICE REMINDER
Call your Lennox service technician if unit is inopera-
tive. Before calling, always check the following to be
sure service is required.
1 - Check that electrical disconnect switches are ON.
2 - Check room thermostat for proper setting.
3 - Replace any blown fuses or reset circuit breakers.
4 - Gas valve should be ON.
5 - Air filter should not be plugged limiting air flow.
6 - Is gas turned on at meter?
7 - Is manual main shut-off valve open?
To keep your Lennox gas heating system in peak op-
erating condition year after year, contact your inde-
pendent Lennox dealer about a planned service pro-
gram.