Lennox 12GCS, 10GCS User's Information Manual

PRODUCT LITERATURE

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1998 LennoxIndustries Inc.

Dallas, Texas,USA

Armstrong #38152A054
503,969M

10GCS

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RETAIN THESE INSTRUCTIONS

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Do notstoreoruse gasoline orother
flammable 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.

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WHAT TO DO IF YOU SMELL GAS:

- Do not try to light any appliance.

- Extinguish any open flames.

- Do not touch any electrical switch; do not

use any phone in your building.

- Immediately call your gas supplier from a
neighbor’sphone. Followthe gass upplier’s
instructions.

- If you cannot reach your gas supplier, call
the fire department.

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Parts Arrangement

CONDENSER FAN

CONDENSER COIL

BLOWER

BLOWER MOTOR

COMPRESSOR

HEAT EXCHANGER

ASSEMBLY

PRESSURE SWITCH

GAS

MANIFOLD

GAS V ALVE

BURNER BOX

COMBUSTION

AIR BLOWER

CONTROL BOX SECTION

FIGURE 1

Any additions, changes,or conversions required in order for the appliance to satisfactorilymeet the ap-

plication needs must be made by a Lennox service technician using factory specified and approved parts.

WARNING

Product contains fiberglass wool.
Disturbing the insulation in this product during

installation, maintenance, or repair will expose you
to fiberglass wool dust. Breathing this may cause

Anyadditions, changes,or conversionsrequired inor­der for the applicnace to satisfactorily meet the ap­plication needs must be made by a Lennox service
technicain usingfactory specifiedand approvedparts.

IMPORTANT

lung cancer. (Fiberglass wool is known to 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 further
information, consult material safety data sheets
availablefromaddressshown below,or contactyour
supervisor.

Lennox Industries Inc.
P.O. Box 799900

Dallas, TX 75379-9900

Important Directions

Keep the area clean and free of combustible material, gaso­line, andother flammable vapors and liqu ids. Theflow of com­bustion and ventilation air must not be obstructed from enter­ing the furnace or condenser coil. Do not permit overhanding
structures or shrubs to obstruct conden ser fan discharge,
combustion air inlet or vent outlet.

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Heating Start-Up

FOR YOUR SAFETY READ BEFORE LIGHTING
BEFORE LIGHTING, smell all around the appliance area

forgas.Be sureto smellnexttothefloor becausesomegas
is heavier than air and will settle on the floor.

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Electric shock hazard. Can cause injury
or death. Do not use this furnace if any
part has been under water. Immediately
call a qualified service technician to in­spect the furnace and to replace any part
ofthe controlsystem and anygas control
which has been under water.

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Danger of explosion. Can cause injury or
product or property damage. If overheating
occursor ifgas supplyfails to shut off,shut
off the manual gas valve to the appliance
before shutting off electrical supply.

3 - Turn off all electrical power to unit.
4 - This unit isequipped with anignition device whichau-

tomaticallylightsthe pilot.Donot trytolightthepilot by
hand.

5 - Remove burner compartment access panel.

Honeywell VR8205 Gas Valve

6-

valve clockw ise

Robertshaw7200G asValve

controlandmovetoOFFandrelease. Donotfor ce.
Refer to figure 4.

HONEYWELL VR8205 SERIES GAS VALVE

GAS VALVESHOWN I N OFF POSITION

to OFF. Refer to figure 3.

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- Turn knob on gas

-Depresslever ongas

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Danger of explosion and fire. Can cause
injury or product orproperty damage. You
must follow these instructions exactly.

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Electricshockhazard. Can causeinjury or
death. Before attempting to perform any
serviceormaintenance,turn theelectrical
power to unit OFF at disconnect switch(es) .
Unit may have multiple power supplies.

To place the unit into heating operation:
This unit does not have a pilot. It is equipped with an

ignition system which automaticallylights the burner.
Do not try to light by hand.

Gas Valve Operation (Figures

1- STOP! Readthesafety informationat thebeginningof

this section.

2 - Set thermostat to lowest setting. See figure 2.

THERMOSTATS

FIGURE 2

3 and 4

)

ROBERTSHAW 7200 GAS V ALVE

GAS VALVE

SELECTOR ARM

IN OFF

POSITION

FIGURE 4

7 - Wait fifteen(15) minutes toclear 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. Ify ou do not smellgas go to
next step.

Honeywell VR8205 Gas Valve

8-

valve counterclockwise

Robertshaw 7200 Gas Valve

control and move to ON and release.

9 - Replace the access panel.
10- Turn on all electrical power to unit.
11- Set thermostat to desired setting.
12- If theappliance still willnot operate, followthe instruc-

tions “To Turn Off Gas To Unit” and call your service
technician or gas supplier.

- Turn knob on gas

to ON.

- Depress lever on gas

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To Turn Off Gas To Unit

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1 - Set thermostat to lowest setting.
2 - Turnoffallelectricalpowerto unitif serviceistobeper-

formed.
3 - Remove burner compartment access panel.
4 - HoneywellVR8205 GasValves-Turn knobongas valve

clockwise

Robertshaw 7200 Gas Valve- Push in gas control le-

ver, move to OFF, and release.
5 - Replace access panel.

to OFF. Do not force.

Filters

Filters are not supplied. Inspect the filters once a month
and replaceor clean them as necessary.DO NOT replace
a permanent-type filter with a disposable filter.

Unitisequippedwith aninternalfilter clipwhichis locatedin
indoor coil compartment attached to side of the unit drain
pan.

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GCS26 UNIT MODEL FILTERSIZE

-024, -030, -036 24 in. X 25 in.

-042 28 in. X 25 in.

-048, -060 30 in. X 30 in.

Maintenance

Normal Maintenance

Periodic inspection and maintenance normally consists of
chan
cleanin

or cleaningfilters and (under some conditions)

the main burners.

WARNING

Disconnect power before servicing unit.

NOTE- Careshould beusedwhen cleaningthecoilso that
the coil fins are not damaged.

Donotpermitoverhangingstructuresor shrubsto blockthe
hot condenser air dischar

Heating System Inspection

The owner is responsible for ensurin
vice technician inspects the entire heatin
unitannually.This inspectionshouldincludetheburner,the
heat exchan
mulation. If any corrosion or soot accumulation is found,
the burner, the heat exchan
be cleaned. The technician should also check the burner
and controls for proper operation.

Vent Outlet

Visuallyinspectvent outlet periodicallyto preventexcessive
buildupof soot anddirt. If necessary,clean thevent outletto
maintain unobstructed dischar

Burner Flame

The burner flame is not adjustable; however, the flame
should be inspected atthe be
son and burners should be cleaned, if necessary. Burner
flame should be blue when burnin

Venting System Inspection

Annually (before heatin
system, vent cap, heat exchanger and burners for corro­sion, deterioration, or deposits of debris. Remove any ob­structions.

Contact your Lennox dealer for a periodic unit inspection
by a qualified service technician.

Rollout Safety Switch

Your
switch whichshuts off the
theheat exchan
ofthe unitfails tooperatedue tothe functionin
switch,
Contact a qualified service technician.

er, and flue for any corrosion or soot accu-

as/electric unit is equipped with a roll-out safety

erbecomes blocked.If theheatingsection

DO NOT

attempt to place the unit into operation.

e.

that a qualified ser-

portion of the

ers, and the fluemay have to

e of the flue products.

inningof each heatingsea-

naturalgas.

season) inspect furnace ventin

as supply to the furnace in case

ofthis safety

WARNING

Improperinstallation,adjustment, alteration, service
ormaintenancecancausepropertydamage,person­al injury or loss of life. Installation and service must
be performed by a qualified installer,service agency
or the gas supplier.

Motors

Indoor, outdoor fan and vent motors are permanently
lubricated and require no maintenance.

Outdoor Coil

Dirt and debris should not be allowed to accumulate on the
outdoorcoil surfaceor otherparts inthe aircircuit.Clean the
coildwhennecessary.Use abrush, vacuumcleanerattach­ment, or other suitable means. If water is used to clean the
coil, be sure the power to unit is shut off prior to cleanin

.

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Call your service technician if unit is inoperative. Before
calling, alwayscheck thefollowing to be sureservice isre­quired.

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 gasheating system in peak operating
condition year after year, contact your independent Lennox
dealer about a planned service program.