Filter
Top Products
To Turn Off Gas To Unit
1 - Set thermostat to lowest setting.
2 - Turnoffallelectrical powertounit ifserviceis tobeper-
formed.
3 - Remove burner compartment access panel.
4 - HoneywellVR8205Gas Valves -Turn knob on gasvalve
clockwise
to OFF. Do not force.
Robertshaw 7200 Gas Valve - Push in gas control le-
ver, move to OFF, and release.
5 - Replace access panel.
Filters
Filters are not supplied. Inspect the filters once a month
and replace or clean them as necessary. DO NOT replace
a permanent-type filter with a disposable filter.
Unitis equippedwith aninternalfilterclipwhich is located in
indoor coil compartment attached to side of the unit drain
pan.
GCS26 UNIT MODEL FILTER SIZE
-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
g
in
g
or cleanin
g
filters and (under some conditions)
cleanin
g
the main burners.
WARNING
Disconnect power before servicing unit.
WARNING
Improperinstallation, adjustment,alteration, service
ormaintenancecancauseproperty damage,person-
al injury or loss of life. Installation and service must
be performed bya 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
outdoor coil surface or other parts in the air circuit. Clean the
coild when necessary. Use a brush, vacuum cleaner attach-
ment, or other suitable means. If water is used to clean the
coil, be sure the power to unit is shut off prior to cleanin
g
.
NOTE - Care should be used when cleaning the coilso that
the coil fins are not damaged.
Donot permitoverhan
g
in
g
structuresorshrubsto block the
hot condenser air dischar
g
e.
Heating System Inspection
The owner is responsible for ensurin
g
that a qualified ser-
vice technician inspects the entire heatin
g
portion of the
unitannually.Thisinspectionshould includethe burner, the
heat exchan
g
er, and flue for any corrosion or soot accu-
mulation. If any corrosion or soot accumulation is found,
the burner, the heat exchan
g
ers, and the flue may have to
be cleaned. The technician should also check the burner
and controls for proper operation.
Vent Outlet
Visually inspect vent outlet periodically to prevent excessive
buildup of soot and dirt. If necessary, clean the vent outlet to
maintain unobstructed dischar
g
e of the flue products.
Burner Flame
The burner flame is not adjustable; however, the flame
should be inspected at the be
g
innin
g
of each heatin
g
sea-
son and burners should be cleaned, if necessary. Burner
flame should be blue when burnin
g
natural
g
as.
Venting System Inspection
Annually (before heatin
g
season) inspect furnace ventin
g
system, vent cap, heat exchan
g
er and burners for corro-
sion, deterioration, or deposits of debris. Remove any ob-
structions.
Contact your Lennox dealer for a periodic unit inspection
by a qualified service technician.
Rollout Safety Switch
Your
g
as/electric unit is equipped with a roll-out safety
switch which shuts off the
g
as supply to the furnace in case
the heat exchan
g
er becomes blocked. If the heatin
g
section
of the unit fails tooperate due tothe functionin
g
of this safety
switch,
DO NOT
attempt to place the unit into operation.
Contact a qualified service technician.
Call your service technician if unit is inoperative. Before
calling, always check the following to be sure service is re-
quired.
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 operating
condition year after year, contact your independent Lennox
dealer about a planned service program.