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506372-01 12/2012
Safety
1 - Keep unit area clear and free of combustible
materials, gasoline and other flammable vapors and
liquids.
2 - Do not obstruct air flow to unit. Unit must receive
an unobstructed flow of combustion and
ventilating air.
WARNING
Danger of explosion and fire. Failure to
follow safety warnings exactly could
result in dangerous operation, serious
injury, death or property damage.
WARNING
Improper installation, adjustment, alteration, ser
vice or maintenance can cause property damage,
personal injury or loss of life. Installation and ser
vice must be performed by a qualified installer, ser
vice agency or the gas supplier
WARNING
Electric shock hazard. Can cause injury
or death. Before attempting to perform
any service or maintenance, turn the
electrical power to unit OFF at discon
nect switch(es). Unit may have multiple
power supplies.
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
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
available from address shown below, or contact
your supervisor.
P.O. Box 79990
Dallas, TX 75379-9900 USA
CAUTION
Label all wires prior to disconnection when servic
ing controls. Wiring errors can cause improper and
dangerous operation. Verify proper operation after
servicing.
WARNING
Danger of electrical shock, explosion
and fire. Improper servicing could
result in dangerous operation, serious
inujry, death or property damage.
WARNING
Do not use this furnace if any part has been under
water. A flood-damaged furnace is extremely dan
gerous. Attempts to use the furnace can result in
fire or explosion. A qualified service agency
should be contacted to inspect the furnace and to
replace all gas controls, control system parts,
electrical parts that have been wet or the furnace
if deemed necessary.
WARNING
Danger of explosion. Can cause injury
or product or property damage. Should
the gas supply fail to shut off or if
overheating occurs, shut off the gas
valve to the furnace before shutting off
the electrical supply.
Unit Operation
FOR YOUR SAFETY READ BEFORE LIGHTING
BEFORE LIGHTING smell all around the furnace area for
gas. Be sure to smell next to the roof because some gas is
heavier than air and will settle on the roof.
The gas valve may be equipped with either a gas control
lever or gas control knob. Use only your hand to push
the lever or turn the gas control knob. Never use tools. If
the the lever will not move or 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.
The unit is equipped with an automatic spark ignition
system. There is no pilot. In case of a safety shutdown,
move thermostat switch to OFF and return the thermostat
switch to HEAT. Electromechanical thermostat is shown
in figure 1. For logic units and units with electronic
temperature controls, shut off the main disconnect and
then turn it on to reset the ignition control.
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