Lennox B050A3B, Installation/Servicing Instructions And Users Information Manual

Page: 30 / 36

Page 30 of 36 506307-01 Issue 1207
These furnaces are equipped with an ignition device which
automatically lights the burners.
Do not try to light the
burners by hand.
Before operating, smell around furnace area for gas. Be
sure to smell near floor because some gas is heavier than air
OPERATING YOUR FURNACE
and will settle to the lowest point. See WHAT TO DO IF YOU
SMELL GAS on page 29 if the odor of gas is present.
Use only your hand to turn the gas control knob; never use
tools. If the knob will not turn by hand, don’t try to repair it.
Call a qualified service technician. Force or attempted
repair may result in a fire or explosion.
IMPORTANT SAFETY INFORMATION
For your safety, read the following before operating your
furnace:
1. The furnace area must be kept clear and free of
combustible materials, gasoline, and other flammable
vapors and liquids.
2. Insulating materials may be combustible. A furnace
installed in an attic or other insulated space must be
kept free and clear of insulating materials. Examine
the furnace when it is installed and also any time
insulation is added.
3. For proper and safe operation, the furnace needs air
for combustion and ventilation. Do not block or
obstruct air openings on the furnace, air openings to
the area in which the furnace is installed, and the
spacings around the furnace.
4. This furnace is equipped with an ignition device which
automatically lights the burners. See OPERATING
YOUR FURNACE on this page for information on
lighting and shutting down the furnace.
5. 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.
6. Do not use the furnace if any part has been under
water. A flood-damaged furnace is extremely
dangerous. 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.
7. Examine the furnace installation to determine that:
A. All flue gas carrying areas external to the furnace,
such as the chimney and vent connector, are
clear and free of obstructions.
B. Vent connector is in place, slopes upward, and
is physically sound without holes or excessive
corrosion.
C. Return air duct connection(s) is physically sound,
sealed to the furnace casing, and terminates
outside the space containing the furnace.
D. Physical support of the furnace is sound without
sagging, cracks, gaps, etc. around the base as
to provide a seal between the support and the
base.
E. There are no obvious signs of deterioration of
the furnace.
F. Burner flames are in good adjustment (see
Burner Flame beginning on page 34).
8. It is important that you conduct a physical inspection
of the furnace at least twice a year. It is also
recommended that the furnace should be inspected
by a qualified service agent at least once per year.
Failure to follow the safety warnings exactly could
result in dangerous operation, serious injury, death,
or property damage.
Improper servicing could result in dangerous
operation, serious injury, death, or property damage.
• Before servicing, disconnect all electrical power
to furnace.
• When servicing controls, label all wires prior to
disconnecting. Reconnect wires correctly.
• Verify proper operation after servicing.
ELECTRICAL SHOCK, FIRE,
OR EXPLOSION HAZARD
WARNING