Williams 4003532 - Manual (Page 14)

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DIRECT-VENT NATURAL GAS HEATER
THE COMFORT PRODUCTS PEOPLE
WARNING: Turn off and un-
plug furnace and let cool before
cleaning. Turn equipment shutoff
valve to OFF position. Only a
qualified service person should
service and repair furnace.
WARNING: Keep furnace clear
and free from combustible mate-
rials, gasoline, and other flam-
mable vapors and liquids.
CAUTION: You must keep
control areas, burner, and circu-
lating air passageways of furnace
clean. Inspect these areas of fur-
nace before each use. Have fur-
nace inspected yearly by a quali-
fied service person. Furnace may
need more frequent cleaning due
to excessive lint from carpeting,
bedding material, pet hair, etc.
CLEANING AND
MAINTENANCE
CAUTION: Label all wiring
prior to disconnection when ser-
vicing controls. Wiring errors can
cause improper and dangerous
operation.
Verify proper operation after ser-
vicing.
CABINET
Air Passageways
• Use a vacuum cleaner or pressurized air
to clean.
Exterior
• Use a soft cloth dampened with a mild
soap and water mixture. Wipe cabinet
and front cover to remove dust.
• Use a vacuum cleaner to remove dust
from front cover louvers.
EXHAUST AND INTAKE VENTS
Make sure the exhaust and intake vents are
not blocked. The intake combustion air and
the exhaust gases must be expelled to the
outside. Have a qualified service person clean
dirt and loose debris from vents annually.
GASKETS
Inspect all gaskets. If any gaskets show
signs of leakage or damage, replace them.
Safe operation of furnace depends on all
gaskets being tight.
FRONT COVER
Remove anything that may be blocking the
air to the louvers of the front cover.
COMBUSTION CHAMBER
AND MAIN BURNER
Check flame pattern of main burner often
(see Inspecting Burner Flame, page 13).
Have combustion chamber and main burner
cleaned if you have run the furnace with a
high yellow flame. Incomplete combustion
from lack of air causes the yellow flame.
This deposits soot inside the combustion
chamber and on the burner. Contact a quali-
fied service person to clean combustion
chamber and main burner.
OUTSIDE VENT CAPS
Inspect outside vent caps for obstructions or
soot. If soot is found, do not use furnace.
Contact a qualified service person to clean
furnace.