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Note: The pilot flame on natural gas units will
have a slight curve, but flame should be blue
and have no yellow or orange color.
BURNER FLAME PATTERNS
Figure 31 shows correct front and/or middle
burner flame patterns. Figure 32 shows incor-
rect front and/or middle burner flame patterns.
The incorrect burner flame patterns show
yellow tipping at top of blue flame.
WARNING: If yellow tipping
occurs, your heater could pro-
duce increased levels of carbon
monoxide. If burner flame pat-
terns show yellow tipping, follow
instructions below. Yellow flame
on rear burner is normal.
NOTICE: Do not mistake orange
flames with yellow tipping. Dirt
or other fine particles are burned
by heater, causing brief patches
of orange flame.
WARNING: Turn off heater
and let cool before cleaning.
CAUTION: You must keep con-
trol areas, burner and circulating
air passageways of heater clean.
Inspect these areas of heater
before each use. Have heater
inspected yearly by a qualified
service person. Heater may need
more frequent cleaning due to
excessive lint from carpeting,
bedding material, pet hair, etc.
WARNING: Failure to keep
the primary air opening(s) of
the burner(s) clean may result in
sooting and property damage.
123639-01D
INSPECTING BURNERS
CLEANING AND MAINTENANCE
www.desatech.com
Continued
If front and/or middle burner flame patterns
are incorrect, as shown in Figure 32
• turn heater off (see To Turn Off Gas to Ap-
pliance, page 21
• see Troubleshooting, page 25
Figure 31 - Correct Burner Flame
Yellow
Tipping At
Top of Blue
Flame
Figure 32 - Incorrect Burner Flame
BURNER INjECTOR HOLDERS AND
PILOT AIR INLET HOLES
The primary air inlet holes allow the proper
amount of air to mix with the gas. This pro-
vides a clean burning flame. Keep these
holes clear of dust, dirt, lint and pet hair.
Clean these air inlet holes prior to each
heating season. Blocked air holes will create
soot. We recommend that you clean the unit
every three months during operation and
have heater inspected yearly by a qualified
service person.
We also recommend that you keep the burner
tubes and pilot assembly clean and free of
dust and dirt. To clean these parts we recom-
mend using compressed air no greater than
30 PSI. Your local computer store, hardware
store or home center may carry compressed
air in a can. If using compressed air in a can,
please follow the directions on the can. If you
don't follow directions on the can, you could
damage the pilot assembly.
Patterns
Patterns
23
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