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110021-01M
26
CLEANING AND
MAINTENANCE
WARNING: Turn off heater
and let cool before cleaning.
CAUTION: You must keep
control areas, burner and circu-
lating air passageways of heater
clean. Inspect these areas of
heater before each use. Have
heater inspected yearly by a quali-
fied 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.
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 provides
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 recommend using
compressed air no greater than 30 PSI. Your local
computer store, hardware store or home center
may carry compressed air in a can. You can use a
vacuum cleaner in the blow position. If using com
-
pressed 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.
BURNER FLAME PATTERNS
Figure 38 shows correct front and/or middle burner
flame patterns. Figure 39 shows incorrect 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.
If front and/or middle burner flame patterns are
incorrect, as shown in Figure 39
• turn heater off (see To Turn Off Gas to Appli
-
ance, page 21 [Thermostat-Controlled Models]
or page 24 [Remote-Ready Models])
• see Troubleshooting
, page 28
INSPECTING BURNERS
Continued
Figure 38 - Correct Burner Flame
Patterns
Figure 39 - Incorrect Burner Flame
Patterns
Yellow
Tipping At
Top of Blue
Flame
(CSG3924NT/PT, CSG3924NR/PR and
CSG3930NR/PR Models shown)
(CSG3924NT/PT, CSG3924NR/PR and
CSG3930NR/PR Models shown)