Desa CGN20 - Manual (Page 11)

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OWNER’S MANUAL
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
and bedding material, sawdust,
cobwebs, etc.
ODS/PILOT AND BURNER
• Use a vacuum cleaner, pressurized air,
or small, soft bristled brush to clean.
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 the cabi-
net to remove dust.
Figure 19 - Correct Burner Flame Pattern
Figure 20 - Incorrect Burner Flame Pattern
NOTICE: Do not mistake orange
flames with yellow tipping. Dirt
or other fine particles enter the
heater and burn causing brief
patches of orange flame.
WARNING: If yellow tipping
occurs, your heater could pro-
duce increased levels of carbon
monoxide. If burner flame pat-
tern shows yellow tipping, follow
instructions at bottom of this
page.
CORRECT FLAME PATTERN
AT HIGH POSITION
1/2 HEAT SHIELD
OR GLASS HEIGHT
Figure 18 - Incorrect Pilot Flame Pattern
INSPECTING
BURNER
Check pilot flame pattern and burner flame
pattern often.
PILOT FLAME PATTERN
Figure 17 shows a correct pilot flame pat-
tern. Figure 18 shows an incorrect pilot
flame pattern. The incorrect pilot flame is
not touching the thermocouple. This will
cause the thermocouple to cool. When the
thermocouple cools, the heater will shut
down.
Figure 17 - Correct Pilot Flame Pattern
Thermocouple
Pilot
Burner
Pilot
Burner
Thermocouple
If pilot flame pattern is incorrect, as shown
in Figure 18
• turn heater off (see To Turn Off Gas to
Appliance, page 10)
• see Troubleshooting, pages 12-14
1/2 HEAT SHIELD
OR GLASS HEIGHT
INCORRECT FLAME PATTERN
AT HIGH POSITION
Yellow
Tipping
BURNER FLAME PATTERN
Figure 19 shows a correct burner flame
pattern. Figure 20 shows an incorrect burner
flame pattern. The incorrect burner flame
pattern shows yellow tipping of the flame. It
also shows the flame higher than 1/2 the
heat shield height.
If burner flame pattern is incorrect, as shown
in Figure 20
• turn heater off (see To Turn Off Gas to
Appliance, page 10)
• see Troubleshooting, pages 12-14