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Figure 20 - Correct Pilot Flame
Pattern
Figure 21 - Incorrect Pilot Flame
Pattern
Figure 23 - Incorrect Burner
Flame Pattern
Figure 22 - Correct Burner Flame
Pattern
BURNER FLAME PATTERN
Figure 22 shows a correct burner
flame pattern. Figure 23 shows an
incorrect burner flame pattern. If
pilot flame pattern is incorrect, as
shown in Figure 23:
l turn heater off (see To Turn Off
Gas To Appliance on page 12 for
non-thermostat model and page
11 for thermostat model).
l see Troubleshooting on pages 14
through 16.
CLEANING ODS/PILOT AND
BURNER
l Use a vacuum cleaner,
pressurized air or a small, soft
bristled brush to clean.
CLEANING BURNER PILOT
AIR INLET HOLE
We recommend that you clean the
unit every 2,500 hours of operation or
every three months. We also
recommend that you keep the burner
tube and pilot assembly clean and free
of dust and dirt. To clean these parts
we recommend using compressed
air no greater than 30 PSl.
Your local computer store, hardware
store. or home center may carry com-
pressed air in a can. You can use a
vacuum cleaner in the blow position. 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.
1. Shut off the unit, including thepilot
Allow the unit to cool for
at least thirty minutes.
2. Inspect burner and pilot for dust
and dirt.
3. Blow air through the ports/slots
and holes in the burner.
Also, clean the pilot assembly . A
yellow tip on the pilot flame indi-
cates dust and dirt in the pilot
assembly. There is a small pilot air
inlet hole about two inches from
where the pilot flame comes out of
the pilot assembly (see Figure 24).
With the unit off lightly blow air through
the air inlet hole. You may blow through
a drinking straw if compressed air is
not available.
Figure 24 - Pilot Inlet Air Hole
CLEANING HEATER CABINET
Air Passageways
l Use a vacuum cleaner or
pressurized air to clean.
Exterior
l Use a soft cloth dampened with
a mild soap and water mixture.
Wipe the cabinet to remove dust.
INSPECTING
BURNER
Check pilot flame pattern and
burner flame pattern often.
PILOT FLAME PATTERN
Figure 20 shows a correct pilot
flame pattern. Figure 21 shows an
incorrect pilot flame pattern. The
incorrect pilot flame is not touching
thermocouple. This will cause the
thermocouple to cool. When the
thermocouple cools, the heater will
shut down. If pilot flame pattern is
incorrect, as shown in Figure 21:
l turn heater off (see To Turn
Off Gas To Appliance on page
12 for non-thermostat model or
page 11 for thermostat model)
l see Troubleshooting pages 14
through 16.
CLEANING AND
MAINTENANCE
WARNING: If yellow tipping
occurs, your heater could produce
increased levels of carbon
monoxide. If burner flame pattern
shows yellow tipping, follow instruc-
tions at bottom of this page.
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: Turn off heater
and let cool before servicing.
CAUTION: You must keep control
areas, burner, and circulating air pas-
sageways 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.