111162-01B
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For more information, visit www.desatech.com
For more information, visit www.desatech.com
Pilot Burner
Figure 28 - Correct Pilot Flame
Pattern (Propane/LP Shown)
Figure 29 - Incorrect Pilot Flame
Pattern (Propane/LP Shown)
INSPECTING BURNERS
Check pilot flame pattern and burner flame patterns often.
PILOT FLAME PATTERN
Figure 28 shows a correct pilot flame pattern. Figure 29 shows an
incorrect pilot flame pattern. The incorrect pilot flame is not heating
the 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 29
• turn heater off (see To Turn Off Gas to Appliance, page 14
• see Troubleshooting, pages 18 through 20
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.
Thermocouple
Pilot Burner
Thermocouple
BURNER PRIMARY AIR HOLES
Air is drawn into the burner through the holes in the fitting at the
burner entrance. These holes may become blocked with dust or lint.
Periodically inspect these holes for any blockage and clean if
needed. Blocked air holes will create soot.
MAIN BURNER
Periodically inspect all burner flame holes with the heater running. All
slotted burner flame holes should be open with yellow flame present.
All round burner flame holes should be open with a small blue flame
present. Some burner flame holes may become blocked by debris or
rust, with no flame present. If so, turn off heater and let cool. Remove
blockage. Blocked burner flame holes will create soot.
INSPECTING BURNERS
Pilot Flame Pattern
Burner Primary Air Holes
Main Burner
CLEANING AND MAINTENANCE
Cleaning Burner Injector Holder and Pilot Air Inlet Hole
Figure 30 - Injector Holder On Outlet Burner Tube
Burner Tube
Injector
Holder
Primary Air
Inlet Holes
CLEANING AND
MAINTENANCE
WARNING: Turn off heater and let cool before
cleaning.
CAUTION: You must keep control areas, burner,
and circulating air passageways of heater clean. In-
spect these areas of heater before each use. Have
heater inspected yearly by a qualified service person.
Heater may need more frequent cleaning due to exces-
sive lint from carpeting, pet hair, bedding material, etc.
CLEANING BURNER INJECTOR HOLDER
AND PILOT AIR INLET HOLE
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 tube 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 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 direc-
tions on the can. If you don't follow directions on the can, you could
damage the pilot assembly.
Note:
Removing the rear panel (Figure
5, page 8) and top grate(s) of your stove will make cleaning easier.
1.
Shut off the unit, including the pilot. Allow the unit to cool for
at least thirty minutes.
2.
Inspect burner, pilot, and primary air inlet holes on injector
holder for dust and dirt (see Figure 30).
3.
Blow air through the ports/slots and holes in the burner.
WARNING: Failure to keep the primary air
opening(s) of the burner(s) clean may result in soot-
ing and property damage.
