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108117-01J
For more information, visit www.desatech.com
For more information, visit www.desatech.com
26
INSPECTING BURNERS
Pilot Flame Pattern
Main Burner
CLEANING AND MAINTENANCE
Cleaning Burner Injector Holder
Check pilot flame pattern and burner flame patterns often.
PILOT FLAME PATTERN
Figure 55 shows a correct pilot flame pattern. Figure 56 shows an
incorrect pilot flame pattern. The incorrect pilot flame is not
properly heating the thermocouple. When the thermocouple cools,
the heater will shut down.
If pilot flame pattern is incorrect, as shown in Figure 56
• turn heater off (see To Turn Off Gas to Appliance, page 24)
• see Troubleshooting, pages 29 through 31
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.
INSPECTING BURNERS
MAIN BURNER
Periodically inspect all burner flame holes with the heater running. All
slotted burner flame holes should be open with 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 may create soot.
Figure 55 - Correct Pilot Flame Pattern (Natural Gas Pilot Assy
Shown)
Figure 56 - Incorrect Pilot Flame Pattern (Natural Gas Pilot Assy
Shown)
Thermocouple
Pilot Burner
Thermocouple
Pilot Burner
CLEANING AND
MAINTENANCE
WARNING: Turn off fireplace and let cool before
cleaning.
CAUTION: You must keep control areas, burners,
and circulating air passageways of fireplace clean.
Inspect these areas of fireplace before each use.
Have fireplace inspected yearly by a qualified service
person. Fireplace may need more frequent cleaning
due to excessive lint from carpeting, bedding mate-
rial, pet hair, etc.
CLEANING BURNER INJECTOR HOLDER
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 compressed 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 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 57).
3. Blow air through the ports/slots and holes in the burner.
4. Check the injector holder located at the end of the burner tube
again. Remove any large particles of dust, dirt, lint, or pet hair
with a soft cloth or vacuum cleaner nozzle.
5. Blow air into the primary air holes on the injector holder.
6. In case any large clumps of dust have now been pushed into
the burner repeat steps 3 and 4.
Figure 57 - Injector Holder On Outlet Burner Tube
Burner
Tube
Injector Holder
WARNING: Failure to keep the primary air
opening(s) of the burner(s) clean may result in soot-
ing and property damage.