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104463-01E
For more information, visit www.desatech.com
For more information, visit www.desatech.com
14
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. 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, 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 and top
grates 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 25).
3. Blow air through the ports/slots and holes in the burner.
Figure 25 - Injector Holder On Outlet Burner Tube
1. Follow steps 1 through 5 under Lighting Instructions, page 13.
2. Depress control knob and light pilot with match.
3. Keep control knob pressed in for 30 seconds after lighting
pilot. After 30 seconds, release control knob. Now follow
step 8, Lighting Instructions, page 13.
MANUAL LIGHTING
PROCEDURE
OPERATING HEATER
Continued
INSPECTING BURNERS
Check pilot flame pattern and burner flame patterns often.
PILOT FLAME PATTERN
Figure 23 shows a correct pilot flame pattern. Figure 24 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.
If pilot flame pattern is incorrect, as shown in Figure 24
• turn heater off (see To Turn Off Gas to Appliance, page 13)
• see Troubleshooting, pages 16 through 18
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.
Figure 23 - Correct Pilot Flame
Pattern
Figure 24 - Incorrect Pilot
Flame Pattern
Thermocouple
Pilot Burner
Burner Tube
Injector Holder
(May Be Brass
or Aluminum
Depending on
Model)
Primary Air Inlet Holes
(Shape of Holes May
Vary by Model)
Thermocouple
Pilot Burner
OPERATING HEATER
Manual Lighting Procedure
INSPECTING BURNERS
CLEANING AND MAINTENANCE
Cleaning Burner Injector Holder and Pilot Air Inlet Hole