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110720-01A
15
15
For more information, visit www.desatech.com
For more information, visit www.desatech.com
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, bedding material, pet hair, etc.
ODS/PILOT AND BURNER ORIFICE
• 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 cabinet to remove dust.
INSPECTING BURNER
Continued
BURNER FLAME PATTERN
INFRARED MODELS
Figure 28 shows a correct burner flame pattern. Figure 29 shows an
incorrect burner flame pattern.
If burner flame pattern is incorrect, as shown in Figure 29
• turn heater off (see To Turn Off Gas to Appliance, page 12)
• see Troubleshooting, pages 16 through 18
Figure 29 - Incorrect Burner
Flame Pattern (Dual Burner
Shown)
Figure 28 - Correct Burner
Flame Pattern (Dual Burner
Shown)
CLEANING BURNER 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, and lint. 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, dirt, lint and pet hair. 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 for dust and dirt.
3. Blow air through the ports/slots and holes in the burner.
Clean the pilot assembly also. A yellow tip on the pilot flame
indicates 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 30). 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.
INSPECTING BURNER
Burner Flame Pattern Infrared Models
CLEANING AND MAINTENANCE
ODS/Pilot and Burner Orifice
Cleaning Burner Pilot Air Inlet Hole
Cabinet
Figure 30 - Pilot Inlet Air (Propane/LP Pilot Shown)
Pilot Assembly
Pilot Air Inlet