Desa GWP20T GWN30T - Manual (Page 16)

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16
INSPECTING HEATER
Burner Flame Pattern
CLEANING AND MAINTENANCE
ODS/Pilot and Burner
Cleaning Burner Pilot Air Inlet
Cabinet
CLEANING AND
MAINTENANCE
ODS/PILOT AND BURNER
• Use a vacuum cleaner, pressurized air, or small, soft bristled
brush to clean.
CLEANING BURNER PILOT AIR INLET
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 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 for dust and dirt.
3. Blow air through the ports/slots and holes in the burner.
4. Never insert objects into the pilot tube.
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 about two inches from where the pilot flame comes out of
the pilot assembly (see Figure 27). With the unit off, lightly blow air
through the air inlet. You may blow through a drinking straw if
compressed air is not available.
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, bedding material, pet
hair, etc.
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.
Figure 27 - Pilot Inlet Air (Propane/LP Pilot Shown)
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: If yellow tipping occurs, your heater
could produce increased levels of carbon monoxide.
BURNER FLAME PATTERN
Figure 25 shows a correct burner flame pattern. Figure 26 shows an
incorrect burner flame pattern. The incorrect burner flame pattern
shows yellow tipping of the flame. It also shows the flame higher
than 1/2 the glass panel height.
If burner flame pattern is incorrect, as shown in Figure 26
• turn heater off (see To Turn Off Gas To Appliance, page 14 or 15)
• see Troubleshooting, pages 17 through 19
1/2 G
Figure 25 - Correct Burner Flame Pattern
Yellow Tipping
1/2 G
Figure 26 - Incorrect Burner Flame Pattern
1 / 2 Glass
Height
1 / 2 Glass
Height
Blue
Flame
INSPECTING HEATER
Continued
Pilot Assembly
Pilot Air Inlet