Cleaning And Maintenance - Desa VUL18NR Owner's Operation And Installation Manual

NOTICE: Do not mistake orange
flames with yellow tipping. Dirt
or other fine particles are burned
by heater, causing brief patches
of orange flame.
Figure 40 - Correct Front Burner Flame
WARNING: Turn off heater
and let cool before cleaning.
CAUTION: You must keep
control areas, burners and
circulating air passageways of
heater clean. Inspect these areas
of heater before each use. Have
heater inspected yearly by a quali-
fied service person. Heater may
need more frequent cleaning due
to excessive lint from carpeting,
pet hair, bedding material, etc.
WARNING: Failure to keep
the primary air opening(s) of
the burner(s) clean may result in
sooting and property damage.
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 pro-
vides 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
122001-01C
INSPECTING bURNERS
Pattern

CLEANING AND MAINTENANCE

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Continued
If front burner flame pattern is incorrect, as
shown in Figure 41
• turn heater off (see To Turn Off Gas to Appli-
ance, page 22 [Thermostat-Controlled Mod-
els] or page 24 [Remote-Ready Models])
• see Troubleshooting, page 29
Yellow Tipping
At Top of Blue
Flame
Figure 41 - Incorrect Front Burner Flame
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. 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 dam-
age the pilot assembly.
1. Shut off unit, including pilot. Allow 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 42).
3. Blow air through the ports/slots and holes
in the burner.
Ports/Slots
Burner
Tube
Primary Air
Inlet Holes
Figure 42 - Injector Holder On Outlet
Pattern
Injector Holder
Burner Tube
27