Inspecting Burners; Cleaning And Maintenance - Desa Comfort Glow LFP33PR Owner's Operation And Installation Manual

UNVENTED PROPANE/LP GAS FIREPLACE
INSPECTING
BURNERS
Check pilot flame pattern and burner flame
patterns often.
PILOT FLAME PATTERN
Figure 40 shows a correct pilot flame pat-
tern. Figure 41 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 41
• turn heater off (see To Turn Off Gas to
Appliance, page 17).
• see Troubleshooting, pages 19 through 21.
Pilot Burner
Figure 40 - Correct Pilot Flame Pattern
Pilot Burner
Thermocouple
Figure 41 - Incorrect Pilot Flame Pattern
MAIN BURNER
Periodically inspect all burner flame holes
with the heater running. All slotted burner
flame holes should be open with yellow
flame present. All round burner flame holes
should be open with a small blue flame
present. Some burner flame holes may be-
come blocked by debris or rust, with no
flame present. If so, turn off heater and let
cool. Either remove blockage or replace
burner. Blocked burner flame holes will
create soot.
LFP33PR
CLEANING AND
MAINTENANCE
WARNING: Turn off heater
and let cool before cleaning.
CAUTION: You must keep con-
trol areas, burner, and circulating
air passageways of heater clean.
Inspect these areas of heater be-
fore each use. Have heater in-
spected yearly by a qualified ser-
vice person. Heater may need more
frequent cleaning due to excessive
lint from carpeting, pet hair, etc.
CLEANING BURNER
INJECTOR HOLDER AND
PILOT AIR INLET HOLE
Thermocouple
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 rec-
ommend that you clean the unit every 2,500
hours of operation or every three months.
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 42).
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 hairs
with a soft cloth or vacuum cleaner nozzle.
5. Blow air into the primary air holes on
the injector holder.
6.
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 43).
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.
Burner
Tube
Primary Air Inlet
Holes (Shape of
Holes May Vary
by Model)
Figure 42 - Injector Holder On Outlet
Burner Tube
Burner
Tube
Figure 43 - Pilot Inlet Air Hole
LOGS
• If you remove logs for cleaning, refer to
• Replace log(s) if broken or chipped
MAIN BURNER
Periodically inspect all burner flame holes
with the heater running. All slotted burner
flame holes should be open with yellow
flame present. All round burner flame holes
should be open with a small blue flame
present. Some burner flame holes may be-
come blocked by debris or rust, with no flame
present. If so, turn off heater and let cool.
Either remove blockage or replace burner.
Blocked burner flame holes will create soot.
18
In case any large clumps of dust have
now been pushed into the burner repeat
steps 3 and 4.
Injector Holder
(May Be Brass
or Aluminum
Depending on
Model)
Ports/Slots
Pilot
Assembly
Installing Logs, page 13, to properly re-
place logs.
(dime-sized or larger).
Pilot Air
Inlet
Hole
104888