Inspecting Burner; Cleaning And Maintenance; Manual Lighting Procedure; Pilot Flame Pattern - Desa FB-60BA Owner's Operation And Installation Manual

OPERATING
HEATER
Continued
MANUAL LIGHTING
PROCEDURE
1. Follow steps 1 through 5 under Light-
ing Instructions, page 12.
2. With control knob pressed in, strike
match. Hold match to pilot until pi-
lot lights.
3. Keep control knob pressed in for 30
seconds after lighting pilot. After 30
seconds, release control knob. Follow
steps 8 and 9 under Lighting Instruc-
tions, page 12.
INSPECTING
BURNER
Check pilot flame pattern and burner flame
pattern often.

PILOT FLAME PATTERN

Figure 21 shows a correct pilot flame pattern.
Figure 22 shows an incorrect pilot flame
pattern. The incorrect pilot flame is not touch-
ing the thermocouple. This will cause the
thermocouple to cool. When the thermo-
couple cools, the heater will shut down.
If pilot flame pattern is incorrect, as shown
in Figure 22
• turn heater off (see To Turn Off Gas to
Appliance, page 11 for non-thermostat
models or page 12 for thermostat model)
• see Troubleshooting, pages 14 through 16
Thermocouple
GOOD PILOT/LP
Figure 21 - Correct Pilot Flame Pattern
Thermocouple
Figure 22 - Incorrect Pilot Flame Pattern BAD PILOT/LP

BURNER FLAME PATTERN

Figure 23 shows a correct burner flame pattern.
Figure 24 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.
107299
WARNING: If yellow tipping
occurs, your heater could pro-
duce increased levels of carbon
monoxide. If burner flame pat-
tern shows yellow tipping, follow
instructions below.
NOTICE: Do not mistake orange
flames with yellow tipping. Dust
or other fine particles enter the
heater and burn causing brief
patches of orange flame.
If burner flame pattern is incorrect, as shown
in Figure 24
• turn heater off (see To Turn Off Gas to
Appliance, page 11 for non-thermostat
models or page 12 for thermostat model)
• see Troubleshooting, pages 14 through 16
Models FB-10BA and FBS-10BB
(Model FB-60BA will be lower due to
lower input rating)
Figure 23 - Correct Burner Flame Pattern
Figure 24 - Incorrect Burner Flame Pattern
Pilot Burner
CLEANING AND
MAINTENANCE
GRH/OV 007
WARNING: Turn off heater
and let cool before cleaning.
Pilot Burner
CAUTION: You must keep
control areas, burner, and circu-
lating air passageways of heater
GRH/OV 008
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,
bedding material, pet hair, etc.
OWNER'S MANUAL
ODS/PILOT AND BURNER
• Use a vacuum cleaner, pressurized air,
CLEANING BURNER
PILOT AIR INLET HOLE
We recommend 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.
2.
1/2 GLASS HEIGHT
3.
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
Yellow
pilot flame comes out of the pilot assembly
Tipping
(see Figure 25). With the unit off, lightly
blow air through the air inlet hole. You may
blow through a drinking straw if compressed
1/2 GLASS HEIGHT
air is not available.
Figure 25 - Pilot Inlet Air Hole
CABINET
Air Passageways
• Use a vacuum cleaner or pressurized air
Exterior
• Use a soft cloth dampened with a mild
13
or small, soft bristled brush to clean.
Shut off the unit, including the pilot.
Allow the unit to cool for at least thirty
minutes.
Inspect burner, pilot for dust and dirt.
Blow air through the ports/slots and
holes in the burner.
Pilot Air Inlet
Hole
Pilot Assembly
to clean.
soap and water mixture. Wipe the cabi-
net to remove dust.