Desa FPVF33NRA - Manual (Page 24)

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Figure 44 - Correct Pilot Flame Pattern
(Natural Gas Pilot Shown)
Figure 45 - Incorrect Pilot Flame Pattern
(Natural Gas Pilot Shown)
Pilot Burner
Thermocouple
Pilot Burner
Thermocouple
INSPECTING bURNER
Check pilot flame pattern and burner flame
patterns often.
pILOT FLAME pATTERN
Figure 44 shows a correct pilot flame pattern.
Figure 45 shows an incorrect pilot flame pat-
tern. The incorrect pilot flame is not properly
heating the thermocouple. When the thermo-
couple cools, the heater will shut down.
If pilot flame pattern is incorrect, as shown
in Figure 45
• turn heater off (see To Turn Off Gas to Ap-
pliance, page 21)
• see Troubleshooting, page 26
Note: The pilot flame on a natural gas units will
have a slight curve, but flame should be blue
and have no yellow or orange color.
BURNER pRIMARY AIR HOLES
Air is drawn into the burner through the holes
in the fitting at the burner entrance. These
holes may become blocked with dust or lint.
Periodically inspect these holes for any block-
age and clean if needed. Blocked air holes
will create soot.
Figure 46 - Correct Burner Flame Pattern
Yellow Tipping
Figure 47 - Incorrect Burner Flame
Pattern
MAIN BURNER
Periodically inspect all burner flame holes with
the fireplace running. All slotted burner flame
holes should be open with yellow flame pres-
ent. All round burner flame holes should be
open with a small blue flame present. Some
burner flame holes may become blocked by
debris or rust, with no flame present. If so, turn
off fireplace and let cool. Remove blockage.
Blocked burner flame holes will create soot.
BURNER FLAME pATTERN
WARNING: If yellow tipping
occurs, your fireplace could pro-
duce increased levels of carbon
monoxide.
NOTICE: Do not mistake orange
flames with yellow tipping. Dirt
or other fine particles enter the
fireplace and burn causing brief
patches of orange flame.
Figure 46 shows a correct burner flame pat-
tern. Figure 47 shows an incorrect burner
flame pattern. The incorrect burner flame
pattern shows the flame higher consistently
higher than 1" above the logs.
If burner flame pattern is incorrect, as shown
in Figure 47
• turn heater off (see To Turn Off Gas To
Appliance, page 21)
• see Troubleshooting, page 26