www.desatech.com
113109-01C
3
INSPECTING bURNER
Check pilot flame pattern and burner flame pat-
terns often.
pILOT FLAME pATTERN
Figure 44 shows a correct pilot flame pattern.
Figure 45 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 45
• turn heater off (see
To Turn Off Gas to Appli-
ance
, page 21)
• see
Troubleshooting
, page 25
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.
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
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 blockage and clean if
needed. Blocked air holes will create soot.
MAIN BURNER
Periodically inspect all burner flame holes with
the fireplace 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 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 pattern.
Figure 47 shows an incorrect burner flame pat-
tern. 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 Appli-
ance
, page 21)
• see
Troubleshooting
, page 25
Figure 46 - Correct Burner Flame Pattern
Yellow Tipping
Figure 47 - Incorrect Burner Flame
Pattern
