www.desatech.com 119526-01A22
INSPECTING BURNERS
Check pilot ame pattern and burner ame pat-
terns often.

pILOT FLAME pATTERN

Figure 35 shows a correct pilot ame pattern.
Figure 36 shows an incorrect pilot ame pattern.
The incorrect pilot ame is not properly heating
the thermocouple. When the thermocouple cools,
the heater will shut down.
If pilot ame pattern is incorrect, as shown in
Figure 36
turn heater off (see To Turn Off Gas to Appli-
ance, page 20)
see Troubleshooting, page 24
Note: The pilot ame on a natural gas units will
have a slight curve, but ame should be blue and
have no yellow or orange color.
Figure 35 - Correct Pilot Flame Pattern
Figure 36 - Incorrect Pilot Flame Pattern
Pilot Burner Thermocouple
Thermocouple
Pilot Burner
Thermocouple
Pilot Burner
Thermocouple
Pilot Burner
Natural Gas Pilot
Propane/LP Gas Pilot
Natural Gas Pilot
Propane/LP Gas Pilot

BURNER pRIMARY AIR HOLES

Air is drawn into the burner through the holes in
the tting 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 ame holes with the
replace running. All slotted burner ame holes
should be open with yellow ame present. All round
burner ame holes should be open with a small blue
ame present. Some burner ame holes may become
blocked by debris or rust, with no ame present. If
so, turn off replace and let cool. Remove blockage.
Blocked burner ame holes will create soot.

BURNER FLAME pATTERN

WARNING: If yellow tipping

occurs, your replace could

produce increased levels of

carbon monoxide.

NOTICE: Do not mistake orange

ames with yellow tipping. Dirt

or other ne particles enter the

replace and burn causing brief

patches of orange ame.

Figure 37 shows a correct burner ame pattern. Fig-
ure 38 shows an incorrect burner ame pattern. The
incorrect burner ame pattern shows the ame higher
consistently higher than 1 inch above the logs.
If burner ame pattern is incorrect, as shown in
Figure 38
turn heater off (see To Turn Off Gas To Appli-
ance, page 20)
see Troubleshooting, page 24
Figure 37 - Correct Burner Flame Pattern

Yellow Tipping

Figure 38 - Incorrect Burner Flame Pattern