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Check pilot flame pattern and burner flame
patterns often.
PILOT ASSEMBLY
The pilot assembly is factory preset for proper
flame height. Alterations may have occurred
during shipping and handling. The pilot is
located on the back right hand side of the
burner.
The thermocouple should be fully enveloped
in flame. The flame should not be lifting off of
thermocouple element.
If your pilot assembly does not meet these
requirements:
• Access pilot adjustment screw through
slot in valve cover. Turn adjustment screw
clockwise to decrease or counterclockwise
to increase the flame to proper size (see
Figure 11, page 9). Do not remove adjust-
ment screw.
• see Troubleshooting, page 13
Pilot
Figure 17 - Correct Pilot Flame Pattern
• Keep the area around the log set clean and
clear of debris.
• Occasionally, you may use a soft bristle
brush to clean logs.
• Periodically inspect the air mixer and burner
tube for foreign matter blocking the air inlet
and flame holes.
SERVICE HINTS
When Gas Pressure is Too Low
• pilot will not stay lit
• burners will have delayed ignition
• heater will not produce specified heat
• propane/LP gas supply may be low
You may feel your gas pressure is too low. If
so, contact your local natural gas supplier.
12
INSPECTING bURNERS
Thermocouple
CLEANING AND MAINTENANCE
www.desatech.com
BURNER FLAME PATTERN
Burner flames will be steady, not lifting or
floating. Flames should go up through middle
of logset. Flames should not "spill" to edges
of pan or sides of logset.
Figure 18 shows a typical flame pattern. If
burner flame pattern differs from that de-
scribed:
• turn appliance off (see To Turn Off Gas to
Appliance, page 11)
• see Troubleshooting, page 13
Figure 18 - Typical Flame Pattern
• Once every year a qualified agency or certi-
fied chimney sweep should examine and
clean the venting system of the fireplace.
TECHNICAL SERVICE
You may have further questions about installa-
tion, operation, or troubleshooting. If so, con-
tact DESA Heating, LLC at 1-866-672-6040.
When calling please have your model and
serial numbers of your heater ready.
You can also visit DESA Heating, LLC's web
site at www.desatech.com.
124184-01B
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