Inspecting Burners; Cleaning And Maintenance - Desa O36NRA Owner's Operation And Installation Manual

Check pilot flame pattern and burner flame
patterns often.
PILOT ASSEMBLY
The pilot assembly is factory preset for the proper
flame height. Alterations may have occurred dur-
ing shipping and handling. Call a qualified service
person to readjust the pilot if necessary.
The height of the thermopile must be 3/8" to
1/2" above the pilot flame as shown in Figure
18. The thermocouple must be at a height of
about 1/8" above the pilot flame. The flame
from the pilot burner must extend beyond both
the thermocouple and thermopile.
If you pilot assembly does not meet these
requirements:
• turn fireplace off (see To Turn Off Gas to
Appliance, page 12).
• see Troubleshooting, page 15.
BURNER FLAME PATTERN
Figure 19 shows correct burner flame pattern.
NOTICE: Do not mistake orange
flames with yellow tipping. Dirt
or other fine particles are burned
by appliance, causing brief
patches of orange flame.
If burner flame pattern is incorrect, as shown
in Figure 20
• turn appliance off (see To Turn Off Gas to
Appliance, page 12).
• see Troubleshooting, page 15.
WARNING: Turn off appliance
and allow to cool before cleaning.
CAUTION: You must keep con-
trol areas, burners and circulat-
ing air passageways of fireplace
clean. Inspect these areas of
fireplace before each use. Have
fireplace and chimney (if appli-
cable) inspected yearly by a quali-
fied service person. Fireplace may
need more frequent cleaning due
to excessive lint from carpeting,
bedding material, etc.
124868-01A

INSPECTING bURNERS

CLEANING AND MAINTENANCE

www.desatech.com
Thermopile
3/8" to 1/2"
Piezo
Ignitor
Figure 18 - Pilot Assembly
Figure 19 - Correct Burner Flame Pattern
Figure 20 - Incorrect Burner Flame
Only limited cleaning will be required under
normal use of this appliance. Dust the front
grate and top of receiver/valve. Do not use
cleaning fluids to clean logs or any other part
of the appliance.
If, after a period of use, the flames start to
exhibit unusual shapes and behavior or the
burner fails to ignite smoothly, then the burner
holes may require some cleaning. If this hap-
pens, we recommend that you contact your
nearest authorized service technician to get
the appliance serviced.
• Keep area around log set clean and clear
of debris.
• Periodically inspect the air mixer and burner
tube for foreign matter blocking the air inlet
and flame holes.
Pilot Burner
Thermocouple
Yellow Flames with
Orange Streaks
Dark Orange
Flames
Pattern
1/8"
13