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117437-01D 23
INSPECTING BURNERSThermocouple
Thermopile
1/4"
Pilot.Burner
Piezo
Ignitor
Figure 38 - Pilot Assembly
(Millivolt Ignition System)
3/8".to.1/2"
Sensor.
Rod
Pilot.
Burner
Piezo
Ignitor
Figure 39 - Pilot Assembly
Electronic Ignition System)
Check pilot ame pattern and burner ame
patterns.often.
PILOT ASSEMBLY
The.pilot.assembly. is. factory. preset. for.
proper ame height. Alterations may have
occurred.during.shipping.and.handling.. Call.
a qualied service person to readjust the pilot
if.necessary.
The position and pattern of pilot ames in rela-
tion.to.sensing.devices.should.be.as. shown.
in.Figures.38.and.39.respectively.
Pilot ame may need adjustment in order
for thermocouple, thermopile and/or ignition
system to sense pilot ame.
If.your.pilot. assembly. does. not. meet. these.
requirements:
• turn replace off (see To Turn Off Gas to
Appliance, page 20 or 21)
•. see. sections. under. Troubleshooting,
page.25
Figure 40 - Typical Flame Pattern
Figure 41 - Adjusting Air Setting
AIR ADjUSTMENT SETTING
The.main.burner.air.shutter.opening.is.factory.
set.to.the.following:
Natural Gas - 1/8", Propane/LP Gas - 3/4"
Air shutter may require adjustment depending
on altitude, venting condition, burner opera-
tion and general ame appearance.
If ames are lifting or sooting shutter may
require opening. If ames are too blue or im-
properly.lighting.shutter.may.require.closing..
See Figure 41 for proper air adjustment.
IMPORTANT:.Do.not.reduce.air.shutter.open-
ing.any.lower.than. designed.minimum.stop.
setting.of.1/8".
1/8".Minimum.
Air.Opening
Air.
Shutter
Burner.
Tube
Adjustment
Screw
BURNER FLAME PATTERNS
Burner ames will be steady, not lifting or
oating. Flame patterns will differ from unit
to.unit.and.will.vary.depending.on.installation.
type.and.weather.conditions.
If vent conguration is installed incorrectly,
ames will lift or “ghost”. This can be danger-
ous. Inspect ames after installation to ensure
proper.installation.and.performance..Figure.40.
shows a typical ame pattern.
If burner ame pattern differs from that de-
scribed:
• turn replace off (see To Turn Off Gas to
Appliance, page 20 or 21)
•. see.Troubleshooting, page 25