LG LRG30855ST Technical Service Manual page 40

Maintop Burner Alignment
For proper operation of the burner, alignment of
the orifice holder, orifice, and air/gas mixer tube
must be correct. The alignment can be checked
by placing 7-mm or / -in. nut-driver over the
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orifice to exaggerate the angle. The nut-driver
should stand straight, indicating the alignment
and gas injection angle is correct. A slight
downward pressure may be necessary to seat the
nut-driver over the orifice-retainer ring.
If an angle adjustment is necessary remove the
burner cap, head, and bowl to inspect the orifice
holder and the brackets that hold them in place.
Adjust as necessary by carefully bending the
supply tube. A misaligned burner may result in
uneven flames around the burner head.
Maintop Burner Flame Adjustments
The top burners do not have air shutters and
fixed, non adjustable orifices are used. If the
flames blow off the burner or have yellow tips,
check the following:
• Gas pressure: 5" Natural gas 10" LP gas.
• Inspect orifice to be sure it is drilled on center
and free of debris or burrs.
• Be sure the correct size orifice is in the proper
location (see "Orifice Identification" section of
this sheet).
• Make sure the range was properly converted
if on LP gas.
Low Flame Simmer Adjustments
Remove the surface control knob and locate
the adjustment screw in the center of the
control valve shaft. A thin flat-blade screwdriver,
approximately -in. across, is needed to access
/
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the screw. Turn the adjustment screw until the
flame reaches the desired size.
Note: Low setting adjustments must be made
with 2 other burners in operation on a medium
setting. This procedure prevents the low flame
from being set too low, resulting in the flame
being extinguished when other burners are turned
on.
Testing the Flame Stability
Test 1: Turn the knob from HI to LOW quickly. If
the low flame goes out, increase the flame size
and test again.
Test 2: With the burner on LOW setting, open
and close the oven door quickly. If the flame is
extinguished by the air currents created by the
door movement, increase the flame height and
test again.
Test 3: With 2 burners on HIGH setting, set a
third adjusted burner on LOW. Turn the first knob
from HI to LOW quickly. The third burner should
stay lit.
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