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Step 9: Burner Test and Adjustment
WHEN FLAME IS PROPERLY ADJUSTED:
There should be a flame at each burner port.
There should be no air gap between the flame
and burner port.
Install any loose components, such as burner caps
and grates, that may have been removed earlier. Be
certain that burner caps seat properly into the
burner bases. Before testing operation of the appli-
ance, verify that the unit and the gas supply have
been carefully checked for leaks and that the unit
has been connected to the electrical power supply.
Turn the manual gas shut-off valve to the open
position.
Test Rangetop Burners
Test Burner Ignition. Select a rangetop burner
knob. Push down and turn counterclockwise to HI.
The ignitor/spark module will produce a clicking
sound. Once the air has been purged from the
supply lines, the burner should light within four (4)
seconds.
Test Flame: High Setting. Turn burner on to HI. See
Figure 14 for appropriate flame characteristics.
If any of the rangetop burners continue to burn
mostly or completely yellow, verify that the burner
cap is positioned properly on the burner base, then
retest. If flame characteristics do not improve, call
Thermador®.
Test Flame: Low Setting. Turn burner on to LO.
Verify that the flame completely surrounds the
burner. There should be a flame at each burner port
and there should be no air gap between the flame
and the burner. If any burners do not carry over, call
Thermador®.
The two rangetop burners on the left side feature
XLO®, causing the flame to cycle on and off when
the knob is set to the XLO range. This is normal
operation.
Repeat the Ignition and Flame Test procedures,
described above for each rangetop burner and the
grill burner (if so equipped).
The gas grill uses a tube-style burner that has an air
shutter which allows adjustment to the amount of
the primary air inside the burner tube.
Air shutters of tube-style burners are pre-adjusted
at the factory, and usually do not require readjust-
ment except under rare conditions such as installa-
tion at high altitude.
If grill burner/flame adjustment is required, go to the
procedure: "Flame Adjustment (if necessary)".
Flame Characteristics
Yellow Flames:
Further adjustment is required.
Yellow Tips on Outer Cones:
Normal for LP Gas.
Soft Blue Flames:
Normal for Natural Gas.
If the flame is completely or mostly yellow, verify
that the regulator is set for the correct fuel. After
adjustment, retest.
Some orange-colored streaking is normal during
the initial start-up.
Allow unit to operate 4-5 minutes and reevaluate
before making adjustments.
FIG. 14