Thermador PRD30 Installation Manual page 23

Step 10: Burner Test and
Adjustment
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 appliance, 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 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 16 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 travels completely around the burner. This is
known as "carry over." 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 that
causes the flame to cycle on and offwhen the knob is set to
the XLO range. This is normal operation.
Repeat these Ignition and Flame Test procedures for each
rangetop burner.
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 re-evaluate
before making adjustments.
Figure 16: Flame Characteristics
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.
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