Testing Rangetop Burner Ignition; Testing The Hi, Medium, And Low Settings; Testing The Xlo Setting; Testing Broil Burner Ignition - Thermador PRL304EG Service Manual

Service Manual for Thermador Pro Grand LP Gas Ranges, Models: PRL304EG, PRL364EDG, PRL364ELG, PRL366EG, PRL484ECG, PRL486EDG, PRL486EDPG, PRL484ELG

3.4 Testing Rangetop Burner Ignition

3.4.1 Testing Rangetop Burner Ignition
Ignition Hazard
Do not touch the rangetop burners when the igniters are sparking.
For each burner, push the control knob in and then turn counter-
clockwise to HI. The igniter should produce a clicking sound as the
burner is sparking, and the burner should light within four seconds.
3.4.1.1

Testing the HI, Medium, and Low Settings

Set the burner knob to HI, and observe flame characteristics
(see Figure 13 and Figure 14). If any burner flame burns primarily
yellow, verify if the burner cap is positioned properly on the burner
base, and then re-test. Repeat test for MEDIUM and SIM settings.
If flame characteristics do not improve, call Thermador technical
support at (800) 444-9091.
3.4.1.2

Testing the XLO Setting

The left-front and left-back burners have the XLO feature. Set the
burner knob to a setting between SIM to XLO and observe if the flame
cycles correctly – it should be on for approximately 8 seconds, and
then off for approximately 52 seconds of each minute.
3.4.2

Testing Broil Burner Ignition

Set the mode to BROIL. After 15 - 50 seconds (depending on the
model) the burner should ignite. The broiler burners do not have an air
shutter, and no adjustment is necessary.
3.4.3

Testing Bake Burner Ignition

Set the oven to BAKE at 350°F. After 15 - 50 seconds (depending on
the model) the burner should ignite and stay lit until 350°F is reached.
Then it should shut off. From this point forward, the burner should
cycle on and off to maintain the temperature.
58300000156573_ARA_EN_B

3.5 Adjusting Bake Burner Flame with the Air Shutter

The bake burner has an air shutter system (see Figure 15) that is
factory pre-set to burn optimally, but depending on the quality of the
gas available, may require adjustment.
Figure 15: Typical Air Shutter
1 Air shutter
2 Adjustment screw(s)
3 Opening
Adjust the bake burner air shutter by doing the following:
1. First remove the bake burner from the burner box. For the large
oven, see Replacing the Bake Burner – Large Oven, page 97. For
the small oven, see Replacing the Bake Burner – Small Oven,
page 105.
2. Loosen the adjustment screw, and then rotate the air shutter to
modify the opening as follows:

If the flame is lifting or blowing, or is not carrying over, rotate
the shutter clockwise to set the opening to a more closed
position.

If the flame is too yellow, rotate the shutter counter-clockwise
to set the opening to a more open position.
3. Tighten the adjustment screw.
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