Thermador PRG304GH Manuel De Montage

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English 16
Step 9: 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 manual gas shut-off valve to the open 
position. 
Test Rangetop Burners 
Test Burner Ignition. Select a rangetop burner knob. 
Push in 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 10 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 SIM. 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 far left burners feature XLO, that causes 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. 
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. 
Test Oven Burners
Remove the oven bottom cover. Remove the 4 screws 
on the sides and the 2 screws on the back, then slide the 
cover forward while lifting to clear the angled baffle plate 
mounted to the bottom of the cover. 
Test Bake Burner Ignition 
Set the oven to BAKE at 350°F. After 30-75 seconds, the 
burner will ignite. The burner will stay lit until 350°F is 
reached and then shut off. From this point forward, the 
burner will cycle on and off to maintain the temperature. 
 Figure 10:  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 re-evaluate
before making adjustments.