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Service Manual for Thermador Pro Grand Dual Fuel Ranges:
PRD304EG,
PRD364EDG, PRD364EDPG, PRD364ELG, PRD366EG, PRD366EPG, PRD484ECG, PRD484EEG, PRD486EDG, PRD486EDPG, PRD486ELG
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Page 14 of 95
3.4 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 Testing Ignition for 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.
3.4.2 Testing Ignition for 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.
3.5 Adjusting Grill Burner Flame with the Air Shutter
[Models with grill only]: The grill’s gas burner has an air shutter
system that is factory pre-set to burn optimally, but depending on the
quality of the gas available, may require adjustment (see Figure 15).
Figure 15: Typical Air Shutter
1 Air
shutter
2 Adjustment
screw
3 Opening
1. First remove the grill burner from the grill burner box (see
.
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.
4. Re-install the grill burner (see
Grill Components – Removal and
page
)
.
5. Test to evaluate the flame characteristics.
6. Repeat procedure as needed until flame characteristics are
optimal.