Testing Rangetop Burner Ignition; Testing Ignition For Hi, Medium, And Low Settings; Testing Ignition For Xlo Setting; Adjusting Grill Burner Flame With The Air Shutter - Thermador Pro Grand PRD304EG Service Manual

Service Manual for Thermador Pro Grand Dual Fuel Ranges:

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).
58300000157422_ARA_EN_A
PRD304EG, PRD364EDG, PRD364EDPG, PRD364ELG, PRD366EG, PRD366EPG, PRD484ECG, PRD484EEG, PRD486EDG, PRD486EDPG, PRD486ELG
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 Grill
Components – Removal and Replacement, page 32).
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
Replacement, page 32).
5. Test to evaluate the flame characteristics.
6. Repeat procedure as needed until flame characteristics are
optimal.
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