Thermador PROFESSIONAL PRO GRAND Serie Manual De Instrucciones página 12

Checking LP flame characteristics &
burner performance:
To observe the burner flames, remove the minimum
number of components necessary for an un-obstructed
view. It may be necessary to turn off lights or close window
blinds to darken the room for easier viewing of the flame.
1. Test Burner Ignition. Push in the burner control knob
and turn counter-clockwise (CCW) to "HI". The ignitor
electrode & 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.
• The LP flames should be stable, with no excessive
noise. The inner cones of the individual flames should
be well defined and distinctly separate from each other.
• Portions of the flame, along the burner, should not
exhibit excessive or continuous indications of "lifting" or
"lazy flame".
• It is normal for slight yellow tipping of the flames to
appear after a few minutes of operation using Propane
(LP) Gas. Orange-colored streaks in the flame are
produced from burning airborne debris; this is normal
during initial start up and should dissipate within a few
minutes of operation.
English 10
Dark Blue
S e c o n d a r y
Cone
Light Blue
Primary
Cone
2. Adjust the burner's control valve to "LO" or "SIM" to see
that the flame continues to wrap around the burner.
Blow out the flame, or use a quick fan motion from a
writing tablet or piece of cardboard to extinguish the
flame, and then observe the burner's ability to re-ignite
and wrap around ("carry-over") the burner within
several seconds. The flame "carry-over" is essential for
proper burner ignition and re-ignition.
3. Test re-ignition of the two Star
of the appliance by turning the control knobs to "XLO"
and observe the carry-over of the small simmer flames
®
as the XLO system cycles the two burners on and off.
• If the flame performance is not acceptable, verify that
the burner has the correct size LP orifice installed, and
that the regulator has been properly converted for LP
Gas.
• If the burner flame is uneven, flutters, makes excessive
noise, or lifts, some of the slots in the burner base may
be blocked with food spillage or other debris. Clogged
slots can be cleared using a straightened paper clip,
needle, or similar object. Hard-to-remove, encrusted
food or debris can sometimes be removed using a
steel wool pad or fine-wire brush.
• A flame that is "lazy", with excessively-long flames, can
be created by an in-correctly fitted burner cap. Many of
the outer mantles of the individual flames will tend to
"coalesce" or blend together.
4. Verify that the burner cap is seated properly on its
burner base. The cap should fit reasonably flat when
correctly-positioned in the base and not rock
significantly. (See illustration below.)
Correct Burner
Cap Placement
®
Burners on the left side
Incorrect Burner
Cap Placement