Thermador Pro Harmony Série Instructions D'installation page 21

®
Checking the STAR burner ignition and flame
1. Push in the burner control knob and turn it to HI.
• The igniter electrode and spark module will
produce a clicking sound. Once the air has been
purged from the supply lines, the burner should
light within four seconds.
• The flames should be stable, with no excessive
noise. The inner cones of the individual flames
should be defined and separate from each other.
Portions of the flame, along the burner, should not
exhibit excessive or continuous indications of
"lifting" or "lazy flame".
a a a
b b
c c
d d
NOTE: 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.
Yellow flames:
Further adjustment is
required.
Yellow tips on outer cones:
Normal for LP gas
Soft blue flames:
Normal for natural gas
a. Dark blue
b. Secondary cone
c. Light blue
d. Primary cone
2. Adjust the burner's control valve to LO 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.
Observe the burner's ability to reignite and wrap
around (also called "carry-over") the burner within
several seconds. This flame "carry-over" is essential
for proper burner ignition and re-ignition.
3. Test re-ignition of the XLO
over of the small simmer flames as the XLO system
cycles the burners on and off.
• If the low flame performance is not acceptable, it
may be necessary to readjust the valve screw for a
STAR burner that does not have sufficient carry-
over of the low flame. Turn the valve screw slightly
counter-clockwise until carry-over of the flame is
acceptable. (See "Setting the STAR® burner valve
screws" on page 22.)
• 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. Encrusted
food or debris can sometimes be removed using a
steel wool pad or fine wire brush.
• Burner flames that are "lazy", with excessively-
long flames, can be created by an incorrectly
fitted burner cap—from which many of the outer
mantles of the individual flames will tend to
"coalesce" or blend together. Verify that the
burner cap is seated properly on its burner base.
The cap should fit reasonably flat when correctly-
positioned on the base and not rock significantly.
Correct burner cap
4. Repeat the ignition and flame test procedures for
each rangetop STAR burner.
®
and observe the carry-
Incorrect burner cap
Page. 21