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Ignition spark response test
This test should be carried out on any equipment that uses an ultraviolet flame
detector. The test is to check that the ultraviolet flame detector does not respond to
UV rays emitted from the ignition spark.
●
AUD100 series advanced ultraviolet flame detector
Carry out the following test to check that the
AUD100
series advanced ultraviolet
flame detector or flame rod does not respond to the UV rays emitted from the igni-
tion spark (so that the FLAME LED does not light up).
(1) Close the manual fuel valves to the pilot and main burners.
(2) Start the combustion equipment and measure the flame voltage in the pilot igni-
tion sequence to check whether or not there is an effect on the flame voltage.
(3) If the FLAME LED is lit, make adjustments using the following procedure
while referring to the equipment user’s manual.
• Move of the
AUD100
series or flame rod so that there is no effect.
• Put a shielding plate in the optical path of the
AUD100
series so that the effect
of the spark on the flame voltage is 0.4 Vdc or less.
Chapter 3. ADJUSTMENTS FOR TRIAL OPERATION
CAUTION
Make sure that the flame detector does not detect the ignition spark. If the
flame detector can detect the spark, change the detector's line of sight or
change the ignition electrode's position.
Make sure the flame detector does not detect ultraviolet rays other than those
of the burner flame. If the flame detector responds to other ultraviolet rays, it
will report that there is a flame even if the burner flame goes out. As a result,
fuel will continue to be discharged, causing a very serious explosion hazard.
