Azbil AUR355, Руководство пользователя

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Chapter 5. Trial Operation and Adjustment
z Ignition spark response
WARNING
Make sure that the AUD flame detector does not detect ultraviolet rays from a source other
than the burner. If the AUD detects other ultraviolet rays, it will continue to send flame
detection signals even if the burner flame goes out. Consequently, fuel will continue to be
supplied, potentially resulting in an explosion.
Before doing the spark response test, make sure that all manual fuel valves are closed.
(1) Close the manual valves in the piping for the pilot and main burners.
(2) Begin equipment operation and measure the flame voltage during the pilot
ignition sequence to check for any effect from the ignition spark.
(3) If the spark has an effect, such as causing the flame LED of this device to
light up, refer to the user’s manual for the combustion equipment and make
adjustments in the following way.
•
Move the AUD flame detector or the flame rod so that the spark does not affect
the flame voltage.
•
Attach a shield that prevents the spark’s ultraviolet radiation from entering the
optical path of the AUD flame detector. Adjust so that the spark’s effect on the
flame signal is no more than 0.4 V DC.
•
If an S7200A_ _ _GH_ or S720A_ _ _GH_ igniter is used, swap the polarity
of the power to the igniter. When this device is used in combination with an
igniter, changing the polarity of the power can prevent the AUD flame detector
from detecting the spark.