Monitoring of both pilot flame and main flame (continuous pilot or intermittent pilot) ●
Mount this unit so that the unit monitors an area where the pilot flame intersects
the main flame.
Monitoring of only main flame (interrupted pilot) ●
Mount this unit so that it monitors the most stable part of the main flame under
any conditions (low combustion, high combustion, etc.).
In special cases, the use of two units is recommended in order to separately monitor
high combustion and low combustion.
Monitoring of pilot flame and main flame individually (continuous pilot or intermittent pilot) ●
Mount the AUD300C so that the sensor for monitoring the main flame does not
mistakenly detect the pilot flame. If the sensor for the main flame detects the pilot
flame, the fuel supply will not be shut down if the main burner fails, since the flame
failure will not be detectable.
Multiple burners existing in one combustion chamber ●
Mount this unit on each burner and carry out the mounting work so that the unit
does not detect the flame of other burner incorrectly.
Additionally, the tube unit of this unit may produce the electrical discharge phe-
nomenon inside the tube. This electrical discharge may emit the ultraviolet rays
from the tube. Therefore, when using multiple units, adjust their positions so that
the ultraviolet ray radiation from other tube unit is not detected.
Redundant system (duplicate monitoring) ●
To increase the reliability of the system and avoid unnecessary shut-off as much as
possible, this unit is combined with the burner controller and the redundant system
is constructed so that two sets monitor the flame of one burner.
If either flame detector does not output the flame signal or if any dummy signal ex-
ists, the alarm is given, but the system continues the combustion.
If two burner controllers detect the flame failure at the same time, the system must
be shut-off.
This avoids any unnecessary shut-off of the system caused by this unit, burner con-
troller, or oscillating flame. The highly reliable flame monitor can be achieved.
Mounting position n
Determine an optimal mounting position of this unit while carefully observing the
following items:
Temperature ●
Mount this unit in a place where the ambient temperature during operation is -20
to +100 °C (up to 120 °C during flame detection).
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