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Size of monitoring pipe
For the detector to receive the optimal amount of UV radiation,
its field of vision should be as wide as possible. To that end, do
the following:
(1) Use the widest monitoring pipe possible, at least 50 to
80 A, and connect the AUD100/110 with a reducer.
(2) Make the monitoring pipe as short as possible. (However,
remember that the ambient temperature of the
AUD100/110 should not exceed 120 °C.)
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Mounting space
Leave sufficient space to allow easy maintenance and
inspection.
Adjustment and inspection
After wiring, do the following checks.
(1) Using the FSP136A100 Analog Flame Meter
•
If measuring the flame current:
Insert the flame current measurement plug of the
FSP136A100 into the flame current measurement jack of the
burner controller.
•
If measuring the flame voltage:
Connect the red and black flame voltage measurement
probes from the FSP136A100 to the + and - flame voltage
output terminals respectively on the burner controller.
(2) Check the operation of the AUD100/110 by exposing the
AUD15 to a lighter flame or to ultraviolet rays from an ultra-
violet lamp.
Handling Precautions
•
Before using an open flame, check that there is no flam-
mable gas in the vicinity.
(3) Mount the AUD100/110 on the monitoring pipe temporarily.
(4) Light the burner.
(5) To determine the optimal monitoring position, measure the
flame current/voltage with the FSP136A100 analog flame
meter while slowly moving the monitoring pipe. Select
the position with the highest possible stable flame current
and voltage which is also within the specified range for the
burner controller.
Fluctuation of the reading within the width of the indicator
needle is OK.
For the specified flame current and voltage range for the
burner controller, see the manual of the burner controller.
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Pilot burner turndown test
WARNING
If the flame detector is set so that it detects a pilot
flame that is too small to ignite the main flame, the
AUD100/110 will not be able to recognize (for example)
a flame failure in the main burner. In this case fuel would
continue to be supplied, causing a serious explosion haz-
ard. To prevent this, be sure to do the pilot turndown test
carefully.
If it is necessary to do this test repeatedly, completely
shut down all equipment each time the test is finished,
and completely discharge unburned gas or oil that has
accumulated in the ducts and combustion chamber. If un-
burned gas or oil is not expelled completely, an explosion
may occur.
CAUTION
This test should be done only by a trained and experi-
enced professional.
The purpose of this test is to determine whether, under the least
favorable conditions of gas pressure and air pressure, a pilot flame
detected by the flame detector will reliably light the main burner. For
the procedure of the pilot turndown test, follow the instructions in
the burner controller manual or equipment manufacturer manual.
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Ignition spark response test
WARNING
Make sure that this device does not detect ultraviolet
rays other than those of the burner flame. If it does, a
false flame signal will endanger combustion safety.
Make sure that the flame relay (normally relay 2K) is not af-
fected by the spark generated by the ignition transformer.
This test examines whether this device responds to ultraviolet
rays of the ignition transformer.
For the procedure of the ignition spark response test, follow
the instructions in the burner controller manual or equipment
manufacturer manual.
Final mounting of the monitoring pipe
•
When the equipment is operating properly with the specified
flame voltage output after all adjustments have been completed,
turn OFF the power to the equipment, remove the AUD15 and
AUD100/110, and weld the monitoring pipe permanently.
•
Mount the AUD15 and AUD100/110 on the monitoring pipe
and do all of the wiring.
•
As a guideline for mounting, tighten the nut 1 quarter turn
after contacting the edge of the mounting pipe and the packing
for the nut. Then, check the tightness, include the welding part
of the mounting pipe using a tightness test, etc.
Label attachment
Attach the effective operation time label to a place where it can be
seen easily. Attach the expiration date label to the socket.
Final inspection
To ensure proper burner control, do a trial run of at least one
complete operation cycle of the combustion equipment to verify
that all control operations function correctly.
MAINTENANCE AND INSPECTION
CAUTION
The effective life of the AUD15 is a total of 25,000
hours of use or 5 years (from the date indicated by
the date code on the model No. label).
Be sure to replace it with a new Tube Unit within this
period.
Note. The effective life is the time when UV sensor de-
tects a flame.
Take special care in handling the AUD15 to avoid im-
pact and shock.
When transporting or storing the AUD15, be sure to
put it in a secure packing box.
Maintenance and inspection work for the model
AUD15 and model AUD100/110
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Flame failure test
To check that the flame safeguard control device works prop-
erly, do the flame failure test regularly.
During normal burner combustion, block the monitoring pipe
window so that there is no flame signal, or else cut off the fuel
at the source to extinguish the burner flame. Check that the
flame failure is detected and that the main valve and pilot valve
are closed.
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Flame signal check
Regularly check the flame signal from the burner controller
that is used for batch operation. For the method of checking,
see the user’s manual for the burner controller.
