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Chapter 6. MAINTENANCE AND INSPECTION
zMounting the tube unit and cover
(1) Turn OFF the power to the burner controller.
(2) After 1 minute or more, mount the tube unit onto the shutter unit,
holding the back of the tube unit, and tighten the 2 retaining
screws to secure the unit.
(3) Make sure that the O-ring has not come off the flange unit.
(4) Attach the cover, and tighten the 4 mounting screws to secure it.
Handling Precautions
•
The tube unit has polarity. Correctly mount the tube unit on
the shutter unit according to the “F” and “G” shown on the po-
larity indication label on the top of the shutter unit. The shut-
ter unit has a stepped surface which fits that of the tube unit.
For that reason the tube unit cannot be mounted the wrong
way. Do not attempt to force it.
•
If the thermolabel attached to the tube unit has changed color
from white to black, the temperature may have exceeded the
operating temperature range. If the ambient temperature
of the Advanced Ultraviolet Flame Detector is too high, cool
down the device using air purging or the like. The thermolabel
gives only a rough estimate of the temperature. Check the cor-
rect ambient temperature using a thermometer.
•
When mounting the cover, mount the O-ring of the flange unit
firmly. Failure to do so may cause the sealing ability to lower.
•
Tighten the terminal screws and mounting screws with a tight-
ening torque of 0.7N·m.
zExpiration date label
Affix the expiration date label supplied with the AUD Maintenance
Kit to the cover as shown below.
Position of the expiration date labelExpiration date label
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