52
MAINTENANCE
Type 48PT2 Infrared and Type UV1A, UV2 and 45UV5 Ultraviolet Scanners
The viewing area of the scanner must be kept clean. Even a small amount of contamination will
reduce the flame signal reaching the detector by a measurable amount. Wipe the viewing area rou-
tinely using a soft cloth dampened with concentrated detergent.
— Type 48PT2 Scanners include a replaceable #4-263-1 Firetron cell.
— Type 45UV5 Scanners include a replaceable #4-314-1 UV tube.
Type 69ND1 Flame Rod
The flame rod and its insulator should be kept clean by washing routinely with soap and water. Rods
should be routinely replaced as they oxidize.
Flame Signal Strength
Routine observation of the flame signal strength will forewarn any deterioration in the capability of
the flame detector or its application.
Contacts
There are no accessible contacts in the MicroM. Where contacts are used, their design assures long
trouble-free life when the load circuits are maintained within the published load ratings.
Humidity
In areas of high humidity, the control chassis should be removed and placed in a dry atmosphere
when the system is expected to be out of service for an extended period.
Periodic Safety Check
It is recommended that a procedure be established to test the complete flame safeguard system at
least once a month. This test should verify the proper operation of all limit switches and safety inter-
locks as well as flame failure protection and fuel safety shutoff valve tightness.
Rotation
It is recommended that control and scanner units purchased as spares be installed periodically to
ensure proper operation.
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