TM 5-3895-374-24-2
FLAME SAFEGUARD
8.
Proven types of flame grounding adapters, as shown below, may be used to provide adequate
grounding surface. High temperature stainless steel should be used to minimize the effect of metal
oxidation. This assembly may be welded directly over the pilot or main burner nozzle.
MAINTENANCE
Type 48PT2 Infrared and Type UV1, UV2, 45UV5 Ultraviolet and 45CM1 Photoelectric 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 routinely using a
soft cloth dampened with concentrated detergent.
Type 48PT2 Scanners include a replaceable #4-263-1 Firetron cell.
Type 45CM1 Scanners include a replaceable #4-230 Phototube #922.
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 FLAME-MONITOR. Where contacts are used, their design
assures long trouble-free life when the load circuits are maintained within the published load ratings.
Electrical Noise
In areas of excessive electrical noise, the installation of an electrical noise suppressor (P/N 60-2333) to
the power supply at the control circuit may be helpful.
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 interlocks 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.
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