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INSTALLATION - 69ND1 FLAME  ROD
Mounting UV1A/UV18

TM-5-3895-374-24-2 M081 Asphalt Mixing Plant Manual
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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. (page 3 - 1062)







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