TM 5-3895-374-24-2FLAME SAFEGUARD8.Proven types of flame grounding adapters, as shown below, may be used to provide adequategrounding surface. High temperature stainless steel should be used to minimize the effect of metaloxidation. This assembly may be welded directly over the pilot or main burner nozzle.MAINTENANCEType 48PT2 Infrared and Type UV1, UV2, 45UV5 Ultraviolet and 45CM1 Photoelectric ScannersThe viewing area of the scanner must be kept clean. Even a small amount of contamination will reducethe flame signal reaching the detector by a measurable amount. Wipe the viewing area routinely using asoft 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 RodThe flame rod and its insulator should be kept clean by washing routinely with soap and water. Rodsshould be routinely replaced as they oxidize.Flame Signal StrengthRoutine observation of the flame signal strength will forewarn any deterioration in the capability of theflame detector or its application.ContactsThere are no accessible contacts in the FLAME-MONITOR. Where contacts are used, their designassures long trouble-free life when the load circuits are maintained within the published load ratings.Electrical NoiseIn areas of excessive electrical noise, the installation of an electrical noise suppressor (P/N 60-2333) tothe power supply at the control circuit may be helpful.HumidityIn areas of high humidity, the control chassis should be removed and placed in a dry atmosphere whenthe system is expected to be out of service for an extended period.Periodic Safety CheckIt is recommended that a procedure be established to test the complete flame safeguard system at leastonce a month,. This test should verify the proper operation of all limit switches and safety interlocks aswell as flame failure protection and fuel safety shutoff valve tightness.RotationIt is recommended that control and scanner units purchased as spares be installed periodically.(page 3 - 1062)
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