TM 5-3895-374-24-2FLAME SAFEGUARDe.Flame being monitored must completely cover the scanner field of view.f.To avoid nuisance shutdowns, it is important to avoid sighting hot refractory and to keep scannertemperature low (below 125 F) (50C).g.When the proper position has been established, drill a hole through the furnace wall and install a4" to 8" length of threaded 1/2"black iron pipe on which to mount the 48PT2 scanner.h.When satisfactory sighting position has been confirmed by operating tests, the sight tube shouldbe firmly welded in place.WiringAttach the cable supplied with the scanner to a junction box. Splice the cable wires to a pair of wires notsmaller than #18. Install the complete run in a separate conduit to the control. Continuous conduitbonding between scanner and the control is mandatory! Scanner may be located up to 100 feet fromcontrol. Do not pass scanner wiring through any junction box containing other wires. Do not run otherwires through scanner conduit. Asbestos insulated wire should be avoided.Keeping the Scanner CoolThe Infrared Scanner (Temperature Limit 125 F) should never get too hot to grasp comfortably in thehand. Keep the scanner cool by one or more of the following methods.1.Use 6" to 8" length of pipe between scanner and hot furnace front plate.2.Use insulating tube (Part No. 35-69) on the end of the iron pipe.3.Force air into sighting tube. Use Fireye Sealing Union (Part No. 60-801).4.Make sure sighting tube does not extend more than halfway into refractory wall.INSTALLATION - 45CM1 PHOTOCELL MOUNTThe 45CM1 photocell mount with #922 photocell and Rajah stud terminal, is designed for use in the blasttube on conventional atomizing oil burners. Two typical applications are shown below.page 3 - 1060
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