Eaton Crouse-Hinds L-850 A Instruction Manual

Document 9913Rev. VInstruction ManualStyle 3Runway Centerline Light L-850A & Touchdown Zone Light L-850B99.9 External Support Ring Gasket ReplacementEverytime a light fixture with the optional external support ring gasket is removed from the support ring, thegasket on the inner cover should be examined and replaced if necessary. Any gasket that is stretched, torn, hasa permanent set or some other defect, will allow water to enter the light base. Remove the old gasket from theinner cover by carefully scraping. Take care not to damage the inner cover. Form a thin bead of hightemperature silicone adhesive, such as GE RTV 106, on the inner cover sealing surface. Position the newgasket (P/N 21180) on the inner cover in the same location as the old gasket. Allow the silicone to cure for 4 to12 hours. Cure times depend on the amount of silicone use, ambient temperature, and relative humidity. Applya thin coat of Dow Corning FS 1292 grease over the entire outside surface of the gasket before placing in thesupport ring. Secure per section 8.2WARNING:WARNING Do not exceed 20 psi when pressure testing the fixture. Serious injury and/orpermanent damage to the fixture may result if a higher air pressure is used. Oncethe pressure test is complete be sure to relieve the air pressure.9.10 Cleanliness and WorkmanshipService life depends upon the entire assembly being waterproof. All surfaces must be clean, dry and free of allforeign matter if the light fixture is to operate for extended periods without requiring maintenance.9.11 Maintenance ProgramIn order to insure maximum light fixture life, the installed units should be subject to a maintenance program inaccordance with the following:A daily operation check should be made of the lighting fixture. The lights should be energized and visuallyinspected. If any lamps are out, the location of the fixture should be recorded and the lamps replaced at a timewhen the circuit is de-energized. (See Section 9.2 )