Eaton Crouse-Hinds L-850 A Instruction Manual

Document 9913Rev. VInstruction ManualStyle 3Runway Centerline Light L-850A & Touchdown Zone Light L-850B37 General Description7.1 Runway Centerline Light, L-850AThe Crouse-Hinds Style 3 Runway Centerline Light is an ITS verified FAA L-850A per FAA AC 150/5345-46(latest revision). It is designed for installation at the centerline of runways or any other location where visualguidance of moving aircraft or ground vehicles is desirable. The fixture is designed to fit on a FAA L-868, steel,Size B light base per FAA AC 150/5345-42(latest version), and have a total height above grade/ground level of .250 inch. The fixture is bi-directional, projecting two beams of light 180° apart. It is weatherproof and willendure roll over loads without damage. The light fixture consists of a ductile iron support ring and a removablealuminum optical assembly. The ductile iron ring is mounted to a light base with six bolts (3/8-16 UNC x1½ lg.,stn. stl.) and 2 piece washers (3/8, stn. Stl.). The aluminum optical housing is secured to the ductile iron ringusing two high-strength bolts and two high-strength shear pins. The optical housing has a die cast inner coverthat is attached using 4 screws. A polyurethane o-ring is used to provide a watertight seal between the innercover and the optical housing (see section 9.3). An optional silicone gasket is bonded to the outside of the innercover to provide a watertight seal between the optical assembly and the ductile iron support ring. Two 48-watt,MR-16 lamps are secured to two brackets, which are fastened to the bottom housing. Electrical connections aremade at either one or two feed-thru assemblies in the inner cover. The feed-thrus have ITS verified L-823 plugsfor connecting to FAA L-830/ L-831 Isolation Transformers. Lenses are held into the aluminum housing with abracket, gasket, molded elastomeric boot and two screws. Red dichroic-coated lenses are available from thefactory, or may be installed in the field. All hardware is type 18-8 stainless steel. The complete light unit is11.94 inches in diameter, 3.63 inches deep, and weighs 20 lbs.7.2 Touchdown Zone Light, L-850BThe Crouse-Hinds Touchdown Zone Light is an ITS verified FAA L-850B per FAA AC 150/5345-46 (latestrevision). Except for being unidirectional, its design is identical to the L-850A described in section 7.1. Toe-inof the light beam is obtained internally by alignment of the lamp bracket holes and the corresponding holes inthe bottom housing. The toe-in direction orientation can be straight, toe-left or toe-rightToe-Left Straight Toe-RightFigure 1