Eaton Crouse-Hinds L-850 A Instruction Manual

Document 9913Rev. VInstruction ManualStyle 3Runway Centerline Light L-850A & Touchdown Zone Light L-850B4CAUTION:CAUTION Never handle the light assembly by the leads as this can break the waterproof seal.8 Installation8.1 InstallationThe Style 3 RCL and TDZ light units are shipped complete, including the lamp(s), and are ready for installationas received. Installation of the light unit is to be done with primary POWER OFF and SECURED. Ateach light location, install a steel, Size B, 12 inch deep minimum, L-868 Light Base per FAA AC 150/5340-4(latest revision). Install the light base with two opposite bolt holes perpendicular to the runway centerline. Placethe properly sized isolation transformer(s) in the light base and make necessary primary power connectionsusing L-823 connectors. The RCL light unit requires either two 45 watt, 6.6A secondary transformers for thetwo lead version, or one 100 watt, 6.6A secondary transformer for the single lead version. The TDZ light unitrequires one 45 watt, 6.6A secondary transformer. Verify that the mounting flange on the light base is clean andthe o-ring (optional on deep cans) is coated with Dow Corning FS 1292 grease and is in place on the light base.Connect the plug(s) from the light unit to the secondary(ies) of the previously installed isolation transformer(s).Installation tool, Crouse-Hinds P/N 19999, will ease in the installation and removal of the light unit (See Figure2). The threaded eyebolts on the lifting tool screw into threaded holes in the light fixture. Lower the light unitstraight down onto the base. The light fixture is subject to optical misalignment or mechanical damage if notseated properly. Verify the light beam(s)/color(s) are properly orientated for the individual location. Secure thelight fixture to the base per section 8.28.2 Installation Bolt Torque• Use fully threaded, 3/8-16 bolts meeting requirements of FAA EB83A. (P/N 21716 isrecommended.)• Use Heico-Lock or Nord-Lock stainless steel lock-washers per FAA specifications*.• Mounting base holes must be degreased, cleaned, and dried prior to bolt installation.• Base-to-fixture mating surfaces must be degreased, cleaned, and dried prior to installation.• Apply marine grade anti-seize (K=.18) per manufacturer’s instructions to each bolt.• Install the 3/8-16 bolts with lock-washers per lock-washer manufacturer’s guidelines.• See Section 8.3 for Heico-Lock installation guidelines (2014)• Achieve a full final torque of 28 FT-LBS (37.9 N-m) ±10% with a calibrated torque wrench.• Impact wrenches are not recommended as installation tools.• Check torque and re-torque all bolts within 2 weeks of initial installation.• Maintain all bolts by checking and re-torqueing per FAA specifications*.• If any lubricants or thread locking compounds are used (not recommended), torque must berecalculated based on K factor provided by lubricant or compound manufacturer.• New bolts and lock-washers shall be used each time a light unit is removed from its base.*Refer to the following specifications for FAA installation and maintenance recommendations:• AC150/5340-26 “Maintenance of Airport Visual Aids”• AC150/5345-46 “Specification for Runway and Taxiway Light Fixtures”• FAA Engineering Brief No. 83A “In-pavement Light Fixture Bolts”