L-852A-D, J & K ITCF, F-Range, ICAO LED Taxiway Centerline Light
96A0460 Rev. C
L-868 base can installation (load bearing)
© ADB Airfield Solutions All Rights Reserved
34
3.2 L-868 base can
installation (load
bearing)
Following are specific requirements to insure that an in-pavement fixture is properly installed.
Make sure that the fixture is completely assembled.
Make sure that the fixture has been operationally tested.
Verify that a certified L-868 base can that has been listed in FAA AC 150/5345-53D,
Appendix 1 Addendum is being used.
Verify that the number of spacer rings is not in excess of the requirements defined in
FAA AC 150/5340-30,
Design and Installation Details for Airport Visual Aids
.
Insure that all base can mounting surfaces are flat and free of dust, dirt or debris. Use
compressed air or a solvent spray to remove debris prior to installation. Use safety glasses to
prevent injury from any flying debris or solvent.
Inspect the threads in the light base upper flange to insure that the threads are clean and
corrosion free. If necessary, use a wire brush to clean the holes or use compressed air or a
solvent spray to remove debris prior to the insertion of any mounting bolts. Use safety
glasses to prevent injury from any flying debris or solvent.
If the base can threads are damaged, use a tap to attempt to restore them. If the threads are
severely damaged and will not allow the proper torque, use an appropriate insert to repair the
threaded hole.
Inspect the condition of the flange ring O-ring and replace the O-ring if necessary.
Mount the fixture using 3/8” x 16 Type 304 (18-8) Stainless Steel Hex Cap Screws. The bolt
must be fully threaded. Insure that the bolt’s specific chemistry and physical
characteristics and source of supply are known. Use a bolt that is marked “F593C” or a
verified equivalent. At a minimum, choose a bolt length that insures a ½” (13 mm) thread
engagement in the base can top flange. Further, the bolt length should be chosen to insure
at least 1/8” (3.2 mm) to
½”
(13 mm) extends below the base can top flange. However,
note that installing bolts that are excessively long can increase the risk that the bolt will
break off in the flange during removal, after the bolt has been installed a long period of
time. Always use a new bolt. Never reuse existing bolts.
WARNING
Read installation instructions in their entirety before starting installation.
Make sure power is off before you install or remove any fixture.
Failure to follow these warnings may result in serious injury or
equipment damage.
CAUTION
Make sure that:
— The fixture is supplied with 6.6A maximum from the isolation
transformer secondary via a series circuit.
— The series circuit is powered by a Constant Current Regulator that
complies with FAA AC 150/5345-10 or IEC 61822.
— Depending on installation location, the isolation transformer is a series
transformer that complies with FAA AC 150/5345-47, IEC 61823, or
CSA C22.2 No. 180.
— The base can is correctly earth grounded. Failure to do so will void the
warranty for any damage that occurs as a result of voltage surges.
— Never hold the fixture by the cable leads. This can damage the
insulation, break the waterproof seal and cause insulation faults and
water leakage.
