Document 9913
Rev. V
Instruction Manual
Style 3
Runway Centerline Light L-850A & Touchdown Zone Light L-850B
4
CAUTION:
CAUTION
Never handle the light assembly by the leads as this can break the waterproof seal.
8
Installation
8.1
Installation
The Style 3 RCL and TDZ light units are shipped complete, including the lamp(s), and are ready for installation
as received. Installation of the light unit is to be done with primary
POWER OFF
and
SECURED.
At
each 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. Place
the properly sized isolation transformer(s) in the light base and make necessary primary power connections
using L-823 connectors. The RCL light unit requires either two 45 watt, 6.6A secondary transformers for the
two lead version, or one 100 watt, 6.6A secondary transformer for the single lead version. The TDZ light unit
requires one 45 watt, 6.6A secondary transformer. Verify that the mounting flange on the light base is clean and
the 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 Figure
2). The threaded eyebolts on the lifting tool screw into threaded holes in the light fixture. Lower the light unit
straight down onto the base. The light fixture is subject to optical misalignment or mechanical damage if not
seated properly. Verify the light beam(s)/color(s) are properly orientated for the individual location. Secure the
light fixture to the base per section 8.2
8.2
Installation Bolt Torque
•
Use fully threaded, 3/8-16 bolts meeting requirements of FAA EB83A. (P/N 21716 is
recommended.)
•
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 be
recalculated 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
”
