Type L-852A-D Dualite Bidirectional Taxiway Light Fixtures

Repair

Replacing Lamp (contd.)

6. Replace the film disc cutout (2) (if used) from the inner cover

 

 

assembly. To remove the cutout, perform the following procedure:

 

a) Loosen the screw that secures the wire lead to the feed-thru, and

 

rotate the cutout clip (1) free from the top of the cutout.

 

 

b) Position the new disc cutout (small button side down) on the head

 

of the screw in the terminal post. Rotate the cutout clip on top of

 

the disc, and hold in place while tightening the screw.

 

 

NOTE: Make sure the cutout clip has sufficient tension to hold

 

the cutout disc tightly against the screw head. If the cutout is

 

loose, remove the clip and bend slightly to increase tension.

 

7. Examine the O-ring (8) carefully. If the O-ring is stretched or torn,

 

has a permanent set or other defect that would prevent it from forming

 

a watertight seal, replace the seal. Coat the O-ring with silicone

 

grease before installing. Carefully position the O-ring in the groove

 

on the outer cover assembly and gently press into place.

 

 

NOTE: The groove is made wider than the O-ring to provide room

 

for displacement of the O-ring when compressed between the housing

 

when the screws on the inner cover assembly are properly torqued to

 

24 ±5 inch-pounds (2.712 ±0.565 Nt-M).

 

 

NOTE: If the o-ring is too large, replace o-ring.

 

 

8. Reinstall the eight pan-head screws that secure the inner cover

 

assembly to the outer cover assembly. Torque screws across corners to

 

24 ±5 inch-pounds (2.712 ±0.565 Nt-M).

 

 

9. Reinstall the light fixture in the base receptacle using the six 3/8-inch-

 

(9.525-mm-) diameter bolts. Coat bolt threads with a drop of Loctite

 

Grade AV before installation and torque to 185 ± 5 inch-pounds

 

(20.902 ±0.565 Nt-M). Torque across corners. Refer to Retorquing

 

Mounting Bolts in the Maintenance section.

 

 

NOTE: Applying more than one drop of Loctite to the screw and bolt

 

threads will create future difficulty in removal of the bolts.

 

 

NOTE: After several relampings, threaded holes may accumulate

 

with dirt and excessive Loctite. If this occurs, screws may not seat

 

properly. Clean holes with light-weight oil or diesel fuel using a small

 

fiber brush. Wipe clean with alcohol to remove all oil or diesel fuel

 

and dirt. Clean with dry, oil-free, low-pressure air.

 

 

Replacing Prism

 

 

Replace the prism if it is broken or its surface is badly pitted or scarred. If

 

you replace the prism, return the unit to Siemens Airfield Solutions for

 

repair. Any attempt to replace the prism in the field prior to warranty

 

expiration will terminate the warranty on the unit.

 

 

 

 

© 2001 Siemens Airfield Solutions, Incorporated

96A0149E

Page 28

All rights reserved

Issued 5/01

 

Page 33 Page 35
Page 34
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Siemens L-852A-D manual Replacing Lamp contd
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L-852A-D specifications

The Siemens L-852A-D is an advanced lighting system designed primarily for airport applications, providing a robust solution for runway edge lighting. This innovative product is engineered to enhance safety and operational efficiency in various weather conditions, catering to the unique demands of modern air traffic management.

One of the most notable features of the L-852A-D is its LED technology. The use of light-emitting diodes significantly increases energy efficiency compared to traditional incandescent lights. LEDs are known for their long lifespan, often exceeding 50,000 hours, which translates to reduced maintenance costs and less frequent replacements. This is particularly beneficial in airport environments where minimizing downtime is crucial.

The L-852A-D is designed to provide exceptional visibility with its high-intensity output, crucial for both day and night operations. The system's optical design ensures uniform light distribution, which enhances pilot awareness and improves navigation during takeoff and landing. Additionally, the device is engineered to comply with international aviation standards, ensuring reliability and safety in all conditions.

Another key characteristic of the L-852A-D is its durability. The system is constructed to withstand harsh environmental conditions, including extreme temperatures, high winds, and moisture. Its housing is built from corrosion-resistant materials, ensuring longevity even in challenging climates. The product is also designed to be highly resilient to impacts, which is essential in high-traffic airport settings.

The L-852A-D incorporates sophisticated control technologies that enable adaptive lighting capabilities. This feature allows for automatic adjustments based on external conditions, such as visibility levels, significantly enhancing operational efficiency. Furthermore, it can be integrated with central control systems, allowing for seamless management and monitoring from a single point.

Safety is paramount in airport operations, and the L-852A-D includes features that enhance user and operational safety. Its low profile reduces the risk of physical hazards, while the integrated fail-safe mechanisms ensure continued operation in the event of a power failure.

In summary, the Siemens L-852A-D runway edge lighting system combines advanced LED technology, durability, and intelligent control features to provide an efficient and reliable solution for airport environments. Its main attributes include energy efficiency, long lifespan, compliance with regulatory standards, and robust construction, making it an ideal choice for enhancing safety and operational efficiency in aviation lighting.
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