Siemens L-852A-D manual Wireways Preparation, Installation on L-868B Base

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

Pavement Recess and Wireways Preparation (contd.)

∙Make sure the recess size and depth are maintained within specified limits.

∙The recess side walls must be perpendicular to the pavement surface.

∙The bottom surface must be flat or slightly concave to ensure that the base receptacle is resting securely and in true position.

∙The recess can best be drilled using a 13-in.- (330-mm-) diameter diamond-faced core drill in a sturdy, stable drill rig.

Wireways Preparation

To prepare wireways, follow the guidelines below.

∙See Figure 3. The wireways should be sawed using a 3/8-in.- (9.525-mm-) thick diamond-faced saw.

∙When the wireways cross construction joints, the sawcuts should extend 1-1/4-in. (31.75 mm) below the existing joint for a distance of 6 in. (152.4 mm) on each side of the joint.

∙Fill to 1 in. (25.4 mm) from the top of the pavement with an appropriate joint sealing filler in accordance with Item P-605 or P-606 of FAA publication Standard Specifications for Construction of Airports. Item P-605 should be used with asphalt, and Item P-606 with concrete.

Installation on L-868B Base

The light assembly is shipped complete, including the lamp, and is ready for installation.

To install the L-852A-D light fixture on the L-868B base, perform the following procedure:

1.Clean the base receptacle. Make sure that the base receptacle does not contain water and is completely clean and dry. The mating surfaces must be clean and free of foreign particles.

2.Slide a 16-inch- (406-mm-) long rod through the 3/8-inch-

(9.525-mm-) diameter eyebolts and carry the light assembly to the base. Align the light assembly with the runway for proper light direction.

3.Place the light assembly beside the opening in the L-868B base so that the L-823 connector can be connected with the mating receptacle from the L-830 isolation transformer in the base. Make sure that the

© 2001 Siemens Airfield Solutions, Incorporated	96A0149E	Page 14
All rights reserved	Issued 5/01