Overview

The L-849(L) REIL system will be mounted at the end of the runway. One OFH will be placed at each side of the runway edge. Each device (PCU and SCU) will require a dedicated emplacement that includes a concrete foundation with 2” NPT female threaded receiver.

The L-859(L) ODAL system will consist of seven (7) lights with two lights mounted at end of runway (REIL) and five lights in a straight line out from the runway centerline. The ODAL flashhead may be separated from its controller enclosure per customer requirements.

Detailed drawings, provided by others, will indicate exact placement and installation of each system.

Unpacking

Light units should be stored and transported in original ALC shipping containers. Inspect and verify the light nameplate to ensure it corresponds to the site location and input power for installation. Visually inspect the light for any damage. If any damage is noted, immediately contact ALC for possible warranty claim. Claims should also be filed with the freight/shipping company. Repackage lights into original shipping containers until installation at runway end.

Tools Required

No special tools are required for installation of the system.

The following are the recommended tools for proper installation:

• #2 Phillips screwdriver
• Flat blade screwdriver
• Micro flat blade screwdriver
• 3/16 Allen Wrench
• 3” Slip-joint pliers
• Wire Strippers
• Digital Multi-Meter (DMM)
  
  
  

Typical Layout - REIL

The Runway End Identification Lights (REIL) are used for early identification of the runway and runway end. REILs are beneficial in areas having a large concentration of lights and areas of featureless terrain. The REILs must be installed where an aircraft is in a circling approach or non-precision straight in approach. The detail below is based off FAA AC 150/5340-30 

 

Layout Notes:

1. The optimum location for each light is in line with the runway threshold lights and extended between 40 feet (12.1m) to 75 feet (22.7m) from the runway edge.
2. Location of the lights can have an upwind and downwind longitudinal tolerance of 100 feet (30.4m) and 30 feet (9.1m), respectively, from the runway threshold lights.
3. Lights should be spaced equally from the runway centerline. When adjustments are required, the difference in the distance of the units must not exceed 10 feet (3m).
4. Typical optical beam placement of the light will be 15°outward from the runway centerline and inclined at 10° above the horizontal. If adjustments are required, the light should include a baffle and be set at 10° horizontally and 20° vertically.
5. Lights should be placed at a minimum of 40 feet (12.1m) from other runways and taxiways.
6. If REILs are used with a VASI (Visual Approach Slope Indicator), install the lights 75’ (22.7m) from the runway edge. When installed with other glide slope indicators, lights will be installed 40’ (12.1m) from the runway edge. See FAA Order JO 6850.2 for additional information on jet blasts and wind vortices.
7. Both lights must be at the same elevation and within 3 feet (0.9m) of the horizontal plane through the ruway centerline.

 

 

 

Typical Layout - ODAL

The Omnidirectional Approach Lighting Systems (ODAL) are used for identification of the runway centerline and threshold. ODALs are beneficial during low visibility conditions during non-precision approaches. The system will consist of a line of five omnidirectional sequentially flashed lights and two synchronized lights at the runway threshold. The general detail below is based off FAA AC 150/5340-30 

 

The flash pattern starts at Light 1 (    ) and continues down towards the runway threshold, creating a ‘follow me’ sequence. Finally, Lights A and B will flash in sync to indicate the location of the runway threshold. The total distance of the system is 1500’ (365m) with a separation of 300’ (91m) between each light location.

 

Primary & Secondary Unit Installation

The REIL PCU and SCU are provided with either a single or double bottom fed 2” EMT compression fitting. A length of 2” EMT and a compatible compression fitting threaded at one end are required. The EMT and fittings are supplied by others based on the site requirements and conditions.  The ODAL PCU and SCU can also be provided as a wall mount. Mounting options selected by customer at time of ordering.

 

When the PCU or SCU is mounted on an in-ground base can, the EMT support is generally open to the can to allow wire passage. The units are shipped with a slotted foam plug to allow wire passage. The foam plug is essential to prevent moisture from the base can entering the units.

 

NOTE:  Failure to install the foam plug or provide other means of preventing free air passage will allow condensation to collect within the enclosure. Failure to install plug will void equipment warranty.

 

 

REIL Optical Flashhead Aiming

Using the horizontal scale located on the flashhead align with the runway centerline. The scale range is ±15° with 1° increments. A metal pointer is affixed to the flashhead hub and indicates the aiming direction. The flashhead must be properly aligned or zeroed so it is parallel to the runway.

Zero the OFH by aligning the flashhead face parallel to the runway end. This can be accomplished by installing an aiming target 200 feet down range from the emplacement. Use the edge of the flashhead as a sightline and rotate the flashhead until it aligns with the target. Tighten the three hex bolts on the EMT mounting hub to lock in the alignment.

To set the OFH offset, the optical head must be rotated to match the site requirements. Slightly loosen the two hex bolts and setscrew on the optical head hub which contains the metal pointer. Rotate the head slowly until the pointer matches the defined angle for the emplacement. Firmly tighten the two hex bolts and setscrew. Using the vertical scale on the flashhead, the unit will be adjusted to match the emplacement angle. The adjustment will be accomplished with the turnbuckle located on the backside of the flashhead. Typical alignment will have the OFH pointing upwards.

The OFH vertical scale should be zeroed. Rotate the turnbuckle until the spirit level bubble lies symmetrically between the reference lines. Slightly loosen the vertical pointer screw to allow the pointer rest on 0°. Tighten the pointer screw. Slowly adjust the turnbuckle to set the vertical angle required for the emplacement.

 

 

 

Vertical Scale - 0° to 15° 

Horizontal Scale - +15° to -15°

 

 

 

Mounting Details

The REIL Control Units can be provided with either one or two 2” bottom openings per customer selection. When ordering with two openings, 2” NPT base supports at ground level such as NPT flanges anchored in concrete at a spacing of 8” center to center, or a burial can cover with threaded entrance holes at the required spacing.

 

The unit is provided with 2” EMT compression fitting(s). Frangible fitting(s) shipped with the equipment have male threads at one end and 2” EMT compression fittings at the other. Each one is furnished with a short 2-½” length of EMT by which they may be coupled to the compression fittings on the bottom of the power supply enclosure.

 

The frangible fittings must first be screwed into the ground supports and securely tightened. The EMT couplings must be adjusted to extend out of the frangible fittings by ¾” to 1” and the compression nuts securely tightened. Set the enclosure down over the EMT coupling(s) and securely tighten the compression nut(s).

 

 

ODAL Optical Flashhead Aiming

The ODAL has three (3) adjustable set screws to allow for leveling of the OFH.  Flashhead is factory leveled, but adjustments may be required based on site conditions.

 

Use the two bubble levels located on the underside of the fixture to verify level. Loosen the three upper and lower nuts to allow the adjust of the needed screw(s). Tighten nuts to set at level.

 

 

 

Airport Lighting Company | L-849(L) REIL Runway End Identification LightL-859(L) ODAL OMNI Directional Approach Light