SAMPLE SPECIFICATION
Items highlighted in yellow italic are to be finalized by the airport.
ITEM L-150 INSTALLATION OF MALSR SEQUENCED FLASHERS
DESCRIPTION
150-1.1 This item shall consist of furnishing and installing both the steady burning and
sequenced flashing portion of an MALSR system in accordance with these specifications.
This item shall also include all wire and cable connections, the furnishing and installing
of all necessary conduits and fittings and all necessary mounting structures. It shall also
include the testing of the installation and all incidentals necessary to place the flashing
lights in operation as completed units to the satisfaction of the Engineer.
EQUIPMENT AND MATERIALS
150-2.1 MALSR. The MALSR system shall conform to the requirements of FAA
specification FAA-E-2325, “Sequenced Flashing Lighting System.” For compatibility of
spare parts, equipment supplied shall also meet FAA-E-2628 (ALSF sequenced flashing
system), with no modification to the Individual Control Cabinets (ICCs) or Flash Heads.
The MALSR system shall be as manufactured by ADB Airfield Solutions (www.adbair.com) or approved equal.
150-2.2 EQUIPMENT SUPPLIED. The system shall consist of {3/5/8} Elevated
Sequenced Flashing Lights, {3/5/8} Individual Control Cabinets (ICC), High Voltage
Interconnection Wire, {3/5/8} Junction Boxes, 1 Master Control Cabinet {with / without
lamps-out monitoring}, 1 15KVA Transformer, {45} PAR 38 Lampholders, {45} PAR 38
lamps, {TBD} PAR 56 Lampholders, {TBD} PAR 56 Lamps, 1 Aiming Device, 1 Flasher
Tester, 1 Spare Parts Trunk and 1 Instruction Manual.
150-2.3 MASTER. Input power shall be 120/240VAC, 60Hz. The Master shall be able
to accept either 120Vac or +48Vdc remote control signals. All Control and Monitoring
shall be solid state and contained on 3 PCBs located in the Master Control Cabinet. One
PCB shall be for I/O; one for the overall digital system logic and one for monitoring. It
shall be possible to delete the monitoring PCB with no effect on system control. Control
signals shall be 120Vac, generated using a zero-crossing triac to insure low RF noise is
generated. Trigger signals shall be via a positive half-wave rectified 120Vac signal using
a similar triac circuit.
150-2.4 ICC. The ICC shall develop a regulated +2000Vdc to power a PAR 56 xenon
flash lamp.
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The ICC shall transmit a robust monitoring feedback signal to insure signal integrity over
long distances. The monitoring feedback signal shall be via a positive half-wave rectified
120Vac signal, timed to coincide with a predefined monitoring window.
150-2.5 FLASHER TESTER. The Flasher Tester shall check the following parameters:
1. Input power to Flasher Tester.
2. On/Off relay in ICC.
3. Input power to ICC.
4. Input power to HV DC power supply in ICC.
5. Medium intensity command to ICC.
6. High intensity command to ICC.
7. Trigger signal to Flash Head.
It shall be possible to individually connect the Flasher Tester to a single ICC/Flash Head
in order to perform troubleshooting in the maintenance shop. The Flasher Tester shall
have a trigger output to allow the lamp to be manually flashed.
150-2.6 INTERCONNECTION WIRING. Remote control shall be by 6/C, AWG 12
wire connected only to the Master. Power to the ICCs shall be by 3/C, AWG 10 wire
daisy-chained between the Master and each ICC. Intensity control shall be by 2/C, AWG
16 wire daisy-chained between the Master and each ICC. {Monitoring (if used) shall be
by 2/C, AWG 16 wire daisy-chained between the Master and each ICC.} The trigger
signal shall be individually connected between the Master and each ICC and shall be
AWG 16 ( {3/5/8} total wires).
Wiring connections between the ICC and the Flash Head shall use 5 wires, each rated
12AWG, 3KV (in order to meet NEC requirements for multiple wires run in the same
conduit). The MALSR manufacturer shall provide sufficient wire, in 500-foot spools, to
make all interconnections between {3/5/8} Flash Heads and {3/5/8} ICCs.
150-2.7 15KVA TRANSFORMER. The 15kVA, 60Hz power transformer shall power
the steady burning PAR-56 or PAR-38 lights. Taps on the primary of the transformer
shall be switched by contactors in the master control cabinet to provide power at any one
of three voltage levels to the steady-burning lights. With a 240Vac input, the transformer
shall provide 50/100V AC ±0.5% for Low intensity, 75/150V AC ±0.5%, for Medium
intensity and 120/240V AC ±0.5% for High intensity. Taps shall also be provided on the
primary of the transformer to permit secondary voltage adjustment to within 2.5% of the
required secondary output assuming the primary voltage is between 210V and 252V AC.
The 15KVA transformer shall be painted aviation orange. The 15KVA transformer shall
be housed in an outdoor, rain-tight enclosure and shall have lugs on the back of the
enclosure to permit the cabinet to be mounted in a vertical position. The maximum
dimensions of the transformer shall be 13.25”W x 12”H x 18”D (33.7 x 30.48 x 45.7 cm).
150-2.8 PAR 38 LAMPHOLDERS. There are typically 45 PAR-38 lamp holders
mounted five to a light bar in the runway approach. Each lamp holder shall be designed
to accommodate 120W, 120V AC PAR-38 lamps. An adjustable base on the lamp holder
shall permit vertical adjustment from the horizontal to 25° above the horizontal. Also,
the mounting hardware shall permit horizontal alignment of the light beam axis to any
horizontal angle within +1°. The lamp holder shall have a mounting base that can mount
on the open top of a frangible coupling, on a light bar with an adapter sleeve, or to a 2inch (EMT) conduit.
150-2.9 PAR 38 LAMPS. The MALSR approach lamps shall be PAR 38, 120W, 120V
AC. 18 degree spot, Watt-Miser type.
150-2.10 PAR 56 LAMPHOLDERS. Eighteen PAR-56 lamp holders are typically
installed on the runway threshold. The lamp holder shall have mounting clips to hold a
green filter and be designed to accommodate a 300W, 120V AC PAR-56 lamp. Each
lamp holder shall have an adjustable base for vertical adjustment. The lamp holder shall
have a mounting base that can to a 2-inch EMT conduit or on top of a frangible coupling.
150-2.11 PAR 56 LAMPS. The MALSR threshold lamps shall be the PAR 56, 300W,
120V AC.
CONSTRUCTION METHODS
150-3.1 PLACING THE MALSR LIGHTS. The contractor shall furnish and install a
{3/5/8} light MALSR sequenced flasher system and steady burning lights as specified in
the proposal and shown in the plans. The MALSR shall be mounted on poles or towers at
the location shown on the plans.
150-3.2 TESTS. The system shall be fully tested by continuous operation for not less
than 24 hours as a completed system prior to acceptance. The test shall include the
functioning of each control (Low, Medium and High) in both Remote and Local not less
than 10 times at the beginning and end of the 24-hour test. . {Monitoring Tests- The
lamps-out thumbwheel shall be set to 10. No cautions or faults shall be generated at the
end of the 24-hour test.}
METHOD OF MEASUREMENT
150-4.1 MEASUREMENT. The quantity of lights to be paid for under this item shall be
{3/5/8} Elevated Sequenced Flashing Lights, {3/5/8} Individual Control Cabinets (ICC),
High Voltage Interconnection Wire, {3/5/8} Junction Boxes, 1 Master Control Cabinet, 1
15KVA Transformer, {45} PAR 38 Lampholders, {45} PAR 38 lamps, {TBD} PAR 56
Lampholders, {TBD} PAR 56 Lamps, 1 Aiming Device, 1 Flasher Tester, 1 Spare Parts
Trunk and 1 Instruction Manual installed and accepted as completed units, in place, ready
for operation.
BASIS FOR PAYMENT
150-5.1 PAYMENT. Payment will be made at the contract unit price for the completed
MALSR system installed, in place by the Contractor, and accepted by the Engineer. This
price shall be full compensation for furnishing all materials and for all preparation,
assembly, and installation of these materials, and for all labor, equipment, tools, and
incidentals necessary to complete this item.
Payment will be made under:
Item L-150-5.1
MALSR system, in Place—per each
END OF ITEM L-150