Document UT-MT-0780_EN
Page 9 of 39
Edition 03/10/2015
Supersedes edition 03/11/2014
LED INSET THRESHOLD AND THRESHOLD WING BAR LIGHT
LRTH04
INSTRUCTION MANUAL FOR USE, INSTALLATION AND MAINTENANCE
A silicone O-Ring (separately supplied) has to be mounted outside around the dome,
to avoid dirt deposits between dome and shallow base.
1. Dome
2. Slot for dome removal
3. Letter “A” to identify the
beam
4. Through hole for light unit
fastening
Figure 1 – 12” Dome outside view
2.1.2
Optical Assembly
The
optical assembly
consists of two prisms (Figure 5 - n°13) with relevant gaskets
(Figure 5 - n°12) kept into the proper position by mounting plate (Figure 5 - n°15) and
two LED module (Figure 5 - n°7) with reflector (threshold) or lens array (threshold
wing bar) (Figure 5 - n°6).
Three optical assemblies, with toe-in, are available for this fixture:
Straight “S”
Left “R”
Right “L”
LED module consists of six LEDs mounted on a metal core PCB, coupled with the
support through thermo conductive material; the reflector is fixed to the support
assembly.
All the optical assembly parts are factory assembled; they may be field-replaced if
necessary.
2.1.3
Power Supply/Control Board
The power supply/control board is encapsulated into waterproof and heat
conductive silicon resin.
The PCB powers and controls the LEDs so that the light output provided at every
current step from 2.8 A to 6.6 A is comparable to a traditional halogen lamp,
according to the requirements of FAA “Engineering Brief N°67” document.
