Document UT-MT-0708_EN
Page 13 of 17
Edition 11/03/2014
Supersedes edition 11/14/2013
LED ELEVATED HELIPORT LIGHT LHE
INSTRUCTION MANUAL FOR USE, INSTALLATION AND MAINTENANCE
4.1.1
Periodical Checks
Daily
Burnt-out luminous source
Broken parts of lights
Monthly
Cleaning of the lenses
Correct setting of the lights
Semi-Annual
Painting or replacement of rusted parts
Annual
Stability of the civil works
Stability and assembly of lights
Electrical connections and insulation degree
Luminous efficiency of luminous sources
Condition of all the gaskets
Unscheduled
After unusual atmospheric precipitation, check the
light condition and remove any luminous beam
obstructions
4.1.2
Snowplow Operations
Snowplow operators should exercise extra care not to strike the light fixtures with
snowplow blades. After snow removal operations, inspect all light fixtures to locate
and replace, if necessary, any damaged light assemblies.
4.2
REMOVING AND OPENING THE LIGHT UNIT
4.2.1
Removing the fixture
Remove the fixture from base plate or pipe elbow following steps are suggested:
unscrew the frangible coupling screw
hold the fixture and unscrew the frangible coupling
lay the fixture and disconnect plug to the secondary receptacle inside the pipe elbow
disconnect the fixture grounding wire to the grounding wire coming from the pit (or from
the base).
4.3
LENS CLEANING
4.3.1
Prism outside cleaning
Removing the fixture is not necessary to clean the outer surface of the prisms, and if
already removed is not necessary to open it. Clean the lens surface with non abrasive
glass product.
