ADB Safegate AXON, User Manual

Page: 34 / 88

High snowplow speeds can damage the light outlets and prisms could eventually break. The allowable speed should be
determined before start of operation, based on the configuration of the equipment.
•
A speed of greater 40 km per hour is not advised.
•
Whenever snowplows must traverse over in-pavement light fixtures, they should be traveling at less than 10 km per hour
or should lift the blades clear of the fixture.
•
Some plow blades are made of a series of movable segments. These segments are spring loaded and are able to move
vertical to follow uneven pavement. Do not block blade segment mechanics which allow for such movement.
•
Adjust and regularly control plow angles as per manufacturer recommendation.
•
If frequent prism damages exist during the winter operations it may be necessary to reduce the snowplow's swivel angle
versus the driving line of the vehicle.
•
Different temperatures and snow quantities influence the parameters described. Applied settings need to follow supplier
recommendations.
Rotary brooms
Rotary runway brooms can be used for both snow and ice removal:
•
Snow - Rotary runway brooms are more effective at removing snow from in-pavement light fixtures than plow blades.
•
Ice - The type of brooms used to remove a layer of ice is important since in some cases the broom may actually "polish"
the ice, thus reducing traction.
Bristles for rotary brooms are available as steel or poly bristles.
•
Steel bristles cut the ice surface while, poly bristles flip / wipe away snow. However, using steel bristles will faster scratch
and wear out especially the glass prisms of in-pavement lights, negatively impacting the light photometry.
•
When possible avoid using steel bristles, or run rotary brooms with a mix of steel and poly bristles (e.g. 1/3) to reduce the
wear and damage to in-pavement lights.
•
Check for adequate contact pressure; evaluate during pre-winter dry-run tests.
•
Check for bristle wear according to manufacturers recommendation and replace the brooms when necessary. If worn
down the bristles will be more stiff and will increase the wear on the light fixtures and especially the prisms significantly.
•
When possible avoid using silica or glass sand. If necessary to use, remove it as soon as operational conditions allow.
When removing sand use caution with rotating brushes (rotate at low speed).
•
Use of reinforced prisms, which are about four times as hard as regular glass prisms, can significantly increase the prism
maintenance interval, though scratches will still occur over time.
Steel brushes:
•
The use of steel brushes is very effective for snow removal, it is however very important to pay special attention on how
it is being used and replace the brushes when they are worn to make sure that the brushes are not too rigid and risk
decreasing the service life of the prisms.
Tip
We recommend the use of "sapphire"
TM
prism which is about four times harder than a regular glass prism if steel
brushes are used.
The use of sapphire prisms will not make the prisms scratch proof as scratches can still occur over time but it will
increase the service interval and service life of the prism.
5.2 Recommended Maintenance Program for optimal Service Life
Service Life and Inspection intervals
All products have an expected service life. Service life is the lifetime of the product and reaching the end means that it is no
longer serviceable and should be replaced.
AXON Runway Inset Lights
Maintenance
24
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