Document UT-MT-0779_EN
Page 34 of 37
Edition 23/04/2019
Supersedes edition 06/03/2019
LED INSET RUNWAY EDGE LIGHT LIRE
INSTRUCTION MANUAL FOR USE, INSTALLATION AND MAINTENANCE
Close the light fixture following instructions of paragraph “Closing the Fixture”,
“Leakage Test” and “Reinstalling the fixture”.
4.10
PRESSURE VALVE
If a leakage is found through the pressure valve during an air pressure test, check
carefully where the leakage happens. If the leakage is between the valve (Figure 26 -
n°2) and the lower cover, check the tightening of the valve body to the lower cover
from the outside of the fixture.
In case the pressure valve needs replacing operate as follows, considering the fixture
already opened following instructions of “Removing and Opening the Light Unit From
the Base”. Unscrew the valve body with gasket from the outside of the lower cover
(Figure 26 - n°1) by clamping the hexagonal end section of the valve body. Screw the
new valve on the lower cover; tightening torque is 0.35 Nm. Check the valve core
(Figure 26 - °3) is tightened to the valve body (Figure 26 - n°2) and then screw its cap
(Figure 26 - n°1).
Reassembly the light unit following instructions of paragraph “Closing the Fixture”,
“Leakage Test” and “Reinstalling the fixture”.
Figure 26 - Lower Cover with Pressure Valve
4.11
CLEANING
Service life depends upon the entire assembly being waterproof. All surfaces must be
clean, dry and free of all foreign matter if the light fixture is to operate for an
extended period without requiring maintenance.
4.12
MONITORING
The fixtures can be provided with the option of monitoring. This device allows to
show at the constant current regulator as if the fixture circuit was open when a LED
burns out. The fixture thus acts as a traditional lamp fixture.
When the fixture has a bad operation, the internal monitoring device disconnects
definitively the fixture from the series circuit; after this operation to restore the
