Document UT-MT-0573
Page 25 of 28
Edition 03/13/2012
Supersedes edition 02/09/2010
SLTH – SEMI-FLUSH THRESHOLD LIGHT
INSTRUCTION MANUAL FOR USE, INSTALLATION AND MAINTENANCE
5.7.3. Pressure test
The assembly should be given a 1.38 kPa air pressure test.
See par 4.3.3.
5.8.
VIBRATION-DAMPING BLOCK
Remove the fixture from the base and open the fixture, as described at paragraph 4.1
It is recommended to replace all the four vibration-damping blocks.
Remove the lamp supporting plate (fig.1 – n°11) com plete with lamps, by unscrewing the
four screws HSCH M5x25 (fig.1 - n°16).
Remove the brass spacers and then the vibration-damping blocks.
Mount the new vibration-damping blocks in their seats and insert the new brass spacers.
Reassembly the lamp supporting plate, by tightening the four screws HSCH M5x25 (fig.1 -
n°16); tightening torque is 2.5 Nm.
Reassembly the fixture following instructions of par 4.2.
5.9.
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 (fig.5/6 – n°7)
and the lower cover, check the tightening of the valve body to the lower cover from the
inside of the fixture.
In case the pressure valve needs replacing, operate as follows, considering the fixture
already open, as described at paragraph 4.1. Remove the valve cap. Unscrew the valve
body with gasket from the inside of the lower cover 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 is tightened to the valve body and then screw its cap.
Reassembly the fixture following instructions of par 4.2.
5.10.
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.
NOTE: see par 5.0 for recommended spare parts list
