6.3 How to replace the lamp
6.3.1 Procedure
Lamp replacement can be performed preferably in the maintenance base, or on site, at the location of installation. The
following table instructs you on how to replace a lamp in the maintenance base:
1. Open the fitting by hinging down the optical cartridge (1).
2. (UEL-1-150): Slide the insulating sleeves away from the "fast-on" connectors and disconnect the lamp (2) from the cable
wires.
(UEL-1-120): Disconnect the cable from the lamp (2).
3. Remove the optical cartridge and replace it by another one of the same model, in overhauled condition. If damaged,
replace the insulation sleeves.
4. (UEL-1-150): Reconnect the lamp. Apply a light coat of silicone grease on the fast-on connectors. Slide the insulating
sleeves back in place over the fast - on connectors
(UEL-1-150): Re-connect the lamp cable
5. Close the optical cartridge.
6. Back in the maintenance base:
a) Remove the lamp (on the UEL-1-120, by unscrewing the four fixation screws)
b) Clean the cartridge and especially the front glass (1b), check the condition of the reflector (1c), the gaskets (1a and 1d)
and the spring (7), and replace if needed.
c) Carefully install the new lamp in the keyed aperture at the rear of the optical cartridge (on the UEL-1-120, retighten
the four screws).
The optical cartridge is now ready to be used again.
CAUTION
1. In case of relamping executed in the field, the lamp can be changed without removing the optical cartridge
from the light. The quality of the result can be affected, most of all in case of night work, rain or cold
conditions.
2. Touching the quartz bulb with bare fingers may seriously shorten the lamp’s life. If the bulb has been
touched, wipe it carefully with a piece of lens cleaning tissue or similar material moistened with alcohol.
6.3.2 Illustration
The illustration below clarifies the procedure described above.
High Intensity Unidirectional Elevated Light for Approach, Threshold and Runway End and for Sequenced Flashing Lights (SFLS)
Maintenance
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