4. INSTALLATION INSTRUCTIONS
Before connecting the luminaire to the electrical mains ensure that:
A - Earth line is present on the power socket.
B - The mains voltage is within the rated range of the luminaire (see technical data on the
rating label)
C - The lamps fitted:
!are among the recommended lamps (see De Sisti Lighting catalogue or contact
your De Sisti dealer)
!have the same nominal voltage as the mains supply
!have a nominal power not higher than 1 fourth of the maximum power of the
luminaire
NB: the luminaire nominal frequency rate is 0 - 60 Hz.
D - The front safety shields against the lamp explosion are present and in good condition.
Depending on luminaire type these items may consist of:
!wire mesh guard 3 mm x 3 mm
!safety or dichroic glass plus wire guard 12 mm x 12 mm
!Fresnel lens plus wire guard 25 mm x 25 mm.
Shields, lenses safety or dichroic glasses shall be changed if they have become visibly
damaged to such an extent that their effectiveness is impaired, for example by cracks or deep
scratches.
5. LAMP INSTALLATION AND REPLACEMENT
The following procedure should be adopted:
A - Ensure the luminaire is electrically isolated from the power supply.
B - WAIT LEAST 5 MINUTES FROM SWITCHING OFF to avoid risk of injury from possible
lamp explosion. Then open the front hinged door holding the lamp assembly.
WARNING: AFTER THE ABOVE MENTIONED TIME THE LAMPS MAY STILL BE VERY HOT,
USE PROPER THERMAL PROTECTION (EG. GLOVES).
C - Check that the new lamps are of the correct type.
D - Replace the lamps taking good note of the following:
do not touch the bulb with bare-hands; oil and grease can contaminate the bulb surface
and then reduce the performance and the lamp life. The plastic cover which protects the
lamp should not be removed until after fitting should the bulb become dirty due to hand
contact or for any other reason, it can be cleaned with a cloth moistened with alcohol.
E - Ensure that any safety device that has been removed is refitted correctly or that the lens
door is securely closed.
