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5. Installation
a) Fitting the lamp
To insert the MSD250/2 lamp loosen the lamp cover at the rear of head by removing the 3 fastening screws which
are marked "X, Y, Z". Carefully pull out the cover with the lamp socket assembly. If changing the lamp, remove the
old lamp from the socket and insert a new lamp into the socket.
Do not install a lamp with a higher wattage! A lamp like this generates temperatures the device is not designed for.
Please follow the lamp manufactures notes! Do not touch the glass bulb with bare hands during the installation! Make
sure that the lamp is installed tightly into the lamp holder system.
Close the lamp cover and tighten the 3 screws.
b) Lamp adjustment
The SNARK 250 lamp holder is aligned at the factory. Due to differences between lamps, fine adjustment may
improve light performance. Strike the lamp, open the shutter and the iris. Set the dimmer intensity to 100% and focus
the light on a flat surface. Centre a hot spot (the brightest part of the image) by using the 3 adjustment screws "A, B,
C". Turn one screw after another a quarter-turn clockwise or counter-clockwise .If you cannot detect the hot spot
adjust the lamp until the light is evenly distributed.
c) Adjusting beam angle
The lens system can be configured in the range between 8° and 22°.
To set the desired beam angle, loose the 2 adjusting screws on the lens unit and adjust the required beam angle.
Tighten the adjusting screws again and fix back the front cover.
d) Mounting the device
• Have the device installed by a qualified person, respecting EN 60598-2-17 and all other applicable norms.
• The carrying construction must be able to support 10 times the weight of the device for 1 hour without deforming.
• The installation must always be secured with a secondary attachment e.g. a safety cable.
• Never stand directly below the device when it is being mounted, removed or serviced. Have a qualified technician
check the device once a year and once before you bring it into service.
• Install the device in a location with few passers-by that is inaccessible to unauthorised persons.
• Overhead mounting requires extensive experience: calculating workload limits, determining the installation
material to be used... Have the material and the device itself checked regularly. Do not attempt to install the
device yourself if you lack these qualifications as improper installation may result in injuries.
• Adjust the desired inclination angle via the mounting bracket and tighten the bracket screws.
• Make sure there is no flammable material within a 0.5m radius of the device.
• Have a qualified electrician carry out the electric connection.
• Connect the device to the mains with the power plug. Do not connect it to a dimming pack.
• The installation has to be approved by an expert before the device is taken into service.
e) Replacing the fuse
• If the lamp burns out, the fuse of the device might fuse, too.
• Only replace the fuse by a fuse of the same type and rating.
• Before replacing the fuse, unplug mains lead.
1) Unscrew the fuse holder on the rear panel of the base with an appropriate screwdriver.
2) Remove the old fuse and install the new fuse in the fuse holder.
3) Replace the fuse holder in the housing and tighten it.
VDP250MHW16
3
VELLEMAN
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