radiance 7201111, Instruction Manual

Page: 11 / 26

RAD/09
MAINTENANCE
REMOVABLE COVERS, secured with quarter-turn fasteners, are located above the
lamphouse and optical system. To clean the lenses, remove the two front optical system top covers.
The center lens, the back surface of the large lens, and the heat filter glass can be cleaned easily through
this opening. Using a good grade of alcohol and piece of lens tissue (facial tissue can be used as a
substitute), gently wipe both sides of each lens until the surfaces are clean. To clean the front surface
of the large lens, slide the lens carriage to the full forward position. The front surface is then readily
accessible through the front of the housing.
THE REFLECTOR should be cleaned periodically with a clean, soft lint-free cloth to
remove any dust from the reflecting surface. USE NO ABRASIVES. Clean the envelope of the lamp
in the same manner before replacing the lamphouse cover.
THE INSIDE of the lamphouse, lens mechanism and the fan should be cleaned
periodically, depending on the dust conditions at each installation. The fan impeller blades and inlet
grilles need cleaning to remove the dust buildup that accumulates over a period of time.
THE FRAMING SHUTTER DRIVE DISCS (see Figure 3, Items 12 & 13) and the roller
bearings (Item 11) are lubricated with white lithium-base grease. If replacing the grease, use a similar
type (typical drop point 380° F/190° C). Do not overlubricate since excessive grease will attract dust
and other contaminants.