Martin MAC 250 Wash, User Manual

Page: 21 / 44

Optics 21
Installing the wide-angle lens
A 61.5° cutoff-angle wide-angle lens is supplied with the MAC 250 Wash, together with all items necessary
to install it.
To install the wide-angle lens:
1. Disconnect the fixture from power and allow
it to cool.
2. Set the tilt lock and remove top and bottom
head covers.
3. See Figure 9. Prepare to hold the front lens
assembly as it is released, then remove the
four retaining screws and remove the
assembly.
4. See Figure 10. Place the front lens
assembly face down on a work surface.
Remove the 4 screws from the lens clamps,
then remove the clamps (A), the standard
lens (B) and the 4 silicone tubes (C) from the
lensholder ring (D).
5. Reassemble using the same screws but
replacing the standard clamps, silicone
tubes and lens with the extra items supplied
with the MAC 250 Wash.
Note that the smooth side of the lens must face towards the lamp, as shown in Figure 10. Make sure
that the lens is centered and sits flat on the lensholder ring (D). Tighten screws enough to compress the
silicone tubes and hold the lens firmly, as shown in Figure 11.
6. Reinstall the lens assembly in the head, reinstall the covers and release the tilt lock before applying
power.
.
Figure 9: Removing the front lens
Figure 10: Lens retaining assembly
A
B
C
D
Figure 11: Securing the lens
The textured side of the lens must face away from the
lamp.
The lens must seat squarely in the lens ring (D).
Tighten screws enough to compress the silicone tubes
and hold the lens firmly.