Christie CP2000-ZX User Manual page 19

STEP 5 - Connect Exhaust Ducting
The projector emits a constant stream of warm exhaust air, which must
be vented to the outside of the building. Connect the pre-installed,
outside-venting ductwork via the 8" inside diameter fireproof ducting
material attached to the projector's top exit port. Confirm that 1) there
are no obstructions or 'kinks" within the ducting, 2) all air intake areas
of the projector are clear and exposed, 3) the vane switch at the exit duct
is moving freely. The pre-installed outside-venting duct should be rigid
at the projector and must also include a heat extractor/blower that
maintains at least 450 CFM* when measured at the projector exhaust
opening.
ambient temperature above 25
level) greater than 3000 feet.
must be in place at the projector to prevent glass shards
from exiting the duct in the event of a lamp explosion.
Calculating CFM in the 8" duct: Use an airflow meter to measure the ft/min or ft/sec at the rigid end of the
open duct that will connect to the projector. Make sure the measurement is taken right at the very end, without
the projector connected. Then multiply the reading by the cross-sectional area of the 8" duct to calculate the
cubic feet/min airflow. The formula is:
Calculations should show 450 CFM airflow in the 8" exhaust
duct if operation is at 25°C or lower and installation is at or below
3000 feet altitude (above sea level). Add an extractor/boosters as
needed for your site, as the vane switch will prevent the projector
from operating if there is insufficient airflow. Do not mount the
extractor on the projector as this may introduce some vibration
into the image. NOTE: If the duct becomes significantly blocked
- or if a fan fails - the projector should trigger an alarm before
becoming overheated or unsafe. Regardless, check airflow
regularly. Caution! Never disable the vane switch. Attempting to
operate the projector with inadequate airflow can result in
dangerous overheating of the projector.
CP2000-ZX User Manual
020-100006-05 Rev. 1 (05-2009)
* 600 CFM is required in projection rooms with
C or elevation (above sea
°
At minimum, a 10" long, strong metal duct
Measured linear ft/min x 0.34 = CFM
Section 2: Installation & Setup
Figure 2-5 Connect Exhaust
Ducting
Figure 2-6 Exhaust Duct Vane Switch
2-5