Step 5 - Connect Exhaust Ducting - Christie CP2000-ZX Setup Manual

Section 2: Installation & Setup

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 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. Caution!*600 CFM is
required in projection rooms with ambient temperature above 25°C or
elevation (above sea level) greater than 3000 feet. Warning! At minimum,
a 10" strong metal duct 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 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 as described in
Never disable the vane switch. Attempting to operate the
projector with inadequate airflow can result in dangerous
overheating of the projector.
2-4
Measured linear ft/min x 0.34 = CFM
Section 4 Maintenance. Caution!
Figure 2-5 Connect Exhaust
Ducting
Figure 2-6 Exhaust Duct Vane Switch
CP2000-ZX Setup Guide
020-100098-04 Rev. 1 (06-2009)