Exhaust Ducting - Christie CP2000-SB User Manual

2.1.3 Exhaust Ducting

Warm exhaust air from the CP2000-SB must vent to outside of the building.
Connect pre-installed outside-venting ductwork via 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 CP2000-
SB are clear and exposed, and 3) the vane switch at the exit duct is moving freely.
The pre-installed outside-venting duct should be rigid for a 10" length at the
projector and must also include a heat extractor/blower that maintains at least 450
to 600 CFM when measured at the projector exhaust opening, depending on the
lamp. See Table 2.1.
Table 2.1 Airflow Requirements
Lamp (kW)
2 or 3
4.5 or 6
CALCULATE CFM in 8" DUCT:
Use an air flow meter to measure the ft/min or ft/sec at the rigid end of the duct that will connect to the
projector (measure right at the end). Then multiply the reading by the cross-sectional area of the 8" duct to
calculate the cubic feet/min airflow. The formula is: Measured linear ft/min x 0.34 = CFM
Depending on the lamp, calculations should show 450 or 600 CFM airflow (see Table 2.1) in the 8" exhaust
duct. Add extractors/boosters as needed for your site, as the vane switch (see right) will prevent the projector
from operating if the airflow is inadequate. Do not mount extractor on the projector. 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
Cooling. Warning! Never disable a vane switch. Attempting to operate the projector with inadequate airflow
can result in dangerous overheating of the projector.
CP2000-SB User Manual
020-100162-06 Rev. 1 (03-2014)
Minimum Exhaust Airflow
Rate
3
450 ft /min.
3
600 ft /min.
Figure 2-18 Vane Switch
Section 1: Introduction
Figure 2-17 Attach
Exhaust Ducting
Section 6.2 Maintaining Proper
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