Christie CP2220, Руководство по установке

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2-8 CP2220 Setup Guide
020-100476-05 Rev. 1 (05-2014)
2.8 Connect External Exhaust Ducting
Connect the existing outside-venting ductwork to the 8 inch diameter
exhaust port on the top of the cinema projector. Confirm that there are
no obstructions or bends in the ducting, all air intakes are free of
obstructions, and the vane switch at the exit duct moves freely.
The pre-installed outside-venting duct should be rigid at the cinema
projector and must also include a heat extractor and blower that
maintains a minimum of 450 CFM* when the cinema projector is
operating at less than or equal to 25°C ambient and less than 3,000
feet, while measured at the cinema projector exhaust opening.
• *600 CFM is required in projection rooms with an ambient
temperature above 25°C or located at an elevation
greater than 3000 feet above sea level.
• At minimum, a 10” long, strong metal duct must be
installed at the cinema projector to prevent glass shards
from exiting the duct in the event of a lamp explosion.
2.8.1 Determine the cinema projector Exhaust CFM Value
Use an airflow meter to measure the ft/min or ft/sec at the rigid end of the open exhaust duct that connects to
the cinema projector. Take the measurement at the very end of the duct without the cinema projector
connected. Use this formula to determine the CFM value for the cinema projector:
Measured linear ft/min x 0.35 = CFM
Table 2.1 Installation Requirement Calculations
Add an extractor or a booster if there is insufficient airflow.
Do not mount the extractor on the cinema projector as this
may introduce some vibration into the image.
NOTE:
To
prevent the cinema projector from overheating or becoming
unsafe, an alarm sounds if the duct is obstructed or a fan fails.
It is recommended that you regularly verify that the exhaust is
functioning correctly.
Never disable the vane switch.
Attempting to operate the cinema projector with
inadequate airflow can result in dangerous overheating of the cinema projector.
Airflow
(CFM)
Temperature
Altitude (above sea
level)
450 CFM
25°C or lower at or below 3000 feet
600 CFM
greater than
25°C
and below 35°C
at or below 10 000
feet
Exhaust
Duct to
Outside
450 cfm
required*
Figure 2-6 Connect Exhaust
Ducting
WARNING
Top View into
Exhaust Duct
Vane Switch
Figure 2-7 Exhaust Duct Vane Switch