Installing The Extractor Fan And Exhaust Duct - Runco Signature Cinema SC-1 Owner's Operating Manual

Installation
Installing the Extractor
Fan and Exhaust Duct
➤
Install an extractor fan and duct to pull warm exhaust air from the projector at a minimum
rate of 600 cubic feet per minute (CFM).
WARNING
If necessary, consult a knowledgeable HVAC technician for help with designing and
installing a cooling solution that best suits your site and installation requirements. Due to
the wide variety of available materials and installation methods, Runco can only provide
general guidelines. Review the following information carefully and adapt it as appropriate
to your specific situation:
• Direct exhaust as necessary to keep ambient air temperature between 50°F (10°C) and
95°F (35°C).
• If the projector is used for extended periods, particularly in a confined space, routing to
the outside of the building may be required. In all cases, maintain at least 600 CFM at
the projector's top exit port.
To calculate the air flow, use an air flow meter to measure the ft/min or ft/sec where the
duct connects to the projector (measure at this end only). Multiply this reading by the
cross-sectional area of the 8" duct (0.34 sq. ft.) to calculate the CFM airflow:
Measured linear ft/min x 0.34 = CFM
Given the area of the exhaust duct, the measured air flow must be at least 1765 linear
feet per minute (600 ÷ 0.34) in order to maintain 600 CFM.
• Use a duct that is no less than 10 inches and no more than 6 feet long; see Figure 3-8.
To prevent possible transfer of fan vibration to the image, do not mount the extractor
directly on the projector — include at least 10 inches of duct.
• For longer exhaust runs at your site, add extractors/boosters as necessary. The vane
switch at the projector's top exit port will trigger a projector shutdown if the airflow is
inadequate.
Note
Do not operate the projector without an extractor fan installed!
Do not exceed 6-ft. duct length without adding additional
extractors.
28 Runco SC-1 Owner's Operating Manual