Active Thermal Management 3E Installation Instructions

The Active Thermal Management System 3 is a complete ventilating system for small audio/video
enclosures or sections of large enclosures. It is comprised of two high quality 3.125" (80mm) axial-flow fans
with finger guards, a plug-type power supply, and a control unit with remote thermal probe.
The fans are surface-mounted over 3" round holes (see detail on last page). In free air, the fans can each
move approximately 15 cubic feet of air per minute; in a typical installation that figure is typically reduced to
approximately 10 to 12 CFM, sufficient to properly ventilate an enclosure of moderate size. (A popular size for
smaller enclosures is 2' wide, 2' deep, and 2 ½' - 3' high, for a gross volume of only 10 - 12 cubic feet.) When
equipment is installed, the air within the cabinet is further reduced, so that, with proper placement, two small
fans can change all of the air in the enclosure in less than a minute.

Fan location

The location of the two fans is the most important consideration in installing the System 3. Properly
placed, ventilation will be efficient; if improperly located, ventilation will be reduced. The key to effective
ventilation is to place the fans (usually one is used to bring room air in, one used to exhaust heated air) so that a
line drawn between them passes through or over the main heat source(s). If necessary, both fans can be used in
intake or exhaust mode. The hot equipment should lie directly in the path of air flow for maximum effectiveness
of the System 3 (or any ventilating system).
This obviously preferable arrangement is not always easy to achieve in practice. Doors, walls, shelves, etc.,
always seem to be in the way! There are several ways to get around obstacles, and the installer must use his
imagination to achieve the best results in a given installation. Here are some suggestions for fan placement:
Intake fans can be located in or below "kick-panels"; in side walls (for free or semi-free standing cabinets)
or on the back wall, if there is at least 2" clearance between the back of the cabinet and the wall.
Exhaust fans are best located high on the rear panel, but can also be mounted on a side panel or even on the
top surface if there's a video screen or speaker mounted on the top to block the view of the fan.
When installing fans, note that air exits from the side of the fan with the center label. Fans can be
mounted using #6 or #8 screws.
25570 Rye Canyon Rd. Suite D
661-294-7999 (voice)
techinfo@activethermal.com
System 3E Installation Instructions
Active Thermal Management
The trusted name in thermal protection . .
www.activethermal.com
.
Valencia, CA 91355
661-294-1115 (fax)