This system is easily installed with following these instructions and looking at the wiring diagram in the pics.
HiFlo Lite. First determine the best location for the unit which is typically higher in the cabinet and towards the back. One the location is selected, cut a 3 3/4" x 3 3/4" square hole, inserting the unit into the hole, screwing the plate to the cabinet and then installing the desired grill.
Alternate Installation Method. Another option for installation is to drill a 3.5" round hole, mount the fan unit on the inside of the cabinet over the hole and then mount the grill on the outside over the hole.
One tip is may want to plug it into the y-cable prior prior to installing the vent.
Component Unit. This unit is intended to be placed on top of a unit that generates significant heat such as an amplifier, receiver, or control component. This is intended to be powered and controlled through the ALT controller.
DUO Unit. This is intended to simply sit on top of a heat producing component so attach the provided rubber feet and select a position on the desired component.
Temperature Controller. The 3-Fan ALT controller will control 3 sets of fans independently. Typically use the 1st bank fan for the ventilation fan (HiFlo Lite) and run the sensor to the top area of the cabinet and ensure it is not resting directly onto a component as it will not operate properly. The 2nd fan output can be run the Component Unit and the 3rd to the DUO unit.
Power Supply. The power supply is variable voltage and since are using the Basic Controller, the fan speed can be controlled by selecting different voltages. The most common setting is 9V but can use 7V for quieter operation or 12V for more aggressive cooling but at 12V the fans may be audible. If the fans are too loud, turn down one setting.
Wiring. Most wiring uses the 2-pin connector while some components use a 2.1 coax connector which should be provided and needs to be connected to the 2-pin connector end. When plugging wires together, always ensure to align Tip to + or + to +. See the diagram in the pics for different configurations as generally the temperature controller plugs inline between the power supply and fan units.