Installation Manual Essentials 120213
4
INSTALLING THE OUTSIDE AIR INTAKE LOUVER AND DAMPER BOX
Identify the main return duct at the point after any secondary returns feed into the main
return. This is where the damper box will be installed. (Install the damper box to allow for the
shortest and straightest duct runs possible.)
Move the Damper Box to the installation location. Be careful when moving the damper box to
the attic as to not damage the damper or damper actuator.
Install the gable vent and transition, (outside air intake,) on the North side of the building. If
this is not possible, install the gable vent on the West or East side. Installing the gable vent on
the South side may significantly degrade system performance. If installation on the North,
West or East side are not possible, FAMCO recommends using a rooftop intake. Preferred
orientation for roof vents is the same as for gable vents.
Connect a flex duct from the intake transition to the FRESH AIR port on the Damper Box.
Cut the main return duct in a location that will allow re-connection to the damper box. (The
damper box will replace a section of duct, so the duct may need to be shortened to prevent the
restriction of return air.)
Connect the return duct to the RETURN port on the damper box.
Connect the duct leading to the fan to the FAN port on the damper box.
Install the butterfly damper and make it is oriented so gravity pulls it closed when not held
open by airflow.
Identify the damper cable. (Has a large gray and orange connector that connects to the damper
box connector.) Connected to the Damper Box quick connect plug. Run the other end of the
damper cable to the location where the Logic Box will be installed in the conditioned space.
INSTALLING THE OUTDOOR AIR THERMOSTAT
IDEAL
- Install on North side of structure: Shielded from all direct sunlight. Not adjacent to
attic space. Accessible by occupant and for service.
OK
- Install on West side of structure. Shielded from all direct sunlight, (would require a
ventilated enclosure.) Not adjacent to attic space.
