SystemAir Fantech ATMO Series User Manual

6
INSTALLATION EXAMPLES (CONT'D)
DIRECT CONNECTION of the FRESH air to living area to the RETURN PLENUM
of the AIR HANDLER (Stale air drawn from key areas of home)
PARTIALLY DEDICATED SYSTEM (BETTER)
Suggested installation for:
• Central furnace (air
handling unit or central air
conditioners)
• When ducting fresh air to
living area is not possible or
practical, i.e. expensive or
when the central AHU will
operate year-round.
Benets: Conditions the fresh
air prior to
distributing it throughout the
house
1. In order to provide proper distribution of the fresh air, it is
recommended that the furnace blower be set to run continuously or
interconnected with FAA.
See furnace electrical connection on page
16.
2. Stale air is drawn from key areas of the home (bathroom, kitchen,
laundry room).
3. Fresh air is supplied to the return air plenum of the furnace.
4. Due to the difference in pressure between the FAA and the equipment
it is being connected to the FAA's airflow must be balanced on site,
using the procedure found in the section “AIRFLOW BALANCING”
* In the case of a multi-zone system, please contact Fantech customer
service prior to installing any installation type requiring the use of the
furnace interlock"
FAA/Furnace ducting for Partially Dedicated System
Air from inside
* Unit air flow should be balanced while FAA is on "Normal" speed and
furnace blower is running.
Air return
Cold air
return
* Ductwork layout may dif-
fer depending on model
Stale air to
outside
Fresh air from
outside
Fresh air to
living areas
Make sure the FAA is
capable of meeting the
required airow rate.
For Fresh Air Appliances (FAAs) that do not include an outdoor air motorized damper: If
you are using a partially dedicated or simplied installation, i.e. connecting the FAA supply
air duct to a furnace's return air duct, the FAA must operate continuously. When the FAA
is turned off, no warm exhaust air will ow through the FAA but the furnace's fan will
continue to draw in outdoor air directly into the furnace. If it's cold outside, cold air will be
introduced, without re-heating, directly into the furnace.
If the FAA is installed such that the homeowner may turn off the FAA during the winter, we
recommend installing a motorized damper between the FAA's supply air and the furnace's
return air duct that closes when the FAA is not operating. To install a damper accessory to
the product, locate the auxiliary connector on the side of the electrical box. See Figure 1.
Using the included wire harness, connect the damper accessory to the product.
Figure 1
*Auxiliary connector for external damper wire
harness, damper motor not included.

SystemAir Fantech ATMO Series Specifications

General

Brand	SystemAir
Model	Fantech ATMO Series
Category	Fan
Language	English