7
INSTALLATION EXAMPLES (CONT'D)
DIRECT CONNECTION of both the FAA SUPPLY AIR STREAM and EXHAUST AIR STREAM
to the FURNACE COLD AIR RETURN
SIMPLIFIED INSTALLATION
(GOOD)
(RETURN/RETURN METHOD)
Suggested installation for:
• When bathroom and kitchen
already have local exhaust
system
• May be suitable for
retrotting
Benets: Least expensive
installation type
1. Furnace blower must operate when ventilation from FAA is required. The furnace should
be set to run continuously or interlocked with FAA.
See furnace electrical connection
on page 16.
2. A minimum separation of 1m (39’’) is recommended between the two direct
connections.
3. In order to prevent exhausting any fresh air, the FAA's exhaust air connection should be
upstream of the FAA's supply air connection when ducting to the furnace’s cold air return.
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"
Air from inside
* Unit air flow should be balanced while FAA is on "Normal" speed and
furnace blower is running.
1 m (3' 3")
min.
recommended
* Ductwork layout may dif-
fer depending on model
FAA/Furnace ducting for Simplified Installation
Stale air to
outside
Fresh air from
outside
Fresh air to
living areas
Motorized
damper
1 m (3' 3")
min.
recommended
Air return
For Fresh Air Appliances (FAAs) that do not include an outdoor air motorized damper: If
you are using a partially dedicated or simplied 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”
To Next Page
Loading...
Need help?
General