FSFXXAOA1180: Installation and User Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
3
Comfort Mode
Should the air inside your house become too humid, or if such conditions
want to be prevented, the operation mode of your Supply Fan can be
changed from a Code-Compliant one (modes 1 to 3) to a Comfort Mode
(modes A to E). Refer to the map in
right choice.
When making such change, make sure to only change the Mode and to
leave the Run time % as it was set by your installer. If in doubt, refer to
your HVAC contractor.
Planning
Installation Zones
The FSFXXAOA1180 unit can be installed in climatic zones 1 to 4 as
defined by the Department of Energy (refer to
for the map), whether as a stand alone unit or connected to the ducting of
an AHU. Installation in any other climatic zone may cause damage to the
house.
Installation Types
IMPORTANT:
Always use insulated ducting of a minimum R-4
insulation factor. Duct diameter equal or larger than port size is
recommended.
Stand-Alone Installation
The installer shall ensure that, if necessary, an in-line heater sized
according to required airflow and outside design heating temperature
from Manual J or ASHRAE table is installed to avoid condensation on
uninsulated duct distribution systems within the house or surfaces near
the distribution register. The in-line heater shall have an integrated
airflow sensor and an over temperature sensor to prevent heating in
no-flow or low-flow conditions.
A200588
When deciding if a preheater is required and whether it should be
installed BEFORE or AFTER the supply fan, consider the following:
• This supply fan’s minimum operating temperature is 14 °F.
• The minimum distance between the preheater and the supply fan is 12
inches.
• The temperature distributed in the ducting should not be below 55 °F.
Installation with an AHU
The installer shall ensure that, if necessary, an in-line heater sized
according to required airflow and outside design heating temperature
from Manual J or ASHRAE table is installed to ensure that the air
delivered to the AHU is never below the minimum temperature allowed
by the manufacturer (generally 55 °F). The in-line heater shall have an
integrated airflow sensor and an over temperature sensor to prevent
heating in no-flow or low-flow conditions.
A200589
When deciding if a preheater is required and whether it should be
installed BEFORE or AFTER the supply the supply fan runs. Refer to
(Wiring and Logic Diagrams on p7)
for wiring configurations.
Preparation
IMPORTANT:
This unit has to be provided with a low voltage power
source (AHU or other), refer to WIRING.
1. Remove the unit from the box and inspect for damage. Installation
hardware is located in a plastic bag along with this guide, on top of
the filler.
2. Put the unit down on a protected surface.
3. Open the unit’s door and remove the filter to allow for more room
to work in the electronic compartment.
NOTE:
This unit reads temperature and relative humidity every hour
and uses this data to choose the best time of the day to ventilate,
according to the chosen mode's preset limits.
4. Refer to the table below. Choose the mode you want the unit to
operate in and note it down in the space provided for that purpose
on the unit's label.
5. Refer to your local building code to determine the required airflow.
6. Refer to the tables below. Find out what speed and run time
percentage the unit has to be set in to provide the required airflow,
and note down the chosen values in the space provided for that
purpose on the unit's label.
For example: If the required airflow is 90 CFM, the speed switch should
be set to 180 CFM, and the Run time % button, to 50%.
Selected Mode
Climatic Zones
*
*. As defined by the Department of Energy. Refer to the map in Appendix A.
1
- Ashrae 2016
Zones 1-4
2
- Ashrae 2010 (factory setting)
Zones 1-4
3
- IRC / IMC 2012-2015
Zones 1-4
A
- Comfort mode Hot / Humid #1
Zones 2A and 1
B
- Comfort mode Hot / Humid #2
Zones 1 and 2A
C
- Comfort mode Hot / Dry
Zone 2B
D
- Comfort mode Mixed / Humid
Zones 3A, 4A, 3C and 4C
E
- Comfort mode Mixed / Dry
Zones 3B and 4B
Selected Mode
*
*. Refer to the label on the inlet or to Appendix B for the full limits table.
Climatic Zones
†
†. As defined by the Department of Energy. Refer to map in Appendix A.
1
- Ashrae 2016
Zones 1-4
2
- Ashrae 2010 (factory setting)
Zones 1-4
3
- IRC / IMC 2012-2015
Zones 1-4
A
- Comfort mode Hot / Humid #1
Zones 2A and 1
B
- Comfort mode Hot / Humid #2
Zones 1 and 2A
C
- Comfort mode Hot / Dry
Zone 2B
D
- Comfort mode Mixed / Humid
Zones 3A, 4A, 3C and 4C
E
- Comfort mode Mixed / Dry
Zones 3B and 4B
AHU
Follow AHU
manufacturer’s
guidelines for
minumum distance.
