System air fantech FIT 120E User manual

FIT 120E Series
Fresh Air Appliance (FAA/ERV)
Appareil d'air frais (AAF/VRE)
Item #: 445657
Rev Date: 2023-02-09
No. d'article #: 445657
Date de révision: 2023-02-09
Your ventilation system should be installed in conformance with the appropriate provincial requirements or, in the absence of
such requirements, with the current edition of the National Building Code, and / or ASHRAE’s “Good Engineering Practices”.
Votre système de ventilation doit être installé conformément aux exigences de la province où vous habitez ou, à défaut de
telles exigences, conformément à l’édition actuelle du Code national du bâtiment du Canada ou aux « méthodes d’ingénierie
appropriées » de l’ASHRAE.
Fantech reserves the right to modify, at any time and without notice, any or all of its products’ features, designs,
components and specifications to maintain their technological leadership position.
Please visit our website www.fantech.net for more detailed technical information.
Fantech se réserve le droit de modifier partiellement ou entièrement, en tout moment et sans préavis, les
caractéristiques, la conception, les composants et les spécifications de ses produits, afin de conserver sa
position de leader de technologie.
S'il vous plaît visitez notre site siteweb www.fantech.net pour des informations techiques plus détaillées.
United States
10048 Industrial Blvd., Lenexa, KS, 66215
Tel.: [phone] • Fax: [phone]
Canada
50 Kanalflakt Way, Bouctouche, NB, E4S 3M5
Tel.: [phone] • Fax: [phone]
PARTS IN THE BOX
Energy Recovery Ventilator, 1 pc
Ceiling bracket, 1 pc
Angle brackets, 2 pcs
External Damper Wire harness
(for FIT 120E only), 1 pc
Operation and Installation Manual, 1 pc
PIÈCES DANS LA BOÎTE
Ventilateur récupérateur d'énergie, 1 pc
Support muraux, 1 pc
Équerre d'assemblage, 2 pcs
Faisceau de câbles pour volet d'arrêt
mécanique
externe (FIT 120E seulement), 1 pc
Manuel d'installation, 1 pc
Installation and Operation Manual
Manuel d'installation et d'utilisation
®For FIT®
120E-D-EC
only
Model: FIT 120E
Model: FIT 120E-D
Model: FIT 120E-D-EC

Note Warning/
Important
note
Information Technical
information Practical tip
PLEASE READ AND SAVE THESE INSTRUCTIONS
For residential use only
Before installation careful consideration must be given to how this system will operate if connected to
any other piece of mechanical equipment, i.e. a forced air furnace or air handler operating at a higher
static pressure. After installation, the compatibility of the two pieces of equipment must be conrmed by
measuring the airow of the Fresh Air Appliance (FAA) using the balancing procedure found in this manual.
It is always important to assess how the operation of any FAA may interact with vented combustion equipment (i.e.
Gas Furnaces, Oil Furnaces, Wood Stoves, etc.)
Residential FAA ventilation systems are not suitable for pool or spa applications.
Products are designed and manufactured to provide reliable performance, but they are not guaranteed to be 100%
free of defects. Even reliable products will experience occasional failures, and this possibility should be recognized
by the user. If these products are used in a life support ventilation system where failure could result in loss or injury,
the user should provide adequate back-up ventilation, supplementary natural ventilation or failure alarm system, or
acknowledge willingness to accept the risk of such loss or injury.
Your ventilation system should be installed in accordance with the local building code that is in effect, in absence
of such requirements, it is recommenced to check with local authorities having jurisdiction in your area prior to
installing this product.
This product earned the ENERGY STAR® by meeting strict energy efficiency guidelines set by Natural Resources Canada
and the US EPA. This product meets ENERGY STAR requirements only when used in Canada.
To ensure quiet operation of the ENERGY STAR certified H/ERV, each product model must be installed using sound attenua-
tion techniques appropriate for the installation.
The way your heat/energy-recovery ventilator is installed can make a significant difference to the electrical energy you use.
To minimize the electricity use of the heat/energy recovery ventilator, a stand-alone fully ducted installation is recommend-
ed. If you choose a simplified installation that operates your furnace air handler for room-to-room ventilation, an electrically
efficient furnace that has an electronically commutated (EC) variable speed blower motor will minimize your electrical ener-
gy consumption and operating cost.
Installation of a user-accessible control with your product model will improve comfort and may significantly reduce the prod-
uct model’s energy use.

3
TABLE OF CONTENTS
DETERMINING YOUR AIRFLOW REQUIREMENT ......................................................4
INSTALLATION EXAMPLES
Fully dedicated system ................................................................ 5
Partially dedicated system .............................................................. 6
Simplified installation ................................................................. 7
EXTERIOR DUCTING INSTALLATION
Weatherhood Location ................................................................. 9
Installing the ducting to the weatherhood ................................................... 9
INTERIOR DUCTING INSTALLATION
General Tips ........................................................................10
Installing duct to FAA................................................................. 10
Supply & Exhaust air grilles location ...................................................... 10
FAA INSTALLATION ........................................................................ 11
Ceiling Mounting .....................................................................12
Wall Mounting.......................................................................13
AIRFLOW ADJUSTMENT & BALANCING
General preparation ................................................................. 14
Balancing steps .................................................................... 15
WALL CONTROLS ......................................................................... 16
WIRING DIAGRAM ......................................................................... 18
TROUBLESHOOTING .........................................................................20
FAA CORE WASHING INSTRUCTIONS .............................................................21
FAA MAINTENANCE CHART ....................................................................22

4
Room classification Number of rooms CFM (L/s) CFM Required
Master bedroom x 10 L/s (20 CFM) =
Basement yes or no =
Bedrooms x 5 L/s (10 CFM) =
Living room x 5 L/s (10 CFM) =
Others x 5 L/s (10 CFM) =
Kitchen x 5 L/s (10 CFM) =
Bathroom x 5 L/s (10 CFM) =
Laundry room x 5 L/s (10 CFM) =
Utility room x 5 L/s (10 CFM) =
Total Ventilation Requirements (add last column ) =
if yes add 10 L/s (20 CFM)
if no = 0
1 CFM = 0.47 L/s
1 L/s = 2.13 CFM
Room Count Method
DETERMINING YOUR AIRFLOW REQUIREMENT
ASHRAE method
Ventilation Air requirements
Floor area Bedrooms
1 2 3 4 5
Ft2m2CFM L/s CFM L/s CFM L/s CFM L/s CFM L/s
<500 <47 30 128 38 18 45 21 53 25 60 28
205-1000 47-93 45 21 53 24 60 28 68 31 75 35
1001-1500 94-139 60 28 68 31 75 35 83 38 90 42
1501-2000 140-186 75 35 83 38 90 42 98 45 105 49
2001-2500 187-232 90 42 98 45 105 49 113 52 120 56
2501-3000 233-279 105 49 113 52 120 56 128 59 135 63
3001-3500 280-325 120 56 128 59 135 63 143 66 150 70
3501-4000 326-372 135 63 143 66 150 70 158 73 165 77
4001-4500 373-418 150 70 158 73 165 77 173 80 180 84
4501-5000 419-465 165 77 173 80 180 84 188 87 195 91
* ASHRAE 62.2-2016 Table 4.1, Ventilation and Acceptable Indoor Air Quality in Low-Rise Residential Buildings.
Bathroom: If the FAA is going to provide the required local exhaust ventilation for each bathroom with each a continuous 20 CFM
(10 L/s), this ventilation rate can be considered as part of the whole-building ventilation rate.

5
Installation examples
FULLY DEDICATED SYSTEM
BEST FOR NEW CONSTRUCTION
Stale air is drawn from key areas of home (bathroom, kitchen, laundry)
Fresh air supplied to main living areas
1. Stale air is drawn from key areas of the home requiring local exhaust
(bathroom, kitchen, laundry room).
2. Fresh air is distributed directly to habitable rooms in the house
(bedrooms, living room)
3. The FAA’s airflow must be balanced after installation using the procedure
found in the section “AIRFLOW BALANCING”
Suggested installation for:
• Hydronic baseboard
• Inoor heating
• Electric baseboard
• Mini split heat pump
Benets: Provides the best
fresh air distribution in the
house; lowest operation cost
since the furnace/air handler
unit is not needed.
Air from inside
* Unit air flow should be balanced while FAA is on "Normal" speed and
furnace blower is running.
* Ductwork layout may
differ depending on model
Stale air to
outside
Fresh air from
outside
Fresh air to
living areas
Outside

6
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
1 m (3' 3")
min.
recommended
Cold air
return
* Ductwork layout may
differ depending on model
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)
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 19.
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"
Stale air to
outside
Fresh air from
outside
Fresh air to
living areas
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
• Recommended units: FIT
120E-D and FIT 120E-D-EC
– to avoid drawing outdoor
air directly into the furnace
when the unit is not
running
Benets: Conditions the
fresh air prior to
distributing it throughout the
house
PARTIALLY DEDICATED SYSTEM (BETTER)
Outside
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”

7
Air from inside
* Unit air flow should be balanced while FAA is on "Normal" speed and
furnace blower is running.
Outside
1 m (3' 3")
min.
recommended
Cold air
return
* Ductwork layout may
differ depending on model
FAA/Furnace ducting for Simplified Installation - Option 1
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)
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 19.
2. A minimum separation of 1m (3`3’’) 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"
Stale air to
outside
Fresh air from
outside
1 m (3' 3") min. recommended
Fresh air to
living areas
Suggested installation for:
• When bathroom and kitchen
already have local exhaust
system
• May be suitable for
retrotting
• Recommended units: FIT
120E-D and FIT 120E-D-EC
– to avoid drawing outdoor
air directly into the furnace
when the unit is not running
Benets: Least expensive
installation type
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”

8
EXTERIOR DUCTING INSTALLATION
WEATHERHOOD LOCATION
• Decide where your intake and exhaust hoods will be located.
Locating the Intake Weatherhood
• Should be located upstream (if there are prevailing winds) from the
exhaust outlet.
• At a minimum distance to 900 mm (3') away from dryer vents and furnace
exhaust (medium or high efficiency furnaces), driveways, oil fill pipes, gas
meters, or garbage containers.
• At a minimum height of 460mm (18’’) above the ground, or above the level
of expected snow accumulation.
• Ideally, keep weatherhoods 1m (3') from corners.
• Do not locate in the garage, attic, crawl space, or underneath deck.
Locating the Exhaust Weatherhood
• At least 460mm (18") above ground or above the depth of expected snow accumulation
• Ideally, keep weatherhoods 1m (3') from corners.
• Not near a gas meter, electric meter or a walkway where fog or ice could create a hazard
• Do not locate in a garage, workshop or other unheated space
INSTALLING THE DUCTING TO THE WEATHERHOODS
A well designed and installed ducting system will allow the FAA to operate at its
maximum efficiency. The inner liner of the flexible insulated duct must be secured to the
sleeve of the weatherhood (as close to the outside as possible) and to the appropriate duct
connection on the FAA. The insulation should remain full and not crushed. The outer liner,
which acts as a vapor barrier, must be completely sealed to the outer wall and the FAA
using tape and/or caulking. A good bead of high quality caulking (preferably acoustical
sealant) will seal the inner flexible duct to both the FAA duct connection and the
weatherhood prior to securing them.
To minimize airflow restriction, the flexible insulated duct that connects the two outside
weatherhoods to the FAA should be stretched tightly and be as short as possible.
Twisting or folding the duct will severely restrict airflow.
See “Installation Diagram Examples” for installation examples.
1Using the duct connection of
the outside hood, outline the
intake & exhaust holes to be
cut. The holes should be slightly
larger than the duct connection
to allow for the thickness of the
insulated flexible duct. Cut a
hole for both the intake and
exhaust hoods.
3 Push the hood into the opening
and then attach the hood to the
outside wall with mounting
screws.
Repeat the installation
procedure for both the supply
and exhaust hoods.
2Pull the insulated flexible duct
through the opening until it is
well extended and straight.
Slide the duct’s inner vinyl sleeve
over the hood duct connection
and secure. Pull the insulation
over the duct and pull the vapor
barrier over the sleeve. Secure
with appropriate tape or
sealant.
4Using a caulking gun, seal
around both hoods to prevent
any leaks.
STEPS FOR HOOD INSTALLATION:
36" (1m)
min.
INTAKE
OUTSIDE CORNER INSIDE CORNER
EXHAUST
18" (460mm) min. 18" (460mm) min.
6' (2m)
min.
36” (1m)
min.

9
Interior ducting installation
• To maximize airflow through the ductwork system, all ducts should be kept short and have as few bends or elbows as possible.
• 45º elbows are preferable to 90º.
• Use “Y“ ducts instead of “T” ducts whenever possible.
• All duct joints must be fastened with screws or duct sealant and wrapped with aluminum foil duct tape to prevent leakage.
• Galvanized ducting from the FAA to the living areas in the house is recommended whenever possible, although flexible ducting
can be used in moderation when necessary.
• To avoid possible noise transfer through the ductwork system, a short length (approximately 300 mm, 12’’) of nonmetallic flexible
insulated duct should be connected between the FAA and the supply/exhaust ductwork system.
• The main supply and return line to/from the FAA must have the same diameter as the duct connection or larger.
• Branch lines to the individual rooms may be as small as 100 mm (4’’).
Installing ducting to FAA
For flexible duct installation, slide flexible ducting onto duct connection. Then install a
cable tie over flexible duct to prevent leakage between the ducting and the duct
connection.
In the case of solid ducting, slide duct over duct connection, screw in place and seal.
Supply air grilles location
In homes without a forced air furnace, fresh air should be supplied to all habitable rooms, including bedrooms and living areas. It should be supplied
from high wall or ceiling locations. Grilles that diffuse the air comfortably are recommended. In homes with a forced air furnace, you may want to connect
the FAA to the furnace ductwork (see information below).
Exhaust air grilles location
The stale air exhaust system is used to draw air from the points in the house where the worst air quality problems occur. It is recommended that return
air ducts be installed in the bathroom, kitchen, and laundry room. Additional return air ducts from strategic locations may be installed. The furnace
return duct may also be used to exhaust from. In this method, the exhaust air is not ducted back from bathrooms, kitchens, etc to the FAA with
“dedicated lines”.
As per building codes and installation requirements for combustion appliances:
Air return ducts, or openings for air return, should not be placed in enclosed spaces containing combustion
appliances that are subject to spillage.
*Collars may differ depending on the unit.

10
FAA installation
LOCATION
The FAA must be located in a conditioned space where it will be possible to conveniently service the unit. Typically
the FAA would be located in the mechanical room or an area close to the outside wall where the weatherhoods will
be mounted. If a basement area is not convenient or does not exist, a utility room may be used.
Attic installation must meet the following conditions:
• Attic temperature must be above freezing conditions at all times and for best performance should be 12°C
(54 °F).
• The condensate drain (if included) must be installed so that the condensate drains and is protected from freezing.
• The attic is easily accessible for equipment maintenance and inspection.
Connecting appliances to the FAA is not recommended. These include:
• Clothes dryer
• Range top
• Stovetop fan
• Central vacuum system
• Bathroom exhaust fans unless they are specifically designed for this purpose
These appliances may cause lint, dust or grease to collect in the FAA, damaging the unit.
Connecting any of these types of appliances to the
FAA will void your warranty.
• Have a nearby power supply
(120 volts, 60Hz)
• Choose a location which
allows the possibility
of mounting the unit to
supporting beams.
• To minimize noise, do not
install unit in living area
The unit should be installed in the wall mounted position in re-
gions where the outdoor temperature is 13°F (-25°C) or less for
48 consecutive hours or more while the indoor relative humidity
is at 40% or more.

11
3 Slide the unit the bracket as shown above.
1 Using the screw with washer mount the mounting bracket through the
rubber insulator. Ensure the bracket is straight.
Mounting
CEILING INSTALLATION
2 Using the screw with washer mount the brackets at the bottom of the
unit.
4 Secure both side of the unit using the same method as step 1.
We recommend placing the duct on the unit at this
stage of the unit's installation.

12
Mounting
WALL INSTALLATION
1 Using the screw with washer mount the mounting bracket through the
rubber insulator. Ensure the bracket is straight.
3 Slide the unit in the bracket and secure with setting screw.
2 Using the screw with washer mount the brackets at the bottom of the
unit.

13
Airflow balancing
Balancing must be completed using the Fantech Programmable Touch
Screen Wall Control
ENTERING BALANCING MODE
In the options menu during the initial 5 second countdown
sequence, long press on "ECO" area for 5 seconds to
enter basic balancing mode. The supply and exhaust
fans are adjusted on high speed only and the offsets
are proportionally applied to the medium and low speed
automatically.
STAGE 1
(ADJUST LEVEL OF EXHAUST FAN IN HIGH
SPEED):
• In this step, balance exhaust fan and
measure airow on the exhaust air side
• Pressing on "up" or "down" will adjust the fan
speed in increments of 1%.
• Once the desired exhaust airow is reached,
press on "next" and move on to the next
stage.
STAGE 2
(BALANCE SUPPLY FAN ONLY IN HIGH
SPEED):
• In this step, balance supply fan and measure
airow on the supply air side
• Pressing on "up" or "down" will adjust the fan
speed in increments of 1%.
• Once happy with the outcome, press on
"next" to complete balancing
• The supply and exhaust offset values will be
proportionally applied to low and medium
speed as well.
AUTO MANUAL
OPTIONS
AUTO MANUAL
OPTIONS
NEXT
AUTO MANUAL
OPTIONS
NEXT
0 %
ADJUST
AUTO MANUAL
OPTIONS
NEXT
0 %
BALANCE

14
WALL CONTROLS
CENTRAL CONTROLS
These cannot be used with another central control
*Maintain polarity between control and HRV (+ →+ ; - →-)
ECO SERIES* FEATURES CONNECT TO
ECO-Touch® • Our most complete, yet easy-to-use control system
• Sleek design with backlight touchscreen LCD
• ECO mode selects the best operating mode and speed for the season, minimizing energy use associated with
ventilation
• Set preferred indoor relative humidity range and ventilation mode for day and night conditions
• No battery to replace, all programmed settings are retained during power outages
• Maintenance reminder indicator
• Error code messages reduce troubleshooting time
B
A
→
D+
ECO-Touch®IAQ • Integrated VOC Sensor
• Our most complete, yet easy-to-use control system
• Sleek design with backlight touchscreen LCD
• ECO mode selects the best operating mode and speed for the season, minimizing energy use associated with
ventilation
• Set preferred indoor relative humidity range and ventilation mode for day and night conditions
• No battery to replace, all programmed settings are retained during power outages
• Maintenance reminder indicator
• Error code messages reduce troubleshooting time
ECO-Feel™ • ECO mode selects the best operating mode and speed for the season, minimizing energy use associated with
ventilation
• Integrated VOC Sensor
• No battery to replace, all programmed settings are retained during power outages
1. Ensure that unit is not plugged when connecting the control
2. Recirculation mode is only available with the Flex100H ES, HERO series and the models with the “R” sufx at the end of the model
number.
The wiring connectors can be removed for easier connection.
* Please see instruction manuals for individual controls for proper wiring and set up of control systems.

15
AUXILIARY CONTROL – These controls can be paired with central controls or combined together.
*Maintain polarity between control and HRV (+ →+ ; - →-)
RTS SERIES FEATURES CONNECTS TO
• Wireless timer
• Can only be paired with the ECO-Touch IAQ
• 20/40/60 minute timer with LED light
• Boosts system to high speed with the touch of a button
• Up to 5 can be used in one system
• Use in bathroom, kitchen, laundry room
Connects wireleslly to the
RTS2* • 20- minute timer with LED light
• Boosts system to high speed with the touch of a button
• Up to 5 can be used in one system
• Use in bathroom, kitchen, laundry room
+T
-T
RTS5* • 20/40/60 minute timer with LED light
• Boosts system to high speed with the touch of a button
• Up to 5 can be used in one system
• Use in bathroom, kitchen, laundry room
WALL CONTROLS (CONT'D)
MDEH SERIES FEATURES CONNECT TO
MDEH1 • Rotary dial Dehumidistat
• Multiple units can be used
• We recommend setting the relative humidity above 80% during the summer
D
D
EDF SERIES FEATURES CONNECTS TO
EDF8 • MODE button provides 3 modes of operations: VENTILATION, RECIRCULATION, and STANDBY mode.
• User selected fan speed: Reduced, Medium, Normal, and 20 minutes per hour.
• AUTO setting allows the homeowner to deactivate the dehumidistat.
• When the humidity exceeds the desired setpoint, the ventilation system operates at normal speed.
• Once the desired humidity level is achieved, your ventilation system resumes to its previous mode of
operation.
EDF3 • Press button once for ECONO mode: continuous low or medium speed.
• Press button twice for 20 MIN/H mode: the unit will cycle 20 minutes ON/40 minutes OFF at intermit-
tent speed and repeat.
• Press button three times for CONT mode: the unit will run continuously in ventilation or recirculation on
HIGH speed.
W
W

16
Wiring diagram - FIT 120E & FIT 120E-D
Observe polarity on all accessory controls where
applicable.

17
Wiring diagram - FIT 120E-D-EC
Observe polarity on all accessory controls where
applicable.

18
W
R
G
C
Y
WR G Y
Standard Furnace Interlock Wiring
THERMOSTAT
TERMINALS
FURNACE
24-VOLT
TERMINAL BLOCK
FOUR
WIRE
TWO WIRE
heating only
TWO
WIRE
COOLING SYSTEM
W
R
G
C
Y
WR G Y
Alternate Furnace Interlock Wiring
THERMOSTAT
TERMINALS
FURNACE
24-VOLT
TERMINAL BLOCK
FOUR
WIRE
TWO WIRE
heating only
TWO
WIRE
COOLING SYSTEM
WIRE JOINT
Wiring diagram (CONT'D)
WIRING DIAGRAM TO
FURNACE
FOR A FURNACE
CONNECTION TO
A COOLING SYSTEM:
On some newer furnaces and older
thermostats, energizing the R and
G terminal at the furnace has the
effect of energizing the Y at the
thermostat and thereby turning on
the cooling system. If you identify this
type of thermostat, you must use the
“Alternate Furnace Interlock Wiring”
Standard Accessory Control Contact
Alternative Accessory Control Contact
As per building codes and installation requirements for combustion appliances:
Air return ducts, or openings for air return, should not be placed in enclosed spaces containing combustion
appliances that are subject to spillage.

19
Troubleshooting
Problem Causes Solutions
Air is too dry Dehumidistat control is set too low Increase the desired level of humidity. Change ventilation mode from
continuous mode to standby.
FAA out of balance Have contractor balance FAA airows
Air is too humid Dehumidistat control is set too high Reduce the desired level of humidity. Combine this with the use of continuous
exchange mode.
Sudden change in temperature Wait until outside temperature stabilizes (winter). Heating will also improve
situation.
Storing too much wood for heating Store a majority of your wood outside. Even dried, a cord of wood contains
more than 20 gallons of water.
Dryer vent exhaust is inside home Make sure the dryer vent is exhausting outside.
Poor air circulation near windows Open curtains or blinds.
FAA out of balance Have contractor balance FAA airows
Well sealed basement door is closed Open the door or install a grill on the door.
Persistent condensation
on window
Improper adjustment of dehumidistat control Reduce the desired level of humidity. Combine this step with use of continuous
exchange mode.
FAA out of balance Have contractor balance FAA
Poor air circulation near windows Open curtains or blinds.
Poor Air Flows 1/4" (6mm) mesh on the outside hoods is plugged Clean exterior hoods or vents
Filters plugged Remove and clean lter
Core obstructed Remove and clean core
Indoor grilles closed or blocked Check and open grilles
Inadequate power supply at site Have electrician check supply voltage
Ductwork is restricting airow Check duct installation
Improper speed control setting Increase the speed of the FAA (i.e. change unit control from REDUCED to NORMAL
speed)
FAA airow improperly balanced Have contractor balance FAA airows
Ducting has fallen down or been disconnected from FAA Have contractor reconnect ducting
Supply air feels cold Poor location of supply grilles, the airow may irritate
the occupant
Locate the grilles high on the walls or under the baseboards, install ceiling
mounted diffuser or grilles so as not to directly spill the supply air on the
occupant (eg. Over a sofa)
Turn down the FAA supply speed. A small duct heater (1kw) could be used to
temper the supply air
Placement of furniture or closed doors is restricting the movement of air in
the home
Outdoor temperature extremely cold If supply air is ducted into furnace return, the furnace fan may need to run
continuously to distribute ventilation air comfortably
FAA and/or Ducts frosting up FAA air ows are improperly balanced Have HVAC contractor balance the FAA airows
Malfunction of the FAA defrost system Note: minimal frost build-up is expected on cores before unit initiates defrost
cycle functions
Condensation or Ice Build Up in
Insulated Duct to the Outside
Incomplete vapor barrier around insulated duct Tape and seal all joints
A hole or tear in outer duct covering Tape any holes or tears made in the outer duct covering
Ensure that the vapor barrier is completely sealed.
LED is ashing Everything is in good operation
No power is being transmitted to the Control Board Make sure unit is plugged in.
Transformer may need replacing
Note: It is best to get the unit checked by a certied HVAC Contractor/Technician.

20
Filters and FAA core washing instructions
For proper maintenance of your energy recovery core please follow these instructions
7
8
5
6
1 To remove the door, loosen both latches on
the bottom of the unit.
2 Rotate the metal plate holding the FAA core
in place.
3Remove both lters. Wash lters in warm
soapy water then rinse and let dry.
4Remove the core from the unit.
5With one of your core's air inlets facing
down, place it in a large sink, bathtub, or
shower.
6Pour clean tap water through the face of the
core facing upwards until it runs clear.
Ensure the entire surface is rinsed.
7Rotate the core so that its other air inlet is
facing down and repeat step 5.
8With plates still oriented vertically allow the
core to dry, normally 2-3 hours.
9Replace the lter.
10 Slide back the core into the system making
sure that the arrow points to the motors.
Rotate the metal plate holding the FAA Core
in place.
11 Reattach the door.
12 Close the door, and secure both latches.
3
10
2
2
9
9
1
1
11
11