System air fantech FIT 120E User manual

Fit™ 120E
Energy Recovery Ventilators
Installation Manual
Item #: 424522
Rev Date: 2016-06-10
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”.
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.
United States
10048 Industrial Blvd., Lenexa, KS, 66215
Tel.: [phone] • Fax: [phone]
Canada
50 Kanalflakt Way, Bouctouche, NB, E4S 3M5
Tel.: [phone] • Fax: [phone]

2
Note Warning/
Important
note
Information Technical
information Practical tip
PLEASE READ THIS MANUAL BEFORE INSTALLING UNIT
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 Energy Recovery Ventilator using the balancing procedure found in this manual.
It is always important to assess how the operation of any ERV may interact with vented combustion equipment (i.e.
Gas Furnaces, Oil Furnaces, Wood Stoves, etc.)
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.

3
TABLE OF CONTENTS
DETERMINING YOUR AIRFLOW REQUIREMENT ..................................................... 4
OPERATING CONDITIONS.......................................................................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 ERV ................................................................ 10
Supply & Exhaust air grilles location ...................................................... 10
ERV INSTALLATION ........................................................................ 11
Mounting ..........................................................................12
AIRFLOW ADJUSTMENT & BALANCING
General preparation ................................................................. 13
Adjusting airflow using integrated balancing system ........................................... 13
Balancing steps .................................................................... 14
LOW VOLTAGE CONTROL SYSTEMS ............................................................. 15
WIRING DIAGRAM ......................................................................... 16
TROUBLESHOOTING .........................................................................18
ERV CORE WASHING INSTRUCTIONS.............................................................19
ERV MAINTENANCE CHART....................................................................20
PARTS LIST ...............................................................................44

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
0-1 2-3 4-5 6-7 >7
Ft2m2CFM L/s CFM L/s CFM L/s CFM L/s CFM L/s
< 1500 <139 30 14 45 21 60 28 75 35 90 42
1501-3000 139.1-279 45 21 60 28 75 35 90 42 105 50
3001-4500 279.1-418 60 28 75 35 90 45 105 50 120 57
4501-6000 418.1-557 75 35 90 42 105 50 120 57 135 64
6001-7500 557.1-697 90 42 105 50 120 57 135 64 150 71
>7500 >697 105 50 120 57 135 64 150 71 165 78
* ASHRAE 62.2-2010 Table 4.1, Ventilation and Acceptable Indoor Air Quality in Low-Rise Residential Buildings.
Bathroom: If the ERV 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.
Operating conditions
This ventilation system is designed to operate under standard humidity and temperature conditions. However, some extreme conditions may cause the
exchanger to freeze or produce an excessive amount of water condensation. This ventilation system should not be operated with an indoor humidity
above 50% in combination with an outdoor temperature below -10°C (14°F) for more than 12 continuous hours.
Residential ERV ventilation systems are not suitable for pool or spa applications.

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 ERV’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 ERV 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

6
ERV/Furnace ducting for Partially Dedicated System
Air from inside
* Unit air flow should be balanced while ERV 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)
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. Furnace blower must operate when ventilation from ERV is required. The
furnace should be set to run continuously or interlocked with ERV
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 ERV and the equipment it is
being connected to the ERV’s airflow must be balanced on site, using the
procedure found in the section “AIRFLOW BALANCING”
Stale air to
outside
Fresh air from
outside
Fresh air to
living areas
Fantech energy recovery ventilators (ERV) that use a supply fan shutdown for frost preven-
tion do not include an outdoor air motorized damper. If you are using a simplied instal-
lation, i.e. connecting the ERV supply air duct to a furnace's return air duct, the ERV must
operate continuously. When the ERV is turned off, no warm exhaust air will ow through
the ERV 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 ERV is installed such that the homeowner may turn off the ERV during the winter, we
recommend installing a motorized damper between the ERV's supply air and the furnace's
return air duct that closes when the ERV is not operating. See wiring diagram (gure 1).
Damper
Motor
24 VAC Transformer
COM NO
ERV Furnace interlock
See page 17.
24V
120V
Figure 1
*Transformer and Damper motor not included

7
Air from inside
* Unit air flow should be balanced while ERV 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
ERV/Furnace ducting for Simplified Installation - Option 1
Installation examples (Cont'd)
DIRECT CONNECTION of both the ERV SUPPLY AIR STREAM and EXHAUST AIR STREAM
to the FURNACE COLD AIR RETURN
SIMPLIFIED INSTALLATION (GOOD)
(RETURN/RETURN METHOD) - OPTION 1
Suggested installation for:
• When bathroom and kitchen
already have local exhaust
system
• May be suitable for
retrotting
Benets: Least expensive
installation type
1. Furnace blower must operate when ventilation from ERV is required. The
furnace should be set to run continuously or interlocked with ERV.
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 ERV’s exhaust air connection
should be upstream of the ERV’s supply air connection when ducting to the
furnace’s cold air return.
4. Due to the difference in pressure between the ERV and the equipment it is
being connected to the ERV’s airflow must be balanced on site, using the
procedure found in the section “AIRFLOW BALANCING”
Stale air to
outside
Fresh air from
outside
1 m (3' 3") min. recommended
Fresh air to
living areas
Fantech energy recovery ventilators (ERV) that use a supply fan shutdown for frost preven-
tion do not include an outdoor air motorized damper. If you are using a simplied instal-
lation, i.e. connecting the ERV supply air duct to a furnace's return air duct, the ERV must
operate continuously. When the ERV is turned off, no warm exhaust air will ow through
the ERV 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 ERV is installed such that the homeowner may turn off the ERV during the winter, we
recommend installing a motorized damper between the ERV's supply air and the furnace's
return air duct that closes when the ERV is not operating. See wiring diagram (gure 1).
Damper
Motor
24 VAC Transformer
COM NO
ERV Furnace interlock
See page 17.
24V
120V
Figure 1
*Transformer and Damper motor not included

8
Air from inside
* Unit air flow should be balanced while ERV 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
ERV/Furnace ducting for Simplified Installation - Option 2
DIRECT CONNECTION of the ERV SUPPLY AIR STREAM to the SUPPLY AIR SIDE on the
FURNACE & EXHAUST AIR STREAM to the FURNACE COLD AIR RETURN
SIMPLIFIED INSTALLATION (GOOD)
OPTION 2
1. Furnace blower must operate when ventilation from ERV is required. The
furnace should be set to run continuously or interlocked with ERV.
2. Due to the differences in pressure between the ERV and the equipment it is
being connected to, the ERV‘s airflow must be balanced on site, using the
procedure found section "AIRFLOW BALANCING".
Installation examples (Cont'd)
In the case of a simplified
installation, Option 1 is
recommended.
Suggested installation for:
• When bathroom and
kitchen already have local
exhaust system
• May be suitable for
retrotting
Benets: Least expensive
installation type
Fresh air to living areas
Stale air to
outside
Fresh air from
outside
Fantech energy recovery ventilators (ERV) that use a supply fan shutdown for frost preven-
tion do not include an outdoor air motorized damper. If you are using a simplied instal-
lation, i.e. connecting the ERV supply air duct to a furnace's return air duct, the ERV must
operate continuously. When the ERV is turned off, no warm exhaust air will ow through
the ERV 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 ERV is installed such that the homeowner may turn off the ERV during the winter, we
recommend installing a motorized damper between the ERV's supply air and the furnace's
return air duct that closes when the ERV is not operating. See wiring diagram (gure 1).
Damper
Motor
24 VAC Transformer
COM NO
ERV Furnace interlock
See page 17.
24V
120V
Figure 1
*Transformer and Damper motor not included

9
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 of 2m (6’) 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.
• At a minimum distance of 1m (3’) from the corner of the building.
• 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
• At least 1m (3’) away from the corner of the building
• 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 ERV 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 ERV. 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 ERV
using tape and/or caulking. A good bead of high quality caulking (preferably acoustical
sealant) will seal the inner flexible duct to both the ERV 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 ERV 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.
Exterior ducting installation
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.

10
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 ERV 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 ERV and the supply/exhaust ductwork system.
• The main supply and return line to/from the ERV 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 ERV
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 ERV 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 ERV 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.

11
ERV installation
LOCATION
The ERV must be located in a conditioned space where it will be possible to conveniently service the unit. Typically
the ERV 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 installations are not normally recommended due to:
• The complexity of the installation
• Freezing conditions in the attic
• Difficulty of access for service and cleaning
Connecting appliances to the ERV 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 ERV, damaging the unit.
Connecting any of these types of appliances to the
ERV 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

12
2 Insert screws with washers on both side of the bracket to secure.1 Insert the middle screw with washer in the mounting bracket through
the rubber insulator. Ensure the bracket is straight.
Mounting
MOUNTING BRACKET
4 Install the unit by sliding the unit in the guide of the ceiling bracket.
We recommend placing the duct on the unit at this
stage of the unit's installation.
3 Remove the screw and the washer on the unit to install bracket 4 Install bracket and replace screw and washer. Repeat step 3 and 4 on
the other side of the unit.

13
Mounting
CHAIN - OPTION
1 Place your fastening hooks on the strapping board, the
oor joists or underneath the concrete oor.
2 Attach a hanging chain to each screw paired with a
washer (provided) in the top 4 corners of the unit and
tighten.
3 Install a spring on each chain. Hook the spring in the
links so a loop is created in the chain. The spring will
then support the unit's weight and absorb vibrations.
4 Hang the unit by slipping a link onto the hanging hooks,
making sure the unit is level.
6 Secure both side of the unit using the same method as step 1.

14
Airflow adjustment & balancing
BALANCING THE AIRFLOWS IS CRUCIAL TO ENSURE OPTIMAL OPERATION OF THE UNIT. IF THE AIRFLOW IS NOT PROPERLY BALANCED, THE
FOLLOWING ISSUES MAY OCCUR:
• SIGNIFICANT POSITIVE OR NEGATIVE PRESSURE INSIDE THE HOUSE
• UNIT’S EFFICIENCY MAY BE NEGATIVELY AFFECTED
• UNIT’S DEFROST MAY NOT WORK EFFECTIVELY
• CAN LEAD TO AIR LEAKS OR BACKDRAFTING OF ANY COMBUSTION APPLIANCES.
The airflow adjustment and balancing procedure consists of adjusting the fresh airflow to make sure it meets the requirements for the building and then
balance the system to make sure there is an equal amount of stale air being exhausted. In the case that the airflow is not exactly the same, it is
recommended to have a higher stale airflow of up to 10% in colder climates to ensure that the temperature of the fresh airflow coming from the outside
is as close to the room temperature as possible.
GENERAL PREPARATION:
Before performing the adjustment and balancing for unit, make sure to check the following:
• Seal all the ductwork
• Fully open all dampers (if present)
• Turn off all other exhaust appliances such as range hood, dryers, bathroom fans, etc.
• If performing balancing during cold weather, make sure the unit is not operating in defrost mode.
• If the installation type is Simplified or Partially Dedicated, make sure that the furnace/air handler blower is operating at normal speed during
the balancing sequence.
• When reading with a mechanical type manometer (Magnehelic), make sure the manometer is placed on a level surface
For optimal performance, ERV unit should be re-balanced after a major renovation or after the installation of extra grilles or registers.
• In cold climates, continuous excessive positive pressure inside the house may drive moisture inside the external walls of the
house. Moisture present inside the external wall may condense if the outside temperature is cold enough and can cause damage
to structural components. A symptom of excessive positive pressure inside a house is frozen door locks.
• Continuous excessive negative pressure can have undesirable effects. In some geographic locations, negative pressure can
increase the infiltration of soil gases such as methane and radon. Negative pressure is also undesirable where combustion
equipment is present and may cause back drafting of the combustion gases.
ADJUSTING AIRFLOWS USING INTEGRATED BALANCING SYSTEM
Adjustable dampers are integrated into the Fresh Air to Building and the Stale Air to Outside duct connections. Those dampers replace the installation of
separate back draft and balancing dampers in the duct line.
The integrated dampers are preset at the fully opened position. In order to reduce the amount of airflow, turn the adjustable lever using a flat screw driver
by turning it counter clock wise. Turning the lever clockwise may damage the plastic screw head. Follow the balancing steps to properly adjust the airflow.

15
Airflow balancing (Cont'd)
1Cut hole in duct and insert flow measuring
station. Make sure that the flow measuring
station’s air direction arrow points in the
direction of the airflow. Secure the flow
measuring station with aluminum foil tape.
2Before taking the reading, make sure that
the magnehelic gauge is level and at 0.
Refer to the flow measuring station’s
chart to determine your unit’s airflow
velocity.
3Adjust the “Supply Air Out” damper until
you reach the desired velocity. Follow
steps 1-3 to adjust the “Exhaust Air Out”
damper, if needed.
Measure
here Minimum
457mm
(18")
Measure
here
Minimum
457mm (18")
• To avoid airflow turbulence and incorrect
readings, the airflow velocity should be
measured on a section of steel ducting.
Reading should also be taken at a minimum
distance of 457 mm (18") from the unit or
elbow. Measurement should also be made
prior to any transition in the duct work so
entire airflow is measured.
Measuring the airflow using station (grid) method
Adjusting airflows
A damper is integrated into the Fresh Air to Building collar. This damper replaces the installation of a separate damper into the Fresh
Air to Building ducting line.
The damper-collar is pre-set in the fully opened position. If the procedure requires a reduction in airflow to the fresh air duct, simply
turn the adjustable arm located on the side of the collar counter clockwise until desired airflow is obtained.
WARNING! DO NOT TURN ADJUSTABLE ARM CLOCKWISE WHEN DAMPERS ARE FULLY OPENED AS DAMAGE MAY OCCUR TO THE
MECHANISM
Illustration #1

16
Low voltage control systems
* Please see instruction manuals for individual controls for proper wiring and set up of control systems.
CENTRAL CONTROLS
These control options can only be used individually
CONTROLS 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 outage
• Maintenance reminder indicator
• Error code messages reduce troubleshooting time
EDF7 • MODE button provides 3 modes of operations:
Ventilation, Recirculation and Standby
• 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
EDF1 • Press button once for continuous Reduced speed
• Press button twice and the unit will cycle 20 minutes ON/
40 minutes OFF and repeat
• Press button a third time and the system will run
continuously on Normal speed
AUXILIARY CONTROL – These controls can be paired
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
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
MDEH1 • Rotary dial Dehumidistat
• Multiple units can be used
• We recommend setting the relative humidity above 80%
during the summer
1. Ensure that unit is
not plugged when
connecting the
control
2. Recirculation mode is
only available with the
“R” sufx at the end
of the model number.
*Maintain polarity
between control
and ERV
(+ →+ ; - →-)
W
W
W
W
+T
-T
+T
-T
W
W
D
D

17
Wiring diagram
HIGH
SPEEDS
LOW
55V
JP5 JP3
75V
120V90V
LOW
JP3
JP5
HIGH
120V90V
75V
55V
SPEEDS
 
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.
ERV out of balance Have contractor balance ERV 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.
ERV out of balance Have contractor balance ERV 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.
ERV out of balance Have contractor balance ERV
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 ERV (i.e. change unit control from REDUCED to NORMAL
speed)
ERV airow improperly balanced Have contractor balance ERV airows
Ducting has fallen down or been disconnected from ERV 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 ERV 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
ERV and/or Ducts frosting up ERV air ows are improperly balanced Have HVAC contractor balance the ERV airows
Malfunction of the ERV 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 ERV core washing instructions
For proper maintenance of your energy recovery core please follow these instructions
6
7
4
5
9
10
8
1
2
3
1Remove the air exhaust lter by sliding it
out.
2Rotate the metal plate holding the ERV core
and intake air lter in place and remove
lter. Wash lters in warm soapy water
then rinse and let dry.
* When cleaning only the lters, make sure
to replace the metal plate after removing
the lter.
3Remove the core from the unit.
4With one of your core's air inlets facing
down, place it in a large sink, bathtub, or
shower.
5Pour clean tap water through the face of the
core facing upwards until it runs clear.
Ensure the entire surface is rinsed.
6Rotate the core so that its other air inlet is
facing down and repeat step 5.
7With plates still oriented vertically allow the
core to dry, normally 2-3 hours.
8Slide back the core into the system making
sure that the arrow points to the motors.
9 Replace the exhaust air lter.
10 Replace the intake air lter and rotate the
metal plate holding the lter and ERV core
in place.