System air fantech VHR 70 User manual

VHR 70
Heat Recovery Ventilator
Installation Manual
Item #: 426592
Rev Date: 2017-02-28
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 Heat Recovery Ventilator using the balancing procedure found in this manual.
It is always important to assess how the operation of any HRV 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 content
DETERMINING YOUR AIRFLOW REQUIREMENT ..................................................... 4
INSTALLATION EXAMPLES
Fully dedicated system ................................................................ 5
Partially dedicated system .............................................................. 6
Simplified installation
Option 1 .......................................................................7
Option 2 .......................................................................8
EXTERIOR DUCTING INSTALLATION
Weatherhood Location ................................................................. 9
Installing the ducting to the weatherhood ................................................... 9
INSTALLING DUCTS TO / FROM INSIDE
General Tips ....................................................................... 10
Supply & Exhaust Air Grilles Location...................................................... 10
HRV INSTALLATION......................................................................... 12
AIRFLOW ADJUSTMENT & BALANCING ...........................................................13
LOW VOLTAGE CONTROL .....................................................................14
ELECTRICAL CONNECTIONS................................................................... 15
TROUBLESHOOTING ........................................................................ 17
HRV MAINTENANCE CHART ...................................................................18
PARTS LIST ...............................................................................37

4
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 HRV 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
HRV ducting for fully Dedicated System
Stale air from inside
Outside
Fresh air to living areas
Fresh air from
outside
Stale air to
outside
Installation examples
Example only – duct configuration may differ depending on the model.
FULLY DEDICATED SYSTEM
BEST FOR NEW CONSTRUCTION
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 HRV’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.

6
HRV/ Furnace ducting for Partially Dedicated System
Stale air from inside
* Unit airflow should be balanced while HRV is on
“Normal” speed and furnace blower is running.
Outside Fresh air
to living
areas
1 m (3' 3")
min.
recommended
Cold air
return
Stale air to
outside
Fresh air from
outside
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)
1. Furnace blower must operate when ventilation from HRV is required. The
furnace should be set to run continuously or interlocked with HRV. 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 HRV and the equipment it
is being connected to the HRV’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
Fantech heat recovery ventilators (HRV) 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 installa-
tion, i.e. connecting the HRV supply air duct to a furnace's return air duct, the HRV must
operate continuously. When the HRV is turned off, no warm exhaust air will ow through
the HRV 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 HRV is installed such that the homeowner may turn off the HRV during the winter, we
recommend installing a motorized damper between the HRV's supply air and the furnace's
return air duct that closes when the HRV is not operating. See wiring diagram (gure 1).
You may also choose to use a Fantech HRV that uses a recirculation defrost that incorpo-
rates an outdoor air damper.
Damper
Motor
24 VAC Transformer
COM NO
HRV Furnace interlock
See page 15.
24V
120V
Figure 1
*Transformer and Damper motor not included
Motorized Damper
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

7
Stale air from inside
Outside
Fresh air to
living areas
1 m (3' 3")
min.
recom-
mended
Cold air
return
HRV/ furnace for Simplified Installation – Option 1
Installation examples (Cont'd)
DIRECT CONNECTION of both the HRV SUPPLY AIR STREAM and EXHAUST AIR STREAM
to the FURNACE COLD AIR RETURN
SIMPLIFIED INSTALLATION (GOOD)
(RETURN/RETURN METHOD) - OPTION 1
1. Furnace blower must operate when ventilation from HRV is required. The
furnace should be set to run continuously or interlocked with HRV. See
furnace electrical connection on page 16.
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 HRV’s exhaust air connection
should be upstream of the HRV’s supply air connection when ducting to the
furnace’s cold air return.
4. Due to the difference in pressure between the HRV and the equipment it is
being connected to the HRV’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
* Unit airflow should be balanced while HRV is on
“Normal” speed and furnace blower is running.
Fantech heat recovery ventilators (HRV) 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 installa-
tion, i.e. connecting the HRV supply air duct to a furnace's return air duct, the HRV must
operate continuously. When the HRV is turned off, no warm exhaust air will ow through
the HRV 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 HRV is installed such that the homeowner may turn off the HRV during the winter, we
recommend installing a motorized damper between the HRV's supply air and the furnace's
return air duct that closes when the HRV is not operating. See wiring diagram (gure 1).
You may also choose to use a Fantech HRV that uses a recirculation defrost that incorpo-
rates an outdoor air damper.
Damper
Motor
24 VAC Transformer
COM NO
HRV Furnace interlock
See page 15.
24V
120V
Figure 1
*Transformer and Damper motor not included
Motorized
Damper
1 m (3' 3") min. 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

8
* Ductwork layout may differ depend-
ing on model
DIRECT CONNECTION of the HRV 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 HRV is required. The
furnace should be set to run continuously or interlocked with HRV. See
furnace electrical connection on page 16.
2. Due to the differences in pressure between the HRV and the equipment it is
being connected to, the HRV‘s airflow must be balanced on site, using the
procedure found 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
Installation examples (Cont'd)
In the case of a simplified
installation, Option 1 is
recommended.
Air from inside
* Unit air flow should be balanced while HRV is on "Normal" speed and
furnace blower is running.
Outside
Fresh air to living areas
1 m (3' 3") min. recommended
Cold air
return
HRV/Furnace ducting for Simplified Installation - Option 2
Suggested installation for:
• When bathroom and
kitchen already have local
exhaust system
• May be suitable for
retrotting
Benets: Least expensive
installation type
Fantech heat recovery ventilators (HRV) 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 installa-
tion, i.e. connecting the HRV supply air duct to a furnace's return air duct, the HRV must
operate continuously. When the HRV is turned off, no warm exhaust air will ow through
the HRV 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 HRV is installed such that the homeowner may turn off the HRV during the winter, we
recommend installing a motorized damper between the HRV's supply air and the furnace's
return air duct that closes when the HRV is not operating. See wiring diagram (gure 1).
You may also choose to use a Fantech HRV that uses a recirculation defrost that incorpo-
rates an outdoor air damper.
Damper
Motor
24 VAC Transformer
COM NO
HRV Furnace interlock
See page 15.
24V
120V
Figure 1
*Transformer and Damper motor not included
Motorized
Damper
Motorized
Damper
Stale air to
outside
Fresh air from
outside

9
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 HRV 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 HRV. 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 HRV using tape and/or
caulking. A good bead of high quality caulking (preferably acoustical sealant) will seal the inner
flexible duct to both the HRV 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 HRV 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)
INTAKE
OUTSIDE CORNER INSIDE CORNER
EXHAUST
18" (460mm) 18" (460mm)
3' (900mm)
min.
36” (1m)

10
Installing ducts to / from inside
To maximize airflow in the ductwork system, all ducts should be kept short and have as few bends or elbows as
possible. Forty-five degree are preferred to 90º elbows. Use “Y” tees instead of 90º elbows whenever possible.
All duct joints must be fastened with screws or duct sealant and wrapped with a quality tape to prevent leakage.
Aluminum foil duct tape is recommended. Galvanized ducting from the HRV to the living areas in the house is
recommended whenever possible, although flexible duct can be used in moderation when necessary.
The VHR 70 should be installed with a 4” (100mm) duct system that has less than 80 ft (25m)
of equivalent duct length on the supply and on the exhaust side. If longer runs are required,
increasing the duct diameter or following the instructions below might help.
It is the responsibility of the installer to ensure all ductwork is sized and installed as designed to
ensure the system will perform as intended. All air movement devices have a performance curve.
The amount of air (CFM) that an HRV will deliver is directly related to the total external static
pressure (E.S.P.) of the system. Static pressure is a measure of resistance imposed on the blower by length of duct
work/number of fittings used in duct work, duct heater etc.
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 such as
Fantech Contour Grilles are recommended. To avoid possible noise transfer through the ductwork system, a short
length (approximately 12”, 300 mm) of nonmetallic flexible insulated duct should be connected between the HRV and
the supply/exhaust ductwork system.
If the floor is the only option available, then special care should be taken in locating grilles. Areas such as under
baseboard heaters will help to temper the air. Also optional inline duct heaters are available for mounting in the
supply duct work to add heat if required. In homes with a forced air furnace, you may want to connect the HRV to
the furnace ductwork (see information below).
Exhaust air ducting
The stale air exhaust system is used to draw air from the points in the house where the worst air quality problems occur. Due to its lower capacity,
the VHR 70 is designed to vent from a single source point only and to the bathroom that is closest to the unit or directly out of the furnace return.
Additional source points may be drained from if designed properly or installed on a separate Fantech fan bath kit to ventilate additional areas. Fantech
bath kits are listed below and are ideal for both new construction and retro fit.
• Building Codes and
Combustion Appliance
Installation Codes do not
allow location of return air
grilles or any opening such
as a “breathing tee” in an
enclosed room with spillage
susceptible combustion
appliances.
• The fresh air inlet from
the HRV needs to respect
a minimum distance
from the furnace return
drop to ensure proper air
mixing and temperature
at the furnace core. See
furnace manufacturer for
appropriate specications.

11
HRV installation
Location
The HRV must be located in a conditioned space where it will be possible to conveniently service the unit. Typically
the HRV 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 HRV 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 HRV, damaging the unit.
Mounting – Wall Mount
1. Attach bracket to wall
2. Lift unit & slide nuts into slots on bracket
3. Tighten screws to secure unit to bracket
4. Ensert the safety screws & place wall bumpers to level off the unit.
* Optional chain hanging kit available.
• Install the unit close to the
outside wall on which the
supply and exhaust hoods
will be mounted.
• Have a nearby power supply
120 Volts, 60Hz. (power
cord is 3 feet long)
• Mount the unit as level as
possible in order to allow
proper condensate drainage.
• Have access to a water
drain for the condensate of
the unit during defrost.
• Have a certain amount
of heat around the unit
(attic installation is not
recommended).
• Installations close to the
living space, such as closets,
should be design and to
minimize noise or vibration
transfers.
• • Have access for future
maintenance. (10” is
recommended for removal
of core)
Connecting any of
these types of
appliances to the
HRV will void your
warranty. Safety screws (included)
Place bumpers on
back
of unit (included)
16” (406mm)

12
1 Remove the nutsert.
INSTALLING DRAIN LINE
Through normal operation and during its defrost mode, the HRV may produce some condensation. This water should flow into a nearby drain, or be taken
away by a condensate pump. The HRV and all condensate lines must be installed in a space where the temperature is maintained above the freezing point.
A “P” trap should be made in the drain line. This will prevent odors from being drawn back up into the unit.
2 Invert the drain nipple. Make
sure to place gasket between
the unit and the drain nipple
inside the unit.
3 Secure the drain nipple using
the nutsert.
4 Install the drain hose making a
"P" trap, secure the
condensate line drain
connection using the tube
clamp provided.
Fill the condensate line with
water.
The drain nipple is placed upside down in the unit to prevent it being damaged during shipping or the installation of the unit.

13
Airflow adjustment & balancing
Fantech's superior design and use of EBM Motors results in a steep fan curve that usually does not require balancing. Commissioning the system
after installation is recommended which include confirming the proper operation of the system and how it interacts with other components within the
home.
Airflow station (grid) method
B
Measure
here
Measure
here
12”
(300 mm)
12”
(300 mm)
1 For this ow measuring station, cut the
duct and place the ow measuring station
between each section of duct. Make sure
that the ow measuring station's air
direction arrow points in the direction of
the airow. Secure the ow measuring
station with duct tape.
2 Before taking the reading, make sure that
the magnehelic gauge is level and at 0.
Refer to the ow measuring station's
chart to determine your unit's airow
velocity.
3 Adjust the "Supply Air Out" damper until
you reach the desired velocity. Follow the
previous steps to adjust the "Exhaust Air
Out" damper, if needed.
• To avoid airow turbulence and
incorrect readings, the airow
velocity should be measured on
steel ducting a minimum of 12"
(300 mm) from the unit or elbow
and before any transition.

14
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
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 , Recircula-
tion 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 sys-
tem 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 HIGH
speed
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.
The wiring connectors
can be removed for
easier connection.
*Maintain polarity
between control
and HRV
(+ →+ ; - →-)
W
W
W
W
W
W
+T
-T
D
D
+T
-T

15
HIGH
SPEEDS
LOW
V55
JP5 JP3
V57
120V 90V
LOW
JP3JP5
HIGH
120V 90V
75V
55V
SPEEDS
Electrical connections
Observe polarity on all accessory controls where applicable.

16
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
Electrical connections (cont'd)
ELECTRICAL
CONNECTION TO
FURNACE
FOR A FURNACE
CONNECTION TO
A COOLING SYSTEM:
On some older thermostats, energizing
the R and G terminals at the furnace
has the effect of energizing 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
NEVER CONNECT A 120 VOLT AC CIRCUIT TO THE TERMINALS OF THE ACCESSORY CONTROL CONTACTS. ONLY USE
THE LOW VOLTAGE CLASS 2 CIRCUIT OF THE FURNACE BLOWER CONTROL.

17
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.
HRV out of balance Have contractor balance HRV 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.
HRV out of balance Have contractor balance HRV airows
Well sealed basement door is closed Open the door or install a grill on the door.
Failed damper system may be stuck in recirculation
mode
Check defrost damper. If damper is always blocking incoming fresh air, have
contractor verify damper system.
Persistent condensation
on window
Improper adjustment of dehumidistat control Reduce the desired level of humidity. Combine this step with use of continuous
exchange mode.
HRV out of balance Have contractor balance HRV
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 HRV (i.e. change unit control from LOW to MED speed)
HRV airow improperly balanced Have contractor balance HRV airows
Ducting has fallen down or been disconnected from HRV 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 HRV 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
HRV and/or Ducts frosting up HRV air ows are improperly balanced Have HVAC contractor balance the HRV airows
Malfunction of the HRV 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.
Green LED Light Codes on
Control Board
Constant Flash Everything is in good operations
Light is ON, and not Flashing Control Board is defective Replace Control Board
Light is OFF, and not Flashing No Power is being transmitted to the Control Board Make sure unit is plugged.
Transformer may need replacing.
Note: It is best to get the unit checked by a certied HVAC Contractor/Technician.

18
Limited Warranty
• The Heat recovery aluminum core
has a Lifetime Limited Warranty.
• The warranty is limited to 5 years on
parts and 7 years on fans from the
date of purchase, including parts
replaced during this time period. If
there is no proof of purchase
available, the date associated with
the serial number will be used for the
beginning of the warranty period.
• The fans found in all Fantech HRVs
require no lubrication, and are factory
balanced to prevent vibration and
promote silent operation.
• The limited warranty covers normal
use. It does not apply to any
defects, malfunctions or failures as
a result of improper installation,
abuse, mishandling, misapplication,
fortuitous occurrence or any other
circumstances outside Fantech’s
control.
• Inappropriate installation or
maintenance may result in the
cancellation of the warranty.
• Any unauthorized work will result in
the cancellation of the warranty.
• Fantech is not responsible for any
incidental or consequential
damages incurred in the use of the
ventilation system.
• Fantech is not responsible for
providing an authorized service
centre near the purchaser or in the
general area.
• Fantech reserves the right to supply
refurbished parts as replacements.
• Transportation, removal and
installation fees are the responsibility
of the purchaser.
• The purchaser is responsible to
adhering to all codes in effect in his
area.
* This warranty is the exclusive and only warranty
in effect relative to the ventilation system and
all other warranties either expressed or
implied are invalid.
HRV maintenance chart
Maintenance Required Recommended Frequency Date Maintenance Performed
Check and Clean Filters Every 3 months or if
dirty
Check Heat Recovery
Core
Every 6 months
Check Drain Pan and
Lines
Every 3 months
Vacuum the Inside of the
Unit
Annually
Clean and Un-block
Outside
Hoods
Annually
Clean and Inspect Duct
Work
Annually
General Servicing by a
Qualied Contractor
Annually
* Schedule may be altered to meet your own needs. More frequent servicing may be required depending on the
severity of your home's indoor and outdoor environments.
Contractor Telephone Number Date Serviced

VHR 70
Ventilateur récupérateur de chaleur
Manuel d'installation
No. d'article: 426592
Date de révision: 2017-02-28
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 se réserve le droit de modifier partiellement ou entièrement, en tout moment et sans préavis, les
caractéristiques, la conception, les composantes 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 techniques plus détaillées.
États-Unis
10048 Industrial Blvd., Lenexa, KS, 66215
Tél.: [phone] • Fax: [phone]
Canada
50 Kanalflakt Way, Bouctouche, NB, E4S 3M5
Tel.: [phone] • Fax: [phone]

20
VEUILLEZ LIRE LE MANUEL AVANT D’INSTALLER L’APPAREIL
À n d’installation résidentielle seulement
Avant de procéder à l’installation, examinez avec soin la façon dont le système fonctionnera s’il est relié à tout
autre appareil mécanique, notamment une fournaise à air pulsé ou un appareil de traitement d’air dont la pression
statique est plus élevée. Une fois l’installation terminée, la compatibilité des deux appareils doit être conrmée en
mesurant le débit d’air du ventilateur récupérateur de chaleur (VRC) au moyen de la procédure d’équilibrage du
présent manuel. Il importe de toujours évaluer l’interaction du VRC avec les appareils de chauffage à évacuation
(fournaise à gaz, fournaise à mazout, poêle à bois, etc.)
Les produits sont conçus et fabriqués pour fournir une performance able, mais ils ne sont pas garantis à 100%
sans défaut. Même les produis ont des pannes occasionnelles et cette possibilité devrait être reconnue par
l'utilisateur. Si ces produits sont utilisés dans un système de ventilation qui maintien des fonctions vitales où une
défaillance pourrait entraîner des pertes ou des blessures, l'utilisateur doit fournir une ventilation de secours
adéquate, une ventilation supplémentaire naturelle, un système d'alarme de défaillance ou d'accepter les risques
de pertes ou de blessures.
Votre système de ventilation doit être installé en conformité avec le code du bâtiment local qui est en vigueur, en
l’absence de telles exigences, il est recommandé de vérier auprès des autorités locales ayant juridiction dans
votre région avant d’installer ce produit.
Note Avertissement/
Note importante Information Information technique Conseil pratique