aldes InspirAIR FRESH EK120-HF Instruction manual

INSTALLATION, OPERATIONS & MAINTENANCE MANUAL
InspirAIR®FRESH
ENERGY RECOVERY VENTILATORS
FOR MODELS:
EK120-HF, EK120-HFX, EK120-HR, E120-HRX
Meets Standards:
C22.2 no 113 and UL 1812
Installing Contractor Telephone / Contact
Serial Number Installation Date
TO BE COMPLETED BY CONTRACTOR AFTER INSTALLATION
Model
Installer: Leave this manual for the homeowner
REGISTER YOUR PRODUCT ONLINE AT ALDESNA.COM
For EK120-HRX
ONLY

TABLE OF CONTENTS
I. INTRODUCTION 3
II. GENERAL ERV TERMINOLY AND FEATURES 3
Denitions 3
How Energy Recovery Ventilators Work 3
Ventilation with an ERV 4
III. PRECAUTIONS & GUIDELINES 4
Ducting Congurations 6
Locating the Air Exchanger 8
Ducting Materials 8
Connecting the Ducts 9
Vent Hood Locations 9
Locating the Exhausr Air Grilles or Registers 10
Locating the Supply Air Grilles or Diusers 11
Humidity Control 11
IV. INSTALLATION 12
What’s included 12
Mounting the Unit 12
Electrical Diagram 13
Conguration Oprtions 14
Unit Wiring 15
Wiring to the Power Source 17
Installing the Digital Multi-Function Control (P/N 611242-FC) 18
Digital Multi-Function Control Operation Modes 20
Installing the 20/40/60 Minute Tiomer (P/N 611228) 20
Installing the Speed Controller (P/N 611229) 20
ZRT VentZone System 21
V. MEASURING & BALANCING AIRFLOW 22
Measure and Balance 22
Door-Port Balancing 23
Balancing Airow and Adjusting Motor Speed 24
Sample Door-Port Balancing Example 25
VI. MAINTENANCE 26
General Maintenance 26
Replacement Filters 27
Technical Assistance 27
Trouble Shooting 28
VII. WARRANTY 30
What’s Included 30
How to File a Warranty Claim 30
VIII. APPENDICE 31
Appendice A. List of items (sold seperately) for the intallation of your ERV 31

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I. INTRODUCTION
Thank you for purchasing this ALDES ventilation product. To receive the full benet of
your investment, we recommend that you read and retain this operating manual for future
reference.
II. GENERAL ERV TERMINOLOGY AND FEATURES
Denitions
(Energy Recovery Ventilator): A ventilation device consisting of two fans and a energy re-
covery module that allows the transfer of heat and humidity between the supply and ex-
haust air resulting in a balanced supply of fresh air, without mixing the two airstreams.
How Energy Recovery Ventilators Work
In the heating season, ALDES Energy Recovery Ventilators (ERV) draw in fresh air from
outside. This air is distributed throughout the home by a dedicated-duct system or through
the forced-air heating/air conditioning system. At the same time, vents located in moisture-
and pollutant-producing rooms (e.g., kitchens, bathrooms, laundry rooms) exhaust an equal
amount of stale, humid air to the outside. Sometimes air is drawn directly from the return air
of a forced-air heating/air conditioning system.
As the two airstreams cross each other in the unit’s core, the fresh air is tempered with heat
recovered from the exhaust air. An ERV will also transfer moisture to the fresh air if this air is
drier than the exhaust air, improving comfort in overly dry homes.
Stale air from
inside
Fresh air to the
inside
Exhaust air to
outside
Fresh air from
outside
In the cooling season, the reverse situation occurs. Fresh outdoor air is cooled by the air-
conditioned exhaust air. If the outgoing air is drier than the fresh air, the ERV will transfer
moisture to the outgoing air. This process reduces the humidity load on the air conditioning
system, which would otherwise result in the continuous introduction of humid summer air
NOTE: It is important to understand that an ERV is not a dehumidier by itself, but it will
assist the air conditioner by removing much of the latent heat (water vapor) from the fresh
air entering the home.

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Ventilation with an ERV
Today’s modern homes require fresh outdoor air to maintain a healthy indoor air environment.
The amount of ventilation you require in your home will depend upon:
• Number of occupants and their activity levels
• How your home was built
• Your personal preferences for fresh air
The ALDES ERV introduces fresh air to your home while recovering energy from the air it
exhausts. Specically, an ERV that is properly installed, operated and maintained will:
• Exhaust stale, contaminated air
• Recover the majority of the energy from the exhausted stale air
• Use the recovered energy to pre-heat or pre-cool outside air drawn into the house
• Distribute the fresh air throughout the house
During seasons when your windows and doors are closed (winter and summer if air
conditioned), the ERV should be set to operate continuously on low speed with the option of
going to high speed as the need arises. For example, if you are entertaining and many people
are present, you should temporarily switch the unit to high speed.
You may wish to use an intermittent operational mode if your home is unoccupied for long
periods.
III. PRECAUTIONS & GUIDELINES
WARNING indicates the potential of risk of personal injury or death if not observed.
CAUTION identies an action that may damage the unit, its components, or related
equipment.
RECOMMENDATIONS and NOTES suggest operational modes, installation of vent hoods,
interior supply and exhaust duct layouts, use of advanced features of the equipment that
may result in improved economy and comfort.
Installation and operation of these units must be in accordance with applicable
local building and safety codes.
WARNING!
To avoid injury or damage to this unit, do not attempt to service any of the
internal electrical or mechanical components. Your energy recovery ventilator
should be installed and serviced by a qualied heating and electrical
contractor.

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CAUTION
Before installation, careful consideration must be given to how this system will
operate if connected to any other piece of mechanical equipment that operates
at a higher static, i.e., a forced-air furnace or air handler. After installation, the
compatibility of the two pieces of equipment must be conrmed by measuring
the airows of the ERV using the balancing procedure found in this manual.
NEVER install a ventilator in a situation where its normal operation, lack
of operation, or partial failure may result in the backdrafting or improper
functioning of vented combustion equipment.
WARNING
TO REDUCE THE RISK OF FIRE, ELECTRIC SHOCK, OR INJURY TO PERSON(S) OBSERVE
THE FOLLOWING:
1. Use this unit only in the manner intended by the manufacturer. If you have questions,
contact the manufacturer at the address or telephone number provided.
2. Before servicing or cleaning the unit, disconnect the power cord from the electrical
outlet.
3. This unit is not designed to provide combustion and/or dilution air for fuel-burning
appliances.
4. This unit is not designed to provide make-up air for other exhausting devices, such as
range exhaust hoods, clothes dryers, or other exhaust fans.
5. When cutting or drilling into wall or ceiling structures, do not damage electrical wiring
or other hidden utilities.
6. Do not use this unit with any speed controls, dehumidistats or timers other than those
specically indicated within this manual.
7. The unit must be equipped with a ground connection. The NEC terminal block provides
a terminal for connecting the ground wire to the unit. The unit’s ground wire must
therefore be connected to the building’s grounding system in accordance with the
building code. Do not use extension cords.
8. Do not install exhaust grilles in a cooking area (see“Locating the Exhaust Air Grilles or
Registers” on page 13). Do not connect directly to any appliances.
9. Do not use to exhaust hazardous or explosive materials and vapors.
10. When performing installation, servicing or cleaning the unit, it is recommended to wear
safety glasses and gloves.
11. When local regulations comprise more restrictive installation or certication
requirements, such requirements supersede those in these instructions.

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CAUTION
1. This unit is intended for residential use only, conforming to the requirements of the
International Residential, Building, and Mechanical Codes, NFPA 90B for the United
States and the National Building Code of Canada.
2. Turn the unit o during construction to avoid clogging the lters and loading the
blowers with construction dust.
3. Refer to the specication sheet for the specic model’s dimensions, electrical
requirements, drain connections, etc.
4. Ducting of stale air to the outdoors and fresh air from outdoors, must be terminated
outdoors, not attics, crawl spaces, or attached garage.
Ducting Congurations
The interior ducting system’s purpose is to remove stale air and circulate fresh air to all
habitable rooms. 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.
The amount of air (CFM) that an ERV will deliver is directly related to the total external static
pressure (ESP) of the system. Static pressure is a measure of resistance imposed on the blower
by a length of ductwork plus the number of ttings used in the ductwork.
The following pages outline 3 duct congurations, from most desirable to least desirable.
Note: These congurations are intended for typical residences. Applications such
as greenhouses, atriums, swimming pools, saunas, etc., have unique ventilation
requirements that should be addressed with an isolated ventilation system.
Note: The way your heat/energy-recovery ventilator is installed can make a signicant
dierence to the electrical energy you use. To minimize the electricity use of the heat/
energy-recovery ventilator, a stand-alone fully ducted installation is recommended.
If you choose a simplied installation that operates your furnace air handler for
room-to-room ventilation, an electrically ecient furnace that has an electronically
commutated (EC) variable speed blower motor will minimize your electrical energy
consumption and operating cost.
Fully Ducted System – Best Conguration
1. Fresh air to inside
2. Exhaust air from inside
3. Fresh air from outside
4. Exhaust to outside
5. Separation must comply with local
codes
Note: Port congurations are generic
and do not represent specic models
6”

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The fully ducted system has the highest ventilation eectiveness. It is especially suited for
homes without forced-air systems used for both heating and cooling. Dedicated exhaust
grilles draw stale air from service rooms. Dedicated supply registers provide fresh air to main
living areas and bedrooms. Grilles should be located high on a wall or in the ceiling. Grilles
that diuse the air are recommended. Special care should be taken in locating grilles in the
oor. Areas under baseboard heaters will help temper the air. See“Locating the Exhaust Air
Grilles or Registers”page 13 and “Locating the Air Grilles of Diusers” page 13 . Also refer
to the installation instructions included with these products (sold separately).
This system is not connected to an Air-Handling Unit (AHU) or furnace. This system is
normally balanced on high speed. If ALDES patented* Zone Register Terminals (ZRT®) are
used for exhaust or supply registers, balancing must be done at normal operating speed.
Consult the ZRT brochure fore more details on installing and ERV in conjuction with a ZRT
system. For constant air ow models (HRX and HFX) the use of the ZRT is not recommended.
Partially Ducted System – Conguration
1. Fresh air to inside
2. Exhaust air from inside
3. Fresh air from outside
4. Exhaust to outside
5. Separation must comply with local
codes
Note: Port congurations are generic
and do not represent specic models
In a partially ducted conguration, individual exhaust grilles in bathrooms, laundry rooms,
and kitchens draw stale air. Each location with a stale air duct could also have a timer that
will initiate high-speed ventilation. Fresh air is distributed by the Air-Handling Unit (AHU) of
a forced-air heating or air conditioning system. The connection to the forced-air system is
typically to the return ducting or plenum of the AHU. See section “Interlocking the ERV to
an Air-Handler/Furnace Blower” on page 18.
While this conguration is common in commercial installations, it is not always recommended
for residences due to the following:
1. In this case, the AHU must run continuously or be interlocked to operate with the ERV
to avoid loss of balanced supply and exhaust airows.
2. In multi-speed AHU’s, balancing must be conducted on the most frequently used
speed, but the ERV may not remain in balance at other speeds.
6”

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In this conguration, dedicated exhaust grilles remove stale air from bathrooms, laundry
rooms, and kitchens. Fresh air is supplied to a large-volume room, such as a great room,
family room, high stairway, etc. The forced-air system will draw the fresh air into the return
grilles of the AHU and distribute it throughout the house. The ERV and AHU may operate
independently with no impact on airow balance.
A thermostat with a ventilation feature is recommended to turn on the AHU periodically
to assure proper supply air distribution apart from heating/cooling cycles. This type of
timer avoids the energy cost of operating the blower fan in the AHU, and it also lessens the
concerns about draft in winter and re-evaporation from the AC coil in the summer.
3. In warm, humid seasons, continuous operation of the AHU causes evaporation from
the cooling coil, resulting in a loss of humidity control. Failure to operate the AHU with
the ERV may also result in condensation in the supply plenum and ducting.
4. Continuous operation of the AHU may cause drafts in the winter.
5. Backdraft or motorized dampers may be built into the ERV to prevent entry of outdoor
air during o cycles, but they should not be installed in the duct leading to the
outside.
Due to these reasons, it may be preferable to avoid a direct duct connection to the return of
the AHU and use an indirect approach instead.
1. Fresh air to inside
2. Exhaust air from inside
3. Fresh air from outside
4. Exhaust to outside
5. Separation must comply with local codes
Note: Port congurations are generic and do
not represent specic models
Indirectly Ducted System – Conguration
Locating the Air Exchanger
The device must be located in a place where the temperature is always above freezing.
Choose a location for the device where the ducts will be short with minimal use of
elbows. This ensures that the system functions optimally.
Ducting Materials
1. Where ducting passes through concealed spaces (walls, ceiling-oor assemblies), the
duct should be in metal to oer less resistance to airow and permit duct cleaning.
6”

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2. Where the ducts remain permanently accessible, 5 to 10 feet of insulated exible duct
should be used between the ERV and all interior supply and exhaust registers to reduce
fan noise passing the ducting to interior spaces.
Connecting the Ducts
For the air exchanger to run optimally, place the ducts so they are as straight as possible.
Ducts should be kept short and have as few bends or elbows as possible to maximize airow.
Forty-ve degree elbows are preferred to 90-degree elbows. Use“Y” tees rather than straight
tees whenever possible.
All ducts going through unheated areas must be insulated. The ducts between the exterior
vent hoods and the ERV must be insulated and covered with a vapor barrier. See the next
section “Vent Hood Locations”.
Flexible duct is recommended to provide vibration isolation between the unit and duct
system. Start by determining the required duct length to reach each respective collar, and
cut as required. If rigid duct is used, avoid attaching with screws to the duct collars, as they
may interfere with the damper operations at each duct collar.
The EK120 models are equipped with twist-in collars to simplify the process of connecting
exible duct to your ventilator. Remove each duct collar by twisting them out of the locking
tabs. Connect the ducts to the removed collars using duct tape and exible duct straps.
Reinstall collars, with duct attached, to their respective labeled ports on the ERV by lining up
locking tabs and twisting on in a clockwise direction.
*Note: for illustration purposes only. The device does
not represent a specic model.
Note: For fresh air intake, the plastic duct collar with
anti-return ap must be installed so that the ap is hori-
zontal. Use the picture on the left as a reference. The red
line indicates the horizontal position of the ap.
Vent Hood Locations
(Manufacturer’s recommendation only. Also consult Local Building Code Requirement.)
Wall hoods (sold separately) should be placed in easy acess location for cleaning purposes.
Note: Please refer to Installation Instructions packaged with wall hoods.
Fresh Air (Intake) Wall hoods:
• Should be located upstream (if there are prevailing winds) from the exhaust wall hood
• At least 6 feet (2 metres) from the exhaust wall hood
• At least 6 feet (2 metres) from dryer vents and furnace exhaust (medium or high-
eciency furnaces)
• At least 6 feet (2 metres) from driveways, oil ll pipes, gas meters or garbage
containers.
• At least 18 inches (457 mm) above the ground, or above the depth of expected
snow accumulation.
• At least 3 feet (1 metre) from the corner of the building.
• Do not locate in a garage, attic, or crawl space.

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Exhaust Air Wall hoods:
• At least 6 feet (2 metres) from the fresh air intake wall hood.
• At least 18 inches (457 mm) above the ground, or above the depth of expected
snow accumulation.
• At least 3 feet (1 metre) 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.
Dual Intake and exhaust hoods: Concentric-type or dual intake/exhaust hoods may be
used where authorized.
Note: Local codes may allow less or require greater distances between exhaust and
intake wall hoods.
INTAKE EXHAUST
6’ (2m)
recommended minimum
36” (1m)
recommended
minimum
36” (1m)
recommended
minimum
18” (460mm)
recommended minimum
18” (460mm)
recommended minimum
OUTSIDE CORNER INSIDE CORNER
Locating the Exhaust Air Grilles or Registers (in systems with dedicated
exhaust ducting)
The exchanger has at least one exhaust air intake register. Exhaust air registers should be
placed where the humidity level is high, such as bathrooms, laundry rooms, and kitchens.
However, do not install in areas of extreme humidity such as steam showers, jacuzzi rooms,
indoor pools and solariums. Kitchen exhaust grilles must never be connected to the range
hood. Do not install an exhaust grille ducted to the ERV in a cooking area, dened by the area
above or inside a 45-degree angle projected outwards from the cooking element closest to
the exhaust grille. See gure below.
Normally, the exhaust air intake register would be located on the rst oor between the
bathroom and the kitchen, or in the basement near the bathroom. Avoid placing it in the
same room as a combustion device, such as a replace or furnace. The vent should be
installed high on the wall or in the ceiling. If installed on the wall, it should be placed at least
12 inches (30 cm) from the ceiling.

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Adjustable grilles can be used to balance the ow rates. Field supplied balancing dampers
can be external to the unit to balance the amount of stale air being exhausted. These grilles
should not be adjusted after balancing the unit.
Locating the Supply Air Grilles or Diusers
The fresh air diusers should be installed in hallways, near the primary return for the
forced air system, in bedrooms and/or in common living areas. Diusers should be located
a reasonable distance from the exhaust registers to promote circulation of the fresh air
throughout the dwelling. The supply diusers should be installed high on the wall or in the
ceiling. If the diuser is located in a common area, it is recommended to place it on the
ceiling so that it can better mix with the air in the room before reaching occupants. This will
improve comfort in cold weather. If diusers are installed on the wall, place them at least 12
inches (30 cm) from the ceiling.
Adjustable grilles can be used to balance the ow rates. Field supplied balancing dampers
can be external to the unit to balance the amount of fresh air being supplied relative to the
other diusers. These grilles should not be adjusted after balancing the unit.
Humidity Control
Tight, well-insulated space may have high indoor humidity levels during the heating season.
High humidity will be apparent from visible condensation on windows. The amount of
window condensation will increase as outdoor temperatures drop. On summer nights, the
outside air is often cooler than the air inside your home.
Your ERV will reduce indoor humidity levels when outdoor air is drier than indoor air. This
usually occurs during the heating season when outdoor temperatures are less than 50°F
(10°C), as shown in the following table:

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RECOMMENDED RELATIVE HUMIDITY TO PREVENT INDOOR CONDENSATION*
OUTSIDE AIR TEMPERATURE RELATIVE HUMIDITY
0°C to 10°C (32°F to 50°F) 45% - 50%
-6°C to 0°C (21°F to 32°F) 40% - 45%
-12°C to -6°C (10°F to 21°F) 35% - 40%
-18°C to -12°C (0°F to 10°F) 25% - 30%
-24°C to -18°C (-11°F to 0°F) 20% - 25%
Under -24°C (-11°F) Under 20%
ASHRAE 62.2 standards recommend maintaining a relative humidity rate between 30% and
60%. The average person is comfortable between 30-50% relative humidity (RH).
ALDES oers several wall controls with a dehumidistat function. Please refer to the wall
control user guide for detailed information.
IV. INSTALLATION
What’s Included
Verify that all parts have been included with the shipment. If any parts are missing, notify
your distributor as soon as possible. Note: Quantity of parts may vary depending on model of
air exchanger (e.g., single or double drain)
• Heat or Energy Recovery Ventilator
• User manual
• Parts Bag:
• Rails (2)
• Hooks (4)
• Middle plate (1)
Other items used for standard installation can be bought seperately. Contact your local
distributor to order ALDES items. Refer to Appendice A to see the list of items.
Mounting the units
Mounting the units using a ceiling bracket
It is highly recommended to refer to the detailed installation instructions that are provided
with the ceiling bracket kit.
Assemble the ceiling bracket, place the antivibration grommets and ax to the ceiling with
appropriate fasteners. Next, attach the provided mounting brackets to the corners of the
unit. Lift the end of the unit with the hooked brackets to the ceiling bracket and attach, then
raise the other side of the unit until it snaps into place. Finally, use the two security screws to
x the unit to the ceiling bracket.

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Note: to ensure quiet operation of the ENERGY STAR-certied ERV system, each product
model must be installed using sound attenuation techniques appropriate to the installation.
Electric Diagram
Option is selected when jumper
connects both pins on the row.
Extra jumper (does not connect both
pins).
Options jumper block Programs jumper block
Note on installation: To facilitate assembly of the unit, we recommend dividing the instal-
lation into two stages. The rst is to install the unit without the core, which makes it easier
to handle when attaching it to the rails. Once the unit has been installed on the rails in ac-
cordance with the “Mounting the unit” section of this manual, the second step is to install
the recirculation core. To remove or install the core in the unit, assemble or disassemble the
retaining bar (9209-112), as shown in the following illustration.

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Conguration Options
In order to congure the dierent modes on your unit, you may need to move a jumper on
the unit’s printed circuit board. This can be done without any special tools following the
directions below.
Suggestion: it is easiest to do this prior to installation, on a table with the unit on its back.
1. Disconnect the unit power cable to avoid electric shock or damaging the PCB.
2. Remove the unit’s terminal block by rmly pulling it straight out.
3. Using a Phillips-head screwdriver, remove the three screws holding the electronic
control box in place.
4. Once the screws have been removed, slide the electronic control box upwards to gain
access to the PCB. Locate the jumper pins on the PCB. They are located just behind the
motor speed controllers, at the front of the unit.
5. In order to congure the dierent modes available for the unit, you will need to move
dierent jumpers in the Options jumper block. It is the block with jumpers pins rang-
ing from 1 through 7. Below are the congurations for the dierent options available.
6. 5a) Defrost modes
• By default, the ERV is congured for Normal Defrost, with no jumpers on pin
sets 5 and 6. Normal Defrost is optimized for most climate zones. The unit will
automatically protect the core from frost build up by periodically switching to
high speed recirculation or exhaust.
Remove the terminal by
pulling it towards you.
611242
611227
611229
611230
611242
611227
611229
611230
611242
611227
611229
611230
611242
611227
611229
611230

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• For extremely cold climates, you can choose the Extended Defrost option
which increases the time in which the unit stays in the defrost cycle. To activate the
Extended Defrost option, position a jumper on the conguration port 6 and make
sure it connects boths pins in the row.
• The Comfort Defrost option prevents the ERV from switching from low to
high speed and back during defrost cycles, so there will be no audible dierence
between exchange and defrost. To activate Comfort Defrost, position a jumper on the
conguration port 5 and make sure it connects boths pins in the row.
• Note that the Extended and Comfort Defrost settings can not be activated at
the same time. This means there should never be jumpers on both conguration
ports 5 and 6.
5b) Slave mode
• In slave mode, an external device (e.g. air handler) or switch will determine when
the ERV will operate.
• By default, the slave mode option is DISABLED.
• To activate slave mode, position a jumper on the conguration port 7 and make
sure it connects boths pins in the row.
6. Once confguration is complete, replace the circuit board cover and the terminal block
and proceed to wiring the unit to the controls.
Unit Wiring
A) Unit wiring to accessories
All units can be used with the following ALDES wall accessories:
611227: Electronic Humidistat with liquid crystal display
611229: Speed Control

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611230: Mode Control
611242-FC: Digital Multifunction Wall Control
These can all be used on their own or with a
timer (611228). To wire an accessory and/or a
timer, connect the ERV as illustrated on the right.
B) Unit wiring for Slave Mode
In slave mode, an external device or switch will dictate when the unit will operate. This is the
case for VentZone® Systems, use of third party thermostats with built in ERV controls, and
use of external third party switches that are used to enable/disable the unit. Installations
requiring a switch to enable or disable the unit via a wall switch will need to be placed into
slave mode.
To enable low speed exchange, a connection must be made between terminals 1 and 3 (see
illustration below). If this connection is open, the ERV will be put into standby mode. This
connection can be made using any 24V switch or dry contact controller, such as a smart
thermostat with integrated ventilator control or a programmable timer.
With this wiring, the unit can be operated at the
following settings:
- O
- Low Speed Exchange
- High Speed Exchange
- Low Speed Recirculation
- High Speed Recirculation
If low speed is insucient and high speed is required to satisfy the ventilation rate, connect a
jumper between terminals 3 and 4 in addition to the switched line between terminals 1 and
4 (see illustration below). This sets the ventilation speed to high.
Low and High speeds can be adjusted with FlexControl (refer to page 32).
611242
611227
611229
611230
611242
611227
611229
611230
Jumper
Terminal
Block
Switch
High Pressure Conguration
Low Pressure Conguration
Switch
Terminal
Block

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C) Interlocking the ERV to an Air-Handler/Furnace Blower
Installations sharing ductwork with air-handling units or furnaces operate most eectively
when those units are powered on to properly distribute the fresh air provided by the ventilator
throughout the home. The ERV has the ability to interlock with external equipment, such as
an air-handler or furnace blower, to activate or deactivate that equipment as necessary.
The unit’s terminal strip has two fan interlock options via terminals 6, 7, and 8 on the terminal
block. Terminal 6 is NORMALLY CLOSED, and terminal 8 is NORMALLY OPEN. Terminal 7 is the
ground for both 6 and 8.
For the ERV to operate only in conjunction with the Air-Handler/Furnace, do the following:
1. Connect the ERV as illustrated below. Refer to the AHU Owner’s Manual/Wiring
Diagram for instructions on connecting to the fan start relay.
Note: It is the same process as connecting the fan control on a thermostat.
2. Ensure the air-handler/furnace blower motor is operating whenever the ERV is
ventilating.
Note: Consideration must be given to competing airows when connecting the ERV in
conjunction with an Air-Handler/Furnace Blower system.
Interconnection to a forced-air
heating or cooling system (UTA)
Wiring to the Power Source
Once all the ducts are installed and the wires to the controllers are connected, connect the
ERV to a 120V power source according to the model type:
Models without power cord (model numbers ending in -N):
WARNING: Cordless models must be wired to the building mains by a licensed electrician
according to applicable electrical and building codes.
To wire the ERV:
1. Ensure that the circuit breaker is turned o during installation.
2. Locate the junction box on the ERV (see illustration below).
3. Remove the junction box cover with a Philips-head screwdriver. Retain the screws for
later when replacing and securing the junction box cover (Step 7).
Terminal Block
Start

Multi-Unit Residential ERV
18
4. Insert the electrical conduit into the 7/8” (22.3 mm) hole in the junction box cover, and
secure it with a clamp or washer and screw.
5. Pass the wire through the grommet.
6. Strip insulation 1/4” (6.4 mm) from the ends of the wires.
7. Connect the wires to the ERV terminal block
8. Replace the junction box cover over the box and secure it using the screws from Step 2.
9. Turn on the circuit breaker and conrm that the ERV powers up.
Please refer to the controller’s documentation for detailed mounting and operating
instructions. Note that the Automatic dehumidistat mode is intended to be used when the
outdoor air has less moisture content than the indoor air. Turn o the Automatic mode when
outdoor air is hot and humid.
Installing the Digital Multifunction Control (P/N
611242-FC)
The Digital Multifunction Control (P/N 611242-FC) can be used with
any type of ALDES Residential ERV. The controller should be installed
in the place where excess humidity is most likely to be detected, for
example near a bathroom, kitchen or in the basement. Ensure good
air circulation around the controller. Do not place it behind a door,
for example.
Electrical box location on all
Inspirair Fresh models.
CAUTION: Turn o power to avoid risk of malfunction.
To connect the Digital Multifunction Control to the ERV, follow these diagrams:
Note: Installation of a user-accessible control with your product model will improve comfort
and may signicantly reduce the product model’s energy use.

Multi-Unit Residential ERV
19
Set the ON/OFF switches to correspond to your ERV model, as listed in the following table:
Connect each wire to the terminal board on the back of the controller face plate according to the
connection chart shown on the mounting plate. Then connect the 4-conductor wire to the terminal
board on the ERV according to the respective colors. The control operates at 24V.
The following table shows which operating modes are available for the dierent ON/OFF settings:
2
ON OFF
1
2
ON OFF
1
With recirculation
Models: EK120-HR,
EK120-HRX
Without recirculation
Models: EK120-HF,
EK120-HFX

Multi-Unit Residential ERV
20
Installing the 20/40/60 Minute Timer (P/N 611228)
This controller provides the ventilation unit with high-speed
exterior exchange for the following durations:
• 20 minutes
• 40 minutes
• 60 minutes
A service box is recommended when installing the timer switch.
1. Run a 3-conductor low-voltage (24V) wire through the wall until it
reaches the ERV.
2. Connect each wire to the timer switch according to its respective color.
3. Connect the 3 wires to the ERV’s terminal block according to their colors.
Wires must be sized for 24V.
4. Screw the backside of the control panel to the wall. Use the mounting
screws to secure the top section into place.
Digital Multi-Fuction Control Operation Modes
Installing the Speed Control (P/N 611229)
This controller provides the ventilation unit with 4 modes of operation:
• Intermittent mode; successive cycles, low-speed 20-min exchange,
40-min stop mode or recirculation
• Low-speed exterior exchange mode
• High-speed exterior exchange mode
• Stop mode or recirculation (indicator lights are o )
1. Run a 4-conductor low-voltage (24V) electrical wire through the wall
until it reaches the ERV.
2. Connect each wire to the control’s terminal block according to its
respective color.