nuair ES Series Assembly Instructions

Rev. Oct. 10, 2010
P.O. Box 2758
Windsor, Nova Scotia, B0N 2T0
Phone: [phone] Fax: [phone]
www.nu-airventilation.com
Email: [email protected]
ES SERIES
O
OP PE ER RA AT TI IN NG G, , M MA AI IN NT TA AI IN NI IN NG G & & I IN NS ST TA AL LL LI IN NG G Y YO OU UR R H HE EA AT T R RE EC CO OV VE ER RY Y
V
VE EN NT TI IL LA AT TO OR R
FOR MODELS ES100 AND ES170
* LEAVE THIS DOCUMENT WITH THE HOMEOWNER
Specifications, dimensions and ratings may change without notice
as a result of ongoing product development and improvements.

Rev. Oct. 10, 2010
TABLE OF CONTENTS
1. PERFORMANCE RATINGS & PHYSICAL DATA ..................................................................................................... 3
2. HOW THE NU-AIR SYSTEM WORKS......................................................................................................................... 5
3. INSTALLATION............................................................................................................................................................. 5
3.1. Installer's Responsibilities...................................................................................................................5
3.2. Installation System Options ...............................................................................................................6
3.3. Ducting to The Outside........................................................................................................................9
3.4. Mounting & Noise Control................................................................................................................10
3.5. Ductwork ............................................................................................................................................10
3.6. Drain Connections .............................................................................................................................11
3.7. Balancing the System.........................................................................................................................11
4. CONTROLS................................................................................................................................................................... 13
4.1. Main Board Features: .......................................................................................................................13
4.2. ES-T1 ..................................................................................................................................................15
4.3. ES-M1 .................................................................................................................................................15
4.4. ES-M2 .................................................................................................................................................15
4.5. ES-M3 .................................................................................................................................................15
4.6. Standard Dehumidistat (Part # DSTAT-1)......................................................................................16
4.7. Windsor Control (Part # WIN-1) .....................................................................................................17
4.8 Windsor Timer (WIN-20) .................................................................................................................18
4.9 Spring Wound Timers.......................................................................................................................18
4.10 Remote On/Off Switching .................................................................................................................18
4.11 Furnace Interlock ..............................................................................................................................19
5. START-UP..................................................................................................................................................................... 19
6. OPERATING HINTS.................................................................................................................................................... 19
7. MAINTENANCE .......................................................................................................................................................... 20
7.1. Filters:.................................................................................................................................................20
7.2. Fans:....................................................................................................................................................20
7.3. Condensate Drain: .............................................................................................................................20
7.4. Core:....................................................................................................................................................20
7.5. Exterior Hoods:..................................................................................................................................20
7.6. Grills & Duct Work:..........................................................................................................................20
8. ANNUAL SERVICING: ............................................................................................................................................... 20
9. TROUBLE SHOOTING: .............................................................................................................................................. 21
10. ELECTRICAL SCHEMATICS .................................................................................................................................... 22
10.1. The ES Series Circuit Board.............................................................................................................22
10.2. Defrost, Recirculation and Furnace Interlock Jumpers.................................................................23

Rev. Oct. 10, 2010
10.3. ES Series Wiring Diagram ................................................................................................................24
10.4. ES Series Control Wiring..................................................................................................................25
10.5. DSTAT-1 Control Wiring .................................................................................................................26
10.6. WIN-1 Control Wiring ......................................................................................................................27
10.7. WIN-20 Control Wiring ....................................................................................................................28
10.8. Low Voltage Switch Wiring ..............................................................................................................29
11. WARRANTIES.............................................................................................................................................................. 30

Nu-Air Ventilation Systems Inc. - HRV Operating &Installation Manual
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1. PERFORMANCE RATINGS & PHYSICAL DATA
VENTILATION PERFORMANCE ENERGY PERFORMANCE
EXT.
STATIC NET SUPPLY GROSS AIR FLOW SUPPLY NET POWER SENSIBLE APPARENT
PRESSURE AIR FLOW SUPPLY EXHAUST TEMP. AIR FLOW CONSUMED RECOVERY SENSIBLE
in wg (Pa) cfm (l/s) cfm (l/s) cfm (l/s) ºF (ºC) cfm (l/s) Watts EFFICIENCY EFFECTIVENESS
0.1 (25) 185 (87) 188 (88) 193 (91) +32 (0) 62 (29) 46 65 73
0.2 (50) 176 (83) 178 (84) 180 (85) +32 (0) 86 (41) 62 63 70
0.3 (75) 160 (75) 163 (78) 166 (78) +32 (0) 115 (54) 76 61 68
0.4 (100) 148 (70) 150 (71) 152 (71)
0.5 (125) 137 (64) 139 (67) 141 (67) 13 (-25) 63 (30) 53 59 78
0.6 (150) 124 (58) 126 (61) 130 (61)
0.7 (175) 110 (52) 111 (52) 118 (55)
Model: ES170
This product earned the ENERGY STAR® by meeting strict energy efficiency guidelines set by Natural
Resources Canada and the US EPA. It meets ENERGY STAR requirements only when used in Canada.

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VENTILATION PERFORMANCE ENERGY PERFORMANCE
EXT.
STATIC NET SUPPLY GROSS AIR FLOW SUPPLY NET POWER SENSIBLE APPARENT
PRESSURE AIR FLOW SUPPLY EXHAUST TEMP. AIR FLOW CONSUMED RECOVERY SENSIBLE
in wg (Pa) cfm (l/s) cfm (l/s) cfm (l/s) ºF (ºC) cfm (l/s) Watts EFFICIENCY EFFECTIVENESS
0.1 (25) 147 (69) 150 (71) 172 (81) +32 (0) 55 (26) 48 70 79
0.2 (50) 131 (61) 134 (63) 153 (72) +32 (0) 66 (31) 52 68 76
0.3 (75) 118 (56) 121 (57) 135 (64) +32 (0) 40 (86) 72 65 73
0.4 (100) 104 (49) 107 (50) 123 (58)
0.5 (125) 91 (43) 93 (44) 111 (52) 13 (-25) 64 (30) 58 56 80
0.6 (150) 76 (36) 78 (37) 92 (43)
0.7 (175) 64 (30) 66 (31) 79 (37)
0.8 (200) 52 (24) 53 (25) 64 (30)
Model: ES100
This product earned the ENERGY STAR® by meeting strict energy efficiency guidelines set by Natural
Resources Canada and the US EPA. It meets ENERGY STAR requirements only when used in Canada.

Nu-Air Ventilation Systems Inc. - HRV Operating &Installation Manual
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2. HOW THE NU-AIR SYSTEM WORKS
A. Powerful, centrifugal
blowers bring fresh air into
your home while an equal
amount of stale, humid air is
exhausted to the outside.
This is NU-AIR’s balanced
central ventilation system.
B. Incoming fresh air is filtered
before flowing through the
heat exchange core.
C. Stale, humid air flows
through the cross-flow heat
exchanger and transfers the
heat to the incoming fresh
air.
D. Warm fresh air is distributed to each room of the house through an independent ductwork system.
3. INSTALLATION
3.1. Installer's Responsibilities
Installers are responsible for the performance of the ventilation system and for ensuring that all codes
and standards are met.
Do not mount the fresh air supply near a source of contaminated air such as automotive exhaust, gas
or propane exhaust or oil tanks.
Do not hook a dryer exhaust to an HRV.
Combustion appliances such as furnaces and hot water heaters must not draw combustion air directly
from an HRV.
Do not connect a range hood to any part of this system.
Do not install in attics or other unconditioned spaces (min. 16º C).
Do not install in enclosed garages.
Try to maintain straight duct runs as much as possible, using as few joint fittings as possible.
Keep use of flexible ducting to a minimum.
Be sure to observe local codes regarding running and insulating ducts in unconditioned spaces.
Poorly insulated ducts run in unconditioned spaces will hamper the efficiency of the HRV.

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3.2. Installation System Options
Before installing your HRV, please read these
instructions for correct installation. The Nu-Air HRV
is a self-contained system that is ready to be installed.
There are three commonly used and approved
methods of installation.
3.2.1. The Fully Ducted System
This system uses an independent duct system for
supply and exhaust air. The HRV is controlled
independently of all other equipment.
The best results are achieved when:
•Each room of the space is serviced with a vent
mounted in the ceiling or high on an interior wall (within 12" of the ceiling).
•Vents are located deep within a room, where they will not short circuit or create an
uncomfortable draft.
Areas typically serviced by Exhaust Air: Laundry Rooms, Kitchens, Bathrooms, other wet rooms.
Note. Kitchen exhaust grills should be equipped with a grease filter and must be located
at least 3 ft. horizontally in all directions from the surface of the range extended to the
ceiling.
Areas typically serviced by Fresh Air: Bedrooms, Living Rooms, Dining Areas, and Recreation Areas.
3.2.2. The Extended Exhaust System
This system uses the HRV in conjunction with a
forced air furnace distribution system. In this
system the HRV supply air to the house is
introduced into the return duct of the forced air
furnace. Separate, additional ductwork is used to
transfer stale air from the wet rooms to the HRV.
3.2.2.1. Extended System, Continuous Ventilation
The furnace fan may not need to run continuously with this system. Check local code requirements. For
improved supply air distribution during continuous ventilation mode, the furnace may be interlocked to
the HRV. See Section 3.9
3.2.2.2. Extended System, Intermittent Ventilation
If the HRV is operated intermittently, the furnace fan should be interlocked with the HRV for good
distribution of supply air during high-speed ventilation conditions.

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3.2.3 The Simplified System
This system uses the furnace's return
duct for both supply air distribution
and exhaust air collection. The exhaust
air connection must be a minimum of
40 inches upstream of the supply air
connection to avoid short-circuiting of
the fresh air.
3.2.3.1. Simplified System - Continuous Ventilation & Intermittent Operation
For proper supply air distribution with this system, and to prevent short circuiting in the return air duct,
the furnace fan must run during ventilation mode. Interlock the furnace and HRV in accordance with
Section 3.9.
NOTES:
1) When selecting an installation option, consideration should be given to the increased electrical
consumption of the furnace fan. The way that your Heat/Energy-recovery ventilator is installed may
make a significant difference to the electrical energy that you will use. To minimize the electricity use of
the Heat/Energy-recovery ventilator, a stand-alone fully ducted installation is recommended. If you
choose a simplified installation that operates your furnace air handler for room-to-room ventilation, an
electrically efficient furnace that has an electronically commutated (EC) variable speed blower motor
will minimize your electrical energy consumption and operating cost.
2) In cases where the HRV is coupled with a central air handling system, the HRV fresh air supply duct
to the return air plenum shall be connected at a sufficient distance upstream of the plenum connection to
the furnace. This allows proper mixing and ensures appropriate air temperature at the furnace heat
exchanger in cold weather. For fuel-fired mid and high efficiency furnaces a minimum temperature of
15.5º C (60º F) is recommended at the heat exchanger. (Check the furnace manufacturer’s
specifications).
3) To ensure quiet operation of ENERGY STAR qualified HRV/ERVs, each product should be installed
using sound attenuation techniques appropriate for the installation.
4) Installation of a user-accessible control with your product will improve comfort and may significantly
reduce the product’s energy use.

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Installation Supplies, Standard Issue Items:
The HRV comes equipped with:
Filters
Anti-Vibration Straps
Heat Recovery Core
Drain Hose Assembly
Balancing dampers are NOT REQUIRED. ES Series
HRVs from Nu-Air are equipped with a system which
allows the installer to adjust each motor in both high and
low speed.
Connections for timers, remote controls, furnace
interlock. A 4-wire and a 10-wire removable wiring block
are provided with the unit. To use these, gently remove the block from the HRV, fit the wire into
place and secure it in its trap, using a fin-tipped flat-headed screwdriver.
3.2.4. Control Options (sold separately)
The ES Series offers a wide range of control options to suit any lifestyle or preferred usage. The ES
Series line of digital touch-pad controls come with wall plate and all fasteners used to fix them into a
standard residential wall box.
ES Series Digital Controls
ES-T1: 20, 40, 60 minute timer
ES-M1: Off, Standby, Low, High
ES-M2: Off, Standby, Low, 20
min. Low/40 min. Standby
ES-M3: Off, Standby, Low, 20
min. Low/40 min. Recirculation
ES Series controls can be used in any combination and in virtually any number, and can be wired in
series or in parallel. The user may toggle through and select any function, even if this interrupts a
current mode or cycle.
Windsor Series Controls
Windsor standard mechanical dehumidistat (DSTAT-1)
Windsor mechanical control (WIN-1)
Windsor 20 minute timers—up to 6 each system (WIN-20)
Mix and Match Controls
Because the ES Series circuit board is equipped with separate, removable terminal blocks to
accommodate both ES Series and Windsor Series controls, both types of controls may be used in the
same installation. Details for combining ES and Windsor Series controls are covered in Section 4 of this
document.

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3.3. Ducting to The Outside
Between the weather hoods and the HRV you must use fully insulated ducting with an integrated
vapour barrier. Insulated ducting with an integrated vapour barrier must also be used on all runs
passing through unheated areas. This will help avoid condensation problems and energy losses.
The minimum RSI value of insulation should equal that of the local building codes.
3.3.1. Weather Hood Installation
1. Insulated flex duct slides over the
galvanized sleeve of the weather hood.
2. Use sheathing tape (red) to join the inner
duct to the hood's sleeve.
3. Tape the vapour barrier to back of the hood
without compressing the insulation. Caulk
or foam seal around the collars and hoods to
eliminate air and water leaks.
4. Locate the hoods for easy access to the bird
screen for cleaning purposes.
5. Be sure to use exterior sealant along the top
and side edges of the hoods, tooling the
sealant to ensure a good seal.
Make the insulated duct that connects the weather hoods to the HRV as short as possible to minimize
airflow restrictions. Avoid sharp bends and stretch out the inner lining of the flex duct as much as
possible to reduce static pressure and maximize airflow. For runs over 12’, increasing flex diameter 1”
to next size up will reduce pressure drop in the duct.
3.3.1.1. Locating the Weather Hoods
There should be a minimum of 6’ (feet) of separation between the fresh air and exhaust hoods. Supply
hoods should be a minimum of 18” (inches) above the ground level. Exhaust hoods should be at least 4
“(inches) above the ground level. Holes through the wall should be 1” larger than the collar on the
hood. Fresh air hoods must be 3’ away from any other appliance exhaust vent or furnace vent.
In addition ASHRAE Standard 62-99 recommends the following. Ventilation systems should be
designed to prevent the reintroduction of exhaust contaminants, condensation or freeze-ups and growth
of microorganisms. Make-up air inlets and exhaust air outlets shall be located to avoid contamination of
the makeup air. Contaminants from sources such as cooling towers, sanitary vents, vehicular exhaust,
and street traffic should be avoided.

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3.4.Mounting & Noise Control
For maximum efficiency, the HRV should be installed in a heated
area. The HRV is designed to be hung from the ceiling by way of the
anti-vibration straps supplied. Avoid hanging the HRV directly below
a bedroom or other quiet area.
Connecting To Other Equipment - Residential Applications
Interconnection with a forced air furnace duct system is permissible (see Section 3.2.2); however, your
Nu-Air HRV is not intended to be connected to any other equipment or appliances.
Flexible ducting may be desired in some installations for
noise abatement. To ensure effective air flow, use only as
much flexible ducting as necessary and keep it taut.
3.5. Ductwork
Duct runs should be straight with a minimum of bends
and elbows. Joints should be tight fitting and sealed with
duct tape or duct sealer.
RECOMMENDATION: Use galvanized duct whenever
possible. Although flexible duct can be used, its use
should be restricted to areas indicated (outside hoods
and unheated spaces).
Ducting must be supported according to the
manufacturers specified hanger system and
intervals.
Be sure to seal all pipe joints with foil tape or a
duct sealant.
When possible, form elbow joints so that they are
as straight as possible.
RECOMMENDATION: An engineer or other qualified
person should design the duct system.

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3.6. Drain Connections
Access to a drain or sump is required to handle the HRV condensate. Care should be taken to run the
condensate tube where it cannot freeze.
For best results, Nu-Air recommends the following steps be followed when installing drain kits on residential
HRV's.
1. Apply the rubber O-ring supplied to the flange of each drain spout (A)
2. Insert the drain spouts through the holes in the drain pan (B)
3. Use the speed nut to tightly secure the drain spout
4. Cut two lengths of drain hose (E) long enough to avoid kinking
5. Attach the hose to the drain spout by sliding it over the spout until it is tight to the bottom of the speed nut.
Repeat for the other side
6. Secure the hose to the spout with the plastic tie wraps (D)
7. Install the Tee (F) in either of the two ways shown in the drawings below
8. Attach the free end of the hose to the left fitting. Repeat for the other side
9. Use the remaining hose to form a "P" trap and terminate at the top of the tee
10. Pour approximately one cup of water into the drain assembly to form an air seal. This prevents gasses
from being drawn into the HRV
3.7. Balancing the System
See illustration on following page.
Balanced air flow between the supply and exhaust air streams is essential to the performance of an HRV
or ERV. With the ES Series, changing motor speeds or balancing is quick and simple with two buttons
recessed slightly into the unit’s cabinet. NO BALANCING DAMPERS ARE REQUIRED.
To balance the system or adjust motor speeds, use the following procedure:
1. Use a jumper wire or remote control to put the unit into high speed.
2. Press and hold either the FRESH air or EXHAUST air pushbuttons (not both) for 3 Seconds.
When you release the pushbutton, this will place the unit in BALANCING MODE.

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3. Now press the corresponding pushbutton to adjust the fresh air fan or the exhaust fan, thereby
changing the air flow. Each press will reduce speed by 1% until the default minimum is reached,
at which point speed will go back to its high speed. During the balancing procedure, you can
freely switch between adjusting the speed of the fresh air motor or exhaust air motor.
4. To exit balancing/speed adjust mode, stop pressing buttons for 10 seconds. This will place the
unit back in operating mode with the new speeds saved.
ES170 air flow adjustment
Low-Speed Adjustment/Balancing. If
desired, follow the same procedure to adjust
low speed, but use a jumper wire or remote
control to put the unit into low speed to
make low speed adjustments.
The equipment we recommend for balancing your system is easy to use, reliable and some of the most
cost efficient flow balancing, measuring systems available.
Once the HRV system is installed and the vapour barrier is completed, ensure the
following:
Close all windows, doors and fireplace dampers
Turn off any exhaust systems such as dryers, range hoods, bath fans and central
vacuums.
With multiple-speed forced air furnaces in Extended or Simplified systems, the
furnace should operate at continuous low speed.
To balance the HRV, you will need a device to measure air flow. It is recommended to
use either a magnehelic gauge or an air meter, both of which are available from Nu-Air.
Depending on the device you are using, follow one of the two procedures below:
Magnehelic Gauge:
1. Disengage one end of the exhaust flexible duct connector in the main duct before any
branch ducts and push the duct back into itself. Insert the flow grid and tape the joint
between the flow grid and ductwork.
2. Set the HRV on high speed. Mount the magnehelic gauge level and plumb. Join the
hoses from the flow grid to the magnehelic gauge. The needle of the magnehelic
gauge should read positively. Switch hose connections if the needle falls below zero.

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3. Ensure again that the balancing dampers are fully open. Record reading from gauge. Repeat the
procedure for the supply duct.
4. Go back to the duct with the higher reading and adjust the balancing damper
until the supply air is equal to the exhaust air reading.
Air meter:
1. Drill a ¼” hole in both the supply and exhaust ducts on the warm-side of the
machine at least 12” away from the HRV and any elbows, tees, etc.
2. Set the HRV on high speed and ensure once again that both balancing
dampers are set in the fully open position with a set-screw.
3. Take a pressure reading in each duct and record the results.
4. Go back to the duct having the higher reading, and damper the airflow down
until the pressure reads to within 10% of the other air flow.
5. Use tape to reseal the holes.
6. To convert pressure readings to airflow (cfm or L/s) refer to the instructions
and table included with the air meter.
For residential applications you should have a minimum ventilation capacity of 10
cfm (5 L/s) per room. The chart that accompanies the flow grid calibrates pressure
readings to airflow.
Refer to ASHRAE Standard 62 for acceptable ventilation rates in commercial buildings.
Calculating TVC (Total ventilation Capacity) for Residential Applications:
•20 cfm for the master bedroom
•20 cfm for an unfinished basement
•10 cfm for each other room in the house
Add these together to arrive at your TVC.
This method is called the “Room Count Method” and is part of CSA F326 (Residential Mechanical
Ventilation Systems). 0.3 air change per hour is no longer used.
Air meter available from Nu-Air wholesalers. (Part #100460)
Balance the HRV in less than five minutes.
4. CONTROLS
Your machine is equipped for remote controls. Options include humidity sensing, off-on control,
intermittent and continuous modes, recirculation as well as high speed control from the dehumidistat or
timer(s). You can also interlock the furnace blower to the HRV. Various means of controlling the
system are described below.
4.1. Main Board Features:
•Powerful transformer – an almost unlimited number of ES Series controls can be connected in
either series or parallel. Up to six (6) WIN-20 Timers can be connected in parallel.
•Self-resetting fuse to protect the board against mis-wiring.

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•Variable low and high speed control – each motor and both speeds may be adjusted individually
to ensure optimal ventilation rate, with minimal energy usage.
•Proportional defrost which will adjust defrost times and frequency according to outdoor
temperature.
•Selectable Furnace Interlock
•Optional jumper setting for 220V/50Hz geographic areas.
•Optional jumper settings for various defrost and recirculation profiles.
The following sections outline some of these features and explain the board in greater detail. In most
applications, the factory settings for speed control, defrost, electrical service and fan/motor type will
never need to be changed. A qualified technician must do any service work done within the electrical
panel of the HRV.
Variable low- and high-speed motor control:
As discussed and illustrated in Section 3, speed adjustment of each motor in both low and high speed is
possible using the FRESH and EXHAUST air pushbutton switches, located on the side of the unit. Each
push of the adjustment switch decreases the corresponding motor speed by increments of 1%.
Self-resetting fuse:
Field mis-wiring of controls, timers or dehumidistats may cause the fuse to trip. If this happens, remove
the control wires and allow the fuse to reset. This may take a few minutes. Check your manual for
proper wiring connections.
Defrost Cycles:
The versatile ES Series main board is equipped with an array of jumpers which enable its use in a wide
range of machine types and allow for field modification if desired. Unless you request otherwise, your
ES Series model will arrive with optimal factory settings. For a typical ES Series model, the defrost
mechanism is described below.
5th Port, Recirculation Defrost.
On such models (e.g. ES170), a temperature sensor is located in the fresh air stream before the core.
When the outdoor air temperature is measured below -5º C, a timed defrost cycle is initiated which will
vary in both frequency and duration at -15º C, -25º C and -40º C. For example, at -25º C, the ES170 will
run normally for 36 minutes and then shut off the exhaust air fan for 4 minutes, meanwhile closing a
damper to incoming outside air. Closure of the damper allows the ES 170 to then draw air from a neutral
space through its (top) 5th port and circulate this warm indoor air (not from exhausted areas) through the
heat recovery core to defrost it. Such a timed cycles repeat until the temperature of the outdoor air is
measured to be above - 5º C. During the brief recirculation portion of the defrost cycle, commands from
all remote controls will not activate, but will start after the recirculation cycle.
Note: When the machine is left in Standby, the damper automatically closes off the fresh air port to
prevent unwanted drafts while the machine is not in operation.
Selectable Furnace Interlock:
The Installer may choose between interlock whenever the HRV/ERV is on or only when the HRV/ERV
is operating in high speed (See illustration Section 10.2).

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4.2. ES-T1
This timer is used to make the unit operate in high speed for 20, 40 or 60 minutes and is typically
installed in bathrooms, kitchens and workspaces. You may toggle between functions or even cancel a
high speed run by tapping the touch pad. The ES-T1 will initiate timed high speed ventilation when the
unit is in Standby mode from another control or a jumper wire installed on the HRV control board. Use
4-conductor wire and connect to the 4-wire terminal block (See illustration Section 10.4).
4.3. ES-M1
This basic control allows you to select from standby mode, during which another control may initiate
operation, full-time low speed, or full-time high speed. The ES-M1 is ideal for installations where basic
ventilation functions are required or desired, especially in buildings with intermittent occupation. Use 4-
conductor wire and connect to the 4-wire terminal block (See illustration Section 10.4).
Functions:
1. No LED: HRV/ERV is OFF
2. Stby: Unit is in standby, ready for a command
3. Lo: Unit operates in low speed continuously
4. Hi: Unit operates in high speed continuously
4.4. ES-M2
While featuring the convenience of full-time standby and full-time low speed modes, the ES-M2 offers
the additional ability to ventilate in low speed for 20 minutes and then switch to standby for 40 minutes.
This control is perfect to use when you leave home and require just a little bit of ventilation to make
your home fresh when you return. Use 4-conductor wire and connect to the 4-wire terminal block. (See
illustration Section 10.4)
Functions:
1. No LED: HRV/ERV is OFF
2. Stby: Unit is in standby, ready for a command
3. Lo: Unit operates in low speed continuously
4. 20 Lo/40 Stby: Unit cycles between 20 minutes continuous low and 40 minutes standby.
4.5. ES-M3
Because ES Series units are equipped with a recirculation system that will not recycle bathroom air, the
ES-M3 control is just right for people who have secondary heating and cooling equipment, such as wood
stoves or room air conditioners. The re-circulation function of the ES-M3 enables you to re-circulate air
for 40 minutes of every hour from a heated or cooled space within your home, helping to alleviate the
problem of super-heated or super-cooled rooms. Use 4-conductor wire and connect to the 4-wire
terminal block (See illustration Section 10.4).
Functions:
1. No LED: HRV/ERV is OFF
2. Stby: Unit is in standby, ready for a command
3. Lo: Unit operates in low speed continuously
4. 20 Lo/40 Stby: Unit cycles between 20 minutes continuous low and 40 minutes recirculation.

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ES Series Controls: Operation Notes
Each ES Series control is equipped with a touch pad and 3 LED’s. The touch pad is used to select mode
of operation or turn the appliance off. The LED’s indicate which mode of operation the HRV/ERV is
operating in.
ES Series controls follow “master-slave” logic in that the most
recent one used controls the HRV/ERV. For example, if the M1
control is currently on Hi and you use an M2 control to select Lo
(or any other mode), the M2 control will assume command of the
HRV/ERV. You will notice that the LED on both controls will
now flash Lo. When a “feature” mode is selected (i.e. Hi or 20 Lo/
40 Stby or 20 Lo/ 40 Recirc.), all other mode controls will switch
to standby.
4.6. Standard Dehumidistat (Part # DSTAT-1)
With this basic control the system is designed to operate on a low speed for continuous ventilation with
intermittent high speed for moisture or air quality control. The dehumidistat will switch the HRV to high
speed when the relative humidity of the air around it exceeds its set point. When the indoor humidity
falls below the set point, the machine drops out of high speed. The standard dehumidistat can be
complemented with a Win-20 timer, or by installing a jumper wire between “R1” or “R2” and
“Standby” on the HRV control board, with the ES-T1 timer control.
Wiring: Use 2-conductor wire and connect to the 10-wire terminal block.
1. Hi + R1 or R2
2. Jumper R1 or R2 + SB (for continuous low speed, Jumper R1 or R2 + Lo).
(See illustration Section 10.5)
Enhance Function by Combining ES Series Mode Controls—Operation Notes
1. When combining the Standard Dehumidistat (DSTAT-1) with ES Series Mode controls, the DSTAT-
1 will have command priority upon start-up. At the first instance where an ES Series Mode control is
used to turn off the system, then an ES Mode control will be required to turn the system back on. It
would therefore be most convenient when combining a DSTAT-1 with ES Series Mode controls
(besides the T1 timer), to leave the ES Series controls in the STANDBY position. This will enable
intermittent ventilation on humidity calls an prevent possible cold drafts blowing in from outside.
2. When high speed is initiated from any mechanical switch during the operation of an ES Series Mode
control, the Mode control will restart operation after the mechanical switch high-speed demand has been
met or turned off.
Selecting operation with ES Controls
is easy: Just tap the touch-pad!

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4.7. Windsor Control (Part # WIN-1)
The Windsor Dehumidistat Control provides the same humidity control as the Standard Dehumidistat,
with the added control of a 3-position switch from which the operator can select three operating modes.
1. OFF - disables all functions.
2. STANDBY - HRV is on standby (intermittent). High speed ventilation on demand from the
dehumidistat, or remote timers. i.e. Auto-Off
3. CONTINUOUS - continuous low speed ventilation. HRV cycles to high speed on demand
from the dehumidistat or timers.
Also, the Windsor Control has a two position switch from which you can choose:
Constant - locks the motors in High speed
Standard – normal operating mode enables functions 2 and 3 above.
Wiring: Use 4-conductor wire and connect to the 10-wire terminal block (See illustration Section 10.5).
1. Red-R1 or R2
2. Green-SB
3. Black- Hi
4. Yellow- Lo.
While it offers several convenient features and operating modes, the Windsor Control can be combined
with ES Series controls to further customize system functions.
Enhance Function by Combining ES Series Mode Controls—Operation Notes
1. When combined with ES Series Mode controls, the Windsor Control (WIN-1) should be set in the
STANDBY position. As with the DSTAT-1, the Windsor Control will have command priority upon
start-up. At the first instance where an ES Series Mode control is used to turn off the system, then an ES
Mode control will be required to turn the system back on. It would then be most convenient, when
combining the WIN-1 with ES Mode controls, to keep the Mode controls in STANDBY as well to
enable intermittent high speed ventilation with humidity calls and prevent cold drafts blowing in from
outside.
2. During operation of an ES Mode control, the WIN-1 will take the Mode control out of command of
the system if the WIN-1 CONTINUOUS switch is engaged. Here all engaged ES Mode controls will
switch to “low” to match the command of the WIN-1 CONTINUOUS switch. ES Mode control will
resume after the WIN-1 CONTINUOUS switch is disengaged. If you would like to over-ride WIN-1
CONTINUOUS command, simply tap an ES Mode control in quick succession to toggle it back to the
OFF position, then chose the mode of operation that you would like.
3. The CONSTANT (high speed) feature of the WIN-1 control will over-ride commands from ES Mode
controls. ES-M2 and ES-M3 controls operating in their standby or recirculation mode, respectively, will
re-start their 20/40 cycle once the CONSTANT switch is turned off. If you would like to change the
operation mode on an ES Mode control during CONSTANT operation, you may do so and it will
commence after the CONSTANT function is turned off.

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Rev October 10, 2010 - 18 -
4.8 Windsor Timer (WIN-20)
Install in bathrooms, kitchens, workstations or other locations where high-speed ventilation control is
needed. The machine will run at high speed for twenty (20) minutes and then return to its previous
operating condition. Up to six (6) timers can be connected in parallel.
Wiring: Use 3-conductor wire and connect to the 10-wire terminal block. Match terminals on back of
WIN-20 switch to terminals on HRV (See illustration Section 10.6):
1. Power-R1 or R2
2. Timer Switch-TS
3. Timer LED- TL.
4.9 Spring Wound Timers
Wiring: Use 2-conductor wire and connect to the 10-wire terminal block.
1. Hi + R1 or R2.
2. Jumper R1 or R2 + SB (if timer is the only remote control used)
For continuous low speed operation:
1. Jumper R1 or R2 + SB.
2. Jumper Lo + R1 or R2.
4.10 Remote On/Off Switching
Basic RNC type control can be achieved using a standard, DEDICATED light switch:
(See illustration Section 10.7)
Wiring: Use 2-conductor wire and connect to the 10-wire terminal block.
1. Hi + R1 or R2.
2. Jumper R1 or R2 + SB.
Add low speed: Jumper Lo + R1 or R2

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4.11 Furnace Interlock
For simplified duct systems, it is recommended that the HRV be interlocked with the furnace blower
such that the furnace fan runs when the HRV is on to distribute supply air throughout the space.
Depending on local Codes, you may choose to interlock whenever the HRV/ERV is operating at any
speed, or just high speed (see illustration Section 10.2). To prevent unintended operation of the air
conditioning system (some thermostats connect Y and G internally), the G line must be isolated. See
figure below.
Connect to the 10-terminal block, I1, I2 and C.
5. START-UP
•Ensure the controls are connected in accordance with Section 3.
•For electrical hook-up, plug into a 120 volt receptacle.
•Ensure that the machine is piped to an adequate drainage source, i.e. through the drain hose
supplied.
6. OPERATING HINTS
When a dehumidistat is used, set it at the desired level. Look for signs of excessive humidity or
dryness. Let your windows be your guide. As outdoor temperatures decrease – the comfortable humidity
level also decreases.
Winter Operation – 40% - 50% is recommended. Lower settings may be necessary in colder zones to
keep windows free of condensation.
Spring/Fall Operation- 50% - 60% is recommended
Summer Operation – On extremely humid days it is best not to run the HRV during the day. At night
turn the machine on high speed using the dehumidistat. This will help keep your home cool and
your basement fresh. In the morning, turn the machine off again. The normal summer setting is 55%
- 75%. Alternatively plug the HRV into an electrical timer set to switch on/off at desired intervals.