Imperial XDH 7.15 HRV User manual

INSTALLATION GUIDE
Product of Imperial Air Technologies
Imperial Air Technologies Inc. reserves the rights to modify a product, without prior notice,
whether in price, design, color or codes, in order to offer at all times quality products that are highly competitive.
Imperial Air Technologies
480 Ferdinand Blvd., Dieppe, NB E1A 6V9
1-888-724-5211 Fax [phone]
www.imperialgroup.ca
RESIDENTIAL USE ONLY
Item# PR0754
Models
XDH 7.15 HRV (Item No. 102610)
Solace XPH 1.5 HRV (Item No. 102389)
Solace XPH 2.0 HRV (Item No. 102390)
PH 7.15 HRV ES (Item No. 102391)
PH 10.22 HRV ES (Item No. 102392)

Page 2
IMPORTANT - PLEASE READ MANUAL BEFORE INSTALLATION
ABOUT US
CONTENTS
TO REDUCE OR AVOID THE HAZARDS OF ELECTRIC SHOCK AND FIRE:
CAUTIONS CONCERNING THE OPERATION AND FULL EFFICIENCY OF THIS PRODUCT:
CAUTION: Do not install in a cooking area or connect directly to any appliance. Turn off all integral disconnects before servicing.
NOTICE:
Prior to installing, serious consideration must be taken to insure this ventilation system will operate properly if integrated to any other type
of mechanical system, i.e. a forced air system, or an air handling unit. To insure proper operation & compatibilities of both system, it is required that the
airflow’s of the Heat Recovery Ventilator (HRV) or Energy Recovery Ventilator (ERV) be balanced, by following the procedures found in this manual.
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 airhandler 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.
LIMITATIONS: The product is for residential applications only. Must be installed in accordance with all national and local regulations, building and
safety codes.
Imperial Air Technologies Inc. is the only manufacturer that offers you a complete range of products designed to improve indoor air quality, and that
provides a wide selection of accessories to facilitate installation.
Our vision – To offer a complete range of products that satisfies environmental concerns.
Whether your needs involve ventilation or filtration, we have the customized solution for you, with its range of quality products backed by the best
warranty in the industry.
SECTION PAGE
1. Ventilation requirements . . . . . . . . . . . . . . . . . . . . . . . . . .3
2. Fitting equivalent lengths . . . . . . . . . . . . . . . . . . . . . . . . . .4
3. Types of Installations . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
4. Installation Kit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
5. Finding a suitable installation area for HRV or ERV . . . . . . . . . . .7
6. Installation of the HRV / ERV . . . . . . . . . . . . . . . . . . . . . . . .7
7. Insulated Flex from Unit to Outside Wall . . . . . . . . . . . . . . . . .8
8. 5th Port Defrost Sequence (XDH Model Only). . . . . . . . . . . . . .8
9. Condensation Drain Line . . . . . . . . . . . . . . . . . . . . . . . . . .9
10. Dedicated Electric Receptacle . . . . . . . . . . . . . . . . . . . . . .9
11. Outside Fresh Air and Exhaust Air Hoods . . . . . . . . . . . . . . . .9
12. The matrix™ High Performance Ventilation Hood . . . . . . . . . . 10
13. Benefits of the Duotrol™ System. . . . . . . . . . . . . . . . . . . . 10
14. Balancing the unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
15. Controls Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
16. Wiring Diagrams for furnace interlock systems . . . . . . . . . . . 13
17. Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
18. Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
• BeforeservicingorcleaningtheHRVsystem,alwaysremovethe
power cord from the AC wall outlet.
• Toreducethehazardsofelectricshockorre,donotperformany
service to the HRV system other than those stated in the operating
manual instructions.
• Toreducetheriskofelectricshock,thisventilationsystem(HRV/ERV)
comes equipped with a 3-prong plug-in. This plug will fit in a polarized
outlet only one way.
• Donotuseventilationsystemforoutdoorapplication.
• Donotpullortwistpower cord whendisconnectingitfromthe
ventilation system. Grasp the plug firmly, not the cord.
• Donotmodifythepowerpluginanyway;ifmodied,riskofelectric
shock fire or even damage to the unit may occur.
• Donotusetheventilationsystemforremovalofammablefumes,
gases or connect directly to any appliances.
• UseadedicatedAC120Voutletonly.
• Donotobstructorcovertheairintakeorairoutletoftheventilation
system.
• Donotmodify,repairordisassemblethissystem.Thesetasksareto
be performed by authorized serviced personnel only. Fire, electrical
shock and/or bodily injury may occur if these warnings are not
followed.
• Topreventinjuries,donotoperatetheventilationsystem,while
servicing or maintaining. There are impeller wheels turning at a very
high speed that must fully stop rotating prior to accessing the inside of
the unit.
• Alwaysassesstheoperationoftheventilationsystemonhowitmay
interact with vented combustion equipment (ie. Gas Furnace, Oil
Furnace, Combustion, Appliances, etc.)
• Donotuseforswimmingpool/spaapplications.

Page 3
1. VENTILATION REQUIREMENTS
DETERMINE YOUR
VENTILATION NEEDS
INSTALLATION
How much fresh air do I need?
Good air quality is based in part
on the capacity of the home’s
ventilation system.
Usually, the HRV’s/ERV’s capacity
is measured in CFM (Cubic Feet
per Minutes) or L/s (Liters per
Seconds) of fresh air being
distributed in the living space.
The Room Count Calculation or
the Air Change per Hour Method
shows you how to determine your
ventilation needs.(see chart on
right)
A. Room Count Calculation
LIVING SPACE NUMBER OF ROOMS CFM (L/S) CFM REQUIRED
Master Bedroom ———— x 20 cfm (10 L/s) = ————
With Basement ———— x 20 cfm (10 L/s) = ————
Single Bedroom ———— x 10 cfm (5 L/s) = ————
Living Room ———— x 10 cfm (5 L/s) = ————
Dinning Room ———— x 10 cfm (5 L/s) = ————
Family Room ———— x 10 cfm (5 L/s) = ————
Recreation Room ———— x 10 cfm (5 L/s) = ————
Other ———— x 10 cfm (5 L/s) = ————
Kitchen ———— x 10 cfm (5 L/s) = ————
Bathroom ———— x 10 cfm (5 L/s) = ————
Laundry Room ———— x 10 cfm (5 L/s) = ————
Utility Room ———— x 10 cfm (5 L/s) = ————
TOTAL ventilation requirement (add last column) = ————
1 CFM = 0.47189 L/s
1 L/s = 3.6 m3/hr
B. Air Change per Hour Method
TOTAL cu ft X 0.35 per hr = total
Take total and divide by 60 to get CFM
Example: A 25’x 40’ house with basement
1,000 Sq. ft. x 8’ high x 2(1st floor + basement) = 16,000 cu. ft.
16,000 cu. ft. x 0.35 ACH = 5,600 cu. ft.
5,600 cu. ft. / 60 Minutes = 93.3 CFM
93.3 CFM IS YOUR VENTILATION NEED

Page 4
2. FITTING EQUIVALENT LENGTHS
- Flex pipe equivalent length is
smooth pipe x2
- Flex fitting equivalent length is
smooth fitting x2
- 45º perimeter pipe elbow
equivalent length = 5 ft. (1.52 m)
NOTE: Where flex duct is used
to make 45º elbow
equivalent length =
10 ft. (3.0 m)
- Y-equal sides
equivalent length = 10 ft. (3.0 m)
- Y-Side branch
equivalent length =
35 ft. (10.7 m)
- Round plastic diffuser
equivalent length = 100 ft. (30.5 m)
NOTE: Maximum airflow assumes
diffuser is in full open position.
- Tee take-off
equivalent length =
50 ft. (15.24 m)
- Angle boot
equivalent length = 30 ft. (9.14 m)
- 90º perimeter pipe elbow
equivalent length = 10 ft. (3.0 m)
NOTE: Where flex duct is used
to make 90º elbow
equivalent length = 20 ft. (6.1 m)
- Round wall cap spring
damper or screen
equivalent lengths =
60 ft. (18.29 m)
- Wall grill 50% free area
equivalent length = 15 ft. (4.6 m)
- Increaser/Reducer
equivalent length
= 8 ft. (2.43 m)

Page 5
3. TYPES OF INSTALLATIONS
DIRECT DUCTED SYSTEM
This application uses a devoted
duct system for the supply
and the exhausting of stale air
accumulated in the home.
It is recommended to install fresh
air grilles in all bedrooms and living
areas. Exhaust the stale air from
the bathroom, kitchen and laundry
room. (see figure 3.1)
IMPORTANT:
For optimal performance
of your HRV or ERV, the installation of an
optional 6” round galvanized backdraft
damper is required on the fresh air to
home duct work.
figure 3.1
EXTENDED EXHAUST
SYSTEM
This application uses a devoted
duct system for the exhausting of
stale air accumulated in the home.
The fresh air is dumped into the
return air duct and is distributed
thru the home by the existing
supply air ductwork of the forced
air system. (see figure 3.2)
Make sure when using this application
that your fresh air duct connection to
the forced air system return air duct
is not less than 10ft (3 m) upstream of
the return plenum connection to the
forced air system. Check with your
local code or the forced air system’s
manufacturer. The HRV and forced air
system must be in continuous mode,
to achieve maximum comfort and to
avoid cross-contamination.
NOTE TO INSTALLER: Dwellings
with multiple forced air systems
requires one HRV/ERV per system.
Insure the unit runs in conjunction
with forced air system (Ref. wiring
diagram for furnace interlock)
figure 3.2
* For minimum distance between
return and forced air system, check
with your local building codes and
forced air system manufacturer.
IMPORTANT: The duct bringing
outdoor air to the return air plenum
must be equipped with a manual
dumper to balance the outdoor
airflow.
IMPORTANT: For optimal performance of your HRV or ERV, the installation of an optional 6" round galvanized backdraft damper is required on the fresh air to home duct
work. When performing duct connections, always use approved tools and material. Also use steel duct connections for these type of installs.
Return from
Bathroom or Kitchen
Distribution to
living space
18”
457 cm
6 ft
1.83 m HRV/ERV
HRV/ERV
Return from
Bathroom or Kitchen
Distribution to
living space
18”
457 cm
6 ft
1.83 m
A
B
A+B=Not less than 10ft (3 m) *
HRV/ERV
Distribution to
living space
18”
457 cm
6 ft
1.83 m
A
B
A+B=Not less than 10ft (3 m)*
3ft (0.9 m)
MINIMUM
DISTANCE
Return from
Bathroom or Kitchen
Distribution to
living space
18”
457 cm
6 ft
1.83 m HRV/ERV
HRV/ERV
Return from
Bathroom or Kitchen
Distribution to
living space
18”
457 cm
6 ft
1.83 m
A
B
A+B=Not less than 10ft (3 m) *
HRV/ERV
Distribution to
living space
18”
457 cm
6 ft
1.83 m
A
B
A+B=Not less than 10ft (3 m)*
3ft (0.9 m)
MINIMUM
DISTANCE

Page 6
3. TYPES OF INSTALLATIONS (CONTINUED)
SIMPLIFIED SYSTEM
INSTALLATION
When using this application make
sure that there is minimum 3 feet
(0.9 m)between the fresh air and
exhaust air connections of the
HRV/ERV in the return air duct.
(see figure 3.3)
Make sure when using this application
that your fresh air duct connection to
the forced air system return air duct
is not less than 10ft (3 m) upstream of
the return plenum connection to the
forced air system. Check with your
local code or the forced air system’s
manufacturer. The HRV and forced air
system must be in continuous mode,
to achieve maximum comfort and to
avoid cross-contamination.
NOTE TO INSTALLER: Dwellings
with multiple forced air systems
requires one HRV/ERV per system.
Insure the unit runs in conjunction
with forced air system (Ref. wiring
diagram for furnace interlock)
* For minimum distance between
return and forced air system, check
with your local building codes and
forced air system manufacturer.
IMPORTANT: For optimal performance of your HRV or ERV, the installation of an optional 6" round galvanized backdraft damper is required on the fresh air to home duct
work. When performing duct connections, always use approved tools and material. Also use steel duct connections for these type of installs.
Return from
Bathroom or Kitchen
Distribution to
living space
18”
457 cm
6 ft
1.83 m HRV/ERV
HRV/ERV
Return from
Bathroom or Kitchen
Distribution to
living space
18”
457 cm
6 ft
1.83 m
A
B
A+B=Not less than 10ft (3 m) *
HRV/ERV
Distribution to
living space
18”
457 cm
6 ft
1.83 m
A
B
A+B=Not less than 10ft (3 m)*
3ft (0.9 m)
MINIMUM
DISTANCE
figure 3.3
IMPORTANT: The duct bringing
outdoor air to the return air plenum
must be equipped with a manual
dumper to balance the outdoor
airflow.
Interior Wall
Recirculated Air
Exterior Wall
MECHANICAL ROOM
MECHANICAL ROOM
Recirculated
warm ambient
air to home
Recirculation Port
Recirculated
warm ambient
air to home
Exhaust hood equiped
with damper or installation
of optional backdraft damper
Recirculation Port
Interior Wall
Recirculated Air
Exterior Wall
MECHANICAL ROOM
MECHANICAL ROOM
Recirculated
warm ambient
air to home
Recirculation Port
Recirculated
warm ambient
air to home
Exhaust hood equiped
with damper or installation
of optional backdraft damper
Recirculation Port
FOR TYPE OF HRV/ERV WHICH USES A 5TH PORT FOR THE DEFROST SEQUENCE.
The 5th port must be duct so as to avoid a depressurization during defrost. (Reference: Quebec, Novoclimat 2.0, Section 3.4.3.3)
Building and combustion appliance installation codes do not allow return air grilles or openings such as "breather tee" or indirect connections in an
enclosed room that is susceptible to spillage of combustion appliances.
Option 1 Option 2

Page 7
4. INSTALLATION KIT
INSTALLATION KIT
INCLUDES:
•4Collars(5CollarsXDH7.15only)
•2FlexibleVinylDuctsforsound
attenuation
•1CondensationDrainLine
•1DrainAdapterwithNut
•4TieWraps(30”)
•16screws(#10x5/8”)
•4screws(#10x1”)
•4Washers
•AC120Vpowercord
TIP TO INSTALLER: Removing the
core unit will facilitate your job.
figure 4.1
5. FINDING A SUITABLE INSTALLATION AREA FOR HRV OR ERV
The HRV/ERV unit should be installed in a mechanical room or as close to an outside wall as possible. This
would assure a short run of insulated flexible duct.
The HRV/ERV unit must always be installed in an area where the air is tempered to avoid freezing of the
condensate line. The contractor should install the unit in an area that is very accessible to allow the homeowner
easy access for maintenance.
It is very important to install an electric receptacle (115v) near the HRV / ERV, a separate circuit breaker is
also recommended. You should have access to a condensate drain near the HRV/ERV to avoid the use of
condensate pump.
6. INSTALLATION OF THE HRV / ERV
The entire line of Imperial HRV/
ERV products is designed for
“Single Person MountingTM”
(SPM). It will enable you to save
time and effort by offering you a
variable attachment system and
maximizing your basement space.
TIP TO INSTALLER: Place HRV/
ERV on a stepladder to ease the
hanging process. If the unit is not
level, improper drainage will occur
and could lead to moisture and
leakage problems.
It is recommended to use
approximately 16 inches of flexible
duct (supplied in kit) between the HRV
or ERV and your rigid duct. The flex
duct is mounted the same way to the
HRV or ERV as the insulated flex.
figure 6.1 Attach your four straps to the
floor joist making sure that you attach thru
the washers and the grommets.
figure 6.2 Pull on the middle strap and
gently push upward on the unit. Then
repeat procedure on other side.
figure 6.3 When completing the procedure
make sure that the HRV or ERV is leveled.

Page 8
8. 5TH PORT ADVANCED DEFROST SEQUENCE (XDH MODEL ONLY)
If your have a model XDH with the
recirculation mode, you can mount
your duct to recirculate the air
from a cathedral ceiling, or where
heated ambient air is available.
The recirculation mode takes
already-heated ambient air from
a selected area, recirculates it
through the unit’s filters, and
distributes throughout your home.
This option enables the unit to have
an auxiliary air supply during the
system’s defrost period in winter,
and offers you better air quality
without unpleasant odors.
WARNING:
Never
install a stale air or
recirculation grill in a
closed room containing
a combustion device,
such as gas furnance,
gas water heater
fireplace or wood
burning stove.
Recirculation of warm
ambient air without
unpleasant odors
Recirculated
warm ambient
air to home
Fresh air
from outside
Exhaust air
to outside
Exhaust air
from home
Fresh air
to home
Continuous Ventilation Mode
A
dvanced Defrost Sequence / Recirculating Mode
Recirculation of warm
ambient air without
unpleasant odors
Recirculated
warm ambient
air to home
Fresh air
from outside
Exhaust air
to outside
Exhaust air
from home
Fresh air
to home
Continuous Ventilation Mode
A
dvanced Defrost Sequence / Recirculating Mode
7. INSULATED FLEX FROM UNIT TO OUTSIDE WALL
WARNING: Always fix and secure
the 6" collars with the screws supplied.
Avoiding this critical step the unit will
accumulate condensation.
TIP TO INSTALLER: To ensure a
better installation and to avoid an
undesired bend in the duct, align
the duct with the collar before
securing over the four hooks.
The Fresh air from outside and the
Exhaust air to outside from the
termination ducts to the HRV/ERV
must be fully insulated of thermal
insulation ducts to minimize heat
loss and gain.
All tapes, mastics, and nonmetallic
clamps used for field installation
of flexible ducts shall be listed
and labeled to Standard UL
181B - Closure Systems for Use
With Flexible Air Ducts and Air
Connectors.
Air Connector A category of
flexible duct not meeting the
requirements of an Air Duct per UL
181 Standard (not tested for flame
penetration, puncture and impact)
and having limitations on use,
length and location as defined by
NFPA 90A and 90B.
Air Connectors are identified by a
“round shape” listing label of the
listing agency.
Air Duct A category of flexible
duct tested and classified as to the
Surface Burning Characteristics
in accordance with the UL 181
Standard
Air Ducts are identified by a
“rectangular shape” listing label of
the listing agency.
To ensure quiet operation of ENERGY
STAR qualified HRV/ERVs, each
product should be installed using sound
attenuation techniques appropriate for
the installation. (Ref. Figure 7.5)
figure 7.1 Insert vinyl duct over the hooks
and seal with a Tie wrap.
figure 7.2 Insert insulation inside the
double collar.
figure 7.3 Finish by taping the vapor barrier
to the collar to insure proper seal.
Once insulated flex is attached to
the collar, slide collar in keeper
section, fixed collar to the unit
with four screws supplied in
installation kit to insure a proper
seal.
figure 7.4 Slide collar on the unit.
Figure 7.5 Fix and secure with two screws
supplied.
IMPORTANT: Always consult your national and
local regulations, building and safety codes.

Page 9
9. CONDENSATION DRAIN LINE
10. DEDICATED ELECTRIC RECEPTACLE
Insert the threaded drain adapter
thru the bottom of the HRV/ERV and
hand tighten the plastic nut, and with
a wrench tighten the nut another half
turn to assure a better seal.
Install the condensate line
(included in drain kit). Insert
condensate tubing by pushing
clear plastic line over drain
adapter. Make condensate trap
by looping the clear plastic tubing.
This procedure is to avoid foul odor
to enter the HRV or ERV.
IMPORTANT: Always consult
a certified technician to insure
proper installation of main power.
NOTE: If LED light on the Duotrol
remains green, motors not
energized controls do not operate.
Polarization in main AC outlet are
inverted.
It is recommended that the HRV/
ERV have a dedicated receptacle
with 115v. It is not recommended to
connect unit with an extension cord.
figure 10.1 Insert the power cord on top of the unit. Press firmly to
make sure the power cord is secure.
figure 10.2 It is recommended that the HRV or ERV have a dedicated
receptacle with 115v. It is not recommended to connect unit with
an extension cord. If no receptacle is available please call an
electrical contractor and have one installed. Insure polarized is
correct
figure 9.1 Make a loop in condensate line, not be subject to
freezing temperatures.
figure 9.2
Use a condensate pump if you don’t have access to a drain.
11. OUTSIDE FRESH AIR AND EXHAUST AIR HOODS
TIPTOINSTALLER: We recommend
and it is good practice to have a
minimum of 6ft (1.83 m) between
the supply and exhaust vents,
unless using a concentric vent
design to prevent contamination of
intake air.
Always properly seal the supply
& exhaust hoods to the exterior
of the thermal envelope of the
building with caulk or other similar
material to inhibit air leakage.
NOTE:
Outdoor air intake hoods shall
be located to avoid contamination
from sources such as:
•Exhaustairopenings
•Driveways(autoexhaust)
•Combustionappliances
•Gasmeters,oilllpipes
•Garbagecontainers
•Atticsorcrawlspaces
•Underdeckorotherareasof
questionable air quality
figure 11.1 Locating Outside Hoods
6ft (1.83 m)
18" (457 mm)
IMPORTANT: Always consult your national and
local regulations, building and safety codes.

Page 10
13. BENEFITS OF THE DUOTROL™ SYSTEM
MODE SELECTOR
•Intermittent
•Continuous
•Off
SPEED ADJUSTMENT
•IncreaseSpeed(+)
•DecreaseSpeed(–)
ACTS AS A MODE SELECTOR
INTERMITTENT: When the selector switch is in the intermittent position
the HRV/ERV will only run when there is a call for ventilation by any
control. At that time the unit will run on high speed until the condition
is satisfied.
CONTINUOUS: When the selector switch is in the continuous position
the HRV/ERV will run continuously on pre set speed except when there
is a call for override by any control.
OFF: When the selector switch is in the off position the HRV/ERV will not
come on even if there’s a call for ventilation by any control.
+ BUTTON: Increase the speed of the selected motor.
– BUTTON: Decrease the speed of the selected motor.
12. THE MATRIX™ HIGH PERFORMANCE VENTILATION HOOD
Exhaust air from home
“TOP”
Exterior wall
Fresh air from outside
Uniquely design individual
insulated transition duct (UL 94 Rated)
Fresh air to home
“BOTTOM”
Transition
connector plate
Ventilation
cap
Exhaust air
to outside
AIRFLOW &
INSTALLATION
IMPORTANT: Install ventilation hood
aminimumof18”(457mm)abovegrade.
Do not install under a deck, enclose
porch, patio, garages, crawl spaces or
attics.
WARNING: Insure the ventilation
hood is at a minimum clearance of 6 ft
(1.83 m) away from the exhaust vents of
a combustion source and contaminants.
Ex: Gas furnace, dryer, gas boilers,
range hoods, barbecue, garbage bin,
driveway or garage.
AIRFLOW
PERFORMANCE DATA
LIMITATIONS: This product is for
residential applications only. Must be
installed in accordance with all current
national and local regulation building
and safety codes.
Limitations: This product is for residential applications only. Must be installed in accordance with all current national and local regulation building and safety codes.
Airflow Performance Data
0.25
0.2
0.15
0.1
0.05
0
30 45 60 75 90 105 120
Exhaust Air Flow Performance
External Static Pressure
in wg (Pa = n x 248.36)
CFM (L/s = n x 0.4719)
30 45 60 75 90 105 120
0.25
0.2
0.15
0.1
0.05
0
Supply Air Flow Performance
External Static Pressure
in wg (Pa = n x 248.36)
CFM (L/s = n x 0.4719)
IMPORTANT: Always consult national and your
local regulations, building and safety codes.
LIMITATION: This product is for residential
applications only.

Page 11
DUOTROLTM BALANCING SYSTEM
PROCEDURES, STEPS 1 THROUGH 8.
Step 1: Press the (+) and (–) buttons simultaneously
until you see the yellow light. Once the indicator light
turns yellow you are in balancing mode.
Step 2: When in balancing mode the selector switch
becomes the motor selector switch. INTER (Right
Motor), CONT (Both Motors) and OFF (Left Motor)
Step 3: Once the total cfm needed is determined,
you can start balancing the HRV/ERV. Set your fresh
air supply by selecting the «OFF» position on the
DuotrolTM. Install your magnehelic gauge and air flow
grid in the fresh air duct.
Step 4: Press the (–) button to decrease the cfm or
press the (+) button to increase the cfm.
Step 5: Then perform the same operation on the stale
air side by selecting the «INTER» position on the
DuotrolTM.
Step 6: The «CONT» position will allow you to
adjust the cfm on both motors proportionately (if
necessary).
Step 7: Once this is completed, you have set the high
speed on your HRV/ERV. To exit the balancing mode
you must press (+) and (–) buttons simultaneously
and release. The indicator light will turn green to
indicate normal operation mode.
Step 8: Once high speed is set and locked, switch
to continuous on the DuotrolTM. By using (+) and (-)
buttons set continuous speed.
USING THE SELECTOR SWITCH
TIP TO INSTALLER: When on Balancing Mode, the
Selector Switch allows you to choose the motor you
want to set.
A) CLOSED DUOTROL COVER
1. INTER (Exhaust Motor)
2. CONT (Both Motors)
3. OFF (Supply Motor)
B) OPEN DUOTROL COVER
1. UP (Exhaust Motor)
2. MIDDLE (Both Motors)
3. DOWN (Supply Motor)
WITH THE DUOTROL™
SYSTEM
GREEN LIGHT
MODE SELECTOR
YELLOW LIGHT
BALANCING MODE
14. BALANCING THE UNIT
WITH AN AIRFLOW GRID
& MAGNEHELIC GAUGE
Magnehelic Gauge with Air Flow Grid Inserting Air flow grid in duct Seal Air flow grid in duct with duct tape.

Page 12
CAUTION: Minimum wire requirements is LVT18 CSA/UL 4 strain to insure proper connection.
T3 TIMER (3 wires)
R
G
B
W
G
R
B G R
R W B G
To Casing
Screw
for Ground
R W B G
Jumper
JP-4*
2 Relays
1 Relay
LVC Version 1
LVC Version 2
Jumper
JP-4*
15. CONTROLS CONNECTION
RD-1 (2 wires)
RD-3D, RD-4D (4 wires)
(XDH Series only)
R
G
B
W
G
R
B G R
R W B G
To Casing
Screw
for Ground
R W B G
Jumper
JP-4*
2 Relays
1 Relay
LVC Version 1
LVC Version 2
Jumper
JP-4*
R
G
B
W
G
R
B G R
R W B G
To Casing
Screw
for Ground
R W B G
Jumper
JP-4*
2 Relays
1 Relay
LVC Version 1
LVC Version 2
Jumper
JP-4*
Installation of a RD-Series main wall control with your HRV/ERV will improve
comfort and may significantly reduce the product’s energy use.

Page 13
16. WIRING DIAGRAMS FOR FURNACE INTERLOCK SYSTEMS
STANDARD FORCED AIR
INTERLOCKING WIRING
A relay is normally used when tying
a ventilation system to the forced air
distribution system. Our Duotrol System
is equipped with an internal relay that
will activate the forced air system’
ventilator when there is a demand from
the HRV /ERV. The Duotrol System will
activate the INTERLOCK relay during
the following modes: Continuous,
Override,Recirculation and Defrost.
See wiring diagram.
ALTERNATE FORCED AIR
INTERLOCKING WIRING
Some forced air system thermostat
will activate the cooling system when
tied using the «Standard forced air
interlocking wiring».
If you have identify this type of
thermostat you must proceed with the
«Alternate Forced Air Wiring».
LOCATING THE
WIRING DIAGRAM
NOTE TO INSTALLER:
Wiring
Diagram for the entire line of HRV/ERV
Models are placed on the back of each
Exhaust motor bracket.
CAUTION: Thermostat that control
A/C system must use the Alternate
Interlock Wiring Diagram.
Low Voltage HRV Controller
Low Voltage HRV Controller
Thermostat
Legend: -------- Field Installed Low Voltage
Figure 16.1 Standard forced air wiring diagram
Figure 16.2 Alternate forced air wiring diagram
Legend: -------- Field Installed Low Voltage
Force Air System
Force Air System
*Before tying the HRV/ERV to
a forced air system, always
refer to system’s manual or
manufacturer.
WARNING: Always disconnect the unit prior to making any connections. Failure to disconnecting the power could result in electrical shock or can
damage the electronic boards, wall controls and/or unit.
CAUTION: Minimum wire requirements is LVT18 CSA/UL 4 strain to insure proper connection.

Page 14
17. TROUBLESHOOTING
QUESTION / ITEM DIAGNOSIS / SOLUTION
•HRV/ERVnotrunning • Verifybreakerinmainelectricalpanel
• VerifytheHRVorERVisintheONposition
• VerifytheallwallcontrolsswitchontheHRVorERVareactivatedtosupplypowertotheunit
• UnplugHRVorERVverifyifthecontrolleriswiredcorrectlytotheconnectionboxonthesideoftheunit
• Verifymainoutletpolarization
•Airistoodry • Increasethehumiditylevelonthecontroller
• Reducecontinuousairowrate
• Switchventilationmodefromcontinuoustointermittent
• Humidierrecommendedifheatingsourceisaforcedairsystem
•Airtoohumid • SuggestcontinuousoperationofHRVorERV
• Reducehumiditylevelondehumidistat
• Increasecontinuousairowrate
• Insufcientventilation,checkcapacity
• Internalsourceofmoisture,e.g.heatingwoodstoreinbasement,possibleleaksorpoorinsulationR-valueandor
dryer is venting in basement
•Vibrationornoise • Verifythatvibrationmountingstraps,hangingchainsorwallbracketisusedforhangingtheunits.
• VerifythatexibleductconnectionsareusebetweentheHRVorERVandtherigidduct.
• Verifythatthemotorsareoperatingandarenotobscuredbyanydebris
• Insuremotormovesfreelywithturningbyhand.
•Coldair • Misplacedsupplyoutlets
• Defrostnooperatingcorrectly
• TheHRVorERVnotproperlybalanced
• Highairowonfurnacecontinuousmode
• InsureHRVorERVisinterlockwhenintegratedwithforcedairsystem
•ContaminationorPollutants • Insureproperclearanceofventilationhoodsfromsourceofcontaminants
Refer to section 10. Outside Fresh Air and Exhaust Air Hoods.
•Condensation • VerifythattheHRVorERVisleveltoinsureproperdrainage
• VerifythattheductconnectionarexandsecuredwithscrewstotheHRVorERV.
• Verifythecoldsideductconnectionsarefullyinsulatedandthatvaporbarrieristapedtoinsureaproperseal.
• Lookforsignsofcrushedsection,failingductstraps,puncturevaporbarrier,missinginsulation.
• Insurepropersealofvaporbarriertooutsidewall.
• Lookforsignofwateraccumulation/leakage/dripping
• Verifythatthedrainconnectionisnotkinked;the“P”trapisnottoclosetounitorobscuredwithdebris.

Page 15
18. MAINTENANCE
All Imperial Air Technologies products are backed by the best limited warranty on the market.
Imperial Air technologies Inc. reserves the rights to modify a product, without prior notice, whether in price, design, color or codes, in order to offer at all times quality
products that are highly competitive.
ALWAYS CONSULT YOUR NATIONAL AND LOCAL REGULATIONS BUILDING AND SAFETY CODES.
ROUTINE MAINTENANCE
SEVEN-STEP MAINTENANCE
SCHEDULE
With routine preventativemaintenance,
you can avoid unnecessary problems,
ensure the effectiveness of your HRV,
and prolong its life. For additional
specific instructions, refer to your HRV
operating manual or ask the contractor
who installed or services the HRV to
demonstrate the proper maintenance
procedures.
WARNING:
BE SURE TO DISCONNECT THE
ELECTRICAL POWER BEFORE
SERVICING YOUR SYSTEM
1. Clean or replace air filters. Filters,
which are located within the HRV
should be cleaned every two to three
months. Filters should be vacuumed
first, then washed with a mild soap
and water. Most washable filters will
last several years before needing to
be replaced.
2. Clean the exterior intake and
exhaust vents of obstructions.Check
the outside vents regularly to ensure
that the screen openings are not
obstructed by grass, bushes, leaves,
snow or other debris.
3. Clean and inspect the heat-exchange
core and aluminum louvers (Ref. Fig.
17.1 for proper orientation of louvers).
Twice a year and clean it as required
(consult your owner’s manual
for in
structions on inspecting and
cleaning the core). A build-up of dust
and dirt can restrict airflow and reduce
the efficiency of your HRV/ERV. After
inspection and cleaning, make sure the
core is replaced right-side-up.
4. Clean the condensate drain and pan.
Twice a year, check the condensate
drain and tubing to ensure that
they are open and free-flowing.
The tubing can be disconnected for
cleaning. The condensate drain must
havea“trap”inthetubingthattraps
a quantity of water – to prevent air
from entering the HRV/ERV via this
tubing
5. Service the fans. The fans on the
HRV/ERV’s are designed to operate
continuously without lubrication.
Inspect the blower fans periodically
for dirt on the blades, and remove
it by gently brushing the blades or
using a vacuum cleaner.
6. Clean the grilles and inspect the
ductwork. Clean the grilles when
they are dusty. At least once a year,
visually inspect the ductwork leading
to and from the HRV. Damaged ducts
can lead to condensation problems,
including wet insulation, water on
the floor and, ice build-up. If the
insulation itself is damaged.
7. Arrange for an annual servicing.
Your HRV/ERV should undergo
annual general servicing by a
certified contractor and who is
familiar with your HRV. If possible,
have your furnace and HRV serviced
atthesametime;thiswillresultin
less inconvenience and cost than
two separate visits.
For proper orientation of louvers.
(Only on Solace and PH /ES Series)
FIG 18.1

Imperial Air Technologies
480 Ferdinand Blvd., Dieppe, NB E1A 6V9
1-888-724-5211 Fax [phone]
www.imperialgroup.ca
Item# PR0754