Carrier HRVXXLHB User manual

HRVXXLHB
Installation Instructions
Heat Recovery Ventilator
A05260
HRVXXLHB Unit
These products earned the
ENERGY STAR®by meeting strict
energy efficiency guidelines set by
Natural Resources Canada and
the US EPA. They meet ENERGY
STAR requirements only when
used in Canada.
INTRODUCTION
The Heat Recovery Ventilator (HRV) is used to exchange indoor
stale air with outside fresh air. The HRV unit is equipped with a
special heat recovery core which transfers sensible heat between
the fresh incoming air and stale exhaust air.
It is required to locate the HRV in a conditioned space. Special
attention should be given to condensate drain, duct application,
balancing the HRV, and locating unit for easy access and routine
maintenance. The cross- flow design core allows entering and
leaving air streams to transfer heat energy without mixing.
NOTE: Read the entire instruction manual before starting the
installation.
SAFETY CONSIDERATIONS
Improper installation, adjustment, alteration, service, maintenance,
or use can cause explosion, fire, electrical shock, or other
conditions which may cause death, personal injury or property
damage. Consult a qualified installer, service agency or your
distributor or branch for information or assistance. The qualified
installer or agency must use factory- authorized kits or accessories
when modifying this product. Refer to the individual instructions
packaged with the kits or accessories when installing.
Follow all safety codes. Wear safety glasses, protective clothing,
and work gloves. Have a fire extinguisher available. Read these
instructions thoroughly and follow all warnings and cautions
included in literature and attached to the unit. Consult local
building codes and the current edition of the National Electrical
Code (NEC) NFPA 70.
In Canada, refer to the current editions of the Canadian Electrical
Code CSA C22.1.
Recognize safety information. When you see this symbol on
the unit and in instructions or manuals, be alert to the potential for
personal injury. Understand the signal words DANGER,
WARNING,andCAUTION. These words are used with the
safety- alert symbol. DANGER identifies the most serious hazards,
which will result in severe personal injury or death. WARNING
signifies hazards, which could result in personal injury or death.
CAUTION is used to identify unsafe practices, which may result
in minor personal injury or product and property damage. NOTE
is used to highlight suggestions which will result in enhanced
installation, reliability, or operation.

2
TYPICAL INSTALLATIONS
NOTE: Installation may vary according to the model number and
the position; normal or reverse in which the unit is installed.
There are three common installation methods.
Fully Ducted System
(Primarily for homes with radiant hot water or electric baseboard
heating.) See Fig. 1.
Moist, stale air is exhausted from the high humidity areas in the
home, such as bathrooms, kitchen and laundry room.
Fresh air is supplied to bedrooms and principal living areas. If
required, bathroom fans and a range hood may be used to better
exhaust stale air.
Homes with more than one level require at least one exhaust
register at the highest level.
A12281
Fig. 1 - Fully Ducted System
Exhaust Ducted System (Source Point Ventilation)
(For homes with forced air heating.) See Fig. 2.
Moist, stale air is exhausted from the high humidity areas in the
home, such as bathrooms, kitchen and laundry room. Fresh air is
supplied to the cold air return or the supply duct of the furnace. If
required, bathroom fans and a range hood may be used to better
exhaust stale air.
Homes with more than one level require at least one exhaust
register at the highest level.
NOTE: For this type of installation, it is not essential that the
furnace blower runs when the unit is in operation, but we
recommend it.
A122282
Fig. 2 - Exhaust Ducted System
Simplified (Volume Ventilation)
(For homes with forced air heating.) See Fig. 3.
Fresh air and exhaust air flow through the furnace ducts, which
simplifies the installation.
The use of bathroom fans and a range hood is suggested to exhaust
stale air.
NOTE: For this type of installation, the furnaceblowermustbe
running when the unit is in operation.
A12283
Fig. 3 - Fully Ducted System

3
COMPONENT DESCRIPTION
The following listed items are components of HRVXXLHB. See
Fig.4.
2
3
10
8
1
4
5
7
9
6
A12284
Fig. 4 - Component Location
1. Stale air return from building connected to return- air duct
system.
2. Fresh- air intake connected to outdoor air inlet hood.
3. Exhaust- air connected to outdoor air exhaust hood.
4. Mechanical filters trap dust contained in the air.
5. Heat recovery core is a cross- flow type. The core transfers
heat between the 2 air streams. See Fig. 5 and Fig. 6.
6. Blowers bring in fresh- air from outside and exhaust stale-
air to outside.
7. Electronic control circuit ensures proper unit operation.
8. Fresh- air supply from HRV connected to return-air duct of
forced- air system.
9. Terminal connector block for wiring wall and timer con-
trols.
10. Electrical cord connects to standard 115V outlet.
A12285
Fig. 5 - Air Distribution (Normal Operation)
A12286
Fig. 6 - Air Distribution (Defrost Mode)
UNIT INSTALLATION
LOCATION
Inspect Equipment
Move carton to final installation location. Remove the HRV from
carton taking care not to damage unit. Remove all packaging and
inspect unit for damage. Remove parts bag from inside unit. File
claim with shipping company if shipment is damaged or
incomplete.
Select Location
The HRV should be located in a conditioned space and in close
proximity to a fused power source. It should be easily accessible
for routine maintenance.
If HRV is installed independent of a forced- air system, unit should
be located near the center of the air distribution system. If HRV is
installed in conjunction with a forced-air system, unit should be
located next to (or close to) the indoor equipment.
UNIT DAMAGE HAZARD
Failure to follow this caution may result in equipment
damage or improper operation.
Do not install HRV in a corrosive or contaminated
atmosphere.
CAUTION
!
ELECTRICAL SHOCK / FIRE HAZARD
Failure to follow this warning could result in property or unit
damage.
Do not use an extension cord as a power source for operating
the HRV.
!WARNING
UNIT DAMAGE HAZARD
Failure to follow this caution may result in reduced unit
efficiency, capacity or unit life.
DO NOT use HRV during construction of a house or when
sanding drywall. This type of dust may damage system.
CAUTION
!
Mount Unit
The HRV can be suspended from floor joists using chains and 4
springs. Attach metal hanging bracket to all 4 sides of cabinet (see
Fig. 7). Unit should always be installed as level as possible.

4
A12287
Fig. 7 - Chain Spring Installation
Independent System Application
In the absence of a forced- air system and a typical duct system
layout, the HRV can be applied as an independent or stand alone
unit. To ensure comfort, this type of application involves running
both fresh- air and return- air registers (or stale- air pickup registers)
throughout the home.
CARBON MONOXIDE POISONING HAZARD
Failure to follow this warning could result in personal injury
or death.
Do not install return- air registers (or stale- air pickup
registers) in same room as gas furnace or water heater.
!WARNING
Fresh-air registers are normally located in bedrooms, dining room,
living room, and basement. It is recommended that registers be
placed 6 to 12 in. (152 to 305 mm) from the ceiling on an interior
wall and airflow directed toward ceiling. If registers are floor
installed, airflow should be directed toward the wall.
Return- air (or stale- air pickup registers) are normally located to
draw from kitchen, bathroom, basement, or other rooms where
stale- air can exist.
Proper size and type of registers must be used to minimize pressure
drop. The velocity of airflow through register should not be above
400 ft/minute.
Calculating the Duct Size
Use the table below to ensure that the ducts you intend to
install will be carrying air flows at or under the recommended
values. Avoid installing ducts that will have to carry air flows
near the maximum values and never install a duct if its air flow
exceeds the maximum value.
Example of Calculation
PROBLEM: My installation requires two exhaust registers (one
for the kitchen, one for the bathroom). I will connect these registers
to a main duct which will connect to the unit (high speed
performance value of 140 cfm). What size of duct should I use for
the main exhaust duct and for the two end branches leading to the
registers? See Fig. 8.
END
BRANCHES
5˝ø
70 CFM
MAIN BRANCH
6˝ø 140 CFM
A12288
Fig. 8 - Main and End Branches
SOLUTION: Simplified method. (For a more detailed method of
calculating duct size refer to the ASHRAE or HRAI
HANDBOOK).
Main duct: Table above indicates a 6-in duct: Recommended air
flow: 120 cfm; maximum air flow: 180 cfm. The high speed air
flow of 140 cfm is close enough to the recommended value (120)
and far enough away from the maximum value (180). Therefore a
6-in duct or larger is an appropriate choice for the main exhaust
duct.
End branches: Each end branch will have to transport an air flow
of 70 cfm (140 divided by 2). Table above indicates a 5- in duct:
Recommended air flow: 75 cfm; maximum air flow: 110 cfm. The
high speed air flow of 70 cfm is close enough to the recommended
value (75) and far enough away from the maximum value (110).
Therefore a 5-in duct or larger is an appropriate choice for the 2
end branches.
NOTE:A4-induct would have been too small because the
maximum acceptable value for a 4- in duct is 60 cfm.
DUCT
DIAMETER
RECOMMENDED
AIR FLOW
MAXIMUM
AIR FLOW
4- in (102 mm) 40 cfm 19 L/s 68 M3/H 60 cfm 28 L/s 102 M3/H
5- in (127 mm) 75 cfm 35 L/s 127 M3/H 110 cfm 52 L/s 187 M3/H
6- in (152 mm) 120 cfm 57 L/s 204 M3/H 180 cfm 85 L/s 306 M3/H
7- in (178 mm) 185 cfm 87 L/s 314 M3/H 270 cfm 127 L/s 459 M3/H
8- in (203 mm) 260 cfm 123 L/s 442 M3/H 380 cfm 179 L/s 645 M3/H
NOTE: Examples use imperial measures. The same calculation applies to metric measures.

5
5˝ø
65
CFM
5˝ø
64
CFM
4˝ø
42
CFM 4˝ø
42
CFM
4˝ø
42
CFM
6˝ø
96
CFM
6˝ø
84
CFM
6˝ø
138
CFM
7˝ø
222
CFM
7˝ø
222
CFM
6˝ø
93
CFM
6˝ø
129
CFM
5˝
5˝
6˝
6˝ 6˝
6˝
7˝ 7˝
4˝
4˝ 4˝
4˝
4˝
A12289
Fig. 9 - Example of a design for a fully ducted system for a unit having a high speed performance of 222 cfm
Installing the Ductwork and the Registers
PERSONAL INJURY HAZARD
Failure to follow this caution may result in personal injury.
Never install a stale air exhaust register in a room where there
is a combustion device, such as a gas furnace, a gas water
heater or a fireplace.
!WARNING
PROPERTY DAMAGE HAZARD
Failure to follow this caution may result in property damage.
The ductwork is intended to be installed in compliance with
all local and national codes that are applicable.
CAUTION
!
Fully Ducted System
STALE AIR EXHAUST DUCTWORK:
SInstall registers in areas where contaminants are produced:
Kitchen, bathrooms, laundry room, etc.
SInstall registers 6 to 12 inches (152 to 305 mm) from the ceiling
on an interior wall OR install them in the ceiling.
SInstall the kitchen register at least 4 feet (1.2 m) from the range.
SIf possible, measure the velocity of the air flowing through the
registers. If the velocity is higher than 400 ft/min. (122 m/min),
then the register type is too small. Replace with a larger one.
FRESH AIR DISTRIBUTION DUCTWORK:
SInstall registers in bedrooms, dining room, living room and
basement.
SInstall registers either in the ceiling or high on the walls with air
flow directed towards the ceiling. (The cooler air will then cross
the upper part of the room, and mix with room air before
descending to occupant level.)
SIf a register must be floor installed, direct the air flow up the wall.
Exhaust Ducted System
STALE AIR EXHAUST DUCTWORK:
Same as for Fully Ducted System above.
FRESH AIR DISTRIBUTION:
PROPERTY DAMAGE HAZARD
Failure to follow this caution may result in property damage.
When performing duct connection to the furnace, installation
must be done in accordance with all applicable codes and
standards. Please refer to your local building code.
!WARNING
PROPERTY DAMAGE HAZARD
Failure to follow this caution may result in property damage.
When performing duct connection to the furnace supply duct,
this duct must be sized to support the additional airflow
produced by the ERV/HRV. Also, use a metal duct. It is
recommended that the ERV/HRV is running when the furnace
is in operation in order to prevent backdrafting inside
ERV/HRV.
CAUTION
!
There are two methods for connecting the unit to the furnace:
METHOD 1: SUPPLY SIDE CONNECTION
SCut an opening into the furnace supply ductat least 18 inches (0.5
m) from the furnace.
SConnect this opening to the fresh air distribution port of the
HRV/ERV (use metal duct). See Fig. 10.
M ETAL DUCT
M INIMUM
18’’ (0.5 M )
A12290
Fig. 10 - Supply Side Connection

6
SMake sure that the HRV/ERV duct forms an elbow inside the
furnace ductwork.
SIf desired, interlock (synchronize) the furnace blower operation
with the HRV/ERV operation.
METHOD 2: RETURN SIDE CONNECTION
SCut an opening into the furnace return duct not less than 10 feet
(3.1 m) from the furnace (A+B).
SConnect this opening to the fresh air distribution port of the
HRV/ERV. See Fig. 11.
NOTE: For Method 2, it is not essential that the furnace blower
runs when the unit is in operation, but we recommend it. If desired,
synchronize the furnace blower operation with the HRV/ERV
operation.
B
A
A+B= NOT LESS
THAN 10’ (3.1 M )
A12291
Fig. 11 - Return Side Connection
Simplified Installation
PROPERTY DAMAGE HAZARD
Failure to follow this caution may result in property damage.
When performing duct connection to the furnace, installation
must be done in accordance with all applicable codes and
standards. Please refer to your local building code.
!WARNING
PROPERTY DAMAGE HAZARD
Failure to follow this caution may result in property damage.
When performing duct connection to the furnace supply duct,
this duct must be sized to support the additional airflow
produced by the ERV/HRV. Also, use a metal duct. It is
recommended that the ERV/HRV is running when the furnace
is in operation in order to prevent backdrafting inside
ERV/HRV.
CAUTION
!
There are two methods for connecting the unit to the furnace ducts.
See Fig.12 and 13.
B
A
M ETAL DUCT
M INIMUM
18’’ (0.5 M )
A+B=
NOT LESS
THAN 10’ (3.1 M )
A12292
Fig. 12 - Method 1: Return-Supply
M INIMUM
3’ (0.9 M )
A+B=
NOT LESS
THAN 10’ (3.1 M )
B
A
A12293
Fig. 13 - Method 2: Return- Return
STALE AIR INTAKE:
SCut an opening into the furnace return duct not less than 10 feet
(3.1 m) from the furnace.
SConnect this opening to the stale air intake port of the HRV/ERV
(as shown above).
FRESH AIR DISTRIBUTION:
Same instructions as for Method 1 or Method 2.
IMPORTANT: If using Method 2, make sure the furnace blower
operation is synchronized with the unit operation!
For Method 2 (Return-Return), make sure there is a distance of at
least 3 feet (0.9 m) between the 2 connections to the furnace duct.
NOTE: For Method 1, it is not essential to synchronize the
furnace blower operation with the HRV/ERV operation, but we
recommend it.
Connecting the ducts to the unit
IMPORTANT: If ducts have to go through an unconditioned
space (e.g.: attic), always use insulated ducts.
INSULATED FLEXIBLE DUCTS
Use the following procedure for connecting the insulated flexible
duct to the ports on the unit (exhaust to outside and fresh air from
outside).
1. Pull back the insulation to expose the flexible duct.
2. Install good quality aluminum duct tape to prevent potential
water leakage from duct.
3. Attach the flexible duct to the port using tie wrap.
4. Pull the insulation over the joint and tuck it between the in-
ner and outer rings of the double collar.

7
132 4 5
VJ0091
± 1"
T IE WRAP ON DUCT TAPE
CONNECTING THE UNIT TO THE INSULATED FLEXIBLE DUCTS
THE FLEXIBLE DUCT CONNECTED TO THE EXHAUST TO OUTSIDE PORT SHOULD DROP 1"
BELOW THE PORT BEFORE GOING BACK UP .
A LUMINUM DUCT TAPE ON
FLEXIBLE DUCT
P LACE FLEXIBLE DUCT OVER
INNER PORT RING
I NSULATION TUCKED BETWEEN
INNER AND OUTER RINGS
V APOR - BARRIER AND PORT
STRAP OVER THE OUTER RING
A12562
Fig. 14 - Rigid Ducts
5. Pull down the vapor barrier (shaded part in Fig. 14 over the
outer ring to cover it completely. Fasten in place the vapor
barrier using the port strap (included in unit parts bag). To
do so, insert one collar pin through vapor barrier and first
strap hole, then insert the other collar pin through vapor bar-
rier and center strap hole and close the loop by inserting the
first collar pin in the last strap hole.
IMPORTANT: Make sure the vapor barrier on the insulated ducts
does not tear during installation to avoid condensation within the
ducts.
Use duct tape to connect the rigid ducts to the ports.
IMPORTANT: Do not use screws to connect rigid ducts to the
ports.
Make sure that both balancing dampers are left in a fully open
position before connecting the ducts to these ports (Fresh air to
building port and Exhaust air from building port as shown in
Fig. 15.
A12295
Fig. 15 - Opened Balancing Dampers
Installing the Exterior Hoods
Choose an appropriate location for installing the exterior hoods:
SAt a minimum distance of 6 feet (1.8 m) between the hoods to
avoid cross- contamination
SAt a minimum distance of 18 inches (457 mm) from the ground
IMPORTANT: Make sure the intake hood is at least 6 feet (1.8 m)
away from any of the following:
SDryer exhaust, high efficiency furnace vent, central vacu-
um vent
SGas meter exhaust, gas barbecue- grill
SAny exhaust from a combustion source
SGarbage bin and any other source of contamination
Refer to Fig. 16 For connecting the insulated duct to the hoods. An
“Anti-Gust Intake Hood” should be installed in regions where a lot
of snow is expected to fall.
Exhaust hood
Intake hood
Optional
duct location
Tape and duct tie
18-in
(457 mm) 6-ft
(1.8 m)
6-ft
(1.8 m)
18-in
(457 mm)
A11206
Fig. 16 - Exterior Hoods

8
Connecting the Drain (HRV Units Only)
Cut 2 sections of the plastic tube, about 12-in (305 mm) long, and
attach them to each inner drain fitting, located under the unit. Join
both short sections to the “T” junction and main tube as shown in
Fig. 17.
± 12"
(± 305 mm)
± 12"
(± 305 mm)
A12297
Fig. 17 - Connecting the drain
Make a water trap loop in the tube to prevent the unit from drawing
unpleasant odors from the drain source. Make sure this loop is
located OVER the “T” as shown in Fig. 18. Run the tube to the
floor drain or to an alternative drain pipe or pail.
IMPORTANT: If using a pail to collect water, locate the tube end
approximately 1- in from the top of the pail in order to prevent
water from being drawn back up into the unit.
8" M AX .
± 1”
10" M IN .
T IE WRAP
A12566
Fig. 18 - Water Trap
Insert both drain plugs (included in parts bag) in alternate drain
fittings located on top of the unit. See Fig. 19.
A12299
Fig. 19 - Drain Plugs
Integrated Control
All units are equipped with an integrated control, located in front
of the electrical compartment. See Fig. 20. Use the push button (1)
to control the unit. The LED (2) will then show on which mode the
unit is in.
1 Push Button
2
A12300
Fig. 20 - Integrated Control
NOTES:
1. The integrated control must be turned OFF to use an option-
al main control.
2. If an optional auxiliary control is used, if activated, this aux-
iliary control will override the optional main control.
Refer to table below to see how to operate the unit using its
integrated control.
PRESS ON PUSH
BUTTON LED COLOR RESULTS
Once Amber Unit is on Low
Speed
Twice Green Unit is on High
Speed
Three Times No Light Unit is
OFF
If a problem occurs during the unit operation, its integrated control
LED (2) will blink. The color of the blinking light depends on the
type of error detected. Refer to Troubleshooting Table for further
details.
Boot Sequence
The unit boot sequence is similar to a personal computer boot
sequence. Each time the unit is plugged after being unplugged, or
after a power failure, the unit will perform a 30-second booting
sequence before starting to operate. During the booting sequence,
the integrated control LED will light GREEN (unit set in normal
defrost) or AMBER (unit set in extended defrost) for 5 seconds,
and then will shut off for 2 seconds. After that, the LED will light
RED for the rest of the booting sequence. During this RED light
phase, the unit is checking and resetting the motorized damper
position. Once the motorized damper position completely set, the
RED light turns off and the booting sequence is done.
NOTE: No command will be taken until the unit is fully booted.
Setting Extended Defrost
The unit is factory set to normal defrost. In cold region, it may be
necessary to setup extended defrost. During the first 5 seconds of
booting sequence, while the integrated control LED is GREEN,
press on push button until the LED turns AMBER (about 3
seconds). See Fig. 21.

9
A12301
Fig. 21 - Setting Extended Defrost
IMPORTANT: When installed in reverse position (upside down)
in a cold region where outside temperature could drop below
-20_C(-4_F) for more than 5 days in a row, the unit must always
be set in extended defrost.
Electrical Connection to Optional Wall Control
For more convenience, this unit can also be controlled using an
optional main wall control.
IMPORTANT: Always disconnect the unit before making any
connections. Failure in disconnecting power could result in
electrical shock or damage of the wall control or electronic module
inside the unit.
IMPORTANT: Never install more than one optional main wall
control per unit. Make sure that the wires do not short- circuit
between themselves or by touching any other components on the
wall control. Avoid poor wiring connections. To reduce electrical
interference (noise) potential, do not run wall control wiring next
to control contactors or near light dimming circuits, electrical
motors, dwelling/building power or lighting wiring, or power
distribution panel.
Use the terminal connector included in the installation kit to
perform the electrical connection for main and optional wall
controls. Check if all wires are correctly inserted in their
corresponding holes in the terminal block. (A wire is correctly
inserted when its orange receptacle is lower than another one
without wire. Refer to Fig. 22, wire A is correctly inserted, but not
wire B.)
AB
12
A11211
Fig. 22 - Terminal Connector
Once the wall control(s) connections have been made, insert the
terminal connector in the electrical compartment front face.
NOTE: For information about the operation of the wall controls,
refer to the user guide.
T ERMINAL
CONNECTOR
LOCATION
A12296
Fig. 23 - Terminal Connector
Electrical connection to OneTouch (all units).
NO C NC I OC OL Y R G B
BG
OC
MAIN WALL
CO
NTR
O
L
G B
Y
A12302
Fig. 24 - OneTouch Connection
Electrical Connection to main wall control (all units).
NO C NC I OC OL Y R G B
--5°C
23° F
5°C
41°F
C
O
M
F
O
R
T
Z
O
N
E
-20°C
-4°F
OFF MIN MAX
#
X
X
X
X
X
0
1
/
9
8
A12303
Fig. 25 - Main Wall Control

10
Electrical Connection to Optional Auxiliary Wall Controls
NO C NC I OC OL Y R G B
PUSH-BUTTON TIMERS
(5 MAXIMUM)
60-MINUTE
CRANK TIMER
DEHUMIDISTAT
A12304
Fig. 26 - Optional Auxiliary Wall Controls
NOTE: If an optional auxiliary wall control is activated and then, the Dehumidistat is being activated, this one will override the auxiliary
wall control commands.
Table 1 – Basic Control
MODE OPERATION DAMPER
POSITION
FAN
SPEED
Off Off Closed to outside Off
Low Air exchange with outside Open to outside Low
High Air exchange with outside Open to outside High
Table 2 – OneTouch Push Button Control
MODE OPERATION DAMPER
POSITION
FAN
SPEED
Off Off Closed to outside Off
Low Air exchange
with outside Open to outside Low
Intermittent
40 min off
20 min
exchange low speed
Air exchange
with outside
Open to outside 20 min
Closed 40 min
Low
Off
High Air exchange
with outside Open to outside High
Table 3 – Compatible Optional Auxiliary Wall Controls According to Unit
DEHUMIDISTAT
60- minute crank timer
20- minute lighted push- button switch (5 max.)
Table 4 – Standard Control
MODE DEHUMIDISTAT
POSITION OPERATION DAMPER POSITION FAN SPEED ON LED AIR EXCHANGE LED
Off Any Off Closed to outside Off Off Off
Low Satisfied Air exchange
with outside Open to outside Low
On
On
Call for dehumidification High On
Intermittent
40 min off
20 min
exchange low
speed
Satisfied Off 40min
Low 20 min
Closed to outside/
open Off/Low Off
Call for dehumidification Air exchange
with outside Open to outside High On

11
W R G Y
W
R
G
C
Y
UNIT TERMINAL CONNECTOR
THERMOSTAT
TERMINALS
FOUR
WIRES
TWO WIRES
heating only
FURNACE
24-VOLT
TERMINAL BLOCK TWO WIRES COOLING SYSTEM
NO C NC I OC OL Y R G B
WRGY
W
R
Y
R
G
Y
C
THERMOSTAT
TERMINAL
4 WIRES
2 WIRES
heating only wiring
nuts
FURNACE
24-VOLT
TERMINAL BLOCK 2 WIRES COOLING SYSTEM
NO
NC
C
UNIT TERMINAL CONNECTOR
NO C NC I OC OL Y R G B
Standard furnace interlock wiring Alternate furnace interlock wiring
A11215
Fig. 27 - Interlock Wiring
ELECTRIC CONNECTION TO THE
FURNACE
IMPORTANT: Never connect a 120-volt AC circuit to the
terminals of the furnace interlock (standard wiring). Only use the
low voltage class 2 circuit of the furnace blower control.
For a furnace connected to a cooling system
On some older thermostats, energizing the “R” and “G” terminals
at the furnace has the effect of energizing “Y” at the thermostat and
thereby turning on the cooling system. If you identify this type of
thermostat, you must use the ALTERNATE FURNACE
INTERLOCK WIRING.
OPERATING THE HRV WITH THE
EVOLUTION AND INFINITY CONTROL
The ventilator has four settings in heating mode and three settings
in cooling mode.
Heating:
AUTO - the ventilator selects the speed based on indoor humidity
and outdoor temperature. It may cycle on/off every 30 minutes
depending on humidity and outside temperature.
LOW - low speed all of the time.
HIGH - high speed all of the time.
DEHUM - will only turn on if humidity is 3% over setpoint. The
speed is determined by indoor humidity and outdoor temperature.
Cooling:
AUTO - the ventilator selects the speed based on indoor humidity
and outdoor temperature. It may cycle on/off every 30 minutes
depending on humidity and outside temperature.
LOW - low speed all of the time.
HIGH - high speed all of the time.
If the fan speed is set to Auto and the ventilator wants to run, the
fan speed will run at High continuous speed. Otherwise, the fan
will stay at the chosen continuous fan speed.
Wiring
Remove top cover assembly from wall control and pass thermostat
wire through hole located on back of control before attaching to
wall. Connect Y, R, G, and B (yellow, red, green and black)
between wall control and HRV circuit board. Following color code
(see Fig. 28 and Fig. 29). Replace top cover assembly.
NOTE: HRV wall control and circuit board operate on 12vdc.
YELLOW
YR GB
RED
GREEN
BLACK
A98383
Fig. 28 - Typical Wall Control
% D´HUMIDITE RELATIVE HUMIDITY
´
% HUM. RELATIVE HUM.
55%
45%
35%
30%
EXT. TEMP. EXT.
MODE
MAINTENANCE
AIR EXCHANGE
ECHANGE D´AIR
´
20
25
30
40
50
60
70
80
10C/50F
0C/32F
–10C/14F
–20C/–4F
CONTROL
CONNECTOR
WALL CONTROL
YELLOW
RED
GREEN
BLACK
A98410
Fig. 29 - Control Connections

12
Defrost Cycles Tables
Table 5 – HRVXXLHB1150
OUTSIDE TEMPERATURE DEFROST CYCLES (MINUTES) EXTENDED DEFROST CYCLES
Celsius (_C) Fahrenheit (_F) Defrosting
Operation Time
Between Each
Defrost Cycles
Defrosting
Operation Time
Between Each
Defrost Cycles
-5 23 750 10 30
-15 5 7 25 10 20
-27 -17 10 20 10 15
Table 6 – HRVXXLHB1250
OUTSIDE TEMPERATURE DEFROST CYCLES (MINUTES) EXTENDED DEFROST CYCLES
Celsius (_C) Fahrenheit (_F) Defrosting
Operation Time
Between Each
Defrost Cycles
Defrosting
Operation Time
Between Each
Defrost Cycles
-5 23 650 10 30
-15 5 6 25 10 20
-27 -17 10 20 10 15
AIRFLOW BALANCING
What You Need to Balance the Unit
SA magnehelic gauge capable of measuring 0 to 0.5 inch of water
(0 to 125 Pa) and 2 plastic tubes.
SThe balancing chart of the unit.
Preliminary Stage to Balance the Unit
SSeal all the unit ductwork with tape. Close all windows and doors.
STurn off all exhaust devices such as range hood, dryer and
bathroom fans.
SMake sure the integrated balancing dampers are fully open.
SMake sure all filters are clean (if it is not the first time the unit is
balanced).
Balancing Procedure
1. Set the unit to high speed.
Make sure that the furnace/air handler blower is ON if the
installation is in any way connected to the ductwork of the
cold air return. If not, leave furnace/air handler blower OFF.
If the outside temperature is below 0_C/32_F, make sure the
unit is not running in defrost while balancing. (By waiting
10 minutes after plugging the unit in, you are assured that
the unit is not in a defrost cycle.)
2. Place the magnehelic gauge on a level surface and adjust it
to zero.
A11217
Fig. 30 - Magnehelic Gauge
A12307
Fig. 31 - Open Balancing Damper
3. Connect tubing from gauge to EXHAUST air flow pressure
taps (see diagram at right). Be sure to connect the tubes to
their appropriate high/low fittings. If the gauge drops below
zero, reverse the tubing connections.
NOTE: It is suggested to start with the exhaust air flow
reading because the exhaust has typically more restriction
than the fresh air, especially in cases of fully ducted installa-
tions or source point ventilation.
Place the magnehelic gauge upright and level. Record equi-
valent AIR FLOW of the reading according to the balancing
chart.
4. Move tubing to FRESH air flow pressure taps (see dia-
gram). Adjust the fresh air balancing damper until the
FRESH air flow is approximately the same as the EX-
HAUST air flow. If FRESH air flow is less than EXHAUST
air flow, then go back and adjust the exhaust balancing
damper to equal the FRESH air flow.
5. Secure both dampers in place with a fastening screw.
6. Write the required air flow information on a label and stick
it near the unit for future reference (date, maximum speed
air flows, your name, phone number and business address).
7. Install 4 pressure taps plugs (included in parts bag).
NOTES:
1. Use conversion chart provided with the unit to convert mag-
nehelic gauge readings to equivalent cfm values.
2. The unit is considered balanced even if there is a difference
of 10 cfm (or 5 l/s or 17 m3/h) between the two air flows.
E XHAUST AIR FLOW
F RESH AIR FLOW
A12305
Fig. 32 - Balancing Procedure

13
Field wiring
remote control
(see notes 3 & 4)
120 V, 60 Hz
W1
J6
J4
ELECTRONIC
ASSEMBLY
1
2
1 2 3
1
234
12
12345
12345
J8
J9
J11
J10
12
J12
J13
J14
10
9
8
7
6 5
4
3
2
1
B
24 V class 2
9.5 V
class 2
120V, 60Hz
Neutral
120 V, 60Hz
Line
CPU
K2
K4
K5
J10-2
Line voltage factory wiring
Class 2 low voltage factory wiring
Class 2 low voltage field wiring
See note 1
120 V
Door interlock switch
(magnetically actuated
1234512
12
J3
J2 J1
t˚
Damper motor
BK
Override
switch
Furnace blower interlock
J14-1 : NO
J14-2 : COM J14-3 : nc
(optional; see notes 3, 5)
DAMPER
ELECTRONIC ASSEMBLY
Defrost
temperature sensor
WIRING DIAGRAM LOGIC DIAGRAM
J4-1 J4-3 J6-2 J6-1
K3
K2
24 V
class 2
9.5 V
class 2
120 V
J9-1
J9-2
J9-3
J4-2
J9-4
J8-1
J8-2
J8-4 J8-5
K4
J12-2 J12-1
A1
Damper motor
J3-2 J3-1
J2-2
J2-1
F1
J12-5 J12-4
J12-3 J2-3
J2-4 J2-5
Door interlock switch
J11-2 J11-1
K1
K3
K5 J14-3
J14-1
J14-2
Furnace blower
interlock
(optional; see notes 3, 5)
J14-4
J14-5
J14-6 J14-7 J14-8 J14-9
J14-10
Override switch (optional; see notes 3, 4) Field wiring
remote control (see
notes 3, 4)
ICP
BK
Y
R
G
W W
nc
Motor
capacitor
Fan
motor
GN
GN
BN
BN
Y
Y
BK W
A2
A2
M3
T1
S1
R1
A1
F1
M1
(optional; see
notes 3 & 4)
COLOR CODE
BK BLACK BL BLUE
BN BROWN
GY GRAY GN GREEN
Critical characteristic.
reed switch)
JU1
3
2
1
NOTES
1. For continued fire protection. Use specified
UL listed/CSA Certified line fuse.
2. If any of the original wire, as supplied, must
be replaced, use the same equivalent wire.
3. Field wiring must comply with applicable
codes, ordinances and regulations.
4. Remote controls (class 2 circuit) available,
see instruction manual.
5. Furnace fan circuit must be class 2 circuit only.
J10-1
nc nc nc
nc
2
21
1
BK
BK
W
W
C1
2
21
13
3
BK BK
nc
2
21
13
3
4
4
5
5
6
6
ncnc
BN BN
GN
GND
HI
COM
LO
MED
O
O ORANGE
R RED WWHITE Y YELLOW nc no connection
GY
R
BL nc
BK
BK
O
GY
R
BN
BN
nc
nc
JU1
H
M
213
Fan
motor capacitor
COM
HI LOW
MED
HI
LOW
Fan
motor
A12306
Fig. 33 - Wiring Diagram

14
CARE AND MAINTENANCE
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury
or death.
Before installing or servicing system, always turn off, tag and
lockout main power to system. There may be more than 1
disconnect switch.
!WARNING
CUT HAZARD
Failure to follow this caution may result in personal injury.
Sheet metal parts may have sharp edges or burrs. Use care
and wear appropriate protective clothing and gloves when
handling parts.
CAUTION
!
Door
HRV door can be removed by unlatching brief case style latches,
then slide door to the right and remove it from hinges. Door must
be in place and secured shut for proper operation.
Filter
Filters in HRV are washable and should be cleaned every 3
months. Use a vacuum cleaner to remove heaviest portion of
accumulated dust, then wash in lukewarm water. Allow filter to
completely dry before reinstalling. A dirty air filter will cause
excessive strain on blower motor. Never operate unit without a
filter. Vacuum out debris.
In addition, regularly check and clean screens on exterior intake
and exhaust hoods when necessary.
UNIT COMPONENT DAMAGE HAZARD
Failure to follow this caution may result in unit component
damage.
DO NOT clean filters in a dishwasher and DO NOT dry them
with a heating appliance or permanent damage will result.
CAUTION
!
Blower Motor and Wheel
HRV blower motors are factory lubricated for life. Lubricating
bearings is not recommended. However, inspect and clean any
accumulated dirt and grease from blower motor and wheel
annually.
Cleaning the Core
HRV unit is equipped with special heat recovery core and must be
handled with care. We recommend that it be washed once a year
following the season of most intense use. This will ensure
maximum efficiency of the plastic partitions within the core.
Allow heat recovery core to soak for 3 hours in a solution of warm
water and mild soap. Rinse under stream of water. Hot water and
strong detergent will damage core and should NOT be used.
TROUBLESHOOTING
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury
or death.
Before installing or servicing system, always turn off, tag and
lockout main power to system. There may be more than 1
disconnect switch.
!WARNING
CUT HAZARD
Failure to follow this caution may result in personal injury.
Sheet metal parts may have sharp edges or burrs. Use care
and wear appropriate protective clothing and gloves when
handling parts.
CAUTION
!
NOTE: Reference Table 7 Troubleshooting Chart
This can be a quick guide in resolving unit problems. It is also
recommended to review and understand Wall Control Board
Operation and Care and Maintenance sections before continuing.
There are 3 main parts to focus on when troubleshooting HRV
unit: wall control, electronic control board and blower motor.
Wall Control
Typically, the wall control is either good or it is bad. Use Table 1,
2, or 4 to determine if wall control is operating correctly. Use Fig.
28 to check control wire connections.
NOTE: The electronic control board and wall control operate on
12vdc.
Control Board
In addition, outside air thermistor must be connected to control
board for it to operate properly. See Table 9, Temperature/Ohm
Relationship, for valid temperature range.
Blower Motor
The HRV blower motor operates on 115VAC, with 2- speed
operation.
The easiest way to check blower speed operation is to use the
integrated control and initiate a low- speed blower (amber LED)
and high- speed blower operation (green LED).
NOTE: If there is a short circuit or an open circuit at thermistor,
CPU will go into a 10 minute defrost cycle every 20 minutes.

15
Table 7 – Troubleshooting
If the integrated control LED of the unit is flashing, this means the unit sensors detected a problem. See the list below to know where on the
unit the problem occurs.
LED flashes GREEN
(double blink).
SThermistor error. Replace the thermistor kit
LED flashes AMBER. SDamper error. Go to Problem 6 below.
IMPORTANT: A few diagnosis procedures may require the unit to be in operation while proceeding. Open the unit door and bypass its
magnetic switch by putting the door white magnet on it. Be careful with moving and/or live parts.
PROBLEMS POSSIBLE CAUSES YOU SHOULD TRY THIS
1. Unit does not work
(no LED is lit on the
integrated control).
SThe transformer may be defective.
SThe circuit board may be defective.
SCheck for 24 VAC on J8-1 and J8-2.
SUnplug the unit. Disconnect the main
control and the optional control(s) (if need
be). Jump G and B terminals. Plug the unit
back and wait about 10 seconds. If the
motorsrunonhighspeedandthedamper
opens, the circuit board is not defective.
NO C NC I OC OL Y R G B
SThe unit is unplugged. SPlug the unit.
SThe unit door is opened. SClose unit door
SAfuseisblown. SInspect fuse on circuit board.
SWrong control connections. STry the integrated control.
2. The damper actuator
does not work or ro-
tates continuously.
SThe damper actuator or the integrated
damper port mechanism may be
defective (integrated control LED
flashes AMBER and unit is OFF).
SUnplug the unit. Disconnect the main control and the optional controls(s) (if need
be).Wait 10 seconds and plug the unit back. Check if the damper opens. If not,
use a multimeter and check for 24VAC on J12-1 and J12-2 (in electrical
compartment). If there is 24VAC, replace the entire port assembly.
NOTE: It is normal to experience a small delay (7-8 seconds) before detecting
the 24VAC signal at starting-up. This signal will stay during 17-18 seconds
before disappearing.
SThe circuit board or the transformer may
be defective(integrated control LED
flashes AMBER and unit is OFF) .
SIf there is no 24VAC, check for 24VAC between J8-1 and J8-2. If there is
24VAC, replace the circuit board, and if there is no 24VAC, change the
transformer.
3. The wall control does
not work OR its in-
dicator flashes.
SThe wires may be in reverse position. SEnsure that the color coded wires have been connected to their work OR its
indicator flashes. appropriate places.
SThe wires may be broken. SInspect every wire and replace any that are damaged.
SThe wire in the wall OR the wall. SRemove the wall control and test it right beside the unit using another control
may be defective. shorter wire. If the wall control works there, change the wire. If
it does not, change the wall control.
4. The dehumidistat
does not work OR
the push button timer
does not work OR its
indicator light does
not stay on.
SThe wires may be in reverse position. SEnsure that the color coded wires have been connected to their appropriate
places.
SThe dehumidified or push button may be
defective.
SJump the OL and OC terminals. If the unit
switches to high speed, remove the
dehumidistat or push button and test it right
beside the unit using another shorter wire.If
it works here, change the wire. If it doesn’t,
change the dehumidistat or the push button.
NO C NC I OC OL Y R G B
5. The motor does not
work.
SThe circuit board may be defective. SPress on the integrated control push button until the unit turns on low speed (the
LED will light AMBER). Using a multimeter, check the voltage on J9-4 and
J9-3. Refer to Wiring Diagram. The reading must be 120 VAC. Then set the unit
on high speed by pressing on the integrated control push button one more time
(the LED will light GREEN). Using a multimeter, check the voltage on J9-4 and
J9-2. The reading must be 120 VAC Check also between J4-2 and J4-1, the
reading must be 120 VAC Referto Wiring Diagram. Check if the fuse F1 is intact.
If all the readings correspond to the right voltage values, the circuit board is not
defective. If one or both readings are different, change the circuit board.
SThe motor may be defective. SUsing a multimeter, check for 120VAC for the following speeds: High Speed:
between GREY and ORANGE wires; Low/Medium Speed: between GREY and
RED/BLUE wires. Refer to the Wiring Diagram.
SThe motor capacitor may be defective. SUnplug the unit. Check for continuity between Pin 5 on the 6-pin connector
(brown leads) and Pin 3 of the capacitor connector. Also check for continuity
between Pin 4 on the 6-pin connector (brown leads) and Pin 1 of the capacitor
connector. Refer to Wiring Diagram.
SThe motor is unplugged from inside the
unit.
SOpen the door and ensure that the wire going to the motor is connected.
SThe motor is unplugged from the
electronic board (J4).
SCheck J4 motor connection on circuit board.
SThere is a problem with the door magnet
switch.
SDoor magnet switch is missing or not in its place.
SJU-1 jumper is missing or in wrong
position
SEnsure JU-1 jumper is set on “M” speed.

16
PROBLEMS POSSIBLE CAUSES YOU SHOULD TRY THIS
6. The defrost cycle
does not work (the
fresh air duct is
frozen OR the fresh
air distributed is very
cold).
SIce deposits may be hindering the
damper operation.
SRemove the ice.
SThe damper rod or the port damper itself
may be broken.
SInspect these parts and replace if necessary.
SThe damper actuator or circuit board
may be defective.
SSee Problem 2.
7. The integrated con-
trol push button does
not work.
SThe 30-second boot sequence is not
completed.
SSee Boot Sequence.
SThe circuit board may be defective. SCheck voltage going to circuit board J8- 1 and J8-2.
SThe transformer may be defective SCheck for 24 VAC on J8-1 and J8-2.
To prevent interior condensation on windows, do not exceed the humidity levels shown in Table 8.
Table 8 – Recommended Humidity Levels
OUTSIDE TEMPERATURE DOUBLE- PANE WINDOWS TRIPLE - PANE WINDOWS
50F/10C55% 65%
32F/0C45% 55%
14F/- 10C35% 45%
-4F/- 20C30% 45%
-22F/- 30C25% 35%
Table 9 – Temperature/Ohm Relationship
TEMP.
(F/ 5C) (k Ohms) TEMP. (F/ 5C) (k Ohms) TEMP. (F/ 5C) (k Ohms) TEMP. (F/ 5C) (k Ohms) TEMP. (F/ 5C) (k Ohms)
- 58/- 50 329.5 0/- 18 61.54 55/13 15.90 112/44 5.080 167/75 1.924
- 56/- 49 310.9 1/- 17 58.68 57/14 15.28 113/45 4.911 169/76 1.869
- 54/- 48 293.5 3/- 16 55.97 59/15 14.69 114/46 4.749 171/77 1.816
- 52/- 47 277.2 5/- 15 53.41 61/16 14.12 116/47 4.593 172/78 1.765
- 51/- 46 262.0 7/- 14 50.98 63/17 13.58 118/48 4.443 174/79 1.716
- 49/- 45 247.7 9/- 13 48.68 64/18 13.06 120/49 4.299 176/80 1.668
- 47/- 44 234.3 10/- 12 46.50 66/19 12.56 122/50 4.160 178/81 1.622
- 45/- 43 221.7 12/- 11 44.43 68/20 12.09 124/51 4.026 180/82 1.577
- 44/- 42 209.9 14/- 10 42.47 70/21 11.63 126/52 3.896 181/83 1.533
- 43/- 41 198.9 16/- 9 40.57 72/22 11.20 128/53 3.771 183/84 1.492
- 40/- 40 188.5 18/- 8 38.77 73/23 10.78 129/54 3.651 185/85 1.451
- 38/- 39 178.5 19/- 7 37.06 75/24 10.38 131/55 3.536 187/86 1.412
-36-38 169.0 21/- 6 35.44 77/25 10.00 133/56 3.425 189/87 1.373
- 34/- 37 160.2 23/- 5 33.90 79/26 9.632 135/57 3.318 191/88 1.336
- 32/- 36 151.9 25/- 4 32.44 81/27 9.281 137/58 3.215 192/89 1.301
- 30/- 35 144.1 27/- 3 31.05 82/28 8.944 138/59 3.116 194/90 1.266
- 28/- 34 136.7 28/- 2 29.73 84/29 8.622 140/60 3.020 196/91 1.232
- 27/- 33 129.8 30/- 1 28.48 86/30 8.313 142/61 2.927 198/92 1.200
- 26/- 32 123.3 32/0 27.28 88/31 8.014 144/62 2.838 199/93 1.168
- 24/- 31 117.1 34/1 26.13 90/32 7.728 145/63 2.751 201/94 1.137
- 22/- 30 111.3 36/2 25.03 92/33 7.454 147/64 2.668 203/95 1.108
- 20/- 29 105.7 37/3 23.99 94/34 7.192 149/65 2.588 205/96 1.079
- 18/- 28 100.5 39/4 23.00 96/35 6.940 151/66 2.511 207/97 1.051
- 16/- 27 95.52 41/5 22.05 98/36 6.699 153/67 2.436 208/98 1.024
- 14/- 26 90.84 43/6 21.15 99/37 6.467 155/68 2.364 210/99 0.9984
- 12/- 25 86.43 45/7 20.30 100/38 6.245 156/69 2.295 212/100 0.9731
- 10/- 24 82.26 46/8 19.48 102/39 6.032 158/70 2.228 214/101 0.9484
-9/-23 78.33 48/9 18.70 104/40 5.827 160/71 2.163 216/102 0.9246
-8/-22 74.61 50/10 17.96 106/41 5.629 162/72 2.100 217/103 0.9014
-6/-21 71.10 52/11 17.24 108/42 5.438 164/73 2.039 219/104 0.8789
-4/-20 67.77 54/12 16.56 110/43 5.255 165/74 1.980 221/105 0.8572
-2/-19 64.57
Copyright 2012 Carrier Corp. S7310 W. Morris St. SIndianapolis, IN 46231 Edition Date: 11/12
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Catalog No: IM- HRVLHB- 01
Replaces:NEW