TOTALINE TOTALINE P707 User manual

Manufacturer reserves the right to
discontinue, or change at any time,
specifications or designs without notice
and without incurring obligations.
REPLACEMENT COMPONENTS DIVISION LITERATURE NUMBER P707-5SI
© CARRIER CORPORATION 2004 4-04 REPLACES: New
PRINTED IN U.S.A. CATALOG NUMBER 570-332
Part Numbers P707-SHR1504 and 2004
CONTENTS
SAFETY CONSIDERATIONS ......................1
GENERAL ........................................1
INSTALLATION ................................ 2-10
Step 1 — Unit Location...........................2
Step 2 — Unit Mounting .......................... 2
Step 3 — Install Drain Line .......................3
Step 4 — Locate and Install Weather Hoods...... 3
Step 5 — Install Ducting To Weather Hood
Location .......................................3
Step 6 — Install Indoor Ductwork System ........4
• SUPPLY AIR DUCTING
• EXHAUST AIR DUCTING
• INSTALL DUCTING
• INSTALLATION EXAMPLES
Step 7 — Airflow Balancing ......................6
• AIRFLOW STATION METHOD
• PITOT TUBE BALANCING PROCEDURE
• BALANCING DAMPER ADJUSTMENT
Step 8 — Install Accessories .....................9
Step 9 — Electrical Connection to Furnace
(Air Systems Directly Connected to Furnace) ..9
OPERATION...................................10,11
Winter...........................................10
Spring...........................................10
Summer.........................................10
Fall ..............................................10
Modes of Operation .............................10
• CONTINUOUS/VENTILATION MODE
• INTERMITTENT/STANDBY MODE
• DEFROST (FAN SHUTDOWN)
MAINTENANCE ................................. 11
Motor ........................................... 11
Chassis ......................................... 11
Condensation Panel............................. 11
Drain and Drain Line ............................ 11
Outside Hoods .................................. 11
Filters ........................................... 11
Heat Recovery Core ............................. 11
TROUBLESHOOTING............................12
SAFETY CONSIDERATIONS
Installing, starting up, and servicing ventilation equipment
can be hazardous due to system pressures, electrical compo-
nents and equipment location (roofs, elevated structures, etc.).
Only trained, qualified installers and service mechanics should
install, start up, and service this equipment.
When working on the equipment, observe precautions in the
literature and on tags, stickers, and labels attached to the
equipment. Follow all safety codes.
GENERAL
The P707-SHR1504 and P707-SHR2004 Heat Recovery
Ventilators (HRV) are used to exchange indoor stale air with
outside fresh air. The HRV unit is equipped with a special ener-
gy recovery core which transfers sensible heat with the fresh
incoming air. The cross-flow design core allows entering and
leaving airstreams to transfer heat energy without mixing.
The HRV is available in 2 sizes with airflow ranges of
150 cfm (SHR1504), and 200 cfm (SHR2004). The design of
this unit is horizontal. Special attention should be given to duct
application, balancing the HRV, and locating unit for easy
access and routine maintenance. See Table 1 and Fig. 1 for
performance data.
Table 1 — Performance Data
Before installation, always check to be sure main power to
systems are OFF. Electrical shock can cause personal
injury or death.
UNIT
APPARENT SENSIBLE
EFFECTIVENESS
AT 32 F (0° C)
APPARENT SENSIBLE
EFFECTIVENESS
AT –13 F (–24 C)
SHR 1504 72% 69%
SHR 2004 71% 76%
INSTALLATION
AND OPERATION
INSTRUCTIONS
P707
Heat Recovery
Ventilator
0
0.2
0.4
0.6
0.8
1
1.2
0
50
100
150
200
250
300
40080
SHR 1504
SHR 2004
120 160
AIRFLOW (CFM)
AIRFLOW (L/S)
STATIC PRESSURE (IN. WG)
STATIC PRESSURE (PA)
200 240
190 38 57 76 94 114
Fig. 1 — Fan Performance

2
INSTALLATION
Step 1 — Unit Location — The HRV must be located
in a heated space where it can be conveniently serviced.
Typically the HRV is located in the mechanical room or an area
close to the outside wall where the weather hoods will be
mounted. If a basement area is not convenient or does not
exist, a utility or laundry room may be used. See Fig. 2 for
dimensions.
Attic installations are not normally recommended due to the
complexity of work to install, freezing conditions in the attic,
and the difficulty of access for service and cleaning.
Connecting appliances to the HRV is not recommended
(such as a clothes dryer, range top, stovetop fan, or central
vacuum system). These appliances may cause lint, dust or
grease to collect in the HRV, damaging the unit.
NOTE: Connecting any of these type of appliances to the
HRV will invalidate the warranty.
Locate the unit close to the outside wall on which the supply
and exhaust hoods will be mounted. There should be a nearby
power supply of 120 volts, 60 Hz available.
There should be access to a water drain for condensate
removal of the unit during defrost.
The unit should be located in a heated area (attic installation
is not recommended). The location should also minimize any
noise level that would be created by the unit in the living area.
Make sure there is adequate access for future maintenance.
Step 2 — Unit Mounting — The unit is typically hung
from the ceiling for mounting. See Fig. 2 for unit dimensions.
Perform the following to mount the HRV:
1. Place fastening hooks on the strapping board or the
floor joists. See Fig. 3.
2. Attach a hanging chain (provided) to each no. 10 3/4-in.
bolts (provided) on the top 4 corners of the unit and
tighten. See Fig. 4.
3. Hang the unit by slipping a link onto the hanging
hooks, making sure the unit is level. Unit condensate
will not drain properly unless unit is level. See Fig. 5.
ABCD
E
OUTDOOR 
INTAKE 
(FRESH AIR)
EXHAUST 
AIR FROM 
INSIDE
FRESH AIR 
TO INSIDE
EXHAUST 
AIR 
(TO OUTSIDE) 6"
Fig. 2 — Unit Dimensions
UNITABCD E
SHR 1504 21/4″(56 mm) 231/2″(596 mm) 25/8″(67 mm) 173/8″(441 mm) 161/8″(413 mm)
SHR 2004 21/4″(56 mm) 277/8″(707 mm) 25/8″(67 mm) 173/8″(441 mm) 201/2″(520 mm)
Fig. 3 — Install Fastening Hooks
Fig. 4 — Install Hanging Chain
Fig. 5 — Unit Mounting

3
Step 3 — Install Drain Line — Through normal op-
eration and during defrost mode, the HRV may produce some
condensation. This water should be directed to flow into a
nearby drain, or be removed by a condensate pump. The HRV
and all condensate lines must be installed in a space where the
temperature is maintained above the freezing point. A P-trap
should be made in the drain line. This will prevent odors from
being drawn back up into the unit.
To install the drain line, install the drain nipple provided.
See Fig. 6.
Install the drain hose onto the drain nipple. Loop the hose to
create a P-trap as shown in Fig. 7. Run the hose to a nearby
drain.
Step 4 — Locate and Install Weather Hoods —
The intake weather hood should be located upstream and at
least 4 to 6 ft away from the exhaust weather hood. The intake
weather hood should be at least 6 ft away from dryer vents and
furnace exhaust (on medium or high efficiency furnaces) and a
minimum of at least 6 ft from driveways, oil fill pipes, gas
meters, or garbage containers.
Locate the hoods at least 18 in. above the ground, or above
the depth of expected snow accumulation. The hoods should be
at least 3 ft from the corner of the building. Do not locate in a
garage, attic or crawl space.
A well designed and installed ducting system will allow the
HRV to operate at its maximum efficiency. Always keep duct
runs as short and straight as possible.
To install the intake and exhaust weather hoods, perform the
following:
1. Using the collar of the outside hood, outline the intake
and exhaust holes to be cut. The hole should be
slightly larger than the collar to allow for the thickness
of the insulated flexible duct. See Fig. 8.
2. Cut a holes using the outline from Step 1. See Fig. 8.
When cutting or drilling holes, be careful not to dam-
age electrical wiring or other hidden objects in wall.
3. Pull the insulated flexible duct through the opening
until it is well extended and straight. Slide the duct
inner vinyl sleeve over the hood collar and secure. See
Fig. 9.
4. Pull the insulation over the duct and then the vapor
barrier over the sleeve and secure with duct tape. See
Fig. 9.
5. Push the hood into the opening. Attach the hood to the
outside wall with mounting screws. See Fig. 10.
6. Using a caulking gun, seal around the hoods to prevent
any leaks. See Fig. 11.
Step 5 — Install Ducting To Weather Hood
Location — The inner liner of the flexible insulated duct
was secured to the intake and exhaust weather hoods in Step 4.
Run the other end of the flexible duct to the HRV installation
location. See Fig. 12.
Clamp the end of the duct to the appropriate port on the
HRV. See Fig. 2.
The insulation should remain full and not be crushed. The
outer liner, which acts as a vapor barrier must be completely
sealed to outer wall and the HRV using tape and/or caulking. A
good bead of high quality caulking (preferably acoustical seal-
ant) will seal the inner flexible duct to both the HRV port and
the weather hood prior to clamping.
To minimize airflow restriction, the flexible insulated duct
that connects the two outside weather hoods to the HRV should
be stretched tightly and be as short as possible. Twisting or
folding the duct will severely restrict airflow.
Fig. 7 — Install P-Trap
Fig. 6 — Install Drain Nipple
Fig. 8 — Cut Holes for Weather Hoods
Fig. 9 — Install Duct and Sleeve
Fig. 10 — Install Hoods

4
Step 6 — Install Indoor Ductwork System — To
maximize airflow in the ductwork system, all ducts should be
kept short and have as few bends or elbows as possible. Forty-
five degree elbows are preferred to 90 degree elbows. Use tees
instead of 90 degree elbows whenever possible.
All duct joints must be fastened with screws or duct sealant
and wrapped with a quality duct tape to prevent leakage.
Aluminum foil duct tape is recommended. Galvanized ducting
from the HRV to the living areas in the house is recommended
whenever possible, although flexible duct can be used in
moderation when necessary.
SUPPLY AIR DUCTING — In homes without a forced air
furnace, fresh air should be supplied to all high-usage rooms
including bedrooms and living areas. Air should be supplied
from high wall or ceiling locations. Grilles that diffuse the air
comfortably are recommended. To avoid possible noise transfer
through the ductwork system, a short length (approximately
12 in.) of nonmetallic flexible insulated duct should be connect-
ed between the HRV and the supply/exhaust ductwork system.
The main supply and return lines to and from the HRV must
be 6 in. minimum. Branch lines to the individual rooms may
be as small as 4 in., but 5 in. lines are preferred. If floor
installation is the only option available, then special care
should be taken in locating grilles. Installation areas, such as
under baseboard heaters, will help to temper the air. In homes
with a forced air furnace, it may be advisable to connect the
HRV to the furnace ductwork (direct connection).
Building Codes and Combustion Appliance Installation
Codes do not allow location of return air grilles or any opening
such as a breathing tee in an enclosed room with spillage
susceptible combustion appliances.
The fresh air inlet from the HRV must be a minimum
distance of 3 ft from the furnace return drop to ensure proper
air mixing and temperature at the furnace core.
Direct Connection — A direct connection requires that the
furnace fan run continuously. See Fig. 13. The fan may be
inter-linked electrically (low voltage) with the HRV accessory
control contacts for intermittent demand.
To hard duct the supply air directly into the cold air return of
the furnace, remember to check the airflow balance of the HRV
with the furnace fan both on and off to determine that it does
not imbalance the HRV more than 10%. Make sure that the
minimum distance from the supply air of the HRV to the
furnace is followed. Refer to the local and National Building
and Heating Codes for any variations in these notes.
EXHAUST AIR DUCTING — The stale air exhaust system
is used to draw air from the points in the house where the worst
air quality problems occur. It is recommended that return air
ducts be installed in the bathroom, kitchen, and laundry room.
Additional return air ducts from strategic locations (i.e., green-
house, atrium, swimming pool, sauna, etc.) may be installed.
The furnace return duct may be also used.
In this method, the exhaust air is not ducted back from
bathrooms, kitchens, etc. to the HRV with dedicated lines.
This method has become popular and provides good
ventilation when installed in accordance with the instructions.
The furnace blower must be running when the HRV is operat-
ing for this method to be effective.
INSTALL DUCTING — To install indoor ductwork, perform
the following:
1. Begin with the duct collar on the HRV marked Exhaust
Air In. Slide a short piece (12-in.) of flexible duct over
the duct collar. Using duct tape, tape the flexible duct
to the collar.
2. Run the flexible ducting to the main rigid duct trunk
line, which connects to the remainder of the ducts
going to and from rooms in the house. Repeat the steps
for the Supply Air Out on the side of the HRV.
3. Working from a closet, attic or inside joist wall, run the
length of ducting required for the proper grille location
and cut a hole in the wall.
4. Fasten the mounting collar (field-supplied) to the duct-
ing and fasten the collar to the wall or ceiling with
screws.
5. The field supplied grille may be adjustable. It is rec-
ommended that the grilles be completely opened at
first and then adjusted later as needed.
6. Push the grille into the mounting collar or directly into
installed elbow.
Fig. 11 — Seal Hoods
Fig. 12 — Outdoor Ducting Installation
FROM HRV
Fig. 13 — Direct Duct Connection

5
INSTALLATION EXAMPLES — It is the responsibility of
the installer to ensure all ductwork is sized and installed as
designed to ensure the system will perform as intended. All air
movement devices have a performance curve. The amount of
air (cfm) that an HRV will deliver is directly related to the total
external static pressure (E.S.P.) of the system. Static pressure is
a measure of resistance imposed on the blower by length of
duct work/number of fittings used in ductwork, duct heater etc.
Fully Dedicated System (New Construction) —Staleairis
drawn from key areas of home (bathroom, kitchen, laundry).
Fresh air is supplied to main living areas. The HRV must be
balanced. See Fig. 14.
Partially Dedicated System — Stale air drawn from key areas
of home (bathroom, kitchen, laundry) Fresh air supplied to
main living areas via the forced air system. HRV must be bal-
anced. See Fig. 15 and 16.
SUPPLY
EXHAUST
BEDROOMS
FRESH AIR
EXHAUST AIR
1800 MM
460 MM
HRV
EXHAUST
BATHROOM
CENTRAL CONTROL 
(OPTIONAL)
FRESH AIR TO 
LIVING ROOM
Fig. 14 — Fully Dedicated System
HRV CONNECTION
BEDROOMS
FRESH AIR
1800 MM
460 MM
HRV
EXHAUST
BATHROOM
CENTRAL CONTROL 
(OPTIONAL)
FURNACE 
THERMOSTAT
EXHAUST AIR
RETURN AIR
TWO SPEED 
FURNACE
MIXED SUPPLY / 
VENTILATION 
AIR
Fig. 15 — Partially Dedicated System

6
Direct Connection of Supply Airstream and Exhaust Air-
Stream to the Furnace Cold Air Return (Return/Return
Method) — The HRV must be balanced. It is mandatory that
the furnace blower run continuously or HRV operation be in-
terlocked with the furnace blower. Check local codes/authority
having jurisdiction for acceptance. See Fig. 17 and 18.
Direct Connection of Both Supply Airstream and Exhaust
Airstream to the Furnace Cold Air Return and Supply Air
Side (Supply/Return Method) — The HRV must be balanced.
It is recommended that the furnace blower run continuously or
HRV operation be interlocked with the furnace blower. Check
local codes /authority having jurisdiction for acceptance. See
Fig. 19 and 20.
Step 7 — Airflow Balancing — If the unit airflows
are not properly balanced then the unit may not operate at max-
imum efficiency and energy recovery core damage may occur.
An improperly balanced unit could cause negative or
positive pressure in the home causing cold air to enter or other
combustible equipment to backdraft. Also, the unit may not
defrost properly.
The balancing procedure consists of measuring the exhaust
air leaving the system and the supply air entering the system
and ensuring that these two are equal. A deviation of 10% or
less is acceptable. In such cases, it is recommended to have a
greater amount of exhaust air than supply which will increase
the supply-air temperature.
AIRFLOW STATION METHOD — To measure airflow with
an airflow station, perform the following:
1. Cut the duct and insert the flow measuring station.
Make sure that the flow measuring station air direction
arrow points in the direction of the airflow. Secure the
flow measuring station with duct tape. See Fig. 21.
2. Before taking the reading, make sure that the Magne-
helic gage is level and at 0. See Fig. 22.
3. Start the HRV and other system devices if applicable
(furnace and air handler) and refer to the flow measur-
ing station chart to determine unit airflow velocity.
4. The airflow is regulated by a balancing damper located
inside the collar of the HRV. Adjust the Supply Air Out
damper until the desired velocity is achieved. See Fig. 23.
5. Adjust the Exhaust Air Out damper in the same
manner.
Fig. 17 — Direct Connection to Furnace
(Return/Return)
FORCED AIR 
FURNACE
COOL AIR 
RETURN
RETURN AIR
1 M 
(3'-3") MIN 
RECOMMENDED
* UNIT IS NORMALLY BALANCED ON HIGH SPEED 
WITH FURNACE BLOWER ON.
OUTDOORS
* DUCTS CONNECTION MAY VARY 
DEPENDING ON MODEL
EXHAUST AIR FROMVARIOUS 
PARTS OF HOME. 
I.E., BATHROOMS (IF REQUIRED) 
KITCHENS (IF REQUIRED)
NOTES:
1. Furnace blower may be required to operate when HRV is on to provide good air distribution.
2. Weather hood arrangement is for drawing purposes only. 6″(2 m) minimum separation recommended. 18″(460 mm) above grade minimum.
3. Due to the differences in pressure between the HRV and the equipment it is being connected to, the HRV’s airflow must be confirmed on site,
using the balancing procedure found in the installation manual.
Fig. 16 — Partially Dedicated System Airflow Diagram

7
PITOT TUBE BALANCING PROCEDURE — The follow-
ing is a method of field balancing an HRV using a Pitot tube.
This is advantageous in situations when flow stations are not
installed in the ductwork. The procedure should be performed
with the HRV on high speed. See Fig. 24.
1. Operate all mechanical systems on high speed which
have an influence on the ventilation system (i.e., HRV,
forced air furnace, or air handler) if applicable. This
will provide the maximum pressure that the HRV will
need to overcome, and allow for a more accurate bal-
ance of the unit.
2. Drill a small hole in the return duct (about 3/16-in.), 3 ft
downstream of any elbows or bends, and 1 ft upstream
of any elbows or bends. These are recommended
distances but the actual installation may limit the
amount of straight duct.
3. The Pitot tube should be connected to a Magnehelic
gage or other manometer capable of reading from 0 to
0.25 in. wg, preferably to 3 digits of resolution. The
tube coming out of the top of the pitot is connected to
the high pressure side of the gage. The tube coming
out of the side of the pitot is connected to the low pres-
sure or reference side of the gage.
4. Insert the pitot tube into the duct; pointing the tip into
the airflow. For general balancing it is sufficient to
move the pitot tube around in the duct and take an
average or typical reading.
5. Repeat this procedure in the supply duct. Determine
which duct has the highest airflow (highest reading on
the gage).
6. Use the HRV dampers to correct the airflow to match
the lower reading from the other duct. The flows
should now be balanced.
7. Actual airflow can be determined from the gage
reading. The value read on the gage is called the veloc-
ity pressure. The pitot tube comes with a chart that will
give the airflow velocity based on the velocity pressure
indicated by the gage. This velocity will be in either
feet per minute or meters per second. To determine
the actual airflow, the velocity is multiplied by the
cross-sectional areas of the duct being measured.
FORCED AIR 
FURNACE
COOL AIR 
RETURN
RETURN AIR
1 M 
(3'-3") MIN 
RECOMMENDED
* UNIT IS NORMALLY BALANCED ON HIGH SPEED 
WITH FURNACE BLOWER ON.
OUTDOORS
* DUCTS CONNECTION MAY VARY 
DEPENDING ON MODEL
40" MIN
NOTES:
1. Furnace blower may be required to operate when ventilation from HRV is required. The furnace should be set to run continuously or inter-
locked with HRV.
2. A minimum separation of 39 inches (1 m) is required between the two direct connections.
3. The exhaust air connection should be upstream of the supply air connection to prevent exhausting any fresh air.
4. Weather hood arrangement is for drawing purposes only. 6′(2 m) minimum separation recommended. 18″(460 mm) above grade minimum.
5. Due to the differences in pressure between the HRV and the equipment it is being connected to, the HRV’s airflow must be confirmed on site,
using the balancing procedure found in the installation manual.
Fig. 18 — Direct Connection to Furnace (Return/Return) Airflow Diagram
Fig. 19 — Direct Connection to Furnace
(Supply/Return)

8
This is an example for determining the airflow in a 6-in.
duct. The pitot tube reading was 0.025 inches of water. From
the chart, this is 640 feet per minute.
The 6-in. diameter duct has cross-sectional area of:
Area = Pi x Radius 2
6-in / 2 = 3-in. radius
3-in. /12 = 0.25 ft radius
A = 3.14 x (0.25)2
A=0.2sqft
The airflow is then:
640 ft/min x 0.2 sq ft = 128 cfm
For convenience, the cross sectional area of some common
round ducts are listed below:
The accuracy of the airflow reading will be affected by how
close to any elbows or bends the readings are taken. Accuracy
can be increased by taking an average of multiple readings.
BALANCING DAMPER ADJUSTMENT — Installation
where the HRV is ducted directly to the return of a furnace may
require additional dampening on the fresh air to building duct.
This is due to the high return static pressures found in some fur-
nace installations.
A butterfly damper is provided for field-installation in the
fresh air to building duct. Install the damper and adjust as
necessary.
DUCT DIAMETER (in.) AREA (sq ft)
50.14
60.20
70.27
80.35
FORCED AIR
FURNACE
COOLAIR
RETURN
RETURN AIR
1 M
(3’-3") MIN
RECOMMENDED
* UNIT IS NORMALLY BALANCED ON HIGH SPEED
WITH FURNACE BLOWER ON.
OUTDOORS
* DUCTS CONNECTION MAY VARY
DEPENDING ON MODEL
1 M
(3’-3") MIN
RECOMMENDED
NOTES:
1. Furnace blower may be required to operate when ventilation from HRV is required. The furnace should be set to run continuously or inter-
locked with HRV.
2. The exhaust air connection should be upstream of the supply air connection to prevent exhausting any fresh air.
3. Weather hood arrangement is for drawing purposes only. 6′(2 m) minimum separation recommended. 18″(460 mm) above grade minimum.
4. Due to the differences in pressure between the HRV and the equipment it is being connected to, the HRV’s airflow must be confirmed on site,
using the balancing procedure found in the installation manual.
Fig. 20 — Direct Connection to Furnace (Supply/Return) Airflow Diagram
.....
Fig. 21 — Secure Airflow Station
Fig. 22 — Magnehelic Gage
Fig. 23 — Adjust Damper Position

9
Step 8 — Install Accessories — Install all accesso-
ries. Field-installed accessories include:
• Remote Intellitek control
• Dehumidistat
• Remote override timer
Refer to the accessory installation instructions for more in-
formation. See Fig. 25 for wiring.
Step 9 — Electrical Connection to Furnace
(Air Systems Directly Connected to Fur-
nace) — When the HRV is directly connected to the
furnace, the furnace may need to be interlocked with the HRV
to provide air circulation for the system. Connect the R and G
terminals on the furnace to the COM and N.O. terminals on the
HRV. See Fig. 26 for a wiring diagram. Never connect a
120-vac circuit to the terminals of the HRV control contacts.
Use only low-voltage furnace blower control contacts.
On some older thermostats, energizing the R and G
terminals at the furnace has the effect of energizing Y at the
thermostat and therefore energizing the cooling system. For
these thermostats, use the alternate control contacts wiring. See
Fig. 27.
Magnehelic
Magnehelic
OUTDOORS PLACE PITOTTUBE A MINIMUM OF 18" FROM BLOWER OR ELBOWS
NOTE: DUCT CONNECTIONS MAY VARY, 
DEPENDING ON MODEL.
MAGNEHELIC 
GAGE
PITOT 
TUBE
PITOT 
TUBE MAGNEHELIC

GAGE
*Pitot tube should be kept at least 12 in. away from fans elbows and dampers to ensure accurate reading.
Fig. 24 — Pitot Tube Balancing
EDF5 (5MR)
OVERRIDE, STAND-BY, CONTINUOUS,
RECIRCULATION & CYCLE/HOUR
2 WIRES
15-MINUTE TIMER
(UP TO 5 TIMERS)
2 WIRES
DEHUMIDISTAT
2 WIRES
DIAGNOSTIC
LED
CUSTOM DEFROST
MODE JUMPER
SELECTION
3 POSITION MODE
SELECTION
SWITCH
ACCESSORY CONTROL CONTACT
(OPEN & CLOSES CONTACT
WHEN HRV IS ON/OFF)
DEHUM.
WALL CTRL
TIMER
+ -
OVERRIDE CONTROLS / CONTR LES DE LADEMANDE
HUMIDITY
HUMIDIT
%
MODE CONTROLS / CONTR LES POUR LES MODES
TIMER/ MIN.
FILTER/ FILTRE
OVERRIDE
ECHANGE
CYCLE
PERHR/ PAR HRE
MODESPEED
VITESSEDU MODE
MODES
POWER
totaline
fi
15 min.
NOTE: A WIRING DIAGRAM OF THE COMPLETE UNIT IS INSIDE ACCESS PANEL
Fig. 25 — Electrical Connections
NOTE: A wiring diagram of the complete unit is inside access panel.

10
OPERATION
The Heat Recovery Ventilator is designed to provide fresh
into a building while exhausting an equal amount of stale air.
During the winter months, the incoming cold fresh air is
warmed by utilizing the energy recovered from the stale air be-
fore it is exhausted to the outdoors. During summer months
when the indoor space is air conditioned, the HRV will help in
cooling the incoming fresh air with the stale air that is being
exhausted.
The HRV is designed to run continuous or on intermittent,
giving the homeowner complete control over their air quality.
Continuous low speed ventilation is recommended, which will
help eliminate carbon dioxide and other gases as well as fresh-
en up the home. Intermittent high speed ventilation can be
obtained through a variety of optional remote controls.
Winter — Humidity control is very important during the
winter months. This is when problems will be most apparent
since condensation on the windows will often occur. The cold-
er the outside temperature, the greater the risk of condensation
in the home. The average relative humidity should be
maintained between (30 and 60%) to avoid condensation. Low
speed continuous ventilation with high speed override is
recommended.
Spring — Temperatures are more moderate and become
warmer each day. To keep the humidity and temperature
uniform, set the dehumidistat higher and the switch on the
HRV to standby.
Summer — The air is sometimes hot and humid. To stop
the warm humid air from entering, set the dehumidistat at its
highest level and the switch on the HRV to standby. If the
Intellitek series controller is installed, the air exchanger can be
stopped at any time by turning the HRV off from the wall
control. However, continuous ventilation is recommended.
Fall — Rain and rapid temperature changes make it difficult
to control the internal humidity level and may result in
condensation on the windows. A remote dehumidistat may
help give greater control over the inside environment.
Modes of Operation — The control board offers stand-
alone operating capabilities as well as an exclusive 2 wire
communication to most external controls. The trouble-free
accessory controls include: a rotary dial dehumidistat, a
15-minute remote push-button timer, as well as the most
sophisticated line of remote wall-mounted controls, the
Intellitek multifunction series.
An on-board diagnostic LED helps find problems quickly
and efficiently. For example, the LED can be used to signal a
broken or shorted electronic wall control wire. An electronic
air temperature probe gives this board accurate readings in
order to minimize unnecessary defrost operation, and the
on-board jumpers provide the user with the option of adjusting
defrosts time and sequence to optimize performance under
abnormal conditions.
W
R
G
C
Y
WRG
Y
THERMOSTAT
TERMINALS
FURNACE
24-VOLT
TERMINAL BLOCK
FOUR
WIRE
TWO WIRE
heating only
TWO
WIRE COOLING SYSTEM
HRV
ELECTRONIC BOARD
-
+
Fig. 26 — Control Contact Wiring
W
R
G
C
Y
WRG
Y
THERMOSTAT
TERMINALS
FURNACE
24-VOLT
TERMINAL BLOCK
FOUR
WIRE
TWO WIRE
heating only
TWO
WIRE COOLING SYSTEM
HRV
ELECTRONIC BOARD
WIRE JOINT
-
+
Fig. 27 — Alternate Control Contact Wiring

11
CONTINUOUS/VENTILATION MODE — In this mode of
operation, both fans are operating and exchanging air with the
outside. The heat recovery ventilator constantly exchanges the
air at the selected rate, either at low or medium speed, and
switches to high speed when activated by an accessory remote
control. The low and medium fan speed selection will cause the
unit to operate in continuous exchange mode at an exchange
rate of 35% and 50% maximum airflow rating respectively.
Continuous mode is recommended, since pollutants are slowly
but constantly being generated in the house. See Fig. 28.
INTERMITTENT/STANDBY MODE — The system is al-
ways on standby and operates at high speed when activated by
an accessory remote control. Standby should be selected if the
user wishes to stop the unit from continuous exchange. It is rec-
ommended that the Standby mode only be used if the system is
equipped with an accessory external control, in which case, the
unit would activate to High fan speed, until the control is satis-
fied and then return to standby (off). See Fig. 29.
DEFROST (FAN SHUTDOWN) — The automatic defrost
cycle consists of a fan shutdown. When the supply airstream
temperature goes below 23 F, the supply motor shuts down and
the exhaust motor goes in to high speed. Ambient air is passed
through the unit for a period of 5 minutes. The supply motor
will then restart and run at the preset speed. The exhaust motor
will also slow down to the preset speed, and the unit will oper-
ate in the run cycle for 25 minutes. This fan shutdown defrost
cycle continues until the supply airstream rises above 32 F. See
Fig. 30.
MAINTENANCE
A yearly inspection is recommended to ensure the efficien-
cy and trouble-free use of the HRV. Verify the different operat-
ing modes.
Motor — The motors are factory balanced and lubricated for
life. They require no maintenance.
Chassis — The inside of the unit should be vacuumed
yearly. Be careful not to damage any of the mechanical compo-
nents and electrical connections.
Condensation Panel — The condensation panel should
be cleaned yearly.
Drain and Drain Line — Units with drain lines should
have their line and connection checked regularly.
Outside Hoods — The outside hoods need to be checked
every season to make sure there are no debris, leaves, or insects
blocking the airflow. Check regularly that there are no pollut-
ants near the intake hood. Make sure the hoods are clear of any
snow accumulation during the winter months.
Filters — The filters need to be checked and cleaned every
three months or when they appear dirty. This unit has two
filters.
To clean, remove the filters and vacuum. If the filters still
appear dirty, they can be washed in warm water and mild
detergent. Replace the filters if they become too soft after
washing. The filters should be replaced yearly or when they
can no longer be cleaned properly. The metal electrostatic filter
mayneedtobechangedafterwashingafewtimes.
Heat Recovery Core — Clean the heat recovery
polypropylene core annually or as needed with a vacuum
cleaner. Use a soft brush attachment. If the core still appears
dirty,itcanbewashedwithwarmwaterandmilddetergent.
Make sure the filters on the unit are cleaned. Failure to clean or
use filters may damage the heat recovery core and void the
warranty.
NOTE: The use of the heat recovery core in adverse envi-
ronment conditions such as dust, oil mist, excessive kitchen
grease, corrosive fumes, organic solvents, paint or any other
harmful chemicals can damage the heat recovery core and
void the warranty.
Make sure HRV is unplugged before performing any main-
tenance. Injury from electric shock could result.
AIR FROM

HOUSE
AIR FROM 
OUTSIDE
AIR TO 
HOUSE
AIR TO 
OUTSIDE
* NO EXCHANGE OF AIR
AIR FROM

HOUSE
AIR TO 
OUTSIDE
Fig. 28 — Continuous Mode
Fig. 29 — Intermittent Mode
Fig. 30 — Defrost Mode

12
TROUBLESHOOTING
See Table 2 for troubleshooting.
Table 2 — Troubleshooting
LEGEND
PROBLEM CAUSE SOLUTION
Air is Too Dry Dehumidistat control is set too low. Increase the desired level of humidity. Change
ventilation mode from continuous mode to
standby.
HRV out of balance. Balance HRV.
Air is Too Humid Dehumidistat control is set too high. Reduce the desired level of humidity. Use
continuous exchange mode.
Sudden change in temperature. Wait until outside temperature stabilizes
(winter). Heating will also improve humidity of
air.
Storing too much wood for heating. Store majority of wood outside. Even dried, a
cord of wood contains more than 20 gallons of
water.
Dryer vent exhaust is inside home. Arrange outside vent for dryer.
Poor air circulation near windows. Open curtains or blinds. Bay or bow windows
may require additional air circulation.
HRV out of balance. Balance HRV.
Basement door is closed. Open the door or install a grille on the door.
Air is Too Dry Dehumidistat control set too low. Increase the desired level of humidity. Change
ventilation mode from continuous to standby.
HRV out of balance. Balance HRV.
Persistent Condensation
on Window Improper adjustment of dehumidistat control. Reduce the desired level of humidity. Use con- tinuous exchange mode.
HRV out of balance. Balance HRV.
Poor Airflow 1/4-in. mesh on the outside hoods is plugged. Clean exterior hoods or vents.
Filters plugged. Remove and clean filter.
Core obstructed. Remove and clean core.
House grilles closed or blocked. Check and open grilles.
Dampers are closed if installed. Check and open dampers.
Poor power supply at site. Have electrician check supply voltage at
house.
Ductwork is restricting HRV operation. Check duct installation.
Improper speed control setting. Increase the speed of the HRV.
HRV airflow improperly balanced. Have contractor balance HRV.
Supply Air Feels Cold Poor location of supply grilles. Airflow may
irritate the occupant. Locate the grilles high on the walls or under the baseboards. Install ceiling mounted diffuser or
grilles so as not to directly vent the supply air
on the occupant.
Turn down the HRV supply speed.
Outdoor temperature extremely cold. A small duct heater (1 kW) can be used to
temper the supply air.
Placement of furniture or closed doors is
restricting the movement of air in the home.
If supply air is ducted into furnace return, the
furnace fan may need to run continuously to
distribute ventilation air comfortably.
ERV and/or Ducts Frosting Up HRV air flows are improperly balanced. Minimal frost build-up is expected on cores
before unit initiates defrost cycle functions.
Balance airflow if needed.
Malfunction of the HRV defrost system. Have HVAC contractor check the HRV.
Condensation or Ice Build-Up in Insulated Duct
to the Outside Incomplete vapor barrier around insulated duct. Tape and seal all joints. Ensure that the vapor barrier is completely sealed.
Hole or tear in outer duct covering. Tape any holes or tears made in the outer duct
covering. Ensure that the vapor barrier is com-
pletely sealed.
HRV — Heat Recovery Ventilator
HVAC — Heating, Ventilation and Air Conditioning

13
HEAT RECOVERY VENTILATORS
LIMITED 5 YEAR WARRANTY — PARTS
7 YEAR WARRANTY — MOTOR
LIFETIME WARRANTY — CORE
MULTI-YEAR WARRANTY — This CARRIER CORPORATION product is warranted to be free from defects in
material and workmanship under normal use and maintenance for a period of 5 years for parts, 7 years for the
motor, and a lifetime warranty for the core from the date of original installation. A new or remanufactured part to
replace the defective part will be provided without charge for the part itself, through a qualified servicing
CARRIER CORPORATION dealer or service, PROVIDED the defective part is returned to our distributor. The
replacement part assumes the unused portion of the warranty.
THIS WARRANTY DOES NOT INCLUDE ANY ADDITIONAL LABOR ALLOWANCE OR OTHER COSTS,
incurred for diagnosis, repairing, removing, installing, shipping, servicing, or handling of either defective parts or
replacement parts. SUCH COSTS MAY BE COVERED BY a separate warranty provided by the installer.
LIMITATIONS OF WARRANTIES — ALL IMPLIED WARRANTIES (INCLUDING IMPLIED WARRANTIES OF
MERCHANTABILITY) ARE HEREBY LIMITED IN DURATION TO THE PERIOD FOR WHICH THE LIMITED
WARRANTY IS GIVEN. THE EXPRESSED WARRANTIES MADE IN THIS WARRANTY ARE EXCLUSIVE AND
MAY NOT BE ALTERED, ENLARGED, OR CHANGED BY ANY DISTRIBUTOR, DEALER, OR OTHER PERSON
WHATSOEVER. CARRIER WILL NOT BE RESPONSIBLE FOR:
1. Normal maintenance as outlined in the installation and servicing instructions or owners manual including
cleaning and/or replacement of filters, media or electronic cells.
2. Damage or repairs required as a consequence of faulty installation or application by others.
3. Failure to start due to voltage conditions, blown fuses, open circuit breakers or other damages due to the
inadequacy or interruption of electrical service.
4. Damage or repairs needed as a consequence of any misapplication, abuse, improper servicing, unauthorized
alteration, or improper operations.
5. Damage as a result of floods, winds, fires, lightning, accidents, corrosive atmosphere, or other conditions
beyond the control of CARRIER CORPORATION.
6. Parts not supplied or designated by CARRIER CORPORATION.
7. CARRIER CORPORATION products installed outside the continental U.S.A., Alaska, Hawaii, and Canada.
8. ANY SPECIAL INDIRECT OR CONSEQUENTIAL PROPERTY OR COMMERCIAL DAMAGE OF ANY
NATURE WHATSOEVER. Some states do not allow the exclusion of incidental or consequential damages, so
the above limitation may not apply to you.
_________________________________________________________________________________________
Model No. Unit Serial No.
_________________________________________________________________________________________
Date of Installation Installed by
_________________________________________________________________________________________
Name of Owner Address of Installation
_________________________________________________________________________________________

Manufacturer reserves the right to
discontinue, or change at any time,
specifications or designs without notice
and without incurring obligations.
REPLACEMENT COMPONENTS DIVISION LITERATURE NUMBER P707-5SI
© CARRIER CORPORATION 2004 4-04 REPLACES: New
PRINTED IN U.S.A. CATALOG NUMBER 570-332