Lifebreath HRV Series User manual

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General
These Heat Recovery Ventilators (HRV) are designed for commercial and industrial applications to provide
fresh air to a building while exhausting an equal amount of stale air. During the winter months the incoming
cold fresh air is warmed by utilizing the heat recovered from the stale air before 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 equipped with an aluminum core. The device uses the stale air that is being exhausted to condition
the fresh air as it is being brought in. These instructions are intended as a general guide and do not supersede
local codes in any way. Consult authorities who have jurisdiction before installation.
Pre-Installation Notes
Note
•Due to ongoing research and product development, specifications, ratings, and dimensions are subject
to change without notice. Refer to www.lifebreath.com for the latest product information.
Warning
•Before installation, careful consideration must be given to how this system will operate if connected to
any other piece of mechanical equipment, i.e. a forced air furnace or air handler, operating at a higher
static pressure.
•After installation, the compatibility of the two pieces of equipment must be confirmed by measuring
the airflows of the HRV by using the balancing procedure found in this manual.
•Do not apply electrical power to the unit until installation has been fully completed (including low
voltage control wiring).
•Assess how the operation of an HRV may interact with already installed vented combustion equipment
(i.e., Gas Furnaces, Oil Furnaces, Wood Stoves, etc.).
•Never install an HRV in a situation where its normal operation, lack of operation or partial failure may
result in the backdrafting or improper functioning of vented combustion equipment.
•Do not use this appliance to exhaust hazardous or explosive material and vapours.
•It is strongly recommended that an electrical disconnect be installed prior to the HRV and that it is
turned off and locked out before servicing the unit.
•Two (2) knock-outs are provided. One is to be used for line voltage and the other knock-out is for 24V
control wires. System is 240V, 1 phase, 60 Hz.
•All electrical connections should be made by a qualified electrician.
•Disconnect the power from the unit before cleaning or servicing.

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TABLE OF CONTENTS
Mounting the 1500/2000/2500 Indoor Models .......................................................................................................2
Mounting the 1500 Rooftop models ......................................................................................................................3
Mounting the 2000 Rooftop models ......................................................................................................................2
Mounting the 2500 Rooftop models ......................................................................................................................2
Roof Curb Assembly Instructions ..........................................................................................................................2
Ducting the System .............................................................................................................................................3
Dimensional Drawings..........................................................................................................................................4
The Integrated HVAC System ...........................................................................................................................7
Stale Air Return And Fresh Air Supply System ....................................................................................................9
Weatherhoods ...............................................................................................................................................10
Drain Connections..........................................................................................................................................11
Function and Controls ....................................................................................................................................12
Main Wall Control.............................................................................................................................................2
Timers and Repeaters ......................................................................................................................................5
Dehumidistat ...................................................................................................................................................9
Aircom Relays & Interlocking to a furnace/air handler ......................................................................................10
Adjusting the air flow (1500 units) ..................................................................................................................11
Adjusting the Airflow (2000 units) ...................................................................................................................12
Adjusting the Airflow (2500 units) ...................................................................................................................13
Fan Defrost (All units) ....................................................................................................................................14
Balancing the Airflows ....................................................................................................................................15
Service and Maintenance (1500 Units).............................................................................................................17
Service and Maintenance (2000 Units).............................................................................................................18
Service and Maintenance (2500 Units).............................................................................................................19
Wiring Diagrams (1500I-ECM/E-ECM)..............................................................................................................20
Wiring Diagrams (2000IFD/EFD-208) ..............................................................................................................21
Wiring Diagrams (2000IFD/EFD, -208SP).........................................................................................................22
Wiring Diagrams (2000IFD/EFD-460) ..............................................................................................................23
Wiring Diagrams (2000IFD/EFD-575) ..............................................................................................................24
Wiring Diagrams (2500IFD/EFD) .....................................................................................................................25
Wiring Diagrams (2500IFD/EFD-208) ..............................................................................................................26
Warranty .......................................................................................................................................................27

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MOUNTING THE 1500/2000/2500 INDOOR MODELS
The HRV be in a heated space where the surrounding air temperature does not fall below 60°F
(16°C). The HRV must be mounted level (horizontal) to obtain proper drainage of water from the
heat exchange element and drip pans. The warranty will be void if these conditions are not met.
Typically, the HRV is positioned close to an outside wall or the roof to simplify the connections and
keep the length of insulated ducting required for the fresh air intake to a minimum.
A minimum clearance of 40 in. (1m) on one side of the HRV is recommended to service the heat
exchanger cores and the filters.
Hanging the HRV
The HRV should be hung by a threaded rod type assembly which
provides a cradle for the unit. Note that 4x4s should sit between
the metal “U” channels and the unit to avoid damage to the lip of
the cabinet. Mounting hardware not provided.
Floor Mounting the HRV
Mount the unit on wooden or metal support assembly.
Raise the HRV to an adequate height and slope the drain
lines. The unit may be mounted on an equipment platform
providing the drain hoses are clear and there is enough
space to open the doors for servicing.

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MOUNTING THE 1500 ROOFTOP MODELS
Roof Mount
The units are designed to be mounted outdoors, usually
fastened to a roof curb assembly. A minimum clearance of 40
in. (1m) on one side of the HRV is recommended to service
the heat exchanger cores and the filters.
Optional Roof Curb (Part No. 53-1500)
Special care and attention should be given to positioning the cross members of the roof curb, so that the they
line up exactly with the duct openings on the HRV.
It is also important to ensure that the perimeter of the curb is insulated, but the interior of the curb is not.
This allows heat from the building to prevent freezing of the drain liens and pans.
Note: Roof curb is one inch smaller
than outside dimension of cabinet

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MOUNTING THE 2000 ROOFTOP MODELS
Roof Mount
The units are designed to be mounted outdoors, usually
fastened to a roof curb assembly. A minimum clearance of 40
in. (1m) on one side of the HRV is recommended to service
the heat exchanger cores and the filters.
Optional Roof Curb (Part No. 53-2007)
Special care and attention should be given to positioning the cross members of the roof curb, so that the they
line up exactly with the duct openings on the HRV.
It is also important to ensure that the perimeter of the curb is insulated, but the interior of the curb is not.
This allows heat from the building to prevent freezing of the drain liens and pans.
Note: Roof curb is one inch smaller
than outside dimension of cabinet

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MOUNTING THE 2500 ROOFTOP MODELS
Roof Mount
The units are designed to be mounted outdoors, usually
fastened to a roof curb assembly. A minimum clearance of 40
in. (1m) on one side of the HRV is recommended to service the
heat exchanger cores and the filters.
Optional Roof Curb (Part No. 53-2500)
Special care and attention should be given to positioning the cross members of the roof curb, so that the they
line up exactly with the duct openings on the HRV.
It is also important to ensure that the perimeter of the curb is insulated, but the interior of the curb is not.
This allows heat from the building to prevent freezing of the drain liens and pans.
Note: Roof curb is one inch smaller
than outside dimension of cabinet

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ROOF CURB ASSEMBLY INSTRUCTIONS
Frame Assembly
1. Stand one end piece (locking tabs) and one side
piece (slots) vertically on the floor or roof.
2. Raise the corner of the end piece (locking tabs)
slightly and mate with side piece (slots). Ensure
that lower locking tab with leading edge is through
slot opening.
3. Push down on top edge of end piece. Ensure that
all 3 of the locking tabs are feeding into each
corresponding slot opening. Once both pieces are
flush, the process is complete.
4. Drive one spike provided into wood nailer strips at
each corner.
Frame Application and Location
This roof mounting frame provides necessary support when
the unit is installed. The frame can be installed directly on
deck having adequate structural strength or on roof
supports under deck.
Securing the Frame
To ensure proper mating with unit, it is critical that
mounting frame be squared to the roof, as follows:
1. With frame situated level in desired location on roof
trusses, tack weld one corner of frame.
2. Measure frame diagonally from one corner to the
opposite corner. Repeat with the remaining two
corners. These dimensions must be equal to the
frame to be square.
3. It is extremely important to sight frame from all
corners to ensure that the frame is not twisted
across top side. Shim frame under any low sides.
4. After frame has been squared, straightened, and
shimmed, weld or attach frame securely to the
roof.
Attention
•Max. slope tolerance: 1/16 in. per linear foot in any direction
•Note specification of duct location on bottom of HRV when positioning cross members (duct cavity).

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DUCTING THE SYSTEM
A well designed ducting system will allow the HRV to operate at its maximum efficiency. Avoid the use of
undersized ducting and sharp radius bends and tees which can significantly increase the system pressure drop
and reduce the air flows.
To minimize pressure, drop and noise, galvanized metal ducts sized for the given velocities are recommended:
Units
Max Velocity (fpm)
Max Velocity (m/s)
1500I/1500E
725
3.68
2000IFD/2000EFD
725
3.68
2500IFD/2500EFD
1200
6.09
Keep ducting as short as possible and use a minimum of elbows and tees. Connecting sections and shorter
runs may be flexible ducting one size larger than the metal duct. Use flexible duct connectors at the HRV to
avoid noise transmission.
All duct joints must be secured with screws, rivets or duct sealant and sealed with aluminum duct tape to
prevent leakage.
General Exhaust Systems
In installations where it is satisfactory to provide general exhaust from the space, the air to be exhausted may
be taken directly from the return air plenum to the HRV as it is drawn back to the air handler. Fresh air
supplied by the HRV is then introduced directly into the return air plenum but at a location close to the air
handler. The air handler would have a constant running blower to effectively distribute the fresh air and
remove the stale air. Balancing dampers would be in both the HRV supply and exhaust ducts between the
return air plenum and the HRV.
Warm-Side Ducting – General:
Ducting from the HRV to different areas within the building should be galvanized metal whenever possible.
To minimize airflow losses in the ductwork system, all ducts should be as short as possible and with as few
bends or elbows as possible. Use 45 degree elbows instead of 90 degree elbows, whenever possible. Use Y
tees instead of 90 degree tees whenever possible.
All duct joints must be fastened securely and wrapped with a quality duct tape to prevent leakage. We
recommend aluminum foil tape.
Attention
•Flexible duct connectors should be installed between the HRV and the galvanized ductwork.
•Use fully insulated ducting with an integral vapour barrier on all runs that pass through unheated areas
to avoid condensation problems and energy losses from the air streams. Consult local codes.

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DIMENSIONAL DRAWINGS
1500I-ECM Dimensions:
1500E-ECM Dimensions: