Lifebreath 455FD User manual

www.lifebreath.com 1
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.
Attention
•Do not apply electrical power to the unit until after the completion of the installation (including
installation of low voltage control wiring).
•Ensure the installation and wiring is in accordance with all local electrical codes.
•Plug the unit into a standard designated (120 VAC) electrical outlet with ground.
•The use of an extension cord with this unit is not recommended. If the installation requires
further wiring, have a licensed electrician make all the electrical connections. The
recommended circuit is a separate 15 A/120 V circuit.
Caution
•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. 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. Never install a ventilator in a situation where its normal operation, lack of
operation or partial failure may result in the back drafting or improper functioning of vented
combustion equipment
•Unit must be installed level to ensure proper condensate drainage. Due to the broad range of
installation and operational conditions, consider the possibility of condensation forming on
either the unit or connecting ducting. Objects below the installation may be exposed to
condensate.
•Do not install control wiring alongside electrical wire.
Warning
•Disconnect the power from the unit before cleaning or servicing.
•To prevent electrical shock, it is extremely important to confirm the polarity of the power line
that is switched by the safety (disconnect) switch. The hot line (black) is the proper line for
switching. Use either a voltmeter or test lamp to confirm the absence of a voltage between the
disconnect switch and ground (on the cabinet) while the door is open. This procedure must be
followed, as dwellings are occasionally wired improperly. Always ensure the proper grounding
of the unit.
•Improper installation, adjustment, alteration, service or maintenance can cause property
damage, personal injury or loss of life. Installation and service must be performed by a
qualified installer or service agency.

www.lifebreath.com 2
Table of Contents
1 Location Notes ................................................................................................................................................................ 2
2 Ducting the System ......................................................................................................................................................... 2
3 Dimensional Drawings .................................................................................................................................................... 3
3 Dimensional Drawings .................................................................................................................................................... 4
4 The Integrated HVAC System.......................................................................................................................................... 5
5 The Integrated HVAC System.......................................................................................................................................... 2
6 Stale Air Return and Fresh Air Supply System ................................................................................................................ 3
7 Weatherhoods and Grilles .............................................................................................................................................. 4
8 Drain Connections........................................................................................................................................................... 5
9 Electrical Connections..................................................................................................................................................... 6
10 Function and Controls..................................................................................................................................................... 7
11 Main Wall Control ........................................................................................................................................................... 2
12 Main Wall Controls ......................................................................................................................................................... 2
13 Main Wall Control ........................................................................................................................................................... 2
14 Main Control (99-BC02/3/4) ........................................................................................................................................... 3
15 Main Control (99-500)..................................................................................................................................................... 4
16 Timers and Repeaters ..................................................................................................................................................... 5
16 Timers and Repeaters ..................................................................................................................................................... 6
16 Timers and Repeaters ..................................................................................................................................................... 7
16 Timers and Repeaters ..................................................................................................................................................... 8
17 Air Com Relays & Interlocking to a furnace/air handler ................................................................................................. 9
18 Reversing the Supply and Defrost Air Ports (DD Models only)..................................................................................... 10
19 Fan Defrost and Damper Defrost.................................................................................................................................. 11
20 Balancing the Airflows .................................................................................................................................................. 12
21 Balancing the Airflows .................................................................................................................................................. 13
22 Service and Maintenance.............................................................................................................................................. 14
22 Service and Maintenance.............................................................................................................................................. 15
23 Reverse Installation of the HRV .................................................................................................................................... 16
23 Reverse Installation of the HRV .................................................................................................................................... 17
24 Troubleshooting ............................................................................................................................................................ 18
24 Troubleshooting ............................................................................................................................................................ 19
25 Wiring Diagrams (455FD) .............................................................................................................................................. 20
25 Wiring Diagrams (650FD, 700FD, 1200FD).................................................................................................................... 21
25 Wiring Diagrams (455DD, 650DD, 700DD, 1200DD)..................................................................................................... 22
26 Warranty ....................................................................................................................................................................... 23

www.lifebreath.com 2
1LOCATION NOTES
The HRV must 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 30 in. (76 cm) in front of the unit is recommended to service the heat
exchanger cores and the filters. The HRV may be mounted on an equipment platform providing the
drain hoses are clear and there is enough space to open the doors for servicing.
Saddle Installation
(1) Threaded rod (supplied by others)
(2) Vibration isolators (supplied by others)
Hang unit with suspended rods and “U”
channel members
Curb Mounted Installation
(1) Curb—Wood or Metal (supplied by others)
(2) Vibration isolators (supplied by others)
Mount unit on wooden or metal curb assembly.
HRV must be raised an adequate height for
installation and slope of drain lines. May be
anchored to floor, leaving space for drain
connections.

www.lifebreath.com 2
2DUCTING THE SYSTEM
A properly designed ducting system will allow the HRV to operate at its maximum efficiency. (Air flow
will be restricted by undersized ducting, use of too many elbows, tees, bends, etc.). Always try to
keep duct runs as short and straight as possible.
All joints must be airtight, sealed and impervious to moisture. See Dimensional Drawings for each
unit for exact duct sizes and location.
To minimize pressure drop and noise, galvanized metal ducts, properly sized, are recommended.
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
equivalent. 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.
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.