DIRECTCONNECTION of both the HRV SUPPLY AIR STREAM and
EXHAUST AIR STREAM to the FURNACECOLD AIR RETURN
InstallationNotes
• Unitis normally balanced on HIGH speed with the furnace blower ON.
• Aminimum separation of 40 inches (1m) is recommended between the
twodirect connections.
• Theexhaust air connection should be upstream of the supply air
connectionto prevent exhausting any fresh air.
• Weatherhoodarrangement is for drawing purposes only. Six feet (2m)
minimumseparation is recommended. The Weatherhood must also be 18"
(460mm)above grade minimum.
• Theairflow must be confirmed onsite using the balancing procedures found in this manual
Spring-LoadedBackdraft Damper
Installthe Backdraft Damper with the leaf hinge vertical.
Thedamper is installed on the “Stale Air to Outside Collar”.
4”(102mm) Backdraft Damper Part No. 99-RSK4
5”(127mm) Backdraft Damper Part No. 99-RSK5
6”(152mm) Backdraft Damper Part No. 99-RSK6
8”(203mm) Backdraft Damper Part No. 99-RSK8
TheStale Air to Outside air duct requires
aBackdraft Damper.This damper prevents
outdoorair from entering the HRV
duringthe operation of the Furnace/
AirHandler while the HRV is in standby,
OFFor Recirculate.
WARNING
RETURNAIR
40"(1m) MINIMUM
Outdoors
CoolAir
Return
3'min.
recommended
ForcedAir
Furnace
Dampersfor
balancing
airflows
Backdraft
Damper
LeafHinge
Simplified Installation Diagrams
Simplified Installation (Return/Return Method)
KeyPoints
• TheHRV/ERV must be balanced.
• Itis mandatory that the furnace blower run continuously or
HRV/ERVoperation be interlocked with the furnace
blower.(Refer to “Interlocking the HRV/ERV to an Air
Handler/FurnaceBlower.”)
• Theduct configuration may change depending on the
HRV/ERVmodel. See specifications for your unit.
• Checklocal codes / authority having jurisdiction for
acceptance.
• Abackdraft damper is required in the exhaust air duct to
preventoutdoor air from entering the unit when the
Furnace/AirHandler is running and the unit is in Standby,
OFFor Recirculate.
Sizing the Ductwork
Itis the responsibility of the installer to ensure all ductwork is
sized and inst alled as designed t o ensure the system wi ll
performas intended.
The amount of air (cfm) that an HRV/ERV 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 plus the number of
fittingsused in the duct work.
DIRECT CONNECTION of the SUPPLY AIR STREAM and
EXHAUST AIR STREAM to the FURNACE COLD AIR RETURN.
14
(notincluded)