DIRECTCONNECTION of the SUPPLY AIR STREAM to the FURNACE COLD AIR RETURN
(Staleair drawn from key areas of home)
ForcedAir
Furnace
Outdoors
EXHAUST AIR fromvariouspar ts of home.
i.e.bathrooms(if required), kitchens (if required).
CoolAir
Return
ReturnAir
3'min.
recommended
InstallationNotes
• Unitis normally balanced on HIGH speed with the furnace blower ON.
• 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 on site using the balancing procedures
foundin this manual.
Dampersfor
balancing
airflows
Backdraft
Damper
leafhinge
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 during
theoperation of the Furnace/Air Handler
whilethe HRV is in standby, OFF or
Recirculate.
WARNING
Partially Dedicated Installation Diagrams
Partially Dedicated System
This installation enables stale air to be drawn from the
poorestair quality areas of the home (bathrooms, kitchen).
KeyPoints
• TheHRV/ERV must be balanced.
• Itis recommended that the furnace blower run
continuouslyor HRV/ERV operation be interlocked
withthe furnace blower to evenly distribute the fresh air
throughoutthe house.(Refer to “Interlocking the
HRV/ERVto an Air Handler/Furnace Blower.”)
• Theduct configuration may change depending on the
HRVmodel. 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,OFF or Recirculate.
Sizing the Ductwork
It is the responsibility of the installer to ensure all
ductwork is sized and installed as designed to ensure the
systemwill perform as 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
numberof fittings used in the duct work.
15
(notincluded)