ERV & HRV: User and Installer Manual
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
7
INSTALLING DUAL EXTERIOR HOOD USING
TANDEM® TRANSITION KIT (OPTIONAL)
For units set at 110 CFM or less, a Tandem transition kit can be used
instead of 2 exterior hoods; but take into account this device will
generate approximately an additional 0.2 in w.g. static pressure
depending on the installation.
The minimum joist opening needed to install the Tandem® transition is
9¾". The maximum height of the Tandem transition is 8¾".
To connect the insulated flexible ducts to the Tandem transition (Exhaust
air to outdoors and Fresh air from outdoors), follow the instructions
included with the Tandem transition kit (P/N KVAAC0101HCO).
A200568
Fig. 11 – Dual Exterior Hood with Tandem Kit
INSTALLING THE EXTERIOR HOODS
Choose an appropriate location for the exterior hoods:
• At least 6 feet between both hoods to avoid cross-contamination
• At least 18 inches away from the ground
Refer to Fig. 12 for proper connection method of the insulated ducts to
the hoods. An “Anti-Gust Intake Hood” should be installed in regions
where a lot of snow is expected to fall.
A200569
Fig. 12 – Exterior Hoods
CONNECTING THE DUCTS TO THE UNIT
INSULATED FLEXIBLE DUCTS
Use the following procedure to connect the insulated flexible ducts to the
ports of the unit (exhaust to outside and fresh air from outside).
1. Expose the flexible duct by pulling back the insulation, and place it
over the inner port ring.
2. Attach the flexible duct to the port using a tie wrap.
3. Seal the joint using duct tape.
4. Pull the insulation and vapor barrier over the joint, tuck them
between the inner and outer rings of the double collar and fasten
them in place using duct tape.
A200570
Fig. 13 – Connecting Duct to the Unit
WARNING
!
EXPLOSION HAZARD
Failure to follow this warning could result in death, serious personal
injury, and/or property damage.
Make sure the intake hood is at least 6 feet away from any of the
following:
-
Dryer exhaust, high efficiency furnace vent, central vacuum
vent
-
Gas meter exhaust, gas barbecue-grill
-
Any exhaust from a combustion source
-
Garbage bin and any other source of contamination.
CAUTION
!
UNIT DAMAGE HAZARD
Failure to follow this caution may result in equipment damage or
improper operation.
-
If ducts have to go through an unconditioned space (e.g.: attic),
always use insulated ducts to avoid condensation and mold.
-
Do not use screws to connect the ducts or transitions to the
ports. They could interfere with proper damper operation.
CAUTION
!
UNIT DAMAGE HAZARD
Failure to follow this caution may result in equipment damage or
improper operation.
-
Avoid tearing off the vapor barrier on the insulated ducts during
installation to avoid condensation within the ducts.