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11
For the Installer
6.5 CONNECTING THE DUCTS TO THE UNIT
NOTE: This unit was designed to be connected to ducts of at least 4” in diameter, but can be connected to bigger sized ducts by using an
appropriate transition (e.g.: 4” diameter to 5” diameter transition).
1. Pull back the insulation to expose the flexible duct.
2. Attach the flexible duct to the port using a tie wrap.
3. Pull the insulation over the joint and tuck it in between the inner and outer rings of the double collar.
4. Pull down the vapor barrier (shaded part in illustrations below) over the outer ring to cover it completely. Apply duct tape to the joint to
make an airtight seal. Avoid compressing the insulation when pulling the tape tightly around the joint.
Make sure the vapor barrier on the insulated ducts does not tear during installation to avoid condensation within
the ducts. If ducts have to go through an unconditioned space (e.g.: attic), always use insulated ducts.
CAUTION
VJ0127
1
2
3
4
Non-insulated rigid ducts
Use metal screws and duct
tape to connect the rigid
ducts to the unit ports.
Non-insulated flexible
ducts
Use tie wraps to connect
the flexible ducts to the
unit ports.
VJ0073
6.6 CONNECTING THE DRAIN
1. Connect the plastic tube to the drain fitting located under the unit.
2. Make a water trap loop in the tube to prevent the unit from drawing unpleasant odors from the
drain source. Run the tube to the floor drain or to an alternative drain pipe or pail.
VO0190
VD0240A
± 1”
TIE-WRAP
CAUTION
If using a pail to collect water, locate the tube end approximately 1” into the pail
in order to prevent water from being drawn back up into the unit.
A drain tubing (included) must be installed for all HRV units. For ERV units, it is not required, however, it is
recommended for climates where the outside temperature typically remains below -25°C (-13°F), (over a 24-hour
period) for several days in a row, combined with an indoor humidity of 40% or higher.
CAUTION
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