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For the Installer
6.5 CONNECTING THE DUCTS TO THE UNIT
Insulated flexible ducts
Use the following procedure to connect the insulated flexible ducts to the cold side ports (stale air to outdoors and fresh air from outdoors).
1. Pull back the insulation to expose the flexible duct and place the flexible duct over inner port ring.
2. Install good quality aluminum duct tape on the flexible duct to prevent water leakage.
3. Attach the flexible duct to the port using a tie wrap.
4. Pull the insulation over the joint and tuck it between the inner and outer rings of the double collar.
5. Pull down the vapor barrier (shaded part in illustrations below) over the outer ring to cover it completely. Fasten the vapor barrier in
place using the port strap (included in parts bag). To do so, insert one collar pin through the vapor barrier and first strap hole, then
insert the other collar pin through the vapor barrier and center strap hole and close the loop by inserting the first collar pin in the last
strap hole.
Rigid ducts
To prevent water leakage from ducts, use good quality aluminum duct tape to connect the rigid ducts to the ports. Do not use screws.
Make sure that both balancing dampers are left in a fully open
position before connecting the Fresh air to building port and Stale
air from building port (as shown in illustration at right).
VJ0088
VJ0091
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COLLAR PIN
COLLAR PIN
CAUTION
• If ducts have to go through an unconditioned space (e.g.: attic), always use insulated ducts.
• Make sure the vapor barrier on the insulated ducts does not tear during installation to avoid condensation
within the ducts.
• Do not use screws to connect rigid ducts to the ports.
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