4.INSTALL THE UNIT (CONT’D)
4.6INSTALLING INSULATED FLEXIBLE DUCTS
(HEPA 2000, HF2.0, HEPA 3000, HF 3.0 AND HEPA 4000 UNITS ONLY)
CAUTION
Make sure the vapor barrier on the insulated ducts does not tear during installation.
Use the following procedure for connecting the insulated flexible ducts to the Tandem® transition* (EXHAUST AIR TO OUTSIDE and FRESH AIR FROM OUTSIDE). NOTE: If the joist are perpendicular to the ducts, or if the connection to the exterior
hood is in a limited area, your installation will need two exterior hoods instead of one. In this case, do not use the Tandem® transition. Identify each insulated duct. For fresh air from outside duct, use the blue sticker dots (one dot at each end). For exhaust air to outside duct, use the red sticker dots (one dot at each end). Then, go to point 4.6.2 and refer to the optional single hood enclosed instructions.
*Patent pending.
4.6.1CONNECTION TO TANDEM® TRANSITION
1.For each duct, pull back the insulation to expose the interior flexible duct.
2.Connect the interior flexible duct to the smaller part of the Tandem® transition (5’’ oval) using a 24’’ tie wrap.
NOTE: If you are using a 6’’ diameter insulated duct, use the bigger part of the Tandem® transition (6’’ oval).
3.Pull the insulation over the joint. Pull the vapor barrier over the insulation.
4.Apply duct tape gently to the joint in order to make an airtight seal. See figures below.
1 | EXHAUST AIR TO OUTSIDE |
| DUCT ON TOP |
VJ0025 |
|
3 |
|
2
VJ0022
4
VJ0023
VJ0024
Identify each insulated duct. For fresh air from outside duct, use the blue sticker dots (one dot at each end). For exhaust air to outside duct, use the red sticker dots (one dot at each end). Be careful to identify the exhaust air to outside duct (red dot) at the upper section of the transition.
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