Broan HEPA 3000 - Manual (Page 23)

4.6 I
NSTALLING
I
NSULATED
F
LEXIBLE
D
UCTS
(HEPA 2000, HF2.0, HEPA 3000, HF 3.0
AND
HEPA 4000
UNITS ONLY
)
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.
4.6.1 C
ONNECTION TO
T
ANDEM
®
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.
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.
4. INSTALL THE UNIT (CONT’D)
CAUTION
Make sure the vapor barrier on the insulated ducts does not tear during
installation.
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VJ0025
VJ0022
VJ0023
VJ0024
1 2
3 4
E
XHAUST AIR TO OUTSIDE
DUCT ON TOP