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4.6 INSTALLING INSULATED FLEXIBLE DUCTS
(HEPA 2000, HF 2.0, HEPA 3000, HF 3.0 AND HEPA 4000 UNITS ONLY) (CONT’D)
4.6.2 C
ONNECTION TO THE 5’’ TO 6’’ OVAL PORTS OF THE UNIT
Use the following procedure for connecting the insulated flexible ducts to the 5’’ to 6’’
oval ports of the unit (
EXHAUST AIR TO OUTSIDE
and
FRESH AIR FROM OUTSIDE
).
1. Pull back the insulation to expose the flexible
duct.
2. Connect the interior flexible duct to the smaller
part of the port (5’’ oval) using a 24’’ tie wrap.
NOTE: If you are using a 6’’ diameter insulated duct,
use the bigger part of the port (6’’ oval).
3. Pull the insulation over the joint and tuck it
between the inner and outer rings of the port.
Pull the vapor barrier over the insulation and
over the outer ring of the port.
4. Apply duct tape gently to the joint in order to
make an airtight seal.
5. Repeat steps 1 to 4 for the other 5’’ to 6’’ port.
See figure beside to find the
EXHAUST AIR
TO OUTSIDE
(1) and
FRESH AIR FROM
OUTSIDE
(2) oval ports on the top of the unit.
Be careful to connect the right insulated
duct to its corresponding port.
VJ0017
VJ0018
CAUTION
Avoid compressing the insulation when you pull the tape tightly around the
joint. Compressed insulation loses its insulation properties and causes
water dripping due to condensation on the exterior surface of the duct.
VJ0019
4. INSTALL THE UNIT (CONT’D)
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