3. INSTALLATION (
3.6 C
ONNECTING THE DUCTS TO THE UNIT
If ducts have to go through an unconditioned space (e.g.: attic), always use insulated ducts.
I
NSULATED FLEXIBLE DUCTS
Use the following procedure for connecting the insulated flexible duct to the ports on the unit (exhaust to outside and fresh air from
outside).
Pull back the insulation to expose the flexible duct.
Attach the flexible duct to the port using tie wrap.
Pull the insulation over the joint and tuck it between the inner and outer rings of the double collar.
Pull down the vapor barrier (shaded part in illustrations below) over the outer ring to cover it completely. Fasten in place the vapor
barrier using the port strap (included in unit parts bag). To do so, insert one collar pin through vapor barrier and first strap hole,
then insert the other collar pin through vapor barrier and center strap hole and close the loop by inserting the first collar pin in the
last strap hole.
Make sure the vapor barrier on the insulated ducts does not tear during installation to avoid condensation within
the ducts.
1
VJ0083
R
IGID DUCTS
Use duct tape to connect the rigid ducts to the ports.
Do not use screws to connect rigid ducts to the ports.
Make sure that both balancing dampers are left in a fully open
position before connecting the ducts to these ports (Fresh air to
building port and Exhaust air from building port as shown in
illustration at right).
'
)
CONT
D
2
CAUTION
CAUTION
3
CAUTION
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10
C
OLLAR PIN
4
C
OLLAR PIN