7
1
3
2
4
5
VJ0091
± 1"
T
IE
WRAP
ON
DUCT
TAPE
CONNECTING THE UNIT TO THE INSULATED FLEXIBLE DUCTS
THE
FLEXIBLE
DUCT
CONNECTED
TO
THE
EXHAUST
TO
OUTSIDE
PORT
SHOULD
DROP
1"
BELOW
THE
PORT
BEFORE
GOING
BACK
UP
.
A
LUMINUM
DUCT
TAPE
ON
FLEXIBLE
DUCT
P
LACE
FLEXIBLE
DUCT
OVER
INNER
PORT
RING
I
NSULATION
TUCKED
BETWEEN
INNER
AND
OUTER
RINGS
V
APOR
-
BARRIER
AND
PORT
STRAP
OVER
THE
OUTER
RING
A12562
Fig. 14 - Rigid Ducts
5. Pull down the vapor barrier (shaded part in Fig. 14 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 bar-
rier and center strap hole and close the loop by inserting the
first collar pin in the last strap hole.
IMPORTANT
: Make sure the vapor barrier on the insulated ducts
does not tear during installation to avoid condensation within the
ducts.
Use duct tape to connect the rigid ducts to the ports.
IMPORTANT
: 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
Fig. 15.
A12295
Fig. 15 - Opened Balancing Dampers
Installing the Exterior Hoods
Choose an appropriate location for installing the exterior hoods:
S
At a minimum distance of 6 feet (1.8 m) between the hoods to
avoid cross- contamination
S
At a minimum distance of 18 inches (457 mm) from the ground
IMPORTANT
: Make sure the intake hood is at least 6 feet (1.8 m)
away from any of the following:
S
Dryer exhaust, high efficiency furnace vent, central vacu-
um vent
S
Gas meter exhaust, gas barbecue- grill
S
Any exhaust from a combustion source
S
Garbage bin and any other source of contamination
Refer to Fig. 16 For connecting the insulated duct to the hoods. An
“Anti- Gust Intake Hood” should be installed in regions where a lot
of snow is expected to fall.
Exhaust hood
Intake hood
Optional
duct location
Tape and duct tie
18-in
(457 mm)
6-ft
(1.8 m)
6-ft
(1.8 m)
18-in
(457 mm)
A11206
Fig. 16 - Exterior Hoods
