8
NOTE
: For Method 1, it is not essential to synchronize the
furnace blower operation with the unit operation, but it is
recommended.
Connecting the ducts to the unit
Insulated flexible ducts
Use the following procedure to connect the insulated flexible ducts
to the ports of the unit (
Exhaust air to outside
and
Fresh air from
outside
ports).
PROPERTY DAMAGE HAZARD
Failure to follow this caution may result in property damage.
If ducts have to go through an unconditioned space (e.g.:
attic), always use insulated ducts.
CAUTION
!
1. Pull back the insulation to expose the flexible duct.
2. Attach the flexible duct to the port using tie wrap.
3. Pull the insulation over the joint and tuck in between the
inner and outer rings of the double collar.
4. Pull down the vapor barrier (shaded part in Fig. 15) 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.
PROPERTY DAMAGE HAZARD
Failure to follow this caution may result in property damage.
Make sure the vapor barrier on the insulated ducts does not
tear during installation to avoid condensation within the ducts.
CAUTION
!
Non- insulated rigid ducts
Use metal screws and duct tape to connect the rigid ducts to the
unit ports.
Non- insulated flexible ducts
Use tie wraps to connect the flexible ducts to the unit ports.
1
2
3
4
Collar pin
Collar pin
A11204
Fig. 15 - Ductwork installation
Non-insulated rigid ducts
Non-insulated flexible ducts
A11205
Fig. 16 - Ductwork installation
