Connecting The Ducts To The Unit; Installing The Tandem ® Transition Kit - Broan HRV90HT Guia De Instalacion

3. INSTALLATION (
CONT
3.7 C D
ONNECTING THE UCTS TO THE
Insulated flexible ducts:
Use the following procedure for connecting the insulated flexible ducts to the port of the unit (Exhaust air to outside and Fresh air
from outside ports).
Make sure the balancing dampers are set to their appropriate position before connecting the ducts to the ports. See Section 3.3.
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Pull back the insulation to expose
the flexible duct.
Rigid ducts:
Do not use screws to connect the rigid ducts to the ports.
Use a small length of flexible duct to connect the rigid duct to the ports in order to avoid vibration transmissions. Use tie-wraps to
perform connections.
3.8 I T
NSTALLING THE ANDEM
Use the following procedure for connecting the insulated flexible ducts to the Tandem Transition (Exhaust air to outside and Fresh air from
outside).
NOTE: The joist opening needed to install the Tandem
The maximum height of the Tandem
view at right. If the joists 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 kit. See next Section
3.9 I 2
NSTALLING EXTERIOR HOODS
*Patented.
' )
D
U
NIT
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Attach the flexible duct
to the port using tie
wrap.
® T * K
RANSITION IT
®
®
transition is 8¾" . See tandem Transision end
.
CAUTION
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Pull the insulation over
the joint and tuck in
between the inner
and outer rings of the
double collar.
CAUTION
transition must be 9¾" minimum.
13
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Pull the vapor barrier Apply duct tape to
over the insulation and the joint making an
over the outer ring of airtight
the double collar. compressing
insulation when pulling
CAUTION
the tape tightly around
Make sure the
the joint.
vapor barrier on
Compressed insulation
the insulated ducts
loses its R value and
does not tear during
causes water dripping
installation to avoid
due to condensation
c o n d e n s a t i o n
on the exterior surface
within the ducts.
of the duct.
9¾"
248 mm
VD0118A
seal. Avoid
the
8¾"
222 mm