Connecting The Duct To The Unit - Broan ERV90HCS Installation Instructions Manual

3. INSTALLATION
(CONT'D)
3.7 C
ONNECTING THE DUCTS TO THE UNIT
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.
VJ0039
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 transition must be
9¾" (248 mm) minimum. Also, the maximum height of the Tandem transition is
8¾" (222 mm). See Tandem Transition end view beside. 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 H
EXTERIOR OODS
*Patented.
VJ0040
Attach the flexible
duct to the port using
tie wrap.
® T * K
RANSITION IT
.
CAUTION
VJ0043 VJ0041
Pull the insulation
Pull the vapor barrier
over the joint and tuck
over the insulation and
in between the inner over the outer ring of the
and outer rings of the double collar.
double collar.
Make
vapor barrier on the
insulated ducts does
not
installation to avoid
condensation within
the ducts.
CAUTION
NSTALLING
- 13 -
VJ0042
Apply duct tape to the
joint making an airtight
seal. Avoid compressing
the insulation when
pulling the tape tightly
CAUTION
around
sure the
Compressed insulation
loses its R value and
causes water dripping
due to condensation
tear during
on the exterior surface
of the duct.
9¾"
248 mm
VD0118A
the joint.
8¾"
222 mm