Connecting The Duct To The Unit - Broan ERV90HC 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® tansition must be
9 3/4" (248 mm) minimum. Also, the maximum height of the Tandem®
transition is 8 3/4" (222 mm). See Tandem® transition end view beside.
If the joist 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
*Patent pending.
VJ0040
Attach the flexible
duct to the port using
tie wrap.
® T K
RANSITION IT
2 E H
NSTALLING XTERIOR OODS
CAUTION
VJ0043 VJ0041
Pull the insulation
Pull the vapor barrier
over the joint and
over the insulation
tuck in between the and over the outer
inner and outer rings ring of the double collar.
of the double collar.
Make sure the vapor
barrier
insulated
does not tear during
installation to avoid
condensation within
the ducts.
CAUTION
.
- 13 -
VJ0042
Apply duct tape to the
joint making an airtight
seal. Avoid compressing
the insulation when
pulling the tape tightly
CAUTION around
Compressed insulation
loses its R value and
on the
causes water dripping
ducts
due to condensation
on the exterior surface
of the duct.
9 3/4"
248 mm
VD0118
the joint.
8 3/4"
222 mm