Step 3 Ducting Installation - Thermador VTR1000Q Installation Instructions Manual

d ) Construct the bottom wood framing with 2" x 4"s as
shown in Fig. 4. The center of the frame must have
an opening of 10" x 23" for the transition duct.
e ) The overall length of the structural framing will
depend on the size of the island hood. Attach 2"
x 4" wood frame onto the ends of 2" x 6" so that
their outer edges are 47" apart for 48" hood, or 59"
apart for a 60" hood. See Figure 2.
NOTE: Because of the weight of the
hood, we are recommending that you
use metal joint straps to connect the
ends of wood framing per example of
Figure 4.
f ) Using 2" x 6" wood, construct the bottom framing
for duct opening at the center bottom of the soffit. The
duct opening must be 8" x 23" as shown in Fig. 7.
STEP 2
INSTALL HOOD ASSEMBLY
a ) Install the transition (provided) to the top of the
hood using #8 x 1/2" Philips head screws. Tape all
joints, with duct tape.
b ) Locate and mark the centerlines of the hood soffit
framing and hood assembly.
lines and secure the hood assembly with 8 pieces
- 1/4" diameter x 1-1/2" long lug bolts with taps
and 2" x 2" x 1 1/2" angle brackets.
STEP 3
DUCTING INSTALLATION
a ) Run 10" round duct work from the remote ventilator
Model #VTR1000Q or Model #VTR1400Q (pur-
chase separately) to the transition (provided with
the hood). See Figure 1.
b ) Seal all joints with duct tape. Use straight duct if
possible or, if necessary, the fewest elbows for
best performance.
Fig. 4
Align both center
Fig. 5
PAGE 5
See Detail "A"
Detail "A"
Transition
Provided
NOTE:
COLD WEATHER installations
should have an additional backdraft damper
installed to minimize backward cold air flow.
A nonmetallic thermal break can be installed
to minimize conduction of outside tempera-
ture as part of the ductwork. The damper
should be on the cold air side of the thermal
break. The break should be as close as
possible to where the ducting enters the
heated portion of the house.
2" x 4" Frame