3
viking range corporation
D3 Downdraft Ventilators
1. The interior down-
draft blower system is
designed for use with
3-1/4" x 10" ductwork
(can be transitioned
to 6" round). Three
different discharge
directions are avail-
able with side-to-
side adjustment for
accurate alignment of
ductwork.
2. For best performance:
Choose the ducting
option which allows
the shortest length
of ductwork and a
RIGHT
DISCHARGE
DOWN DISCHARGE
LEFT
DISCHARGE
pLan tHe DUctWork
Interior Blower Installation
Exterior Blower Installation
10" ROUND
DISCHARGE
PLATE
1. The exterior downdraft
blower system is designed
for use with 10" round duct-
work.
2. For best performance:
Plan ducting which has the
shortest length of ductwork
and a minimum number of
elbows. Check location of
floor joists, wall studs, elec-
trical wiring or plumbing for
possible interference.
EQUALS 6 FT. OF
STRAIGHT DUCT
10" ROUND
ELBOW
EQUALS 6 FT. OF
STRAIGHT DUCT
6" ROUND
ELBOW
EQUALS 8 FT. OF
STRAIGHT DUCT
3. The system will operate most efficiently when the ductwork
does not exceed 40 feet of equivalent duct. The chart, above,
shows equivalent feet of elbows and transitions. The number
of feet of straight duct plus the equivalent feet of transitions
and/or elbows to be used should equal 40 feet or less.
note: the equivalent feet of various roof and wall caps has
been taken into consideration. Do not include them in this
calculation.
3-1/4" X 10" TO 6" RD.
TRANSITION
3-1/4" X 10"
90
O
ELBOW
minimum number of elbows and transitions. Check location
of floor joists, wall studs, electrical wiring or plumbing for
possible interference.
3. The system will operate most efficiently when the ductwork
does not exceed 40 feet of equivalent duct. The illustration,
above, shows equivalent feet of a 10" round elbow. The number
of feet of straight duct plus the equivalent feet of elbows to be
used should equal 40 feet or less.
note: the equivalent feet of various roof and wall caps has
been taken into consideration. Do not include them in this
calculation.
Interior Blower Installation
Exterior Blower Installation
take MeaSUreMentS
(continUeD)
EQUALS
2 FT. OF
STRAIGHT DUCT
SiDe vieW
oF DoWnDraFt
WitH
viDv500
interior
BLoWer
SiDe vieW
oF DoWnDraFt
WitH
10" roUnD eLBoW
(for connection
to veDv900
or veDv1200
(DIPR150RSS only)
)
VIDV500
INTERIOR
BLOWER
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