Maytag MMV5165BAW Installation Instructions - Page 5

Installation, Instructions, Maximum, length

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Installation Instructions NOTE: If you need to install ducts, note that the total duct length of 3¼" x 10" rectangular or 6" diameter round duct should not exceed 60 equivalent feet. Outside ventilation requires a HOOD EXHAUST DUCT. Read the following carefully. NOTE: It is important that venting be installed using the most direct route and with as few elbows as possible. This ensures clear venting of exhaust and helps prevent blockages. Also, make sure dampers swing freely and nothing is blocking the ducts. Exhaust connection: The hood exhaust has been designed to mate with a standard 3¼"x 10" rectangular duct. If a round duct is required, a rectangular-to-round transition adaptor must be used. Do not use less than a 6" diameter duct. Maximum duct length: For satisfactory air movement, the total duct length of 3¼" x 10" rectangular or 6" diameter round duct should not exceed 60 equivalent feet. Elbows, transitions, wall and roof caps, etc., present additional resistance to airflow and are equivalent to a section of straight duct which is longer than their actual physical size. When calculating the total duct length, add the equivalent lengths of all transitions and adaptors plus the length of all straight duct sections. The chart below shows you how to calculate total equivalent ductwork length using the approximate feet of equivalent length of some typical ducts. DUCT PIECES EQUIVALENT LENGTH x NUMBER USED EQUIVALENT = LENGTH Transition Adaptor* 5 Ft. x ( = Ft. Rectangular-to-Round Wall Cap 40 Ft. x ( = Ft. (_ 90 ° Elbow 10 Ft. x ( = Ft. (_ 45 ° Elbow 5 Ft. x ( = Ft. 90 ° Elbow 25 Ft. x ( = Ft. 45 ° Elbow 5 Ft. x ( = Ft. Roof Cap 24 Ft. x ( = Ft. 3¼" x 10" Rectangular 1 Ft. x ( = Ft. -1 Straight Duct 6" Round or Total Ductwork = Ft. * IMPORTANT: If a rectangular-toround transition adaptor is used, the bottom corners of the damper will have to be cut to fit, using the tin snips, in order to allow free movement of the damper. Equivalent lengths of duct pieces are based on actual tests and reflect requirements for good venting performance with any vent hood. 5

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Installation
Instructions
NOTE:
If you need to install
ducts,
note that the total
duct
length
of 3¼" x 10" rectangular
or 6" diameter
round
duct
should
not exceed
60 equivalent
feet.
Outside
ventilation
requires
a HOOD
EXHAUST
DUCT.
Read
the following
carefully.
NOTE:
It is important
that
venting
be installed
using
the most
direct
route
and with
as few elbows
as
possible.
This
ensures
clear
venting
of exhaust
and
helps
prevent
blockages.
Also,
make
sure
dampers
swing
freely
and
nothing
is blocking
the
ducts.
Exhaust
connection:
The
hood
exhaust
has been
designed
to mate
with
a
standard
3¼"x
10" rectangular
duct.
If a round
duct
is required,
a rectangular-to-round
transition
adaptor
must
be used.
Do
not
use
less
than
a 6" diameter
duct.
Maximum
duct
length:
For satisfactory
air movement,
the total duct length
of
3¼" x 10" rectangular
or 6" diameter
round
duct
should
not exceed
60 equivalent
feet.
Elbows,
transitions,
wall
and
roof
caps,
etc.,
present
additional
resistance
to
airflow
and are equivalent
to a section
of straight
duct
which
is longer
than their
actual
physical
size.
When
calculating
the total duct
length,
add the equivalent
lengths
of all transitions
and adaptors
plus the length
of all straight
duct
sections.
The
chart
below
shows
you how to calculate
total equivalent
ductwork
length
using
the approximate
feet
of equivalent
length
of
some
typical
ducts.
DUCT
PIECES
EQUIVALENT
NUMBER
EQUIVALENT
LENGTH
x
USED
=
LENGTH
Rectangular-to-Round
Transition
Adaptor*
5 Ft.
x
(
=
Ft.
Wall
Cap
40 Ft.
x
(
=
Ft.
(_
90 ° Elbow
10 Ft.
x
(
=
Ft.
(_
45 ° Elbow
5 Ft.
x
(
=
Ft.
90 ° Elbow
25 Ft.
x
(
=
Ft.
45 ° Elbow
5 Ft.
x
(
=
Ft.
Roof
Cap
24 Ft.
x
(
=
Ft.
-1
Straight
Duct
6" Round
or
3¼" x 10" Rectangular
1 Ft.
x
(
=
Ft.
Total
Ductwork
=
Ft.
*
IMPORTANT:
If a rectangular-to-
round
transition
adaptor
is used,
the
bottom
corners
of the damper
will
have
to be cut to fit, using
the tin
snips,
in order
to allow
free
movement
of the damper.
Equivalent
lengths
of duct pieces
are based on actual
tests
and reflect
requirements
for good
venting
performance
with
any vent
hood.
5