Hotpoint RVM5160MPSA Installation Instructions - Page 4

Exhaust connection, Maximum duct length, Elbows, transitions, wall and roof caps

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Installation Instructions NOTE: If you need to install ducts, note that the total duct length of 31»4Ǝ[ƎUHFWDQJXODURUƎGLDPHWHUURXQG duct should not exceed 140 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 31»4Ǝ[ƎUHFWDQJXODUGXFW If a round duct is required, a rectangular-to-round transition adaptor must be used. Do not use less than a 6Ǝ diameter duct. Maximum duct length: For satisfactory air movement, the total duct length of 31»4Ǝ[ƎUHFWDQJXODURUƎGLDPHWHUURXQGGXFWshould not exceed 140 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 LENGTH x USED = LENGTH Rectangular-to-Round 5 Ft. x ( ) = Ft. Transition Adaptor* Wall Cap 40 Ft. x ( ) = Ft. 90° Elbow 10 Ft. x ( ) = Ft. 45° Elbow 5 Ft. x ( ) = Ft. 90° Elbow 25 Ft. x ( ) = Ft.   4 45° Elbow 5 Ft. x ( ) = Ft. Roof Cap 24 Ft. x ( ) = Ft. 6WUDLJKW'XFWƎ5RXQGRU 31»4Ǝ[Ǝ5HFWDQJXODU )W  [       )W * 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. Total Ductwork = Ft. Equivalent lengths of duct pieces are based on actual tests and reflect requirements for good venting performance with any vent hood. 31-7000091 Rev. 2

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4
31-7000091
Rev. 2
Installation Instructions
EQUIVALENT
NUMBER
DUCT PIECES
LENGTH
x
USED
=
LENGTH
Rectangular-to-Round
5 Ft.
x
(
)
=
Ft.
Transition Adaptor*
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.
3
1
4
Total Ductwork
=
Ft.
Equivalent lengths of duct pieces are based on actual tests
and reflect requirements for good venting performance with
any vent hood.
*
IMPORTANT: I
f 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
.
NOTE:
If you need to install ducts, note that the total
duct length of 3
1
4
duct
should not exceed 140 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 3
1
4
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
3
1
4
should
not exceed 140 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.