Prepare Rear Wall For Outside Back Exhaust; Hood Exhaust - GE JVM2052 Installation Instructions Manual

Installation Instructions
NOTE: If gou need to install ducts, note that the total duct
length of 5W' x 10" rectangular or 6" diameter round duct
should not e×ceed 120 equivalent feet.
Outside ventilation requires a HOOD EXHAUSTDUCT.
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 freelg
and nothing is blocking the ducts.
Exhaust connection:
The hood exhaust has been designed to mate with
a standard 5V_"x 10" rectangular duct.
If a round duct is required, a rectangular-to-round
transition Adapter must be used. Do not use less
than a 6" diameter duct.
Maximum duct length:
For satisfactory air movement, the total duct length
of 3V_"x 10" rectangular or 6" diameter round duct
should not exceed 120 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 phgsical size. When calculating the total duct
length, add the equivalent lengths of all transitions and
adapters plus the length of all straight duct sections.
The chart below shows gou how to calculate total
equivalent ductwork length using the approximate
feet of equivalent length of some tgpical ducts.
DUCT PIECES
@
0
J
Rectangular-t0-R0und
TransitionAdapter . ×-
Wall Cap
90° Elbow
45° Elbow
90° Elbow
45° Elbow
RoofCap
Straight Duct6" Roundor
3_¼" x 10"Rectangular
EQUIVALENT
LENGTH
5 Ft.
40 Ft.
10 Ft.
5 Ft.
25 Ft.
5 Ft.
24 Ft.
1 Ft.
NUMBER
USED
( )
( )
( )
( )
( )
( )
( )
( )
EQUIVALENT
LENGTH
Ft.
Ft.
Ft.
Ft.
Ft.
Ft.
Ft.
Ft.
m
m
Total Ductwork = Ft.
Equivalent lengths of duct pieces are based on actual tests
and reflect requirements for good venting performance with
ang vent hood.
* IMPORTANT:If a rectangular-to-round transition
Adapter 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.
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