GE JGP990WELWW Owners Manual - Page 23

Prepare For Ductwork, Blower To Ductwork, Alignment

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Installation Instructions PREPARATION 6 PREPARE FOR DUCTWORK NOTE: Ductwork MUST be vented outside. DO NOT vent into a wall, ceiling, crawlspace, attic or any concealed space. Determine the best route for ductwork; it can be routed in a variety of ways depending on the kitchen layout. IMPORTANT: The downdraft air discharge outlet for this unit is 3-1/4″ x 10″ rectangular. Plan ducting accordingly. Typical duct arrangement countertop series. Inside wall cabinet Outside wall cabinet 7 BLOWER TO DUCTWORK ALIGNMENT In general, the use of flexible ducting is discouraged because it can cause severely restricted airflow. However, if the blower outlet and the floor or wall duct location do NOT align well, then flexible METAL ducting can be used to adapt to an offset. Good alignment without use of flexible ducting is best. NOTE: Do not exceed the maximum recommended offset of 6″. Do not allow the flexible ducting to kink or collapse. Do stretch the flexible ducting as much as possible to eliminate as much of the corrugation as possible. Up inside wall to roof or overhang Peninsula or island Directly to outside Peninsula Between floor joists Through cabinet toe space Optional duct arrangement under concrete slab. PVC duct should be used if installing under a poured concrete slab. NOTE: PVC sewer pipe type PSM 12454-B Schedule 40 ASTM D1785. 6″ (15 cm) Dia. 90° Metal Elbow Wall Cap 6″ (15 cm) Dia. Metal Duct 3-1/4″ x 10″ Rectangular to 6″ Round Transition Concrete Slab 6″ (15 cm) Dia. Metal Duct 12″ (30 cm) Min. 6″ (15 cm) Dia. PVC Coupling 6″ (15 cm) Dia. PVC Sewer Pipe Elbow 16″ (40.6 cm) Max. 6″ (15 cm) Dia. PVC Sewer Pipe 30′-0″ (9.14 m) Max. Pack tightly with gravel or sand completely around pipe 6″ (15 cm) Dia. PVC Sewer Pipe Elbow 6″ (15 cm) Dia. PVC Coupling 6″ (15 cm) Dia. PVC Sewer Pipe 23 6″ Max. Centerline to Centerline Offset Bottom Venting Back Venting (Requires 31/4″ x 10″) A 31⁄4″ x 10″ rectangle to 6″ round transition duct is available at your local building supply store. NOTE: Illustrations are for planning purposes only.

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PREPARE FOR DUCTWORK
NOTE:
Ductwork MUST be vented outside. DO NOT
vent into a wall, ceiling, crawlspace, attic or any
concealed space.
Determine the best route for ductwork; it can
be routed in a variety of ways depending on
the kitchen layout.
IMPORTANT:
The downdraft air discharge outlet
for this unit is 3-1/4
″
x 10
″
rectangular. Plan ducting
accordingly.
Typical duct arrangement countertop series.
23
Installation Instructions
BLOWER TO DUCTWORK
ALIGNMENT
In general, the use of flexible ducting is discouraged
because it can cause severely restricted airflow. However,
if the blower outlet and the floor or wall duct location do
NOT align well, then flexible METAL ducting can be used
to adapt to an offset. Good alignment without use of
flexible ducting is best.
NOTE:
Do not exceed the maximum recommended offset
of 6
″
.
Do not allow the flexible ducting to kink or collapse.
Do stretch the flexible ducting as much as possible
to eliminate as much of the corrugation as possible.
A 3
1
⁄
4
″
x 10
″
rectangle to 6
″
round transition duct
is available at your local building supply store.
NOTE:
Illustrations are for planning purposes only.
Inside wall
cabinet
Up inside wall to roof
or overhang
Directly to outside
Between floor joists
Through cabinet toe space
Peninsula or island
Peninsula
Outside wall
cabinet
NOTE:
PVC sewer pipe type PSM 12454-B
Schedule 40 ASTM D1785.
Wall Cap
Concrete
Slab
6
″
(15 cm)
Dia. PVC
Sewer Pipe
6
″
(15 cm)
Dia. Metal
Duct
Pack tightly with gravel
or sand completely
around pipe
3-1/4
″
x 10
″
Rectangular
to 6
″
Round Transition
6
″
(15 cm)
Dia. 90
°
Metal Elbow
6
″
(15 cm) Dia.
Metal Duct
16
″
(40.6 cm)
Max.
12
″
(30 cm)
Min.
6
″
(15 cm)
Dia. PVC
Coupling
6
″
(15 cm) Dia.
PVC Sewer Pipe
Elbow
6
″
(15 cm) Dia.
PVC Sewer Pipe
Elbow
6
″
(15 cm)
Dia. PVC
Sewer
Pipe
6
″
(15 cm)
Dia.
PVC
Coupling
30
′
-0
″
(9.14 m) Max.
6
Optional duct arrangement under concrete slab.
PVC duct should be used if installing under a poured
concrete slab.
7
PREPARATION
Back Venting
(Requires 3
1
/
4
″
x 10
″
)
Bottom Venting
6
″
Max.
Centerline
to Centerline
Offset