Hood Exhaust Duct - Amana MWT4461D Installation Instructions Manual

Materials Needed (Not Supplied)
• Phillips screwdriver
• Pencil
• Ruler or tape measure and straight edge
• Protective gloves
• Carpenter square (optional)
• Tin snips (in some applications)
• Electric drill with 1/8 inch, 3/16 inch and 5/8 inch drill
bits
• Hammer
• Stud finder (optional)
• Filler blocks, if needed for top cabinet spacing
• Saw (jig or keyhole)
• Charcoal filter kit (for inside recirculating installation)
•
Filler panel kit (if space between cabinets is greater
than 30 inches)
Materials Needed (Supplied)
Installation hardware is contained in packet shipped with
microwave oven. Verify all parts listed below are included
in packet.
4x2 inch Wood
Screws
3/16 inch Toggle
Bolts
1/4 inch screws
Hardware
4 inch x 2 inch Wood Screws
3/16 inch Toggle Bolts (and spring loaded nuts)
1/4 inch Screws
Washers
Nylon Grommet (for metal cabinets)
28 inch Pieces of Foam Tape
Rectangular Washer
Top Cabinet Template*
Separately Packed Grease Filter*
* Not Shown
Accessories Available for Purchase from
Dealer
•
Charcoal filter kit: Charcoal filter kit is needed for
recirculating exhaust installation.
•
Filler panel kit: If space between cabinets is greater
than 30 inches, filler panel kit may be used to fill in gap
between microwave oven and cabinets.
Washers
28 inch Pieces of
Foam Tape
Rectangular Washer
Quantity
2
4
3
3
2
2
1
1
2

Hood Exhaust Duct

Outside ventilation requires hood exhaust duct. Use only
metal duct. Read the following carefully.
Exhaust Connection: Hood exhaust has been designed
to mate with standard 3 1/4 inch x 10 inch rectangular duct.
If round duct is required, rectangular-to-round transition
adaptor must be used. Do not use less than 6 inch
diameter duct.
Rear Exhaust: If rear or horizontal exhaust is to be used,
care should be taken to align exhaust with space between
studs.
Maximum Duct Length: Total duct length of 3 1/4 inch x
10 inch rectangular or 6 inch diameter round duct should
not exceed 140 equivalent feet for satisfactory air
movement.
Elbows, Transitions, Wall and Roof Caps, Etc.
Elbows, transitions, wall and roof caps, etc., create
additional resistance to airflow and are equivalent to a
section of straight duct. When calculating total duct length,
add equivalent lengths of all transitions and adaptors, plus
length of all straight duct sections. Chart below shows
approximate feet of equivalent length of some typical
ducts.
Duct
Rectangular-to-Round Transition
Adaptor
Wall Cap
90° Elbow
45° Elbow
90° Elbow
45° Elbow
Roof Cap
* If rectangular-to-round transition adaptor is used, bottom
corners of damper will have to be cut to fit, using tin
snips, in order to allow free movement of damper.
3
Equivalent Length
5 FT.
40 FT
10 FT.
5 FT.
25 FT.
5 FT.
24 FT.