Installing Duct Collars Exhaust Duct Collars; Integral Supply Duct Collars - Accurex XB Installation, Operation And Maintenance Manual

Back and Front Clearance Reduction Options
One inch (2.54 cm) layer of insulation in 3 in. (7.62 cm)
back stand-off meets zero inch requirements for
clearance to combustible surfaces as outlined under the
clearance reduction methods.
Three inches (7.62 cm) uninsulated back stand-off
meets NFPA 96 requirements for clearance to limited
combustible surfaces.
One inch (2.54 cm) layer of insulation factory-installed
on the front of the hood (optional) meets zero inch
requirements for clearance to combustible surfaces.
End Clearance Reduction Options
One inch (2.54 cm) layer of insulation factory-installed
on the end of the hood (optional) meets zero inch
requirements for clearance to combustible surfaces
under the clearance reduction methods.
Three inches (7.62 cm) uninsulated airspace installed on
end of hood (optional). Meets NFPA 96 requirements for
clearance to limited combustible surfaces.
8 Kitchen Hoods • Type I and Type II
Installing Duct Collars
Exhaust Duct Collars
1. The exhaust duct connection needs to be located
within 48 in. (121.92 cm) from the center of the hood
length to the center of the duct connection and
within shaded area as shown.
Top View of the Hood
Hanger Bracket
Exhaust Plenum
Supply Plenum
8 in.
Hood Length
Back View of the Hood
8 in.
Hood Top
1 in.
12 in.
2. The exhaust duct connection is to be a continuous
liquid-tight weld. Weld with a non-ferrous filler wire,
such as silicon bronze or stainless steel filler wire.
Protect all stainless steel areas from weld splatter.

Integral Supply Duct Collars

1. The supply duct connection needs to be located
within the shaded Supply Plenum area as in the
drawing above.
2. The supply duct connection is tack-welded at 1 to
2 inch (2.54 to 5.08 cm) intervals or sheet metal
screws at 3 to 6 in. (7.62 to 15.24 cm) spacing to
the hood.
Supply Duct
Connection
3. For hoods that are insulated, the edges of the
insulation must be taped after the hole is cut. (The
insulation tape
Internal Supply
is provided by
Chamber
others).
4. On combination
hoods, make
certain the
fire damper
is located
over the
internal supply
chamber.
Duct cut out area
Front of hood
8 in.
Exhaust Plenum
Duct cut out area
Supply duct connection to be tack
welded with 1 to 2 inch tack or
sheet metal screws at 3 to 6 inch
spacing to hood.
Supply Fire Damper
Exhaust Capture
3 in.
14 in.
Hood
Width
16 in.
3 in.
8 in.
Hood
Insulated
Supply
Plenum