Greenheck Canopy Hoods (452413 IOM) - Manual (Page 8)

Kitchen Hoods • Type I and Type II 8
®
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.
Duct cut out area
Hood Top
Exhaust Plenum
8 in. 8 in.
1 in.
12 in.
Back View of the Hood
Hanger Bracket
Exhaust Plenum
Duct cut out area
Supply Plenum
Hood Length
Hood
Width
Front of hood 8 in. 3 in.
3 in.
16 in.
14 in.
8 in.
Top View of the Hood
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.
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.
3. For hoods that are insulated, the edges of the
insulation must be taped after the hole is cut. (The
insulation tape
is provided by
others).
4. On combination
hoods, make
certain the
fire damper
is located
over the
internal supply
chamber.
Supply Duct
Connection
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.
Internal Supply
Chamber
Supply Fire Damper
Insulated
Supply
Plenum
Exhaust Capture
Hood