18
Double Wall Connection to Riser
1. After the riser has been installed, see “Factory and Field (Bolted and Welded) Risers” on page 17,
connect the double wall section to the riser.
2. Connect the duct/chimney section to the riser, refer to steps 1 through step 3 in “Grease Duct and
Chimney Joint Assembly” on page 11.
3. After the riser and inner section(s) have been connected, install the provided insulation. Make sure all
voids are filled.
4. Install the riser covers by pushing the two halves together and secure with provided sheet metal
screws. Use only hardware provided, longer screws may penetrate the inner section(s).
5. Place the outer V-band around the double wall duct/chimney shell flange and riser cover. Make sure
the V-band engages the outer shell flange and overlaps the riser before tightening.
6. The slot in the riser cover provides an opening for the installation of duct stat sensors if required.
Figure 9 - Duct to Riser Connection
7
1
2
3
4
5
6
4
Inner Section
Assembled
Outer Section
Assembled
1. Double Wall Duct/Chimney
2. Inner V-band - Connecting riser to inner
section
3. Outer V-band - Connecting riser cover to
double wall section
4. Riser Cover
5. Insulation
6. Sheet Metal Screws
7. Opening for Duct Stat Installation
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