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D. Disassemble Vent Sections
• Rotate either section (see Figure 7.10) so the seams on
both pipe sections are aligned as shown in Figure 7.11.
• Pull carefully to separate the pieces of pipe.
Figure 7.10 Rotate Seams for Disassembly
Figure 7.11 Align and Disassemble Vent Sections
40
Heatilator • NNXT33-IFT, NNXT33L-IFT, NNXT36-IFT, NNXT36L-IFT Installation Manual • 2628-980 Rev. C • 8/20
E. Vertical Termination Requirements
Install and Seal Metal Roof Flashing
• See minimum vent heights for various pitched roofs
(Section 4, Figure 4.1) to determine the length of pipe
to extend through the roof.
• Slide the roof flashing over the pipe sections extending
through the roof as shown in Figure 7.12.
• Use an elastomeric or silicone sealant with a minimum of
150 ºF temperature rating to seal the metal roof flashing.
NOTICE: Failure to properly seal the roof flashing and pipe
seams could permit entry of water.
• Seal the gap between the roof flashing and the outside
diameter of the pipe.
• Seal the perimeter of the flashing where it contacts the
roof surface. See Figure 7.12.
• Seal the exposed pipe section seams that are located
above the roof.
Figure 7.12
Assemble and Install Storm Collar
CAUTION! Risk of Cuts, Abrasions or Flying Debris.
Wear protective gloves and safety glasses during instal-
lation. Sheet metal edges are sharp.
•
Slide the storm collar onto the exposed pipe section
and align brackets.
•
Insert a bolt (provided) through the brackets and install
nut. Do not completely tighten.
SEAL
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