PENSOTTI PNCC-32N Instruction Manual page 39

5. Install CVS Vent Pipe. If your appliance
requires an Appliance Adapter, install it onto
the appliance. Twist-lock on the first section
of CVS vent pipe and continue to add vent
pipe sections for your installation. As the vent
passes through Firestop Supports, tighten the
supporting clamp around the vent pipe.
Any elbow offsets must be supported by Wall
Straps. Wall Straps must be used to support
any horizontal or inclined sections longer than
8-ft. Plumbers tape is allowed to be used to
support the vent pipe for interior offsets only, if
nearby walls/ceilings/framing members are not close
enough to use the Wall Straps. As the CVS vent passes
through the roof, install a Roof Support at the roof level to
hold the vent in place, if there are no Wall
Straps within 8-ft (Fig 7). The Roof Support is
clamped around the vent pipe and is secured
to the topside or underside of the roof with at
least (4) nails or wood screws.
6. Enclosures. Check with your local authority
for enclosure requirements when penetrating
a vent through an occupied area. Except for
the installation in one and two family dwellings,
a venting system that extends through any
zone above where the connected appliance
is located shall have an enclosure with a fire
resistance rating equal or greater than that
of the floor or roof assembly through which it
passes.
For exterior mounted systems, it is
recommended that the vent system
be enclosed below the roofline to limit
condensation and protect against possible
incidental damage that may occur to the vent
pipe.
7. Install Flashing and Vertical Termination.
Install enough vent pipe through the roof
penetration to allow the Adjustable Flashing to
fit over the pipe. The Adjustable Flashing will fit
roofs from 0/12-12/12 pitch. Slide the Flashing
over the vent pipe and secure to the roof.
The upper edge of the flashing should slide
under the uphill shingles/roofing material, if
applicable. Use appropriate roofing sealant to
weatherize the flashing to the roof, and secure
the flashing in place using at least (4) roofing
nails/screws per side of the flashing (Fig 7).
INSTALLATION INSTRUCTIONS
After the Flashing is installed, wrap the Storm
Collar around the vent pipe, inserting the tab and folding it
back to secure the collar tightly
against the pipe. A sheet metal screw may
be used to secure the tab in place. Slide the
Storm Collar down on top of the Flashing. Use
a bead of sealant where the Storm Collar sits
on the Flashing to prevent any rain infiltration.
The vent pipe must extend above the roof
a minimum of 12", but the installation must
also meet any additional height requirements
as specified in the appliance manufacturer's
installation instructions. Once the required
vent height has been reached, twist-lock the
Vertical Termination Cap onto the top section
of CVS vent pipe to complete the Vertical
Installation (Fig 7). If more than 4 feet of CVS
extends above the roof, then the vent pipe will
need to be supported.
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