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City Series CV72EPV
installation
Vertical Inline Power Vent Terminations
Rigid Pipe
Note:
A top clearance of 3"(76mm) and side
bottom clearance of 2" (51mm) must
be maintained, except when passing
through a wall or ceiling, or at the
termination where a firestop or wall
thimble reduces the required clearance
to 1-1/2" (38mm). We recommend
framing a 11"(279mm) x 11"(279mm)
(inside dimensions) hole to give
structural rigidity for mounting the
termination.
1)
Maintain the 1-1/2" (38mm)
clearances (air spaces)
to combustibles when
passing through ceilings,
walls, roofs, enclosures,
attic rafters, or other
n e a r by c o m b u s t i b l e
surfaces, ensuring a
firestop or wall thimble is
used as noted above. Do
not pack air spaces with
insulation. Check the
"Venting Arrangement
- Vertical Termination"
section for the maximum
vertical rise of the venting
system and the maximum
horizontal offset.
2)
Set the gas appliance in its the
desired location. Drop a plumb bob from the
ceiling to the appliance flue exit and mark where
the vent will penetrate the ceiling. Drill a small
hole at this point. Next, drop a plumb bob from
the roof to the hole drilled in the ceiling and mark
where the vent will penetrate the roof. Determine
whether ceiling joists,
roof rafters, or other
framing will obstruct
the venting system. You
may wish to relocate the
appliance or to offset as
shown in Diagram 2
to avoid cutting load
bearing members.
3)
A Firestop spacer must
be installed in the floor
or ceiling of every level.
plumber's
tape
connected
to wall strap
Ruban de
plombier
relié à
l’attache
murale
wall
strap
Attache
murale
45
o
Elbows
Coudes de 45
o
Firestop
Spacer
Espaceur
coupe-feu
walstrp.eps
walstrpf.eps
french
6)
Continue to assemble pipe lengths. Support
the inline power vent to avoid excessive
stress on the pipe and elbows. The inline
power vent can be screwed onto existing
studs for support.
Note: If an offset is needed in the attic, it
is important to support the vent pipe
at every 3 feet (0.9 meter) to avoid
excessive stress on the elbows and
possible separation. Wall straps are
available for this purpose (Diagram
2).
Galvanized pipe is desirable above the
roofline due to its higher corrosion resistance.
Continue to add pipe sections through the
flashing until the height of the vent cap meets
the minimum height requirements specified
in Diagram 5 or local codes. Note that for
steep roof pitches, the vertical height must
be increased.
Diagram 3
Note:
For best results and optimum performance
with each approved venting system, “Mill-
Pac” sealant is strongly recommended at
every inner pipe connection. Failure to use
Mill-Pac may result in drafting or perfor-
mance issues not covered under warranty.
4)
Assemble the desired pipes and elbows.
Ensure all pipes and elbow connections are
twist-locked and sealed.
5)
Cut a hole in the roof centered on the small
hole drilled in Step 2. The hole should be
sized to meet the minimum requirement of
1-1/2"(38mm) clearance to combustibles.
Slip the flashing under the shingles (shingles
should overlap half the flashing) as per
Diagram 4.
Offset Chart
A poor draft, or down drafting, can result from
high wind conditions near big trees or adjoining
roof lines. In these cases, increasing the vent
height may solve the problem.
7)
Ensure vent is vertical and secure the base
of the flashing to the roof with roofing rails.
Slide the storm collar over the pipe section
and seal with a mastic.
8)
Install and twist-lock the vertical termination
cap.
Note: Any closets or storage spaces that
the vent passes through must be
enclosed.
Diagram 5
Roof Pitch
Minimum
Vent Height
Feet Meters
flat to 7/12
2
0.61
over 7/12 to 8/12
2
0.61
over 8/12 to 9/12
2
0.61
over 9/12 to 10/12
2.5
0.76
over 10/12 to 11/12
3.25
0.99
over 11/12 to 12/12
4
1.22
over 12/12 to 14/12
5
1.52
over 14/12 to 16/12
6
1.83
over 16/12 to 18/12
7
2.13
over 18/12 to 20/12
7.5
2.29
over 20/12 to 21/12
8
2.44
Diagram 1
Diagram 2
Diagram 4 -The upper half of the flashing is
installed under the roofing material and not
nailed down until the chimney is installed, to
allow for small adjustments.
Inline PV
Terminal
A minimum of 4 feet is required between the unit
and the inline power vent. Determine the overall
height of the chimney from the top side of the
inline power vent to the underside of the flashing.
Summary of Contents for City CV72E Series
Page 113: ...City Series CV72EPV 113 notes ...
Page 118: ...118 City Series CV72EPV warranty ...
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