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installation
|
30
unit installation
WitH Vertical
terMination
(Rigid Vent Systems)
Note: A clearance of 2"(51mm) must be
maintained; except when passing
through a wall, ceiling, or at the
termination where the use of 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)
t o c o m b u s t i b l e s w h e n
passing through ceilings,
walls, roofs, enclosures,
attic rafter, or other nearby
combustible surfaces,
ensuring that the use of
a firestop or wall thimble
is used as noted above.
Do not pack air spaces
with insulation. Check
"Venting Arrangement
- Vertical Termination"
section for the maximum
vertical rise of the venting
system and the maximum
h o r i z o n t a l o ff s e t
limitations.
2) Set the gas appliance
in its desired location.
Drop a plumb bob
down from the ceiling
to the position of the
appliance flue exit,
and mark the location
where the vent will
penetrate the ceiling.
Drill a small hole at
his point. Next, drop
a plumb bob from
the roof to the hole
previously drilled in the ceiling, and mark the spot
where the vent will penetrate the roof. Determine
if 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.
Diagram 3
30 |
Regency Horizon HZ54E-10 Gas Fireplace
4) Assemble the desired lengths of pipe and elbows.
ensure that all pipes and elbow connections are
in the fully twist-locked position and sealed.
note:
For best results and optimum performance
with each approved venting system, it is highly
recommended to apply "Mill-Pac" sealant to
every inner pipe connection. Failure to do so
may result in drafting or performance issues
not covered under warranty.
5) Cut a hole in the roof centered on the small
drilled hole placed in the roof in Step 2. The hole
should be of sufficient size to meet the minimum
requirements for clearance to combustibles of
1-1/2"(38mm). Slip the flashing under the shingles
(shingles should overlap half the flashing) as per
Diagram 4.
Diagram 1
Diagram 4: The upper half of the flashing is
installed under the roofing material and not
nailed down until the chimney is installed.
Diagram 2
6) Continue to assemble pipe lengths.
Note: If an offset is necessary in the attic to
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.
This allows for small adjustments.
avoid obstructions, it is important to
support the vent pipe 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).
Diagram 5
Minimum Vent
Roof Pitch
feet
flat to 7/12
over 7/12 to 8/12
over 8/12 to 9/12
over 9/12 to 10/12
2.5
over 10/12 to 11/12
3.25
over 11/12 to 12/12
over 12/12 to 14/12
over 14/12 to 16/12
over 16/12 to 18/12
over 18/12 to 20/12
7.5
over 20/12 to 21/12
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
storm collar over the pipe section and seal with
a mastic.
8) Install the vertical termination cap by twist-
locking it.
Note: Any closets or storage spaces, which the
vent passes through must be enclosed.
Offset Chart
Height
Meters
2
0.61
2
0.61
2
0.61
0.76
0.99
4
1.22
5
1.52
6
1.83
7
2.13
2.29
8
2.44
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