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installation
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38
UNIT INSTALLATION WITH
VERTICAL TERMINATION
4" X 6-5/8" VENTING
(Rigid Vent Systems)
1.
Maintain the 1-1/2" clearances (air spaces)
to combustibles when passing through ceilings,
walls, roofs, enclosures, attic rafter, or other
nearby combustible surfaces. Do not pack air
spaces with insulation. Check "Venting" Sec-
tions for the maximum vertical rise of the venting
system and the maximum horizontal offset
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 this 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.
3. A Firestop spacer must
be installed in the floor or
ceiling of every level. To
install the Firestop spacer in a flat ceiling or
wall, cut a 10 inch square hole. Frame the hole
as shown in Diagram 2 and install the firestop.
Note: All vertical terminations are vented
using 4" x 6-5/8" venting and rigid pipe
adaptor #510-994.
Diagram 2
38 |
Regency Horizon ® HZ40E-10 Gas Fireplace
4. Assemble the desired lengths of pipe and
elbows. Ensure that all pipes and elbow con-
nections are in the fully twist-locked position
and sealed.
NOTE: For best results and optimum perfor-
mance with each approved venting system, it is
highly recommended to apply "Mill-Pac" sealant
(supplied) 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". Slip the flashing under the shingles
(shingles should overlap half the flashing) as
per Diagram 3.
Diagram 1
Diagram 3: The upper half of the flashing is installed
under the roofing material and not nailed down
until the chimney is installed. This allows for small
6. Continue to assemble pipe lengths.
Note: If an offset is necessary in the attic to
avoid obstructions, it is important to
support the vent pipe every 3 feet, to
avoid excessive stress on the elbows,
and possible separation. Wall straps
are available for this purpose.
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 Dia. 4 or local codes.
Note that for steep roof pitches, the vertical
height must be increased. 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.
adjustments.
Diagram 4
Minimum Vent Height
Roof Pitch
Feet
flat to 7/12
2
over 7/12 to 8/12
2
over 8/12 to 9/12
2
over 9/12 to 10/12
2.5
over 10/12 to 11/12
3.25
over 11/12 to 12/12
4
over 12/12 to 14/12
5
over 14/12 to 16/12
6
over 16/12 to 18/12
7
over 18/12 to 20/12
7.5
over 20/12 to 21/12
8
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.
Meters
0.61
0.61
0.61
0.76
0.99
1.22
1.52
1.83
2.13
2.29
2.44
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