Flueing - Vertical Termination - Masport FireGenie PG33-NG Owners & Installation Manual

1) Maintain the 1-1/2" (38mm) 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 pages 13-17 for the max-
imum vertical rise of the flueing 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 flue will pene-
trate 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 flue 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.
Diagram 2
Masport PG33 Gas Inbuilt
VERTICAL TERMINATION
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: Apply sealant "Mill-Pac" to inner
pipe and high temperature sili-
cone sealant to outer pipe on every
twist-lock joint.
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 com-
bustibles of 1-1/2" (38mm). Slip the flashing
under the shingles (shingles should over-
lap 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 adjustments.
6) Continue to assemble pipe lengths.
Note: If an offset is necessary in the attic
to avoid obstructions, it is impor-
tant to support the flue pipe every
3' (0.9m), to avoid excessive stress
on the elbows, and possible sep-
aration.
for this purpose.
Wall straps are available
INSTALLATION
Galvanized pipe is desirable above the roof-
line due to its higher corrosion resistance.
Continue to add pipe sections through the
flashing until the height of the flue 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 adjoin-
ing roof lines, in these cases, increasing the
flue height may solve the problem.
7) Ensure flue 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.
Diagram 4
Roof Pitch Minimum Flue Height
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
8) Install the vertical termination cap by twist-
locking it.
Note: Any closets or storage spaces, which
the flue passes through must be en-
closed.
Meters
0.61
0.61
0.61
0.76
0.99
1.22
1.52
1.83
2.13
2.29
2.44
25