Grandview® G800C Gas Fireplace
| 55
installation
Diagram 3
Diagram 5
Diagram 2
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
NOTE: For best results and optimum
performance 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.
Diagram 5
Diagram 6
Unit Installation with Vertical
Termination
1. Maintain the 1-1/4" 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 for the
maximum vertical rise of
the venting system and the
maximum horizontal offset
Diagram 7
The four wood screws provided should
be replaced with appropriate fasteners for
stucco, brick, concrete, or other types of
sidings.
Note: If installing termination on a sid-
ing covered wall, a vinyl siding
standoff or furring strips must
be used to ensure that the ter-
mination is not recessed into the
siding.
7. Before connecting the horizontal run of vent
pipe to the vent termination, slide the Wall
Thimble over the vent pipe.
8. Slide the appliance and vent assembly
towards the wall carefully inserting the
vent pipe into the vent cap assembly. It is
important that the vent pipe extends into the
vent cap sufficient distance so as to result
in a minimum pipe overlap of 1-1/4 inches.
Secure the connection between the vent pipe
and the vent cap by attaching the two sheet
metal strips extending from the vent cap as-
sembly into the outer wall of the vent pipe.
Use the two sheet metal screws provided
to connect the strips
to the pipe section.
See Diagram 6.
9. Install wall thimble in
the center of the 10"
square and attach
with wood screws
(Diagram 7).
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
Diagram 1
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 v e n t i n g
system. You
may wish to
relocate the
a p p l i a n c e
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. To install the
Firestop spacer in a flat ceiling or wall, cut
a 10 inch square hole. Frame the hole as
shown in Diagram 3 and install the firestop.
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.
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 4.
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 4: 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 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
(Diagram 2).
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 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.
