CarAlarms.com P90-NG1 - Manual (Page 25)

Excalibur ® P90 Zero Clearance Direct Vent Gas Fireplace 25
2) Set the gas appliance in its desired location.
Drop a plumb bob down from the ceiling to the
position of the appliance fl ue 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.
Diagram 3
Diagram 5
Diagram 1
Diagram 2
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. Silicone (red RTV) is optional.
Diagram 5
Diagram 6
VERTICAL
TERMINATIONS
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 siding
covered wall, a vinyl siding standoff
or furring strips must be used to
ensure that the termination is not
recessed into the siding.
7) Before connecting the horizontal run of vent
pipe to the vent termination, slide the Wall
Thimble (Part # 620-926) 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 suffi cient 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 assembly 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).
3) A Firestop spacer must be installed in the
fl oor or ceiling of every level. To install the
Firestop spacer in a fl at ceiling or wall,
cut a 10 inch square hole. Frame the hole
as shown in Diagram 3 and install the
fi restop.
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 suffi cient size to meet
the minimum requirements for clearance
to combustibles of 1-1/2". Slip the fl ashing
under the shingles (shingles should overlap
half the fl ashing) as per Diagram 4.
Diagram 4: The upper half of the fl ashing is
installed under the roofi ng 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 roofl ine
due to its higher corrosion resistance. Continue
to add pipe sections through the fl ashing until
the height of the vent cap meets the minimum
height requirements specifi ed in Diagram 5 or
local codes. Note that for steep roof pitches,
INSTALLATION
Roof Pitch Minimum Vent Height
Feet Meters
fl at 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
1) M a i n t a i n t h e 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 the "Rigid
Pipe Venting Systems"
& "Rigid Pipe Venting
Arrangements" sections for
the maximum vertical rise of
the venting system and the
maximum horizontal offset
limitations.