Table of Contents
Advertisement
installation
|
42
UNIT INSTALLATION WITH
VERTICAL
TERMINATION
4" X 6-5/8" VENTING
(Rigid Vent Systems)
(
MUST USE REDUCER
#946-606 AND RIGID PIPE ADAPTOR
#770-994)
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" Sections
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
reducer #946-606 and rigid pipe
adaptor #770-994.
Diagram 2
42 |
Bellavista
®
B36XTCE-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 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.
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.
Diagram 4
Roof Pitch
Minimum Vent 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
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.
GAS LINE
INSTALLATION
The gas line is brought through the right side of
the appliance. The gas valve is situated on the
right hand side of the unit and the gas inlet is
on the right hand side of the valve.
The gas line connection may be made of rigid
pipe, copper pipe or an approved flex connector.
(If you are using rigid pipe, ensure that the valve
can be removed for servicing.) Since some
municipalities have additional local codes it is
always best to consult with your local authorities
and the CAN/CGA B149 installation code.
For USA installations follow local codes and/
or the current National Fuel Gas Code, ANSI
Z223.1.
When using copper or flex connectors use only
approved fittings. Always provide a union so
that gas lines can be easily disconnected for
servicing. Flare nuts for copper lines and flex
connectors are usually considered to meet this
requirement.
Important: Always check for gas leaks with a
soap and water solution or gas leak detector.
Do not use open flame for leak testing.
Meters
0.61
0.61
0.61
0.76
0.99
1.22
1.52
1.83
2.13
2.29
2.44
Advertisement
Table of Contents
