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105501-01F
For more information, visit www.desatech.com
For more information, visit www.desatech.com
15
15
VENTING INSTALLATION
Continued
INSTALLATION FOR VERTICAL
TERMINATION
NOTICE: Use rigid pipe only. Flex venting is not to be
used with a vertical termination.
Figure 30 - Offset with Wall Strap and 45° Elbows
45° Elbow
Wall Strap
Roof
Flashing
Ceiling Firestop
2. Assemble the desired lengths of pipe and elbows necessary to
reach from the burner system flue up through the firestop. All
connections must be sealed with high temperature silicone seal-
ant as specified in the second warning statement on page 11.
Be sure all pipe and elbow connections are fully twist-locked
(see Figure 21, page 13).
3. Cut a hole in the roof using the locating hole as a center point.
(Cover any exposed open vent pipes before cutting hole in roof.)
The 10"x10" hole must be measured on the horizontal; actual
length may be larger depending on the pitch of the roof. There
must be a 1" clearance from the vent pipe to combustible mate-
rials. Frame the opening as shown in Figure 22 on page 13.
4. Connect a section of pipe and extend up through the hole.
Note:
If an offset is needed to avoid obstructions, you must
support the vent pipe every 3 feet. Use wall straps for this
purpose (see Figure 30). Whenever possible, use 45° elbows
instead of 90° elbows. The 45° elbow offers less restriction to
the flow of the flue gases and intake air.
5. Place the flashing over the pipe section(s) extending through
the roof. Secure the base of the flashing to the roof and fram-
ing with roofing nails. Be sure roofing material overlaps the
top edge of the flashing as shown in Figure 30. There must be
a 1" clearance from the vent pipe to combustible materials.
6. Continue to add pipe sections until the height of the vent cap
meets the minimum building code requirements described in
Figure 18 on page 10.
Note:
You must increase vent height for
steep roof pitches. Nearby trees, adjoining rooflines, steep
pitched roofs, and other similar factors may cause poor draft
or down-drafting in high winds. Increasing the vent height may
solve this problem.
7. Twist-lock the vent cap onto the last section of vent pipe and
seal outer pipe connection with high temperature silicone seal-
ant as specified in the second warning statement on page 11.
Note:
If the vent pipe passes through any occupied areas above the
first floor, including storage spaces and closets, you must enclose
pipe. You may frame and sheetrock the enclosure with standard
construction material. Make sure and meet the minimum allowable
clearances to combustibles. Do not fill any of the required air spaces
with insulation.
1. Determine the route your vertical venting will take. If ceiling
joists, roof rafters, or other framing will obstruct the venting
system, consider an offset (see Figure 30) to avoid cutting
loadbearing members.
Note:
Pay special attention to these in-
stallation instructions for required clearances (air space) to com-
bustibles when passing through ceilings, walls, roofs, enclo-
sures, attic rafters, etc. Do not pack air spaces with insulation.
Also note maximum vertical rise of the venting system and
any maximum horizontal offset limitations. Offsets must fall
within the parameters shown in Figure 18 on page 10.
2. Set the stove in desired location. Drop a plumb line down from
the ceiling to the position of the burner system exit flue. Mark
the center point where the vent will penetrate the ceiling. Drill
a small locating hole at this point.
Drop a plumb line from the inside of the roof to the locating
hole in the ceiling. Mark the center point where the vent will
penetrate the roof. Drill a small locating hole at this point.
Flat Ceiling Installation
1. Cut a 10" square hole in the ceiling using the locating hole as a
center point. The opening should be framed to 10"x10" (254mm
x 254mm) inside dimensions, as shown in Figure 22 on page 13
using framing lumber the same size as the ceiling joists. If the
area above the ceiling is an insulated ceiling or a room, nail
firestop from the top side. This prevents loose insulation from
falling into the required clearance space. Otherwise, install
firestop below the framed hole. The firestop should be installed
with no less than three nails per side (see Figure 31).
VENTING INSTALLATION
Installation For Vertical Termination
Figure 31 - Installing Firestop
If area above is not a room, install
firestop below framed hole.
If area above is a room, install
firestop above framed hole.