31449-4-1113
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Installing Support Brackets
A horizontal pipe support MUST BE used for each 3 feet of horizontal
run. The pipe supports should be placed around the pipe and nailed
in place to framing members. There MUST BE a 3 inch clearance
to combustibles above flue pipe and elbows and 1 inch clearance
on both sides and bottom of the flue pipe to combustibles on all
horizontal pipe sections and elbows.
Vertical runs of this vent systems must be supported every 4 feet
above the appliance flue outlet by wall brackets attached to the vent
pipe and secured with nails or screws to structural framing members.
PIPE STRAP
STUD WALL
1” MIN.
(25.4mm)
FLUE OUTLET
48”
(1219mm)
Figure 31
Installing Firestops
Firestops are required for safety whenever the vent system passes
through an interior wall, an exterior wall, or a ceiling. These firestops
act as a firebreak heat shield and as a means to insure that minimum
clearances are maintained to the vent system.
Horizontal runs in the vent system which pass through either interior
or exterior walls, require the use of wall firestops on both sides of
the wall through which the vent passes.
Cut an appropriate sized hole in wall.
See Figure 34.
Position
firestop on interior side of wall for hole.
Attention:
Wall firestop hole is off-set towards bottom of wall
opening. Secure with nails or screws. Continue the vent run through
the firestop.
See Figure 32
.
WALL FIRESTOP
HOLE IS OFF-SET
TOWARDS BOTTOM
OF WALL OPENING.
A
B
Vent Size
A
B
6 5/8"
10"
11"
8"
10 3/8" 12 3/8"
Figure 32
Vertical runs of this system which pass through ceilings require the
use of one ceiling firestop at the hole in each ceiling through which
the vent passes.
Position a plumb bob directly over the center of the vertical vent
component and mark the ceiling to establish the center point of the
vent. Drill a hole or drive a nail through this center point and check
the floor above for any obstructions such as wiring or plumbing
runs. Reposition the appliance and vent system, if necessary, to
accommodate ceiling joists and/or obstructions.
Cut an appropriate sized hole through the ceiling, using the center
point previously marked.
See Figure 33.
Frame the hole with framing
lumber the same size as the ceiling joists.
See Figure 33
. If the area
above the ceiling is NOT an attic, position and secure the ceiling
firestop on the ceiling side of the previously cut and framed hole.
See Figure 34
. If the area above the ceiling is an attic, position
and secure the firestop on top of the previously framed hole.
See
Figure 35.
NOTE:
Remove insulation from the framed area in the attic before
installing the firestop and/or vent pipes.
VENTING FRAMING AND FINISHING
