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4. Slip the wall cover over the interior end of the horizontal
pipe and install into the zero clearance sleeve. Seal the
joint inside the wall plate if needed to keep cold air from
being drawn into the home.
5. Install the vent terminal. (Fig. 22) Guide the inner and
outer vent termination collars into the adjacent pipes.
Double check that the vent pipes overlap the collars by
2". Fasten the termination to the outside wall with the
screws provided, and caulk the joint with weatherproof
sealant.
6. Use wall straps to support vertical pipe runs at 4' (1219
mm) intervals.
Horizontal Installation
Step 1. Set the gas appliance in its desired location.
Check to determine if wall studs or roof rafters are in the
way once the venting system is attached. If this is the
case, you may want to adjust the location of the appli-
ance.
Step 2. DirectVent Pro pipe and fittings are designed with
special twist-lock connections. To connect the venting
system to the appliance flue outlet, a twist-lock appliance
adaptor is built into the appliance at the factory. Assemble
the desired combinations of black pipe sections and el-
bows to the appliance adapter with pipe seams oriented
towards the wall or floor, as much out of view as possible.
(Fig. 24)
NOTES:
1. Twist-lock procedure: Line up locking lugs on male
and female ends of pipe sections. Insert the male end
of pipe into the female end until the locking lugs are
covered. Twist the female end clockwise an eighth of a
turn to lock sections together. (Fig. 25) Screws are not
required to secure the joint, but are acceptable pro-
vided they do not penetrate the inner wall of the vent
pipe.
20306761
Figure 24
ST976
St976
simp pipe
8/07
Intrepid® Direct Vent - Rear Vent Gas Heater
Figure 25
2. Horizontal vent runs of vent pipe must be supported
to prevent any downward sags. Horizontal pipe sec-
tions should be supported at least every 4' (1.2 m).
Wall straps can be used for this purpose. Alternatively,
plumbers tape or other suitable noncombustible mate-
rial can be used to support the vent pipe.
3. DirectVent Pro venting requires no sealant.
Step 3. With the appliance adapter and pipe section at-
tached, slide the stove into its correct location. Mark the
wall for a square hole that measures 10" x 10" (254 x
254 mm). The centerline of the pipe should line up with
the center of the square hole. (Fig. 26) Cut and frame
the square hole in the exterior wall where the vent will be
terminated. If the wall being penetrated is constructed of
noncombustible material only, i.e. masonry block, brick or
concrete only, a hole with zero clearance is acceptable.
NOTES:
Center of
Hole
C L
1. The horizontal run of venting must be level, or have a
1/4" (6 mm) rise for every 1' (305 mm) of run toward
the termination. Never allow the vent to run downward.
A downward slope can trap heat and become a pos-
sible fire hazard.
ST977
ST977
simp twist lock
8/07
Figure 26
ST978
St977
simpson framing
8/07
17
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