GARNET DIRECT VENT ROOM HEATER
250-6443B October 7, 2003 Page 27
R
GARNET DIRECT VENT ROOM HEATER
250-6443B October 7, 2003 Page 28
R
Step 1.
Follow installation Steps 1 and 2 under vertical
termination section,
pages 25 and 26
.
Step 2.
Using the plumb-bob, mark the centerline of the
venting system on the ceiling, and drill a small hole
through the ceiling and roof at this point. From the
roof, locate the drill hole and mark the outline of the
cathedral ceiling support box.
Step 3.
Remove shingles or other roof covering as necessary
to cut the rectangular hole for the support box. Cut the
hole 1/8” (3mm) larger than the support box outline.
Step 4.
Lower the support box through the hole in the roof
until the bottom of the box protrudes at least 2” (51cm)
below the ceiling
(Fig. 17).
Align the support box both
vertically and horizontally with a level. Temporarily tack
the support box in place through the inside walls and
into the roof sheathing.
Step 5.
Using tin snips, cut the support box from the top
corners down to the roofline, and fold the resulting
flaps over the roof sheathing
(Fig. 18
). Before nailing it
to the roof, run a bead of non-hardening mastic around
the top edges of the support box to make a seal
between it and the roof. Clean out any combustible
material from inside the support box.
Step 6.
Complete the cathedral ceiling installation by following
the same procedures outlined in steps 4 through 8 for
vertical terminations,
pages 26 & 27.
VERTICAL INSTALLATION
CATHEDRAL CEILING INSTALLATION
FIG. 17
FIG. 18
LEVEL
CATHEDRAL CEILING
SUPPORT BOX
2" MIN. BELOW
FINISHED CEILING
CUT HOLE 1/8" GREATER IN
SIZE THAN PATTERN OF
SUPPORT BOX AS IT IS
PROJECTED ONTO ROOF
LINE
