GARNET DIRECT VENT ROOM HEATER
250-6443B October 7, 2003 Page 25
R
GARNET DIRECT VENT ROOM HEATER
250-6443B October 7, 2003 Page 26
R
Step 2.
S
et the gas stove in its desired location. Drop a plumb bob
down from the ceiling to the position of the stove 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. Determine if ceiling joists, roof rafters, or other
framing will obstruct the venting system. You may wish to
relocate the stove, or to offset, as shown in
Fig. 11,
page
25
to avoid cutting loadbearing members.
Step 3.
To install the round support box/wall thimble in a flat
ceiling, cut a 10" (25.4cm) square hole in the ceiling,
centered on the hole drilled in Step 2. Frame the hole as
shown in
Fig. 13
.
VERTICAL INSTALLATION
FIG. 13
Step 4.
Assemble the desired lengths of GS pipe and elbows
necessary to reach from the stove up through the round
support box. Ensure that all pipe and elbow connections
are in their fully twist-locked position. Be sure to seal
the outer pipe with appropriate sealant (high temperature
silicone).
Step 5.
Cut a hole in the roof centered on the small drill hole
placed in the roof in Step 2. The hole should be of sufficient
size to meet the minimum requirements for clearance to
combustibles, as specified. Continue to assemble lengths
of pipe and elbows necessary to reach from the ceiling
support box up through the roof line. Galvanized pipe
and elbows may be utilized in the attic, as well as above
the roofline. The galvanized finish is desirable above the
roofline, due to its higher corrosion resistance.
NOTE:
(1
) If an offset is necessary in the attic to avoid
obstructions, it is important to support the vent pipe
every 3’ (91.4cm) to avoid excessive stress on the
elbows, and possible separation. Wall straps are
available for this purpose
, Fig. 11, page 25
.
(2) Whenever possible, use 45° elbows, instead of 90°
elbows. The 45° elbow offers less restriction to the
flow of flue gases and intake air.
Step 6.
Slip the flashing over the pipe section(s) protruding
through the roof. Secure the base of the flashing to
the roof with roofing nails. Ensure the roofing material
overlaps the top edge of the flashing as shown in
Fig. 14
.
Verify that the chimney is the required height above the
roof. See Roof Pitch Table on
page 27
of this manual
FIG. 14
FRAMING
1 - 1/2" LONG
WOOD SCREWS
CEILING
JOISTS
SHINGLES OVERLAP ON
TOP EDGE OF FLASHING
CAP AND STORM
COLLAR NOT SHOWN
FOR CLARITY
USING GS SERIES PIPE
(cont'd.)
