Vermont Castings SDDVTCSBDSB Installation And Operating Instructions Manual page 24

Stardance® Direct Vent/Natural Vent Gas Heater
Figure 41 Horizontal termination.
ST931
Selkirk Horiz termination
6/07
Horizontal Termination
Figure 42 Vinyl siding standoff and horizontal termination.
with the horizontal termination. If no thimble is used,
ST932
place the Trim Plate (TP) on the DIRECT-TEMP pipe.
Selkirk standoff
Carefully push the DIRECT-TEMP pipe through the wall
6/07
until fully engaged with the horizontal termination. Se-
cure the trim plate to the wall.
NOTE: If a vertical rise is necessary on the exterior side
of the building, a 14" (356 mm) and 36" (914 mm) Snorkel
Termination (ST) is available. Follow the installation proce-
dures for horizontal terminations. If the snorkel termination
is to be located below grade, a window well is recommend-
ed with adequate and proper drainage as per local codes.
Leave 2" (51 mm) clearance below snorkel to prevent wa-
ter from entering the snorkel termination. Do not enclose
the snorkel within a wall or other type of enclosure and do
not back fill. Ensure that grade level slopes away from the
building. (Figure 39)
Vertical Installation (Figure 43)
1. Determine the location of the appliance. Choose a loca-
tion which provides adequate clearance from obstacles
such as electrical wiring, conduit, framing members,
plumbing pipe, etc.
2. After positioning the appliance, determine where the
vent pipe will pass through the ceiling. This can be done
by using a plum bob or a small weight attached to a
24
Horizontal Termination
Vinyl Siding Standoff
ST932
Storm Collar
Flashing
Firestop
Spacer
Ceiling Sup-
port Plate
Figure 43 Typical vertical venting configuration.
string. Hold the plum bob from the ceiling moving it until
it lines up with the centerline of the outlet of the appli-
ance. Mark the position on the ceiling.
ST933
NOTE: Frame openings to the dimensions specified in the
Selkirk vertical venting
framing table for the cathedral ceiling support box (CCS),
6/07
the ceiling support (SC) and wherever the firestop spacer
(FS) is being used.
3. Cut and frame the appropriate sized square hole through
the ceiling. Repeat the process for other ceiling penetra-
tions as necessary.
4. Determine and mark the roof penetration in the same
manner.
5. Cut a hole in the roof at this point large enough to satisfy
all clearance-to-combustible requirements as specified
by the appliance manufacturer's installation instructions.
6. Install the ceiling support cathedral ceiling support box
assembly, as appropriate.
7. Determine the distance from the appliance outlet to a
point just above [approximately 12" (305 mm) to 24"
Vertical Termination
Approved Silicone
Sealant Here
Offset Support
Collar
Ceiling Support Collar
Trim Plate
ST933
20306760